FX629

更新时间： 2024-11-17 22:48:55

品牌	Logo	应用领域
CMLMICRO		解码器编解码器
页数	文件大小	规格书
10页	95K
描述
Delta Modulation Codec

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数据手册

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FX629 数据手册

CML Semiconductor Products

PRODUCT INFORMATION

Delta Modulation Codec

FX629

Publication D/629/2 July 1994

Provisional Issue

Features/Applications

Designed to Meet Mil-Std-188-113

Military Communications

Programmable Sampling Clocks

3 or 4-bit Compand Algorithm

Forced Idle Facility

Delta MUX, Switch and Phone

Applications

Powersave Facility

Single 5V CMOS Process

Single-Chip Full-Duplex Codec

On-Chip Input and Output Filters

Full-Duplex CVSD* Codec

DATA ENABLE

ENCODER FORCE IDLE

ENCODER INPUT

MOD

V_DD

V_SS

ENCODER OUTPUT

f₁

f ₂

XTAL/CLOCK

f ₀

XTAL

CLOCK RATE

ENCODER DATA CLOCK

DECODER DATA CLOCK

V_BIAS

GENERATORS

FX629

MODE 1

CLOCK MODE

LOGIC

MODE 2

SAMPLING RATE

CONTROL

ALGORITHM

3 or 4-BIT

POWERSAVE

f ₃

f ₁

DECODER INPUT

DEMOD

DECODER OUTPUT

DECODER FORCE IDLE

Fig.1 Internal Block Diagram

Brief Description

The FX629 is an LSI circuit designed as a

The encoder has an enable function for use in

*Continuously Variable Slope Delta Codec and multiplexer applications.

is intended for use in military communications

systems.

Designed to meet Mil-Std-188-113 with

Encoder and Decoder forced idle facilities are

provided, forcing a 10101010..... pattern in

encode and a V_DD/2 bias in decode.

external components, the device is suitable for The companding circuits may be operated with

applications in military Delta Multiplexers,

switches and phones.

Encoder input and decoder output filters are

a pin-selected 3 or 4-bit algorithm.

The powersave facility puts the device into the

standby mode thereby reducing current

incorporated on-chip. Sampling clock rates can consumption when not operating.

be programmed to 16, 32 or 64 k bits/second

from an internal clock generator or may be

externally applied in the range 8 to 64 k bits/

A reference 1.024MHz oscillator uses an

external clock pulse or Xtal input.

The FX629 is a low-power, 5 volt CMOS

second. Sampling clock frequencies are output device and is available in 22-pin cerdip DIL

for the synchronization of external circuits. package.

12 3 4 5 6 7...10

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