SC91650A 查看數據表（PDF） - Silan Microelectronics

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SC91650A

13 MEMORY TONE / PULSE DIALER WITH REDIAL SAVE HANDFREE & HOLD FUNCTION

Silan Microelectronics 

Silan

Semiconductors

SC91650/1/2 A/B

(continued)

Pin No.

Pin Name

650A/B 651A/B 652A/B

Description

676767

787878

OSCI

OSCO

*Oscillator input & output pins.

*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)

*When HKS is “LOW”, a valid key-in may turn on this oscillator and

generates a 3.579545 MHz clock.

*Mute output pins.

*NMOS open drain output structure.

*The output is in “LOW” state during dialing sequence (both Pulse

8 9 8 9 8 9 XMUTE

and Tone mode) and in Hold status otherwise this pin is

“high-impedance”.

*Long (continue) Mute.

9 10 9 10 9 10 VSS *Negative power supply pin.

10 13 10 13 10 13 VDD *Positive power supply pin.

11 14 11 14 11 14

HKS

*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, th e HKS pin must be pulled “low” state

for all function operation.

*Pulse output signal pin.

*Inverter output structure (SC91650).

12 15 12 15 12 15

PO

*The output is “LOW” during pulse dialing and Flash operation,

otherwise this output is “high”.

*NMOS open drain output structure.

13 16 13 16 13 16

TONE

*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.

*The TONE pin provides minimum tone duration (tTD) and minimum

intertone pause time to support rapid key-in. If key-in time is less than

tTD (100ms), DTMF signal will last for tTD (100ms); otherwise the tone

duration will last as long as the key is pressed.

14 17 14 17 14 17

MODE

*Mode select pin.

*Tri-state input structure.

*This pin can select following three modes.

(to be continued)

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

REV: 1.0

2001.01.15

9

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