CF-8223A 参数 Datasheet PDF下载

CF8223A

FSK Decoder and DTMF Receiver IC

OVERVIEW

The CF8223A is a FSK (Frequency shift keying) decoder and DTMF (Dual tone multi-frequency) receiver IC.

It is fabricated using a CMOS process and features a power-down function for low power dissipation opera-

tion. The FSK decoder and DTMF receiver have the same performance characteristics as dedicated ICs that

perform the same functions, with the added benefit of an FSK decoder/DTMF receiver auto-select function

*

using the telephone tip/ring input signal. It also features a ring (call signal) signal detection circuit, making for

easy construction of low power dissipation, high-performance analog telephone-related applications.

*: Auto-select function operates if the FSK signal conforms to the Bellcore GR-30-CORE standard.

FEATURES

I

PAD LAYOUT

(Unit:

µ

m)

I

I

I

I

I

I

I

I

Both FSK signal caller-ID information services

and DTMF signal caller-ID information services

supported

FSK decoder/DTMF receiver auto-select function

Ring (call signal) signal detection circuit built-in

Serial I/O

Input gain adjustment circuit built-in

Power-down mode

Single supply operation: 3.0V ± 10%

3.579545MHz external crystal oscillator fre-

quency

Molybdenum-gate CMOS process

RING

TIP

VDD

DV

(2810, 3160)

GS

DOUT

AGND

FSK/DTMF

RDIN

IC

APPLICATIONS

RDRC

OSCIN

I

I

I

Telephones, fax machines and modems that sup-

port caller-ID information services

Adapters for caller-ID information service func-

tions

Telephones, fax machines and modems that sup-

port remote operation functions

(0, 0)

RDET

PDWN

GND OSCOUT

Pad size : 90

µ

m

×

90

µ

m

ORDERING INFORMATION

Device

CF8223A

Package

Chip form

NIPPON PRECISION CIRCUITS INC.—1