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SM8222A

Caller ID Service IC with Call Waiting

Nippon Precision Circuits  

NIPPON PRECISION CIRCUITS INC.

SM8222A/B

Caller ID Service IC with Call Waiting

OVERVIEW

The SM8222A/B is a calling number identification

(caller ID) and call waiting signal (dual tone signal)

receiver decoder IC that conforms with the TR-

NWT-000030 and SR-TSV-002476 (Bellcore) dialer

telephone number display standards. It is imple-

mented in CMOS and incorporates a power-down

function for low power operation.

FEATURES

s Conforms to TR-NWT-000030 and SR-TSV-

002476 (Bellcore) standards

s Call waiting

s FSK demodulator

s Ring signal detect circuit built-in

s High input sensitivity

s Input gain adjust circuit built-in

s Power-down mode

s Crystal oscillator circuit built-in

s Single supply operation

s Microcontroller I/O interface

s Molybdenum-gate CMOS process

s 24-pin SOP and 24-pin DIP packages

s SM8222A : 2.7 to 3.3V operation

s SM8222B : 4.5 to 5.5V operation

APPLICATIONS

s Telephones that display dialer number before and

during conversation

s Adapters to display dialer number before and dur-

ing conversation

s Answering machines

s Facsimile machines

s Computer peripheral devices

ORDERING INFORMATION

Device

SM8222AS

SM8222AP

SM8222BS

SM8222BP

Package

24-pin SOP

24-pin DIP

24-pin SOP

24-pin DIP

PINOUT

(Top View)

TIP 1

RING

GS

AGND

CAP

RDIN

RDRC

RDET

MODE

OSCIN

OSCOUT

GND 12

24 VDD

STGT

EST

STD

INT

CDET

DR

DOUT

DCLK

FSKEN

PDWN

13 IC

NIPPON PRECISION CIRCUITS—1

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