HM91710A/B TONE/PULSE TONE/PULES SWITCHABLE DIALER

Transcription

1 HM91710A/B /PULSE /PULES SWITCHABLE DIALER GENERAL DESCRIPTION The HM91710A/B are Tone/Pulse switchable dialer which are fabricated in CMOS technology with wide operating voltage for both tone and pulse mode, and consumes very low memory retention current in ON-HOOK state. FEATURES Tone/pulse switchable dialer. One 2-digit last number redial memory. Pulse to tone (P T) is provided for PBX operation. Flash key is available. Minimum tone duration is 98ms or 8ms. Minimum intertone pause is 98ms or 8ms. Uses MHz crystal or ceramic resonator. Many options can be selected. Mode (10 PPS ; 20 PPS ; Tone) M/B ratio (40 : 60 ; : 66) Pause time (.6s) Flash function (RESET) P T pause time (.6s) Flash time (600ms; 00ms; 100ms; or 80ms). Mixed dialing. Handfree function is provided for speaker phone application. Power on reset circuit is provided. Package in DIP18 or DIP16. PIN ASSIGNMENTS HM91710A HM91710B EM91710A EM91710B C2 C C4 C1 OSCI V SS R R2 R1 R4 VDD C2 C C4 C1 OSCI VSS HFI R R2 R1 R4 VDD HFO * This specification are subject to be changed without notice

2 /PULSE SWITCHABLE DIALER KEYBOARD ASSIGNMENT C1 C2 C C4 R1 1 2 P T R F R P R4 * 0 # RD 1). P T : In pulse mode, execute P T function. 2). F : Flash key. ). RD : Redial key. 4). P : Pause key. FUNCTIONAL BLOCK DIAGRAM COL1 COL2 COL COL4 OSCI ROW1 ROW2 ROW ROW4 OSC. COLUMN INTERFACE CKT. DIVIDER ROW INTERFACE CKT. KERNEL CONTROL CKT. OUTPUT INTERFACE CKT. LNB MEMORY INPUT INTERFACE CKT. PULSE GENERATOR DECODER & DATA LATCH ROW/COLUMN PROGRAMMING COUNTER D/A CONVERTER HFI HFO DIALING SIGNAL OPTION : a]:flash time: Row Row4 flash time(ms) NR NR 600 NR R 00 R R NR R b). Row1 Row2 MODE PULSE RATE M/B R NR R R NR NR PULSE 20PPS 40:60 NR R PULSE 20PPS :66 UR NR PULSE 10PPS 40:60 UR R PULSE 10PPS :66 c]:tone function: Col1 NR R Tone Duration 98 ms 8 ms inter-tone Pause 98 ms 8 ms d]:key type select Col2 * This specification are subject to be changed without notice. NR R *or*/t select * */T Note: NR:no resistance. R : A resistance connect to Vss (820KΩ typically) UR: A resistance connect to DD

3 /PULES SWITCHABLE DIALER PIN DESCRIPTION Symbol C1 C2 C C4 R1 R2 R R4 Function Provides keyboard scanning. a. Keyboard scanning: pin is LOW, the column group stays in "HIGH" stays and row group stays in "LOW" state. The key pad is compatible with the standard dual contact matrix keyboard (as Figure 1b.), the inexpensive single contact keyboard (as Figure 1a.), and electronic input (as Figure 1c.). When is "low", a valid key entry is defined by related Row & Column connection or by electronic input; (as show in Figure 1c). Activation of two or more keys will result in no response, except for single key. To avoid keyboard bouncing error, this chip provides built-in debounce circuit. (The debounce time = 20 ms.) Row Column Figure 1a : Single contact form keyboard configuration Row Column Figure 1b : Dual contact form keyboard configuration Row Column Figure 1c : Electronic signal input keyboard configuration OSCI Oscillator input & Oscillator output pins. The MHz oscillator is formed by a built-in inverter inside of this chip and by connecting a MHz crystal or a ceramic resonator across the OSCI and pins. (built-in feedback resistor and capacitor) When is low, a valid key-in may turn on this oscillator and generates a MHz clock. Mute output pins. NMOS open drain output structure. The output is in low state during dialing sequence (both Pulse and Tone mode) otherwise this pin is "high-impedance". Long (continue) Mute. Negative power supply pin. Positive power supply pin. Hook switch input pin. When the handset is in ON-HOOK state, this pin must be pulled "high" in order to disable the dialing operation and decrease the power consumption. When in OFF-HOOK state, the pin must be pulled "low" state for all function operation. Pulse output signal pin. NMOS open drain output structure. The output is "low" during pulse dialing and Flash operation, otherwise this output is "floating". * This specification are subject to be changed without notice

4 /PULSE SWITCHABLE DIALER Symbol HFI HFO Function Dual Tone Multi-frequency output pin. In mode, when a entry of digit key (include *, # key), this pin will sent out a corresponding DTMF signal. The pin provides minimum tone duration (t TD ),& minimum intertone pause time to support rapid key-in. If key-in time is less than t TD, DTMF signal will last for t TD, otherwise the tone duration will last as long as the key is pressed. Handfree input control pin. Toggle input sturcture, falling edge trigger. It is used to enable and disable Handfree function. With waveshaped by a built-in Schmit trigger, the bounce of input can be eliminated by external R, C debounce circuit. A built-in pull up resistor is 200K typical. Handfree output pin. Inverter output structure (normally "low", active "high"). When a HFI pin is active, Handfree function will be enabled (HFO=1) or disabled (HFO=0). When the Handfree function is enable (HFO=1), after OFF-HOOK action, it can reset Handfree function and HFO pin return to "low" state. FUNCTION DESCRIPTION Keyboard Operation Symbol definitions: a). : OFF-HOOK or enable Hand Free function. b). : ON-HOOK or disable Hand Free function. c). D 1...D n : Digit key; 1,2,,4,5,6,7,8,9,0,*,# (C 1...C n is same as D 1...D n ). d). D P1... D Pn : Pulse digit ; 1,2,,4,5,6,7,8,9,0, (C P1... C Pn is same as D P1... D Pn ). e). D t1...d tn : Tone digit ; 1,2,,4,5,6,7,8,9,0,*, # (C t1...c tn is same as D t1...d tn ). f). t F : Flash time. g). t P : Pause time. h). t PT : Pulse to Tone wait time. i). t FP : Pause time for flash. j). t RP : Pause time for redial. k). LNB : Last number redial buffer. A. Normal Dialing 1. Digit Dialing Procedure : D1,D , Dn Dial out : Dt1, Dt , Dtn in tone mode Dial out : Dp1, Dp , Dpn in pulse mode LNB : D1, D Dn * This specification are subject to be changed without notice

5 /PULES SWITCHABLE DIALER 2. Dialing with flash key Procedure : F,D1,D , Dn Dial out : t F, Dt1,Dt , Dtn in tone mode Dial out : t F,Dp1,Dp , Dpn in pulse mode LNB : D1, D Dn. Dialing with P T key Procedure : D1, D ,P T,....., Dn Dial out : Dp1, Dp2,.... t PT,....., Dtn in pulse mode LNB : D1, D2.....,P T,.... Dn Note : If key in digit over maximum digit stored in LNB, then RD is inhibited even after on/off hook. B. Mixed dialing Procedure : D1, D ,P T, D9,D10,....., Dn Dial out : Dp1, Dp2,.... t PT, Dt9,Dt , Dtn LNB : D1, D2.....,P T, D9,D Dn C. Redial LNB : D1, D Dn Procedure : RD Dial out : Dt1, Dt2,.... Dtn in tone mode Dial out : Dp1, Dp2,.... Dpn in pulse mode Note : If key in digit over maximum digit stored in LNB, then RD is inhibited. D. Pause Function Procedure : D1, D2,....Dn, P, C1.....Cn Dial out : Dt1, Dt2,.... Dtn, tp, Ct Ctn in tone mode Dial out : Dp1, Dp2,.... Dpn,tp, Cp Cpn in pulse mode LNB : D1, D Dn, P, C1, C Cn E. Flash Function 1. Reset Procedure : D1, D2,....Dn, F, C1.....Cn Dial out : Dt1, Dt2,.... Dtn, t F,Ct Ctn in tone mode Dial out : Dp1, Dp2,.... Dpn, t F,Cp Cpn in pulse mode LNB : C1, C Cn Handfree function operation: A). To execute Handfree function : When HFO = "low", HFI pin is active, the Handfree function will be enabled (HFO="HIGH"). B). Reset Handfree function: a. OFF-HOOK action. b. When HFO="high", a HFI pin is active again, the Handfree function will be reset (HFO="LOW"). * This specification are subject to be changed without notice

6 /PULSE SWITCHABLE DIALER Operating flow chart of Handfree ON INITIAL (0) HF HF OFF ON ON (1) HF LINE OFF OFF LINE (2) HF ON OFF HF LINE () HF STATE NO. HFO (0) INITIAL STATE F F 0 (1) ON HF LINE F F 1 (2) OFF LINE F F 0 () OFF HF LINE F F 1 * F : Floating (Hi-impedance) * Note : ON : ON OFF : OFF HF : Pressed HF key * This specification are subject to be changed without notice

7 /PULES SWITCHABLE DIALER TEST CIRCUIT 1 V+ Operation current 2 V+ Standby current A A KEY BOARD MODE DP DP DT COUNTER AND AC METER. V+ Tone output voltage 4 SPECTRUM ANALYZER V+ Tone distortion 10K KEYBOARD ENTRY 10K V KEYBOARD ENTRY 5 ** DIST.(dB)= 20log Ã(V1)**2+(V2)**2+..+(Vn)**2 Ã(VL)**2+(VH)**2 V + Pulse output sink current( open drain structure) a. V1...Vn are extraneous frequencies (ie, inter modulation and harmonic) components in the 500Hz to 400Hz band. b. VL,VH are the individual frequency components of the DTMF signal c. Whether keyboard is pushed refer to the mode time diagram 6 V + Keypad input A VEXT V Flash Key A V DD ROW V SS MODE R * C * 7 V+ Column R * A MODE C * Isink=I/(1-Duty Cycle) I is the net DC current measured from ampere meter. R*, C* mean others column and row. * This specification are subject to be changed without notice

8 /PULSE SWITCHABLE DIALER ABSOLUTE MAXIMUM RATINGS (Ambient Temperature is 25 o C, All voltage referenced to. ) Parameter Sym. Ratings Power Supply Voltage 6.0 V Input Voltage Range V IN -0. ~ + 0. V Operating Temperature T OPR 0 ~ 50 o C Storage Temperate T STO -55 ~125 o C Power Dissipation P D 500 mw ELECTRICAL CHARACTERISTICS (I) (Ambient Temperature is 25 o C, All voltage referenced to, = 2.5V, unless otherwise noted.) (General purpose specification, fosc. = MHz) Unit Parameter Operating Voltage Operating Current Standby Current Memory retention current Control pin input voltage pin leakage current sink current pin input current Keyboard scanning pin drive current sink current Key-in debounce time HFI pin input resistor HFO pin drive current sink current Sym. Iop Is Imr Vil Vih Imth Imtl Ihks Ikbd Ikbs t DB Rhfi Ihdoh Ihdol Conditions Min. Typ. Max. Unit Tone Pulse V Memory retension Tone ma OFF-HOOK, Keypad entry Pulse ma ON-HOOK, No Keypad entry µa ON-HOOK, = 1.0V µa - 0. V V Vxmute = 2.5V µa Vxmute = 0.5V ma Vhks = 2.5V µa *Vn = 0V, µa *Vn = 2.5V, µa ms Vhfi= KΩ Vhfo = 2.0V ma Vhfo = 0.5V ma * Vn : Input voltage of any keyboard scanning pin (Row group, Column group). * This specification are subject to be changed without notice

9 /PULES SWITCHABLE DIALER ELECTRICAL CHARACTERISTICS (II) (Ambient Temperature is 25 o C, All voltage referenced to, = 2.5V, unless otherwise noted.) (Pulse mode specification, fosc. = MHz) Parameter Pulse output pin,sdo pin leakage current sink current Pulse rate Make/Break ratio Pre-digit Pause Inter-digit Pause Parameter output pin DC level sink current AC level Load resistor DTMF signal: pre-emphasis *distortion Minimum tone duration Minimum intertone pause Sym. Ipoh Ipol fpr TM:TB t PDP t IDP Sym. Conditions Min. Typ. Max. Unit Vpo = 2.5V ua Vpo = 0.5V ma pps pps - 40:60 - % - :66 - % M/B ratio = 40: ms M/B ratio = : ms Pulse rate = 10pps ms Pulse rate = 20pps ms ELECTRICAL CHARACTERISTICS (III) (Ambient Temperature is 25 o C, All voltage referenced to, = 2.5V, unless otherwise noted.) ( mode specification, fosc. = MHz) Vdc Itl Vdtmf Rl twist Dist. t TD Conditions Min. Typ. Max. Unit = 2.0V~5.5V V Vdtmf = 0.5V ma Row group, RL = 10KΩ mvrms Dist.² -2dB KΩ = 2.0~5.5V, Column-Row group 1 2 db RL = 10KΩ db Auto redial - 98/8 - ms Auto redial - 98/8 - ms 2 2 * Distortion (db) = 20 log { [(V 1 + V 2 + V V n ) 1/2 2 ] / [(V L + V H2 ) 1/2 ]}. V L, V H : Row group and Column group signal. V 1,V 2,..., V n : Harmonic signal (BW = 00 Hz~ 500 Hz). * Actual frequency output (fosc. = MHz) KEYBOARD SCANNING PIN STANDARD (Hz) OUTPUT (Hz) DEVIATION (%) R1 f R2 f R f R4 f C1 f C2 f C f * This specification are subject to be changed without notice

10 /PULSE SWITCHABLE DIALER KEY IN 2 t DB t TD NORMAL DIALING High impedance Figure 2: Tone Mode Timing Diagram KEY IN 2 t DB t PDP t M t IDP t IDP t IDP t B t M NORMAL DIALING Figure : Pulse Mode Timing Diagram * This specification are subject to be changed without notice High impedance

11 /PULES SWITCHABLE DIALER KEY IN 2 P->T t DB t PDP t IDP t IDP T pt High impedance Figure 4: Timing Waveform for mixed dialing Operation (by P T key entry) KEY IN 1 2 t DB RD t D AUTO DIALING High impedance Figure 5: Tone Mode Redial Timing Diagram * This specification are subject to be changed without notice

12 /PULSE SWITCHABLE DIALER KEY IN 2 RD t DB t IDP t IDP t IDP t IDP High impedance Figure 6: Pulse Mode Redial Timing Diagram KEY IN 2 P *PULSE MODE: t DB t PDP t IDP t IDP T P t IDP * MODE: t DB T p High impedance Figure 7: Pause key operating timing * This specification are subject to be changed without notice

13 /PULES SWITCHABLE DIALER KEY IN F t DB T F High impedance Figure 8: Flash key operation timimg * This specification are subject to be changed without notice

14 APPLICATION CIRCUIT HM91710A/B /PULSE SWITCHABLE DIALER HM91710A EM91710A Application Example 22M IN4004*4 100K HOOK SW Tip Ring ON MPSA92 OFF IN K IN4148 0K 2K2 ZNR 120V IN4148 MPSA42 100K 100µ 16V.1µ 9 11 VDD HM91710A HM91710A EM91710A C1 C2 C C R1 R2 R R P T * OSCI VSS F 6 P R/P Z.D. 5V1 470K K7 C µ/16V 220K 1µ 100K 2 WIRE TO 4 WIRE SPEECH NETWORK TO HANDSEET 9 # VDD MHz 820k*6 20PPS 10PPS * This specification are subject to be changed without notice

15 APPLICATION CIRCUIT HM91710A/B /PULES SWITCHABLE DIALER Tip Ring IN4004*4 HOOK ON ZNR 120V HM91710B EM91710B Application Example 22M 100K IN4148 MPSA92 0K 0.1µF 2K7 2K2 200K IN K C K 100K + 1µ 100µ 16V +.1µ 5V1 K 47K C V DD 100K 47K HFO HF KEY MHz.1µ 9 HFI EM91710B 5 7 OSCI 10 HFO 6 8 C4 C C2 2 1 R1 R2 R R4 C K*6 C945.02µ TO 4 WIRE SPEECH NETWORK & AUDIO AMPLIFIER TO HANDSET * # P T F P RD VDD 20PPS 10PPS HM91710B * This specification are subject to be changed without notice

16 /PULSE SWITCHABLE DIALER PACKAGE INFORMATION Example : HM P (1) (2) () (1) ELAN MICRO. pefix (2) Type number () Package code: P PDIP K Skinny R SDIP 16 Lead Plastic Package E1 1 E D A A1 L C eb B e B1 16 PDIP MILIMETERS INCHES DIM MIN. MAX. MIN. MAX. A A B B C D E E e eb L * This specification are subject to be changed without notice

17 /PULES SWITCHABLE DIALER 18/20/28 Lead Plastic Package E1 1 E D A A1 L C eb 18 PDIP MILIMETERS INCHES DIM MIN. MAX. MIN. MAX. A A B B C D E E e eb L B e 20 PDIP MILIMETERS INCHES DIM MIN. MAX. MIN. MAX. A A B B C D E E e eb L B1 28 PDIP MILIMETERS INCHES DIM MIN. MAX. MIN. MAX. A A B B C D E E e eb L * This specification are subject to be changed without notice

18 /PULSE SWITCHABLE DIALER 22/24 Lead Plastic Package-Skinny E1 1 E D A A1 L C eb B e B1 22 PDIP (skinny) MILIMETERS INCHES DIM MIN. MAX. MIN. MAX. A A B B C D E E e eb L PDIP (skinny) MILIMETERS INCHES DIM MIN. MAX. MIN. MAX. A A B B C D E E e eb L * This specification are subject to be changed without notice

19 /PULES SWITCHABLE DIALER 42 SDIP Package E1 E D C A A2 A1 L D1 eb B e B1 42 SDIP MILIMETERS INCHES DIM MIN. MAX. MIN. MAX. A A A B B C D E e eb D L * This specification are subject to be changed without notice

20 This datasheet has been downloaded from: Datasheets for electronic components.