74F191 Up/down binary counter with reset and ripple clock

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1 INTEGRATED CIRCUITS Up/down binary counter with reset and ripple clock 1995 Jul 17 IC15 Data Handbook

2 FEATURES High speed 125MHz typical f MAX Synchronous, reversible counting 4-Bit binary Asynchronous parallel load capability Cascadable without external logic Single up/down control input DESCRIPTION The is a 4-bit binary counter. It contai four edge-triggered master/slave flip-flops with internal gating and steering logic to provide asynchronous preset and synchronous count-up and count-down operatio. Asynchronous parallel load capability permits the counter to be preset to any desired number. Information present on the parallel data inputs (D 0 - D 3 ) is loaded into the counter and appears on the outputs when the Parallel Load (PL) input is Low. This operation overrides the counting function. Counting is inhibited by a High level on the count enable () input. When is Low, internal state changes are initiated. Overflow/underflow indicatio are provided by two types of outputs, the Terminal Count (TC) and Ripple Clock (RC). The TC output is normally Low and goes High when: 1) the count reaches zero in the countdown mode or 2) reaches 15 in the count up mode. The TC output will remain High until a state change occurs, either by counting or presetting, or until is changed. TC output should not be used as a clock signal because it is subject to decoding spikes. The TC signal is used internally to enable the RC output. When TC is High and is Low, the RC follows the clock pulse. The RC output essentially duplicates the Low clock pulse width, although delayed in time by two gate delays. PIN CONFIGURATION D GND SF00729 V CC TYPE TYPICAL f MAX SUPPLY CURRENT TYPICAL (TOTAL) 125MHz 40mA ORDERING INFORMATION DESCRIPTION D 0 RC TC PL D 2 D 3 COMMERCIAL RANGE V CC = 5V ±10%, T amb = 0 C to +70 C PKG DWG # 16-pin plastic DIP NN SOT pin plastic SO ND SOT109-1 INPUT AND OUTPUT LOADING AND FAN-OUT TABLE PINS DESCRIPTION 74F(U.L.) HIGH/LOW LOAD VALUE HIGH/LOW D 0 - D 3 Data inputs 1.0/1.0 20µA/0.6mA Count enable input (active Low) 1.0/3.0 20µA/1.8mA Clock pulse input (active rising edge) 1.0/1.0 20µA/0.6mA PL Asynchronous parallel load control input (active Low) 1.0/1.0 20µA/0.6mA Up/down count control input 1.0/1.0 20µA/0.6mA 0-3 Flip-flop outputs 50/33 1.0mA/20mA RC Ripple clock output (active low) 50/33 1.0mA/20mA TC Terminal count output 50/33 1.0mA/20mA NOTE: One (1.0) FAST Unit Load (U.L.) is defined as: 20µA in the High state and 0.6mA in the Low state Jul

3 LOGIC SYMBOL LOGIC SYMBOL (IEEE/IEC) V CC =Pin 16 GND=Pin D 0 D 1 D 2 D 3 RC 13 TC 12 PL SF EN1 CTR DIV 10 M2[DOWN] 2(CT=0)Z6 M3[UP] 3(CT=15)Z6 1,2 /1,3+ G4 C5 [LOAD] 5D [1] [2] [4] [8] 6, 4, SF00731 LOGIC DIAGRAM D 0 D 1 D 2 D 3 PL J S D K R D J S D K R D J S D K R D J S D K R D V CC = Pin 16 GND = Pin 8 RC TC SF Jul 17 3

4 MODE SELECT FUNCTION TABLE INPUTS OUTPUTS OPERATING MODE PL D n n L L X X X X X X L H L H Parallel load H L l X Count up Count up H H l X Count down Count down H X H X X No change Hold (do nothing) TC AND RC FUNCTION TABLE INPUTS TERMINAL COUNT STATE OUTPUTS TC RC H H X H H H H L H L H X H H H H H H L L H H H H H L H X L L L L L H H H X L L L L H H H L L L L L H H = High voltage level steady state L = Low voltage level steady state X = Don t care = Low pulse = Low-to-High clock traition l = Low voltage level one set-up time prior to the Low-to-High clock traition 1995 Jul 17 4

5 APPLICATIONS DIRECTION CONTROL ENABLE CLOCK RC RC RC a. N-Stage Counter Using Ripple Clock DIRECTION CONTROL ENABLE RC RC RC CLOCK b. Synchronous N-Stage Counter with Common Clock Using Ripple/Clock DIRECTION CONTROL ENABLE * * TC TC TC CLOCK * = Carry Gate c. Synchronous N-Stage Counter with Common Clock and Terminal Count SF00733 Figure 1. The simplifies the design of multi-stage counters, as indicated in Figure 1, each RC output is used as the clock input for the next higher stage. When the clock source has a limited drive capability this configuration is particularly advantageous, since the clock source drives only the first stage. It is only necessary to inhibit the first stage to prevent counting in all stages, since a High signal on inhibits the RC output pulse as indicated in the Mode Select Table. The timing skew between state changes in the first and last stages is represented by the cumulative delay of the clock as it ripples through the preceding stages. This is a disadvantage of the configuration in some applicatio. Figure 1b shows a method of causing state changes to occur simultaneously in all stages. The RC output signals propagate in ripple fashion and all clock inputs are driven in parallel. The Low state duration of the clock in this configuration must be long enough to allow the negative-going edge of the RC signal to ripple through to the last stage before the clock goes High. Since the RC output of any package goes High shortly after its clock input goes High, there is no such restriction on the High state duration of the clock. In Figure 1c, the configuration shown avoids ripple delays and their associated restrictio. The combined TC signals from all the preceding stages forms the input signal for a given stage. An enable signal must also be included in each carry gate in order to inhibit counting. The TC output of a given stage is not affected by its own, therefore, the simple inhibit scheme of Figure 1a and 1b does not apply Jul 17 5

6 ABSOLUTE MAXIMUM RATINGS (Operation beyond the limits set forth in this table may impair the useful life of the device. Unless otherwise noted these limits are over the operating free-air temperature range.) SYMBOL PARAMETER RATING UNIT V CC Supply voltage 0.5 to +7.0 V V IN Input voltage 0.5 to +7.0 V I IN Input current 30 to + ma V OUT Voltage applied to output in High output state 0.5 to +V CC V I OUT Current applied to output in Low output state 40 ma T amb Operating free-air temperature range 0 to +70 o C T stg Storage temperature 65 to +150 o C RECOMMENDED OPERATING CONDITIONS LIMITS SYMBOL PARAMETER Min Nom Max UNIT V CC Supply voltage V V IH High-level input voltage V V IL Low-level input voltage 0.8 V I IK Input clamp current 18 ma I OH High-level output current 1 ma I OL Low-level output current 20 ma T amb Operating free-air temperature range 0 70 o C DC ELECTRICAL CHARACTERISTICS (Over recommended operating free-air temperature range unless otherwise noted.) LIMITS SYMBOL PARAMETER TEST CONDITIONS 1 Min Typ 2 Max UNIT V OH V OL High-level output voltage Low-level output voltage V CC = Min, V IL = Max, ±10%V CC 2.5 V I OH = Max, V IH = Min ±5%V CC V V CC = Min, V IL = Max, ±10%V CC V I OL = Max, V IH = Min ±5%V CC V V IK Input clamp voltage V CC = Min, I I = I IK V I I Input current at maximum input voltage V CC = Max, V I = 7.0V 100 µa I IH High-level input current V CC = Max, V I = 2.7V 20 µa I IL Low-level input current Others V CC = Max, V I =05V 0.5V 1.8 ma 0.6 ma I OS Short-circuit output current 3 V CC = Max ma I CC Supply current 4 (total) V CC = Max ma NOTES: 1. For conditio shown as MIN or MAX, use the appropriate value specified under recommended operating conditio for the applicable type. 2. All typical values are at V CC = 5V, T amb = 25 C. 3. Not more than one output should be shorted at a time. For testing I OS, the use of high-speed test apparatus and/or sample-and-hold techniques are preferable in order to minimize internal heating and more accurately reflect operational values. Otherwise, prolonged shorting of a High output may raise the chip temperature well above normal and thereby cause invalid readings in other parameter tests. In any sequence of parameter tests, I OS tests should be performed last. 4. Measure I CC all inputs grounded and all outputs open Jul 17 6

7 AC ELECTRICAL CHARACTERISTICS LIMITS T amb = +25 C T amb = 0 C to +70 C SYMBOL PARAMETER TEST CONDITIONS V CC = +V V CC = +V ± 10% UNIT C L = 50pF, R L = 500Ω C L = 50pF, R L = 500Ω f MAX f MAX Maximum clock frequency to n outputs Maximum clock frequency to RC outputs to n Waveform 1 to TC to RC to RC to RC to TC Min Typ Max Min Max Waveform MHz Waveform MHz Waveform 1 Waveform 2 Waveform 2 Waveform 2 Waveform 4 D n to n Waveform 3 D n to TC D n to RC Waveform 3 Waveform 4 Waveform 3 Waveform 4 PL to n Waveform 5 PL to TC PL to RC Waveform 5 Waveform Jul 17 7

8 AC SETUP REUIREMENTS LIMITS T amb = +25 C T amb = 0 C to +70 C SYMBOL PARAMETER TEST CONDITIONS V CC = +V V CC = +V ± 10% UNIT C L = 50pF, R L = 500Ω C L = 50pF, R L = 500Ω t s (H) t s (L) t h (H) t h (L) Setup time, High or Low D n to PL Hold time, High or Low D n to PL Waveform 6 Waveform 6 Min Typ Max Min Max t s (L) Setup time, Low to Waveform t h (L) Hold time, Low to Waveform t s (H) t s (L) t h (H) t h (L) t w (H) t w (L) Setup time, High or Low to Hold time, High or Low to Waveform 6 Waveform 6 Pulse width, High or Low Waveform 1 t w (L) PL Pulse width, Low Waveform 5 t rec Recovery time, PL to Waveform Jul 17 8

9 AC WAVEFORMS NOTE: For all waveforms, = 1.5V 1/f MAX t W (L), t W (H) RC RC, n, TC VM SF00734 Waveform 1. Propagation Delay, Clock Input to Output, Clock Pulse Width, and Maximum Clock Frequency. SF00735 Waveform 2. Propagation Delay, Clock, Clock Enable or Up/Down to Ripple Clock Output D n, D n RC, TC, n RC, TC SF00736 Waveform 3. Propagation Delay, Non-Inverting Path SF00737 Waveform 4. Propagation Delay, Inverting Path PL t W (L) t REC, D n t S (H) t h (H) t S (L) t h (L) PL TC, n RC, n SF00738 Waveform 5. Parallel Load Pulse Width, Parallel Load to Output Delay and Parallel Load to Clock Recovery Time The shaded areas indicate when the input is permitted to change for predictable output performance. Waveform 6. Data Set Up and Hold Times SF Jul 17 9

10 TEST CIRCUIT AND WAVEFORM PULSE GENERATOR V IN V CC D.U.T. V OUT NEGATIVE PULSE 90% 10% t THL ( t f ) t w t TLH ( t r ) 10% 90% AMP (V) 0V R T C L R L Test Circuit for Totem-Pole Outputs POSITIVE PULSE 10% 90% t TLH ( t r ) t w t THL ( t f ) 90% 10% AMP (V) 0V DEFINITIONS: R L = Load resistor; see AC ELECTRICAL CHARACTERISTICS for value. C L = Load capacitance includes jig and probe capacitance; see AC ELECTRICAL CHARACTERISTICS for value. R T = Termination resistance should be equal to Z OUT of pulse generators. family 74F Input Pulse Definition INPUT PULSE REUIREMENTS amplitude rep. rate t w t TLH t THL 3.0V 1.5V 1MHz SF Jul 17 10

11 Up/down binary counter with reset and ripple clock DIP16: plastic dual in-line package; 16 leads (300 mil) SOT Jul 17 11

12 Up/down binary counter with reset and ripple clock SO16: plastic small outline package; 16 leads; body width 3.9 mm SOT Jul 17 12

13 Up/down binary counter with reset and ripple clock NOTES 1995 Jul 17 13

14 Up/down binary counter with reset and ripple clock Data sheet status Data sheet status Product status Definition [1] Objective specification Preliminary specification Product specification Development ualification Production This data sheet contai the design target or goal specificatio for product development. Specification may change in any manner without notice. This data sheet contai preliminary data, and supplementary data will be published at a later date. Philips Semiconductors reserves the right to make chages at any time without notice in order to improve design and supply the best possible product. This data sheet contai final specificatio. Philips Semiconductors reserves the right to make changes at any time without notice in order to improve design and supply the best possible product. [1] Please coult the most recently issued datasheet before initiating or completing a design. Definitio Short-form specification The data in a short-form specification is extracted from a full data sheet with the same type number and title. For detailed information see the relevant data sheet or data handbook. Limiting values definition Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditio above those given in the Characteristics sectio of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability. Application information Applicatio that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors make no representation or warranty that such applicatio will be suitable for the specified use without further testing or modification. Disclaimers Life support These products are not designed for use in life support appliances, devices or systems where malfunction of these products can reasonably be expected to result in personal injury. Philips Semiconductors customers using or selling these products for use in such applicatio do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application. Right to make changes Philips Semiconductors reserves the right to make changes, without notice, in the products, including circuits, standard cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no respoibility or liability for the use of any of these products, conveys no licee or title under any patent, copyright, or mask work right to these products, and makes no representatio or warranties that these products are free from patent, copyright, or mask work right infringement, unless otherwise specified. Philips Semiconductors 811 East Arques Avenue P.O. Box 3409 Sunnyvale, California Telephone Copyright Philips Electronics North America Corporation 1998 All rights reserved. Printed in U.S.A. print code Date of release: Document order number: yyyy mmm dd 14

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