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Silan Semiconductors
TONE / PULSE SWITCHABLE DIALER WITH HANDFREE FUNCTION
DESCRIPTION
The SC91710A/B are Tone/Pulse switchable dialer which are fabricated in COMS technology with wide operating voltage for both tone and pulse mode, and consumes very low memory retention current in ON-HOOK state.
SC91710A/B
DIP-16
FEATURES
*Tone/Pulse switchable dialer *One 32-digit last number redial memory *Pulse-to-tone (PT) is provided for PBX operation *Flash key is available *Minimum tone duration is 98ms or 83ms *Minimum intertone pause is 98ms or 83ms *Redial Pause time (0ms) *Uses 3.579549MHz crystal or ceramic resonator *Many options can be selected Mode (10PPS; 20PPS; Tone) M/B ratio (40:60;33:66) Pause time (3.6s) *Flash function (RESET) (PT) pause time (3.6s) Flash time (600ms; 300ms; 100ms; or 80ms) *Mixed dialing *Power on reset circuit is provided *Handfree function is provided for speaker phone application *Packaged in 16-DIP or 18-DIP
DIP-18
ORDERING INFORMATION
SC91710A SC91710B DIP-16 Packaged DIP-18 Packaged
PIN CONFIGURATION
C2 C2 C3 C4 C1 OSCI OSCO XMUTE VSS
1 2 3 4 5 6 7 8 9 SC91710B
18 17 16 15 14 13 12 11 10
R3 R2 R1 R4 TONE PO HKS VDD HFO
1 2 3 4 5 6 7 8 SC91710A
16 15 14 13 12 11 10 9
R3 C3 R2 C4 R1 C1 R4 OSCI TONE OSCO PO XMUTE HKS VSS VDD HFI
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 2.0 2001-11-13
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BLOCK DIAGRAM
XMUTE HFO
SC91710A/B
VDD PULSE GENERATOR
COLUMN INTERFACE CKT.
COL1 COL2 COL3 COL4
INPUT INTERFACE CKT. PO
KERNEL CONTROL CKT.
DECODER & DATA LATCH
OSCI OSC. OSCO DIVIDER
LNB MEMORY ROW/COLUMN PROGRAMMING COUNTER
ROW1 ROW2 ROW3 ROW4
ROW INTERFACE CKT.
D/A CONVERTER INPUT INTERFACE CKT.
TONE
HKS
KEYBOARD ASSIGNMENT
C1 R1 R2 R3 R4
1 4 7 *or */T
C2
2 5 8 0
C3
3 6 9 #
C4
PT F P RD
1) PT: In pulse mode, execute PT function. 2) P: Pause key. 3) F: Flash key 4) RD: Redial key 5) In pulse mode, execute PT function. In tone mode, execte "*" key
DIALING SIGNAL OPTION
A: Flash time
Row3 Row4
B: Flash time(ms) 600 300 100 80
Row1
R R NR NR UR UR
Row2
NR R NR R NR R
MODE TONE TONE PULSE PULSE PULSE PULSE
VSS
HFI
PULSE RATE --20PPS 20PPS 10PPS 10PPS
M/B --40:60 33:66 40:60 33:66
NR NR R R
NR R NR R
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 2.0 2001-11-13
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C: Tone function
SC91710A/B
D: Key type select
Col1
NR R Note: R:
Tone Duration 98ms 83ms NR: no resistance
Inter-Tone Pause 98ms 83ms
Col2
NR R
*or */T select * */T
A resistance connect to VSS (820k typically)
UR: A resistance connect to VDD
ABSOLUTE MAXIMUM RATINGS
(Tamb=25C, All voltage referenced to VSS, unless otherwise specified)
Characteristic
Power Supply Voltage Input Voltage Power Dissipation Operating Temperature Storage Temperature
Symbol
VDD VIN PD Topr Tstg
Value
6.0 -0.3~VDD+0.3 500 -25~+70 -55~+150
Unit
V V mW C C
ELECTRICAL CHARACTERISTICS
(Tamb=25C, VDD=2.5V, fosc=3.579545MHz, unless otherwise specified)
Parameter
DC Characteristics
Symbol
Tone
Conditions
Min
2.5 2.0 1.0 ----VSS 0.7VDD -0.2 -4 200 --
Typ
--0.6 0.2 0.1 0.1
Max
5.5 5.5 5.5 2 0.5 1 0.2 0.3VDD VDD
Unit
Operating Voltage
VDD
Pulse Memory retention Tone Pulse OFF-HOOK, Keypad entry
V
Operating Current Standby Current Memory Retention Current Control Pin Input Low Voltage Control Pin Input High Voltage
IOP IS Imr Vil Vih Imth Imtl Ihks Ikbd Ikbs tDB
mA A A V A mA A A ms
ON-HOOK No keypad entry ON-HOOK VDD=1.0V --V XMUTE =6.0V V XMUTE =0.5V Vhks=2.5V Vn=0V note1 Vn=2.5 -note1
XMUTE Pin Leakage Current
-0.5 -10 400 20
1 -0.1 30 800 --
XMUTE Pin Sink Current
HKS Pin Input Current
Keyboard Scanning Pin Drive Current Sink Current
Key-in Debounce Time
(to be continued)
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 2.0 2001-11-13
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(continued)
SC91710A/B
Conditions
VDD=2.5 Vhfo=2.0V Vhfo=2.5V Vpo=2.5V Vpo=0.5V
Parameter
HFI pin input resistor HFO pin drive current HFO pin sink current Pulse Mode Pulse Output Pin Leakage Current Pulse Output Pin Sink Current Pulse Rate Make/Break Ratio Pre-digit Pause Inter-digit Pause Tone Mode DC Level Tone Output Pin Sink Current AC level Load Resistor DTMF Signal Pre-emphasis Distortion(note 2) Minimum tone duration Time Minimum Intertone Pause Time
Symbol
Rhfi Ihdoh Ihdol Ipoh Ipol fpr tM tB
Min
-0.5 0.5 0.1 0.5 -----
Typ
200 ----10 20 40:60 33:66 40 33 800 500 --155 -2 -30 98/83 98/83
Max
-------------0.7VDD -170 -3 -23 ---
Unit
k mA mA A mA pps % ms ms
tPDP tIDP
M/B ratio=40:60 M/B ratio=33:66 Pulse rate=10pps Pulse rate=20pps VDD=2.0V~5.5V Vdtmf=0.5V Row group Dist. -23dB VDD=2.0~5.5 V, Column-Row group RL=10K Auto redial Auto redial RL=10K
----0.5VDD 0.2 130 10 1 ----
Vdc Itl Vdtmf RI twist Dist. tTD tITP
V mA mVrms K dB dB ms ms
Note: 1. Vn: Input voltage of any keyboard scanning pin (Row group, Column group) 2 Distortion (dB) = 20log{[V12+V22+V32+...Vn2)1/2]/[(VL2+VH2)1/2]} VL,VH: Row group and Column group signal , V1 V2... Vn: Harmonic signal (BW = 300Hz~3500Hz
ACTUAL FREQUENCY OUTPUT (fosc=3.579545MHz)
Keyboard Scanning Pin
R1 R2 R3 R4 C1 C2 C3 f1 f2 f3 f4 f5 f6 f7
Standard(Hz)
697 770 852 941 1209 1336 1477
Output
699 766 848 948 1216 1332 1472
Deviation(%)
+0.28 -0.52 -0.47 +0.74 +0.57 -0.30 -0.34
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 2.0 2001-11-13
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PIN DESCRIPTION
Pin No. SC91710A SC91710B
4 4
SC91710A/B
Description
Pin Name
C1
*Provides keyboard scanning. * HKS pin is LOW, the column group stays in "HIGH" state and row group stays in "LOW" state. *The keypad is compatible with the standard dual contact matrix keyboard
1
1
C2
(as figure1b), the inexpensive single contact keyboard (as figure 1a), and electronic input (as figure 1c). *When HKS is "LOW", a valid key entry is defined by related Row &
2
2
C3
Column connection or by electronic input (as shown 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 = 20ms)
3
3
C4
14
16
R1
Row
Column
Row Column
15
17
R2
Figure1a: Single contact form keyboard configuration Row
Figure1b: Dual contact form keyboard configuration VDD VSS
16
18
R3
Column
VDD VSS
13
15
R4
Figure1c: Electronic signal input keyboard configuration
*Oscillator input & output pins. 5 5 OSCI *The 3.579545MHz oscillator is formed by a built-in inverter inside of this chip and by connecting a 3.579545MHz crystal or a ceramic resonator across the OSCI and OSCO pins. (built-in feedback resistor and capacitor) 6 6 OSCO *When HKS is "LOW", a valid key-in may turn on this oscillator and generates a 3.579545 MHz clock. (to be continued)
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 2.0 2001-11-13
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( continued )
SC91710A/B
Description
*Mute output pins. *NMOS open drain output structure.
Pin No. Pin Name SC91710 SC91710B A
7
7
XMUTE
*The output is in "LOW" state during dialing sequence (both Pulse and Tone mode) otherwise this pin is "high-impedance". *Long (continue) Mute.
8 9
8 11
VSS VDD
*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 HKS 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". *Dual Tone Multi-frequency output pin. *In TONE mode, when an entry of digit key (include *, # key), this pin will send out a corresponding DTMF signal.
10
12
HKS
11
13
PO
12
14
TONE
*The TONE pin provides minimum tone duration and minimum intertone pause time to support rapid key-in. If key-in time is less than 100ms, DTMF signal will last for 100ms; otherwise the tone duration will last as long as the key is pressed. * Handfree input control pin. * Toggle input structure, 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 down resistor is 200k typical. * Handfree output control pin. * Inverter output structure (normally `low', active `high'). * When a HFI pin is active, Handfree function will be enabled (HFO=1) or disable (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.
9
HFI
10
HFO
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 2.0 2001-11-13
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KEYBOARD OPERATION
Symbol definitions:
a) b) c) d) e) f) g) h) i) j) k) l) m) D1~Dn Dp1~Dpn Dt1~Dtn tF tP tPT tFP tRP LNB : : : : : : : : : : : : : OFF-HOOK or enable Hand Free function. ON-HOOK or disable Hand Free function. Input level from low to high. Input level from high to low.
SC91710A/B
Digit key 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, *, #, (C1~Cn is same as D1~Dn). Pulse digit Tone digit Flash time. Pause time. Pulse to Tone wait time. Pause time for flash. Pause time for redial. Last number redial buffer. 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, (Cp1~Cpn is same as Dp1~Dpn). 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, *, #, (Ct1~Ctn is same as Dt1~Dtn).
A Normal Dialing
1. Digit Dialing Procedure Dial out Dial out LNB D1, D2..., Dn Dtn (in Tone mode)
Dt1, Dp1, D1,
Dt2...,
Dp2,..., Dpn (in Pulse mode) D2..., Dn
2. Dialing with flash key Procedure Dial out Dial out LNB t F, t F, D1, F, D1, D2..., Dn tFP, tFP, Dt1, Dp1, Dn Dtn (in Tone mode) ..., Dpn (in Pulse mode)
Dt2..., Dp2,
D2...,
3. Dialing with PT key Procedure Dial out LNB D1, D1, D2 ..., PT , ..., Dn
Dp1,
Dp2, ..., D2 ...,
tPT, ..., Dpn (in Pulse mode) Dn
PT , ...,
Note: If key in digit over maximum digit stored in LNB, then RD is inhibit even after on/off hook.
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 2.0 2001-11-13
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B Mixed dialing
Procedure Dial out LNB D1, Dp1, D1, D2..., Dp2, ..., PT , tPT, D9, Dt9, D10 ..., Dt10..., Dn
SC91710A/B
Dn Dtn
D2..., PT ,
D9,
D10 ...,
C Redial
LNB Procedure Dial out Dial out D1, tRP, tRP, D2..., RD Dt2..., Dp2,..., Dtn (in Tone mode) (in Pulse mode) Dpn Dn
Dt1, Dp1,
Note: If key in digit over maximum digit stored in LNB, then RD is inhibit.
D Pause Function
Procedure Dial out Dial out LNB D1, D2..., Dn, P, C1 ..., Dtn, tP, Ct1, Cn Ctn (in Tone mode) Cpn (in Pulse mode)
Dt1, Dp1,
Dt2 ,...,
Dp2, ... Dpn , tP, Cp1 ...,
D1, D2..., Dn, P , C1, C2 ..., Cn
E Flash Function 1. Reset
Procedure Dial out Dial out LNB D1, D2..., Dn, F, C1 ..., Cn (in Tone mode) (in Pulse mode) Dt1, Dp1, C1, Dt2,..., Dtn , t F, Dp2,..., Dpn , C2 ..., Cn tFP, t F, Ct1 ..., Ctn
tFP, Cp1 ..., Cpn
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').
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 2.0 2001-11-13
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Operating flow chart of Handfree
ON HKS (0) INITIAL HF ON HKS (1) HF LINE HF OFF HF ON HF OFF HKS (3) HF LINE Note: OFF
SC91710A/B
ON OFF HKS (2) LINE
ON: ON HKS; OFF: OFF HKS; HF: Pressed HF key
STATE NO. (0) INITIAL STATE (1) ON HKS HF LINE (2) OFF HKS LINE (3) OFF HKS HF LINE
PO
XMUTE
HFO 0 1 0 1 * F: Floating (Hi-impedance)
F F F F
F F F F
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 2.0 2001-11-13
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TEST CIRCUIT
1
SC91710A/B
2
Operation current
V+
A
Standby current
V+
A
VDD
keyboard
HKS
MODE VSS
DP DP DT
VDD
HKS
VSS
3 Tone output voltage
V+
4 counter and AC meter
TONE
Tone distortion
V+
VDD
VDD
keyboard
VSS
Spectrum analyzer
TONE HKS
keyboard
10K VSS
HKS
V
10K
5
Pulse output sink current (open drain structure)
V+
6
Pulse output sink current (inverter structure)
V+
Flash key
VDD
PO HKS
A V
VEXT
VDD
HKS PO VSS
A V
VEXT
VSS
7 Keypad input current (row group)
V+
8 keypad input current (column group)
V+
A
ROW
VDD
R* C*
VDD COLUMN
R* C*
HKS VSS MODE
A
HKS VSS MODE
Note: 1. Dist. (dB)=20log{[V12+V22+V32+...Vn2)1/2]/[(VL2+VH2)1/2]} a. V1...Vn are extraneous frequencies (ie, inter modulation and harmonic), components in the 500Hz to 3400Hz band. b. VL,VH are the individual frequency components of DTMF signal.
c. Whether keyboard is pushed refer to the TONE mode time diagram. 2. Sink current Isink=I/(1-Duty Cycle), I is the net DC current measured from ampere meter. 3. R*, C* mean other column and row.
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 2.0 2001-11-13
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TIMING DIAGRAMS
HKS 3 KEY IN
tDB
SC91710A/B
2
3
XMUTE PO TONE
tTD tITP tITP tITP
OSCO Normal dialing Tone Mode Timming Diagram ......High impedance
HKS 3 KEY IN
tDB
2
3
XMUTE
tPDP tB tTD tIDP tM
PO TONE OSCO
tIDP
tIDP
Normal dialing
......High impedance
Pusle Mode Timming Diagram
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 2.0 2001-11-13
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TIMING DIAGRAMS (continued)
HKS 3 KEY IN
tDB
SC91710A/B
2
PT
3
XMUTE
tPDP
PO TONE OSCO ......High impedance Timming Waveform for mixed dialing Operation (by PT key entry)
tIDP tIDP tPT tITP
HKS KEY IN
F
tDB
XMUTE PO TONE OSCO ......High impedance Flash key operating timming
tF
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 2.0 2001-11-13
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TIMING DIAGRAMS(continued)
HKS 3 KEY IN
tDB
SC91710A/B
2
RD
XMUTE PO
tITP tITP tD tITP tITP
TONE OSCO
......High impedance Tone Mode Redial Timming Diagram
HKS 3 KEY IN
tDB
2
RD
XMUTE
tRP tIDP tIDP
PO
tIDP tIDP
TONE OSCO
......High impedance Pulse Mode Redial Timming Diagram
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 2.0 2001-11-13
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TIMING DIAGRAMS(continued)
HKS KEY IN
*PULSE MODE
SC91710A/B
3
tDB
2
P
3
XMUTE PO TONE OSCO
*TONE MODE
tPDP
tIDP
tIDP
tP
tIDP
tDB
XMUTE PO
tITP tITP tP tITP
TONE OSCO ......High impendance Pause key operating timming
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 2.0 2001-11-13
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SC91710A/B
1N4004x4 Tip MPSA92 1N4148
ON/OFF HOOK
1N4148x2
240k Ring ZNR 120V MPSA42 100k 2.2k 330k
2k 5.1V 100F 16V C945
100F 16V
1F
1F 470k
100k
11
1 4 7 * 0 # R/P 8 9 P 5 6 F 2 3 PT
9 14 R1 15 R2 16 R3 13 R4 C4 C3 C2 C1 3 2 1 4 OSCI 5 PO VDD
10 HKS TONE 12
SC91710A
XMUTE 7
TYPACAL APPLICATION CIRCUIT
OSCO VSS 6 8
TO HANDSET
Silan Semiconductors
3.579545MHz
VDD
820k x5
15
TONE 20pps 10pps
2 wrie to 4 wire Speech network
Rev: 2.0
22M
100k
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
2001-11-13
SC91710A/B
22M 1N4004x4 HOOK ON/OFF 100k MPSA92 240k Tip 1N4148
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
330k 200k ZNR 120V 3.3k C954 100k 47k 1F C945 470k 5.1V 47k 1F C954 200k 100F 16V 0.2F 2.7k Ring
13
1 4 7 * 0 # R/P 8 9 P 5 6 F 2 3 PT
12 14 R1 PO 15 R2 16 R3 13 R4 C4 C3 C2 C1 3 2 1 4 OSCI 5 HKS
11
14 VDD TONE HFO 10
SC91710B
XMUTE 7
TYPACAL APPLICATION CIRCUIT
HFI OSCO VSS 6 8
9
1F
TO HANDSET
HF KEY
Silan Semiconductors
3.579545MHz
VDD
820k x6
16
TONE 20pps 10pps
2 wrie to 4 wire Speech network & Audio amplifier
Rev: 2.0
2001-11-13
Silan Semiconductors
CHIP TOPOGRAPHY
SC91710A/B
Size: 1.45 x 1.54 mm
2
PAD COORDINATES (Unit: m)
No. 1 2 3 4 5 6 7 8 9 Symbol P1 P2 P3 P4 P5 P6 P7 P8 P9 X -542.6 -542.6 -542.6 -315.0 -134.8 85.5 562.4 562.4 562.4 Y -238.0 -468.1 -602.5 -602.5 -602.5 -602.5 -439.1 -277.6 -93.6 No. 10 11 12 13 14 15 16 17 18 Symbol P10 P11 P12 P13 P14 P15 P16 P17 P18 X 562.4 562.4 562.4 562.4 148.6 -22.4 -251.0 -542.6 -542.6 Y 88.5 252.4 445.8 603.8 603.8 603.8 603.8 124.7 -102.9
Note: The original point of the coordinate is the die center.
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 2.0 2001-11-13
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PACKAGE OUTLINE
SC91710A/B
UNIT: mm
2.54
DIP-16-300-2.54
6.40
1.50 19.4
7.62
15 degree
3.51
0.46
DIP-18-300-2.54
2.54
3.30
5.08
0.25
UNIT: mm
6.40
1.50 22.95
7.62
15 degree
3.51
0.46
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 2.0 2001-11-13
18
3.30
5.08
0.25

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