Datasheet > FX651

FX651

更新时间： 2024-11-17 22:48:55

品牌	Logo	应用领域
CMLMICRO		半导体
页数	文件大小	规格书
16页	457K
描述
CML Semiconductor Products SPM and Security Subsystem

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FX651 数据手册

CML Semiconductor Products

^{SPM and Security Subsystem}FX651

D/651/4 September 1997

1.0

Features

Provisional Information

•

Two Integrated Telecoms

Functions:

•

Low Power (3.3V) Requirement

•

12kHz SPM Detector

Half Duplex 18kHz Modem

Component Adjustable Input

Sensitivity

•

Compact 16-pin Small Outline

(SOIC) Package

Meets European 12kHz SPM

Frequency Specifications

Card Operated Telephone

Installations

Worldwide Pay-Phone

Applications

VBIAS

1.1

Brief Description

The FX651 integrated circuit combines 12kHz Subscriber Private Metering (SPM) detection with 18kHz

tone processing for anti-fraud purposes within a telephone system. This compact, low power device is

suitable for battery or line powered systems. Under simple logic or Processor control it will:

Decode 12kHz SPM pulses in the presence of high level voice and 18kHz signalling, and

provide a logic output.

Transmit an NRZ modulated 18kHz security tone to line.

Decode an incoming modulated 18kHz security tone in the presence of high level voice

and 12 kHz SPM tones, and provide a logic output.

Employing high accuracy switched capacitor filters, the FX651 is protected from crosstalk and false

decoding.

1997 Consumer Microcircuits Limited

12 3 4 5 6 7...16

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