Datasheet > FX641

FX641

更新时间： 2024-11-17 22:48:55

品牌	Logo	应用领域
CMLMICRO		/
页数	文件大小	规格书
13页	130K
描述
Dual Subscriber Private Metering (SPM) Detector

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数据手册

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FX641 数据手册

CML Semiconductor Products

PRODUCT INFORMATION

Dual Subscriber Private

Metering (SPM) Detector

FX641

Publication D/641/4 February 2001

Provisional Issue

Features

Two (12kHz/16kHz) SPM

Detectors on a Single Chip

Selectable Tone Follower or

Packet Mode Outputs

Detects 12kHz and 16kHz SPM

Frequencies

High Speech-Band Rejection

Properties

Xtal Accuracy; Stable Frequency

Limits

“Output Enable” Multiplexing

Facility

“Controlled” (µC) and “Fixed”

Signal Sensitivity Modes

Call-Charge Applications on

PABX Line Cards

V_DD

CLOCK OUT

CLOCK IN

XTAL/CLOCK

V_BIAS

XTAL/CLOCK

BUFFER

CLOCK

DIVIDERS

INTERNAL

CLOCKS

GENERATOR

V_SS

XTAL

12kHz/16kHz

SYSTEM

TONE FOLLOWER

Ch 1 AMP OUT

Ch1 AMP IN (-)

MODE

Ch 1

OUTPUT

COMPARATOR

PULSE

GENERATOR

AND

PULSE

MEASUREMENT

LOGIC

Ch 1

BANDPASS

FILTER

PULSE

LENGTH

LOGIC

OUTPUT

SELECT

CIRCUITS

DIVIDER

Ch1 AMP IN (+)

PACKET

MODE

INPUT

INTERNAL

COMPARATOR

THRESHOLD

AMPLIFIER

GAIN

ADJUST

CHANNEL 1

PRESET LEVEL

CHIP SELECT

OUTPUT

ENABLE

12kHz/16kHz

SYSTEM

SERIAL

DATA

FX641

12kHz/16kHz

SYSTEM

SERIAL

INPUT

LOGIC

LEVEL/

SYSTEM

SETTING

OUTPUT

SELECT

SERIAL

CLOCK

SYSTEM SELECT

INTERNAL

COMPARATOR

THRESHOLD

GAIN

ADJUST

CHANNEL 2

INPUT

PACKET

MODE

AMPLIFIER

Ch2 AMP IN (-)

PULSE

GENERATOR

AND

PULSE

MEASUREMENT

LOGIC

Ch 2

BANDPASS

FILTER

PULSE

LENGTH

LOGIC

OUTPUT

SELECT

CIRCUITS

DIVIDER

Ch2 AMP IN (+)

Ch 2 AMP OUT

Ch 2

OUTPUT

COMPARATOR

TONE FOLLOWER

MODE

Fig.1 Functional Block Diagram

Brief Description

The FX641 is a low-power, system-selectable Dual

Subscriber Private Metering (SPM) Detector -two

detectors on a single chip- to indicate the presence,

on a telephone line, of either 12kHz or 16kHz

telephone call-charge frequencies.

The digital output is pin-selectable to one of three

modes:

(1) Tone Follower mode -a logic level for the period of

a correct decode.

(2) Packet mode -respond/de-respond after a

cumulative period of tone or notone in a preset

period.

(3) High-impedance output -for device multiplexing.

For non-µProcessor systems a preset sensitivity/system

input allows external channel level and system setting.

This device, which is suitable for PBX and PABX

line-card and remote telephone installations, is available

in compact 24-pin plastic DIL and small outline (S.O.I.C.)

packages.

Under µProcessor control via a common serial

interface, each channel of the FX641 will detect

call-charge pulses from a telephone line and provide a

digital output for recording, billing or security

purposes.

A common set of external components and a stable

3.579545MHz Xtal/clock input ensures that the FX641

adheres accurately to most national “Must and Must-

Not” decode band-edges and threshold levels.

The FX641 requires approximately 4.5mA at 5-volts.

12 3 4 5 6 7...13

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与FX641相关器件

型号	品牌	获取价格	描述	数据表
FX641D2	CMLMICRO	获取价格	Dual Subscriber Private Metering (SPM) Detector
FX641P4	CMLMICRO	获取价格	Dual Subscriber Private Metering (SPM) Detector
FX643	CMLMICRO	获取价格	Call Progress Tone Detector
FX643D4	CMLMICRO	获取价格	Call Progress Tone Detector
FX643P1	CMLMICRO	获取价格	Call Progress Tone Detector
FX6-50P-0.8SV	HRS	获取价格	0.8mm Pitch Stacking Height 5 to 9mm Connector
FX6-50P-0.8SV(71)	HRS	获取价格	Board Stacking Connector, 50 Contact(s), 2 Row(s), Straight, 0.031 inch Pitch, Surface Mou
FX6-50P-0.8SV(92)	HRS	获取价格	Board Stacking Connector
FX6-50P-0.8SV(93)	HRS	获取价格	Board Stacking Connector
FX6-50P-0.8SV1	HRS	获取价格	0.8mm Pitch Stacking Height 5 to 9mm Connector

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