SM8224C

SEIKO NPC CORPORATION —1

Dual-Tone Receiver IC

OVERVIEW

The SM8224C is a receiver and decoder that supports the Bellcore TR-NWT-000030 and SR-TSV-002476

standards calling number identification (caller ID) and call waiting dual-tone signals. It has separate caller ID

signal and call waiting signal inputs, which allows the gain for each input to be adjusted independently. It is

fabricated in CMOS and features a power-down function, realizing low power dissipation operation.

FEATURES

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TR-NWT-000030 and SR-TSV-002476 standards

(Bellcore)

I

Call waiting

I

FSK decoder

I

High input sensitivity

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Independent input gain adjustment for caller ID

signal and call waiting signal inputs

I

Power-down mode

I

Crystal oscillator circuit built-in

I

Single supply operation: 2.7 to 5.5V

I

Molybdenum-gate CMOS process

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Package: 20-pin SSOP, Chip form

APPLICATIONS

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Telephones, fax machines and modems that support

pre- and mid-conversation information services

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Adapters for pre- and mid-conversation informa-

tion service functions

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Telephone answering machines

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Facsimile machines

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Computer peripheral equipment

ORDERING INFORMATION

PINOUT

(Top view)

PACKAGE DIMENSIONS

(Unit: mm)

Device

Package

SM8224CM

20-pin SSOP

CF8224C

Chip form

1

11

20

10

AGND

TIP

RING

TRQ

GND

DT1

DT2

DTQ

S0

S1

VDD

CDET

MODE

OSCIN

OSCOUT

TEST

CR

DTDET

STR

DOUT

7.20

± 0.05

7.40 max

0.68

± 0.12

0.65

0.30

± 0.10

0.10

0.20

± 0.05

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