# A Lesson on Digital Clocks, One Shots and Counters

Size: px
Start display at page:

## Transcription

1 A Lesson on Digital Clocks, One Shots and Counters

2 Topics Clocks & Oscillators LM 555 Timer IC Crystal Oscillators Selection of Variable Resistors Schmitt Gates Power-On Reset Circuits One Shots Counters Binary Counters Mod-n Counters Frequency Division Using Counters

3 Two Types of Digital Circuits Combinational: outputs at any instant of time are entirely dependent on the inputs present at that time Sequential: external outputs are a function of external inputs but also the present state

4 Sequential Circuits Synchronous: system whose behavior is defined by its signals and states at discrete instances of time Asynchronous: system whose behavior depends upon the order in which its inout signals change and can be affected at any instance of time

5 What is a clock? A clock is a device with no inputs and one output, defined by: Frequency Duty Cycle Magnitude f = 1/T DC = +pw/t* 100 where: +pw is positive pulse width and T is period

6 LM555 Timer IC The 555 is a multi-function device. Function depends on external configuration and components. Clock (Astable) One-Shot (Monostable) Pulse-Width Modulator And others...

7 LM555 Clock +V f = 1.44 / [ C1 * (Ra + 2Rb) ] range: 0.01 Hz to 1.00 MHz Ra 7 RESET* DISCH 4 Vcc 8 dc = 100 * { 1 - [Rb / (Ra + 2Rb) ] } range: 50 to 100 % Rb 6 2 THRES TRIG LM555 OUT 3 C1 CONT GND Magnitude = 0 V to +V range: 4.5 to 16V C uF

8 LM555 Clock Example Design a clock circuit using a 555 timer IC to produce a TTL clock with the given specs: f = 9600 Hz dc = 66.7 % Step 1: Select C1. Let C1 = 0.01 µf Step 2: Solve Ra vs. Rb ratio = 100 * {1 - [Rb / (Ra + 2Rb)]} 1.0 Rb = Ra Step 3: Solve for Exact Values 9600 Hz = 1.44 / [0.01 µf * (Ra + 2Rb)] 9600 Hz / 1.44 = 1 / [0.01 µf * (3.0*Rb)] Rb = 5000 Ω Ra = Rb = 5000 Ω

9 Crystal Oscillators Crystals: A crystal is made from a thinly cut piece of quartz sandwiched between two metal leads. Quarts crystals force oscillation at their natural (mechanical) frequency (or harmonics). The natural frequency is primarily a function of quartz thickness. Crystals stabilize the frequency of an oscillating circuit. They provide extremely good frequency stability (0.001 %).

10 Crystal Oscillator Circuits R1 R1 R2 C1 X1 C1 R2 X1 R3 R1 = R2 = 1 k C1 = 0.1 uf CMOS Series Oscillator TTL Series Oscillator Equations for CMOS Series Oscillator: R1 = 5 MΩ * e-(10 * 10-6f) R2 = 0.12 * R1 R3 = R2 / (0.3 Vcc - 0.5) Use the TTL circuit for Lab 3

11 Selection Of Variable Resistors Variable resistors or potentiometers (pots) are used to provide variable: frequencies duty cycles pulse widths They are also used to fine tune circuits to exact values. Fixed resistors do not come in every value. Pots can be used to get any value. However pots should be used with a series resistor.

12 Example: Design a clock that can produce a variable frequency output in the range 1200 to 9600 Hz. Step 1. Keeping C, and Ra the same, compute Rb for both frequencies. Assume 1200 Hz 9600 Hz Rb = 7.0K Ohms 2.7K Ohms Step 2. Use a combination of a fixed resistor in series with a pot for Rb such that: Rfixed < 2.7K Ohms Rfixed + Rpot > 7.0K Ohms Solution: Rfixed = 2.2K, 2.2K < Rb < 7.2K Rpot = 5K Keep the resistance of the pot large to have maximum variability. A small turn of the pot results in big change in frequency. Rb Rfixed Rpot

13 Example: A clock of frequency 9600 Hz +/- 0.1% is needed. Rb = 5000 Ohms - tolerance of resistors 20, 10, 5, 1% - tolerance of capacitors +80% to -20% Solution: Large fixed resistor in series with a small pot. Rfixed = 4700 Ohms, Rpot = 1K Ohms 4700 Ohms < Rb < 5700 Ohms Keep the fixed resistor value large compared to the pot to get best accuracy or maximum precision. CAUTION: Use pots sparingly: - cost: \$pots > \$fixed \$ to adjust - mechanical: noisy, unreliable

14 Schmitt Gates Schmitt Gate Characteristics Schmitt gates are essentially TTL inverters that treat inputs slightly different from normal CMOS or TTL. The input logic level is always defined. Schmitt-trigger inputs have different input threshold levels depending on the direction of the input signal. (Hysteresis) Inputs going from a low to a high voltage affect the output at V t+ (positive threshold). Inputs going from a high to a low voltage affect the output at V t- (negative threshold). Logic Symbol Vih = 3.15V Vin Vil = 1.35V Logic 1 undefined Logic 0 4.4V Vout 0.1V Vt+ = 3.0V Vin Vt- = 1.5V 1.5V 3.0V Vin Logic 1 Last unambiguous logic level Logic 0 a) HC Inputs b) HC Schmitt Inputs

15 Schmitt Gates Schmitt Gate Applications Signal Conditioning: cleaning up noisy, or distorted digital signals Line Drivers & Receivers Clocks & Delay Circuits Vin Logic Input 3.0V 1.5V 1 0 t Logic Output 1 0

16 Schmitt Inverter Clock R1 1k +5V R R C1 Vx 1uF IC1 7 Vout IC# Part# Vcc GND 1 74HC Vout 4.4V Vin Vin 4.4V Vout C C a) Vin == Logic 0 b) Vin == Logic 1 Assume C1 discharged before power is applied. Then Vx = 0.0V. Since Vx = Vin = logic 0, when power is applied Vout goes high (logic 1). Vth+ Vin Vth- 1 Input 0 1 Output 0 1 f t RC ln 2. 26

17 One Shot -- Monostable Multi-vibrators A one-shot is a circuit that produces a stable output (logic 1 or 0) until a trigger (+ or - edge) occurs. The trigger will cause the one-shot to produce a quasi-stable output for a time period determined by the circuit configuration. After the specified period of time, the output returns to the stable state. The pulse width of the quasi-stable state is independent of external stimulus. Usually, the pulse with is a function of a RC time constant. One-Shot TRIG OUT Tw = f(r,c) = 0.7RC (for a 74LS221) TRIG OUT Tw Tw A retriggerable one-shot output B Tw B non-triggerable one-shot output A

18 74LS221 Dual One-Shot The 74LS221 is a dual version of the 74LS121 TTL one-shot. The '221 has either a positive or negative edge trigger, and an active-high, or active-low output. C + 1Cext R 5 V 1Rext/Cext Tw = ln2 * RC range: 35 ns to 70 s for jitter free operation: 1A 1B 1CLR* 74LS221 (1/2) 1Q 1Q* 10 pf C 10 µf

19 Counters Binary Counters 0000,0001,0010,,1110,1111,0000 BCD Counters 0000,0001,,1000,1001,0000 Mod-n Counters 0,1,,n-1 or 1,2,,n 74HC161: 4-bit Counter 74HC190 BCD up/down Counter

20 Frequency Division Using Counters clk a b c d rco rco BCD Counter Timing Diagram Each bit on the output of a counter changes at a lower frequency than the previous bit. Freq d < Freq c < Freq b < Freq a < Freq clk How much of a difference are they?

21 Frequency Division Using Mod-n Counters f Mod-n clk counter F clk /n

22 Experiment #3: One Shots, Clocks and Counters Goals: Learn about one-shot circuits as pulse generators. Learn about crystal oscillators, counters and Mod-N counters. Prelab: Design a one-shot to produce an active low pulse from a positive-edge trigger. The pulse width should be the 4 msd s of your student ID as xxx.x ms. Suggestion Use the 74HC221 (or 74HC121) for one-shots. Complete the schematic diagram for a crystal TTL oscillator. Use a 4MHz crystal or other available crystal (<20MHz). Design an 8-bit synchronous counter. Design a Mod-7 counter that counts the sequence: 1,2,3,4,5,6,7 repeat. *Note-Review Experiment procedure for other Prelab needs.

23 Experiment Procedure: Build and test your one-shot. Measure Vhigh,Vlow,pulse width and rise time. Look for ringing and noise. Build and test your crystal oscillator. Measure: Vhigh, Vlow, frequency, Duty Cycle, pulse width and rise time. Measure frequency using the logic analyzer. Look for ringing and noise. Do not disassemble your circuit. Build and test your 8-bit counter. First use the CADET s TTL clock for trigger input. Then use a logic switch. Then use the bounceless pushbutton with a pull-up resistor. Connect the crystal oscillator output to the counter s trigger input. Measure the frequency at each counter output. Build and test your Mod-7 counter. Connect the output to a 7- segment display circuit.

### A Lesson on Digital Clocks, One Shots and Counters

A Lesson on Digital Clocks, One Shots and Counters Topics Clocks & Oscillators LM 555 Timer IC Crystal Oscillators Selection of Variable Resistors Schmitt Gates Power-On Reset Circuits One Shots Counters

### Experiment # 9. Clock generator circuits & Counters. Eng. Waleed Y. Mousa

Experiment # 9 Clock generator circuits & Counters Eng. Waleed Y. Mousa 1. Objectives: 1. Understanding the principles and construction of Clock generator. 2. To be familiar with clock pulse generation

### Chapter 9 Latches, Flip-Flops, and Timers

ETEC 23 Programmable Logic Devices Chapter 9 Latches, Flip-Flops, and Timers Shawnee State University Department of Industrial and Engineering Technologies Copyright 27 by Janna B. Gallaher Latches A temporary

### Designing With the SN54/74LS123. SDLA006A March 1997

Designing With the SN54/74LS23 SDLA6A March 997 IMPORTANT NOTICE Texas Instruments (TI) reserves the right to make changes to its products or to discontinue any semiconductor product or service without

### 1. Learn about the 555 timer integrated circuit and applications 2. Apply the 555 timer to build an infrared (IR) transmitter and receiver

Electronics Exercise 2: The 555 Timer and its Applications Mechatronics Instructional Laboratory Woodruff School of Mechanical Engineering Georgia Institute of Technology Lab Director: I. Charles Ume,

### Lab Unit 4: Oscillators, Timing and the Phase Locked Loop

Chemistry 8 University of WisconsinMadison Lab Unit : Oscillators, Timing and the Phase Locked Loop Oscillators and timing circuits are very widely used in electronic measurement instrumentation. In this

### TS555. Low-power single CMOS timer. Description. Features. The TS555 is a single CMOS timer with very low consumption:

Low-power single CMOS timer Description Datasheet - production data The TS555 is a single CMOS timer with very low consumption: Features SO8 (plastic micropackage) Pin connections (top view) (I cc(typ)

### ETEC 2301 Programmable Logic Devices. Chapter 10 Counters. Shawnee State University Department of Industrial and Engineering Technologies

ETEC 2301 Programmable Logic Devices Chapter 10 Counters Shawnee State University Department of Industrial and Engineering Technologies Copyright 2007 by Janna B. Gallaher Asynchronous Counter Operation

### css Custom Silicon Solutions, Inc.

css Custom Silicon Solutions, Inc. GENERAL PART DESCRIPTION The is a micropower version of the popular timer IC. It features an operating current under µa and a minimum supply voltage of., making it ideal

### NTE2053 Integrated Circuit 8 Bit MPU Compatible A/D Converter

NTE2053 Integrated Circuit 8 Bit MPU Compatible A/D Converter Description: The NTE2053 is a CMOS 8 bit successive approximation Analog to Digital converter in a 20 Lead DIP type package which uses a differential

### Pulse Width Modulation (PWM) LED Dimmer Circuit. Using a 555 Timer Chip

Pulse Width Modulation (PWM) LED Dimmer Circuit Using a 555 Timer Chip Goals of Experiment Demonstrate the operation of a simple PWM circuit that can be used to adjust the intensity of a green LED by varying

### Features. Applications

LM555 Timer General Description The LM555 is a highly stable device for generating accurate time delays or oscillation. Additional terminals are provided for triggering or resetting if desired. In the

### MM74HC4538 Dual Retriggerable Monostable Multivibrator

MM74HC4538 Dual Retriggerable Monostable Multivibrator General Description The MM74HC4538 high speed monostable multivibrator (one shots) is implemented in advanced silicon-gate CMOS technology. They feature

### ARRL Morse Code Oscillator, How It Works By: Mark Spencer, WA8SME

The national association for AMATEUR RADIO ARRL Morse Code Oscillator, How It Works By: Mark Spencer, WA8SME This supplement is intended for use with the ARRL Morse Code Oscillator kit, sold separately.

### The components. E3: Digital electronics. Goals:

E3: Digital electronics Goals: Basic understanding of logic circuits. Become familiar with the most common digital components and their use. Equipment: 1 st. LED bridge 1 st. 7-segment display. 2 st. IC

### CHAPTER 11: Flip Flops

CHAPTER 11: Flip Flops In this chapter, you will be building the part of the circuit that controls the command sequencing. The required circuit must operate the counter and the memory chip. When the teach

### LM555/NE555/SA555. Single Timer. Description. Features. Applications. Internal Block Diagram. Vcc GND. Trigger. Discharge. Output F/F.

Single Timer www.fairchildsemi.com Features High Current Drive Capability (00mA) Adjustable Duty Cycle Temperature Stability of 0.005%/ C Timing From µsec to Hours Turn off Time Less Than µsec Applications

### To design digital counter circuits using JK-Flip-Flop. To implement counter using 74LS193 IC.

8.1 Objectives To design digital counter circuits using JK-Flip-Flop. To implement counter using 74LS193 IC. 8.2 Introduction Circuits for counting events are frequently used in computers and other digital

### Wiki Lab Book. This week is practice for wiki usage during the project.

Wiki Lab Book Use a wiki as a lab book. Wikis are excellent tools for collaborative work (i.e. where you need to efficiently share lots of information and files with multiple people). This week is practice

### css Custom Silicon Solutions, Inc.

css Custom Silicon Solutions, Inc. CSS555(C) CSS555/ PART DESCRIPTION The CSS555 is a micro-power version of the popular 555 Timer IC. It is pin-for-pin compatible with the standard 555 timer and features

### 3-Digit Counter and Display

ECE 2B Winter 2007 Lab #7 7 3-Digit Counter and Display This final lab brings together much of what we have done in our lab experiments this quarter to construct a simple tachometer circuit for measuring

### Fairchild Semiconductor Application Note July 1984 Revised May 2001. Definition

Fairchild Semiconductor Application Note July 1984 Revised May 2001 Designer s Encyclopedia of One-Shots Introduction Fairchild Semiconductor manufactures a broad variety of monostable multivibrators (one-shots)

### A Digital Timer Implementation using 7 Segment Displays

A Digital Timer Implementation using 7 Segment Displays Group Members: Tiffany Sham u2548168 Michael Couchman u4111670 Simon Oseineks u2566139 Caitlyn Young u4233209 Subject: ENGN3227 - Analogue Electronics

### Having read this workbook you should be able to: recognise the arrangement of NAND gates used to form an S-R flip-flop.

Objectives Having read this workbook you should be able to: recognise the arrangement of NAND gates used to form an S-R flip-flop. describe how such a flip-flop can be SET and RESET. describe the disadvantage

### Operational Amplifier as mono stable multi vibrator

Page 1 of 5 Operational Amplifier as mono stable multi vibrator Aim :- To construct a monostable multivibrator using operational amplifier 741 and to determine the duration of the output pulse generated

### Lesson 12 Sequential Circuits: Flip-Flops

Lesson 12 Sequential Circuits: Flip-Flops 1. Overview of a Synchronous Sequential Circuit We saw from last lesson that the level sensitive latches could cause instability in a sequential system. This instability

### DM74121 One-Shot with Clear and Complementary Outputs

June 1989 Revised July 2001 DM74121 One-Shot with Clear and Complementary Outputs General Description The DM74121 is a monostable multivibrator featuring both positive and negative edge triggering with

### Latches, the D Flip-Flop & Counter Design. ECE 152A Winter 2012

Latches, the D Flip-Flop & Counter Design ECE 52A Winter 22 Reading Assignment Brown and Vranesic 7 Flip-Flops, Registers, Counters and a Simple Processor 7. Basic Latch 7.2 Gated SR Latch 7.2. Gated SR

### PLL frequency synthesizer

ANALOG & TELECOMMUNICATION ELECTRONICS LABORATORY EXERCISE 4 Lab 4: PLL frequency synthesizer 1.1 Goal The goals of this lab exercise are: - Verify the behavior of a and of a complete PLL - Find capture

### NOTE: The Flatpak version has the same pinouts (Connection Diagram) as the Dual In-Line Package.

PRESETTABLE BCD/DECADE UP/DOWN COUNTERS PRESETTABLE 4-BIT BINARY UP/DOWN COUNTERS The SN54/74LS90 is a synchronous UP/DOWN BCD Decade (842) Counter and the SN54/74LS9 is a synchronous UP/DOWN Modulo-6

### Fig1-1 2-bit asynchronous counter

Digital electronics 1-Sequential circuit counters Such a group of flip- flops is a counter. The number of flip-flops used and the way in which they are connected determine the number of states and also

### Operating Manual Ver.1.1

4 Bit Binary Ripple Counter (Up-Down Counter) Operating Manual Ver.1.1 An ISO 9001 : 2000 company 94-101, Electronic Complex Pardesipura, Indore- 452010, India Tel : 91-731- 2570301/02, 4211100 Fax: 91-731-

### EXPERIMENT 8. Flip-Flops and Sequential Circuits

EXPERIMENT 8. Flip-Flops and Sequential Circuits I. Introduction I.a. Objectives The objective of this experiment is to become familiar with the basic operational principles of flip-flops and counters.

### Digital Systems Based on Principles and Applications of Electrical Engineering/Rizzoni (McGraw Hill

Digital Systems Based on Principles and Applications of Electrical Engineering/Rizzoni (McGraw Hill Objectives: Analyze the operation of sequential logic circuits. Understand the operation of digital counters.

### Module 3: Floyd, Digital Fundamental

Module 3: Lecturer : Yongsheng Gao Room : Tech - 3.25 Email : yongsheng.gao@griffith.edu.au Structure : 6 lectures 1 Tutorial Assessment: 1 Laboratory (5%) 1 Test (20%) Textbook : Floyd, Digital Fundamental

### Digital Logic Elements, Clock, and Memory Elements

Physics 333 Experiment #9 Fall 999 Digital Logic Elements, Clock, and Memory Elements Purpose This experiment introduces the fundamental circuit elements of digital electronics. These include a basic set

### Digital Fundamentals

Digital Fundamentals Tenth Edition Floyd Chapter 1 2009 Pearson Education, Upper 2008 Pearson Saddle River, Education NJ 07458. All Rights Reserved Analog Quantities Most natural quantities that we see

### NE555 SA555 - SE555. General-purpose single bipolar timers. Features. Description

NE555 SA555 - SE555 General-purpose single bipolar timers Features Low turn-off time Maximum operating frequency greater than 500 khz Timing from microseconds to hours Operates in both astable and monostable

### How to Read a Datasheet

How to Read a Datasheet Prepared for the WIMS outreach program 5/6/02, D. Grover In order to use a PIC microcontroller, a flip-flop, a photodetector, or practically any electronic device, you need to consult

### Registers & Counters

Objectives This section deals with some simple and useful sequential circuits. Its objectives are to: Introduce registers as multi-bit storage devices. Introduce counters by adding logic to registers implementing

### LM139/LM239/LM339 A Quad of Independently Functioning Comparators

LM139/LM239/LM339 A Quad of Independently Functioning Comparators INTRODUCTION The LM139/LM239/LM339 family of devices is a monolithic quad of independently functioning comparators designed to meet the

### LAB4: Audio Synthesizer

UC Berkeley, EECS 100 Lab LAB4: Audio Synthesizer B. Boser NAME 1: NAME 2: The 555 Timer IC SID: SID: Inductors and capacitors add a host of new circuit possibilities that exploit the memory realized by

### NE555 SA555 - SE555. General-purpose single bipolar timers. Features. Description

NE555 SA555 - SE555 General-purpose single bipolar timers Features Low turn-off time Maximum operating frequency greater than 500 khz Timing from microseconds to hours Operates in both astable and monostable

### Counters. Present State Next State A B A B 0 0 0 1 0 1 1 0 1 0 1 1 1 1 0 0

ounter ounters ounters are a specific type of sequential circuit. Like registers, the state, or the flip-flop values themselves, serves as the output. The output value increases by one on each clock cycle.

### AP331A XX G - 7. Lead Free G : Green. Packaging (Note 2)

Features General Description Wide supply Voltage range: 2.0V to 36V Single or dual supplies: ±1.0V to ±18V Very low supply current drain (0.4mA) independent of supply voltage Low input biasing current:

### Cascaded Counters. Page 1 BYU

Cascaded Counters Page 1 Mod-N Counters Generally we are interested in counters that count up to specific count values Not just powers of 2 A mod-n counter has N states Counts from 0 to N-1 then rolls

### Interfacing To Alphanumeric Displays

Interfacing To Alphanumeric Displays To give directions or data values to users, many microprocessor-controlled instruments and machines need to display letters of the alphabet and numbers. In systems

### On/Off Controller with Debounce and

19-4128; Rev ; 5/8 On/Off Controller with Debounce and General Description The is a pushbutton on/off controller with a single switch debouncer and built-in latch. It accepts a noisy input from a mechanical

### Digital Fundamentals

igital Fundamentals with PL Programming Floyd Chapter 9 Floyd, igital Fundamentals, 10 th ed, Upper Saddle River, NJ 07458. All Rights Reserved Summary Latches (biestables) A latch is a temporary storage

### Counters and Decoders

Physics 3330 Experiment #10 Fall 1999 Purpose Counters and Decoders In this experiment, you will design and construct a 4-bit ripple-through decade counter with a decimal read-out display. Such a counter

### Sequential Logic Design Principles.Latches and Flip-Flops

Sequential Logic Design Principles.Latches and Flip-Flops Doru Todinca Department of Computers Politehnica University of Timisoara Outline Introduction Bistable Elements Latches and Flip-Flops S-R Latch

### INTEGRATED CIRCUITS. NE558 Quad timer. Product data Supersedes data of 2001 Aug 03. 2003 Feb 14

INTEGRATED CIRCUITS Supersedes data of 2001 Aug 03 2003 Feb 14 DESCRIPTION The Quad Timers are monolithic timing devices which can be used to produce four independent timing functions. The output sinks

### Asynchronous counters, except for the first block, work independently from a system clock.

Counters Some digital circuits are designed for the purpose of counting and this is when counters become useful. Counters are made with flip-flops, they can be asynchronous or synchronous and they can

### ICS379. Quad PLL with VCXO Quick Turn Clock. Description. Features. Block Diagram

Quad PLL with VCXO Quick Turn Clock Description The ICS379 QTClock TM generates up to 9 high quality, high frequency clock outputs including a reference from a low frequency pullable crystal. It is designed

### VOLTAGE-TO-FREQUENCY CONVERTER

VOTAGE-TO-FEQUENY ONVETE Internal circuit of M I VOTAGE EFEENE M OP AMP UENT MIO Q,9V Q P B Vin T ONE SHOT TIME VOT OMP VOT OMP S Q Q Q Q Q Q In direct transmission of an analog signal (below), V AN will

### WEEK 8.1 Registers and Counters. ECE124 Digital Circuits and Systems Page 1

WEEK 8.1 egisters and Counters ECE124 igital Circuits and Systems Page 1 Additional schematic FF symbols Active low set and reset signals. S Active high set and reset signals. S ECE124 igital Circuits

### Decimal Number (base 10) Binary Number (base 2)

LECTURE 5. BINARY COUNTER Before starting with counters there is some vital information that needs to be understood. The most important is the fact that since the outputs of a digital chip can only be

### Programmable Single-/Dual-/Triple- Tone Gong SAE 800

Programmable Single-/Dual-/Triple- Tone Gong Preliminary Data SAE 800 Bipolar IC Features Supply voltage range 2.8 V to 18 V Few external components (no electrolytic capacitor) 1 tone, 2 tones, 3 tones

### Memory Elements. Combinational logic cannot remember

Memory Elements Combinational logic cannot remember Output logic values are function of inputs only Feedback is needed to be able to remember a logic value Memory elements are needed in most digital logic

### Step Response of RC Circuits

Step Response of RC Circuits 1. OBJECTIVES...2 2. REFERENCE...2 3. CIRCUITS...2 4. COMPONENTS AND SPECIFICATIONS...3 QUANTITY...3 DESCRIPTION...3 COMMENTS...3 5. DISCUSSION...3 5.1 SOURCE RESISTANCE...3

### MADR-009443-0001TR. Quad Driver for GaAs FET or PIN Diode Switches and Attenuators. Functional Schematic. Features. Description. Pin Configuration 2

Features Functional Schematic High Voltage CMOS Technology Four Channel Positive Voltage Control CMOS device using TTL input levels Low Power Dissipation Low Cost 4x4 mm, 20-lead PQFN Package 100% Matte

### Lab 11 Digital Dice. Figure 11.0. Digital Dice Circuit on NI ELVIS II Workstation

Lab 11 Digital Dice Figure 11.0. Digital Dice Circuit on NI ELVIS II Workstation From the beginning of time, dice have been used for games of chance. Cubic dice similar to modern dice date back to before

### DIGITAL COUNTERS. Q B Q A = 00 initially. Q B Q A = 01 after the first clock pulse.

DIGITAL COUNTERS http://www.tutorialspoint.com/computer_logical_organization/digital_counters.htm Copyright tutorialspoint.com Counter is a sequential circuit. A digital circuit which is used for a counting

### Design Example: Counters. Design Example: Counters. 3-Bit Binary Counter. 3-Bit Binary Counter. Other useful counters:

Design Eample: ers er: a sequential circuit that repeats a specified sequence of output upon clock pulses. A,B,C,, Z. G, O, T, E, R, P, S,!.,,,,,,,7. 7,,,,,,,.,,,,,,,,,,,. Binary counter: follows the binary

### 1. Description. 2. Feature. 3. PIN Configuration

1. Description is a 9-channel LED driver control IC. Internal integrated with MCU digital interface, data flip-latch, LED high voltage driver and so on.through the external MCU control, the chip can achieve

### LM 358 Op Amp. If you have small signals and need a more useful reading we could amplify it using the op amp, this is commonly used in sensors.

LM 358 Op Amp S k i l l L e v e l : I n t e r m e d i a t e OVERVIEW The LM 358 is a duel single supply operational amplifier. As it is a single supply it eliminates the need for a duel power supply, thus

### Supply voltage Supervisor TL77xx Series. Author: Eilhard Haseloff

Supply voltage Supervisor TL77xx Series Author: Eilhard Haseloff Literature Number: SLVAE04 March 1997 i IMPORTANT NOTICE Texas Instruments (TI) reserves the right to make changes to its products or to

### CERAMIC RESONATOR PRINCIPLES

CERAMIC RESONATOR PRINCIPLES Principles of Operation for Ceramic Resonators Equivalent Circuit Constants: Fig.1.2 shows the symbol for a ceramic resonator. The impedance and phase characteristics measured

INTEGRATED CIRCUITS DATA SHEET For a complete data sheet, please also download: The IC06 74HC/HCT/HCU/HCMOS Logic Family Specifications The IC06 74HC/HCT/HCU/HCMOS Logic Package Information The IC06 74HC/HCT/HCU/HCMOS

### HCC4541B HCF4541B PROGRAMMABLE TIMER

HCC4541B HCF4541B PROGRAMMABLE TIMER 16 STAGE BINARI COUNTER LOW SYMMETRICAL OUTPUT RESISTANCE, TYPICALLY 100 OHM AT DD = 15 OSCILLATOR FREQUENCY RANGE : DC TO 100kHz AUTO OR MASTER RESET DISABLES OSCIL-

### HT9170 DTMF Receiver. Features. General Description. Selection Table

DTMF Receiver Features Operating voltage: 2.5V~5.5V Minimal external components No external filter is required Low standby current (on power down mode) General Description The HT9170 series are Dual Tone

### 74LS193 Synchronous 4-Bit Binary Counter with Dual Clock

74LS193 Synchronous 4-Bit Binary Counter with Dual Clock General Description The DM74LS193 circuit is a synchronous up/down 4-bit binary counter. Synchronous operation is provided by having all flip-flops

### Asynchronous Counters. Asynchronous Counters

Counters and State Machine Design November 25 Asynchronous Counters ENGI 25 ELEC 24 Asynchronous Counters The term Asynchronous refers to events that do not occur at the same time With respect to counter

### CD4027BMS. CMOS Dual J-K Master-Slave Flip-Flop. Pinout. Features. Functional Diagram. Applications. Description. December 1992

CD7BMS December 199 CMOS Dual J-K Master-Slave Flip-Flop Features Pinout High Voltage Type (V Rating) Set - Reset Capability CD7BMS TOP VIEW Static Flip-Flop Operation - Retains State Indefinitely with

### SN54/74LS192 SN54/74LS193

PRESEABLE BCD/DECADE UP/DOWN COUNER PRESEABLE 4-BI BINARY UP/DOWN COUNER he SN4/74LS2 is an UP/DOWN BCD Decade (842) Counter and the SN4/74LS3 is an UP/DOWN MODULO-6 Binary Counter. Separate Count Up and

### Sequential Logic: Clocks, Registers, etc.

ENEE 245: igital Circuits & Systems Lab Lab 2 : Clocks, Registers, etc. ENEE 245: igital Circuits and Systems Laboratory Lab 2 Objectives The objectives of this laboratory are the following: To design

INTEGRATED CIRCUITS DATA SHEET For a complete data sheet, please also download: The IC06 74HC/HCT/HCU/HCMOS Logic Family Specifications The IC06 74HC/HCT/HCU/HCMOS Logic Package Information The IC06 74HC/HCT/HCU/HCMOS

### Standart TTL, Serie 74... Art.Gruppe 13.15. 1...

Standart TTL, Serie 74... Art.Gruppe 13.15. 1... Standart TTL, Serie 74... 7400 Quad 2-Input Nand Gate (TP) DIL14 7402 Quad 2 Input Nor Gate (TP) DIL14 7403 Quad 2 Input Nand Gate (OC) DIL14 7404 Hex Inverter

### Push-Pull FET Driver with Integrated Oscillator and Clock Output

19-3662; Rev 1; 5/7 Push-Pull FET Driver with Integrated Oscillator General Description The is a +4.5V to +15V push-pull, current-fed topology driver subsystem with an integrated oscillator for use in

### Conversion Between Analog and Digital Signals

ELET 3156 DL - Laboratory #6 Conversion Between Analog and Digital Signals There is no pre-lab work required for this experiment. However, be sure to read through the assignment completely prior to starting

### ASYNCHRONOUS COUNTERS

LB no.. SYNCHONOUS COUNTES. Introduction Counters are sequential logic circuits that counts the pulses applied at their clock input. They usually have 4 bits, delivering at the outputs the corresponding

### A simple RF/Microwave frequency counter

Matjaz Vidmar, S53MV A simple RF/Microwave frequency counter I decided to design a simple, easily reproducible counter around a PIC 16F876A. The basic counter range is extended to at least 180MHz using

### Chapter 8. Sequential Circuits for Registers and Counters

Chapter 8 Sequential Circuits for Registers and Counters Lesson 3 COUNTERS Ch16L3- "Digital Principles and Design", Raj Kamal, Pearson Education, 2006 2 Outline Counters T-FF Basic Counting element State

### Objectives: Part 1: Build a simple power supply. CS99S Laboratory 1

CS99S Laboratory 1 Objectives: 1. Become familiar with the breadboard 2. Build a logic power supply 3. Use switches to make 1s and 0s 4. Use LEDs to observe 1s and 0s 5. Make a simple oscillator 6. Use

### NOTE: The Flatpak version has the same pinouts (Connection Diagram) as the Dual In-Line Package.

PRESETTABLE BCD/DECADE UP/DOWN COUNTERS PRESETTABLE 4-BIT BINARY UP/DOWN COUNTERS The SN54/74LS190 is a synchronous UP/DOWN BCD Decade (8421) Counter and the SN54/74LS191 is a synchronous UP/DOWN Modulo-

### DS1307ZN. 64 x 8 Serial Real-Time Clock

DS137 64 x 8 Serial Real-Time Clock www.maxim-ic.com FEATURES Real-time clock (RTC) counts seconds, minutes, hours, date of the month, month, day of the week, and year with leap-year compensation valid

### ICS9148-32. Pentium/Pro TM System Clock Chip. Integrated Circuit Systems, Inc. General Description. Pin Configuration.

Integrated Circuit Systems, Inc. ICS948-32 Pentium/Pro TM System Clock Chip General Description The ICS948-32 is a Clock Synthesizer chip for Pentium and PentiumPro CPU based Desktop/Notebook systems that

### Upon completion of unit 1.1, students will be able to

Upon completion of unit 1.1, students will be able to 1. Demonstrate safety of the individual, class, and overall environment of the classroom/laboratory, and understand that electricity, even at the nominal

INTEGRATED CIRCUITS DATA SEET For a complete data sheet, please also download: The IC6 74C/CT/CU/CMOS ogic Family Specifications The IC6 74C/CT/CU/CMOS ogic Package Information The IC6 74C/CT/CU/CMOS ogic

### SG2525A SG3525A REGULATING PULSE WIDTH MODULATORS

SG2525A SG3525A REGULATING PULSE WIDTH MODULATORS 8 TO 35 V OPERATION 5.1 V REFERENCE TRIMMED TO ± 1 % 100 Hz TO 500 KHz OSCILLATOR RANGE SEPARATE OSCILLATOR SYNC TERMINAL ADJUSTABLE DEADTIME CONTROL INTERNAL

### Engr354: Digital Logic Circuits

Engr354: igital Circuits Chapter 7 Sequential Elements r. Curtis Nelson Sequential Elements In this chapter you will learn about: circuits that can store information; Basic cells, latches, and flip-flops;

### A Trigger Circuit for the 555 Timer IC Scope

Scope This document describes a trigger circuit that allows the 555 timer IC to produce a voltage pulse when triggered with a voltage that is brought low and held low for an arbitrary amount of time (even

### IEC 1000-4-2 ESD Immunity and Transient Current Capability for the SP72X Series Protection Arrays

IEC 00-4-2 ESD Immunity and Transient Current Capability for the SP72X Series Protection Arrays Application Note July 1999 AN9612.2 Author: Wayne Austin The SP720, SP721, SP723, and SP724 are protection

### Building an Auto-Ranging DMM with the ICL7103A/ICL8052A A/D Converter Pair

Building an Auto-Ranging DMM with the ICL7103A/ICL8052A A/D Converter Pair Application Note September 1999 AN028 Introduction The development of LSI A/D converters has carved the pathway for a new category

### Physics 623 Transistor Characteristics and Single Transistor Amplifier Sept. 13, 2006

Physics 623 Transistor Characteristics and Single Transistor Amplifier Sept. 13, 2006 1 Purpose To measure and understand the common emitter transistor characteristic curves. To use the base current gain

### Flip-Flops and Sequential Circuit Design. ECE 152A Winter 2012

Flip-Flops and Sequential Circuit Design ECE 52 Winter 22 Reading ssignment Brown and Vranesic 7 Flip-Flops, Registers, Counters and a Simple Processor 7.5 T Flip-Flop 7.5. Configurable Flip-Flops 7.6

### Flip-Flops and Sequential Circuit Design

Flip-Flops and Sequential Circuit Design ECE 52 Winter 22 Reading ssignment Brown and Vranesic 7 Flip-Flops, Registers, Counters and a Simple Processor 7.5 T Flip-Flop 7.5. Configurable Flip-Flops 7.6

### Designer s Encyclopedia of Bipolar One-Shots

Designer s Encyclopedia of Bipolar One-Shots INTRODUCTION National Semiconductor manufacturers a broad variety of industrial bipolar monostable multivibrators (one-shots) in TTL and LS-TTL technologies