CMX631A Ver la hoja de datos (PDF) - MX-COM Inc

Número de pieza

componentes Descripción

Lista de partido

CMX631A

Low Voltage SPM Detector

MX-COM Inc  

DATA BULLETIN

CMX631A

Low Voltage

SPM Detector

PRELIMINARY INFORMATION

Features

• Detects 12kHz or 16kHz SPM

Frequencies

• Tone Follower and Packet Mode

Outputs

• High Speech-Band Rejection

Properties

• Low Power Operation (3.0V < 0.8mA)

Applications

• Call Charge Applications on PABX Line

Cards

• Complex and/or Simple telephone

Systems

• Remote Telephone/Payphones

XTAL/CLOCK

XTAL

XTAL/CLOCK

OSCILLATOR

VDD

VBIAS

VSS

SYSTEM (12kHz/16kHz)

INPUT AMP

SIGNAL IN (-) -

+

SIGNAL IN (+)

AMP OUT

12kHz/16kHz

+20dB

CLOCK OUT

CLOCK IN

SYSTEM

CLOCK

DIVIDERS

TONE FOLLOWER

OUTPUT

TONE

FOLLOWER

LOGIC

LEVEL DETECTOR

32

1

DIVIDER

PERIOD

MEASURE

SYSTEM

PACKET MODE

OUTPUT

PACKET

TONE

LOGIC

The CMX631A is a low-power, system-selectable Subscriber Pulse Metering (SPM) detector that indicates the

presence of both 12kHz or 16kHz telephone call-charge frequencies on a telephone line.

Deriving its input directly from the telephone line, input amplitude/sensitivities are component adjustable to the

user's national ‘Must/Must-Not Decode’ specifications via an on-chip input amplifier. The 12kHz and 16kHz

frequency limits are accurately defined by the use of an external 3.579545MHz telephone-system Xtal or

clock-pulse input.

The CMX631A demonstrates exceptional 12kHz and 16kHz performance in the presence of both voice and

noise. This device may operate from a single or differential analog signal input, from which two individual

logic outputs will be produced; a Tone Follower Output or a Packet Mode Output.

This system (12kHz/16kHz) selectable integrated circuit, requires a 2.7V to 5.5V power supply, which may be

line-powered, is available in the following packages: 24-pin SSOP (CMX631AD5), 16-pin SOIC

(CMX631AD4), and 16-pin PDIP (CMX631AP3). Additional package styles may be available to meet specific

design requirements.

© 1999 MX•COM Inc.

www.mxcom.com Tele: 800 638-5577 336 744-5050 Fax: 336 744-5054

Doc. # 20480177.004

4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All trademarks and service marks are held by their respective companies.

Share Link: