FX619 データシートの表示（PDF） - CML Microsystems Plc

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FX619

"Eurocom" Delta Codec

CML Microsystems Plc 

CML Semiconductor Products

PRODUCT INFORMATION

FX619 'Eurocom' Delta Codec

Features/Applications

Designed to Meet Eurocom D1-IA8f

Meets Stanag 4209 and

Stanag 4380

Military Communications

Delta MUX, Switch and Phone

Applications

Single Chip Full Duplex Codec

Publication D/619/6 September 1997

On-Chip Input and Output Filters

Programmable Sampling Clocks

3 or 4-bit Compand Algorithm

Forced Idle Facility

Powersave Facility

Single 5V CMOS Process

Full Duplex CVSD* Codec

DATA ENABLE

ENCODER FORCE IDLE

ENCODER INPUT

VDD

V SS

XTAL/CLOCK

f1

XTAL

ENCODER DATA CLOCK

DECODER DATA CLOCK

VBIAS

MODE 1

MODE 2

ALGORITHM

CLOCK MODE

LOGIC

POWERSAVE

f3

DECODER INPUT

DEMOD

DECODER FORCE IDLE

Fig.1 Internal Block Diagram

f0

CLOCK RATE

GENERATORS

MOD

ENCODER OUTPUT

f2

SAMPLING RATE

CONTROL

3 or 4-BIT

f1

DECODER OUTPUT

FX619

Brief Description

The FX619 is an LSI circuit designed as a

*Continuously Variable Slope Delta Codec and

is intended for use in military communications

systems.

Designed to meet Eurocom D1-IA8 with

external components, the device is suitable for

applications in military Delta Multiplexers,

switches and phones.

Encoder input and decoder output filters are

incorporated on-chip. Sampling clock rates can

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/

second. Sampling clock frequencies are output

for the synchronization of external circuits.

The encoder has an enable function for use in

multiplexer applications. Encoder and Decoder

forced idle facilities are provided forcing a

10101010..... pattern in encode and a VDD/2

bias in decode. The companding circuits may

be operated with a 3 or 4-bit algorithm which is

externally selected. The device may be put in

the standby mode by selection of the

powersave facility. A reference 1.024MHz

oscillator uses an external clock or Xtal.

The FX619 is a low-power, 5 volt CMOS

device and is available in 22-pin cerdip DIL,

24-lead/pin plastic and 28-lead ceramic

leadless SMT packages.

6.1

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