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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 TRNWT-000030 and SR-TSV-002476 (Bellcore) dialer telephone number display standards. It is implemented in CMOS and incorporates a power-down function for low power operation.

FEATURES

■ Conforms to TR-NWT-000030 and SR-TSV- 002476 (Bellcore) standards

■ Call waiting

■ FSK demodulator

■ Ring signal detect circuit built-in

■ High input sensitivity

■ Input gain adjust circuit built-in

■ Power-down mode

■ Crystal oscillator circuit built-in

■ Single supply operation

■ Microcontroller I/O interface

■ Molybdenum-gate CMOS process

■ 24-pin SOP and 24-pin DIP packages

■ SM8222A : 2.7 to 3.3V operation

■ SM8222B : 4.5 to 5.5V operation

APPLICATIONS

■ Telephones that display dialer number before and during conversation

■ Adapters to display dialer number before and during conversation

■ Answering machines

■ Facsimile machines

■ Computer peripheral devices