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CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

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CD22103A

CMOS HDB3 (High Density Bipolar 3)

Transcoder for 2.048/8.448Mb/s

Transmission Applications

The CD22103A is an LSI SOS integrated circuit which

performs the HDB3 transmission coding and reception

decoding functions with error detection. It is used in

2.048Mb/s and 8.448Mb/s transmission applications. The

CD22103A performs HDB3 coding and decoding for data

rates from 50Kb/s to 10Mb/s in a manner consistent with

CCITT G703 recommendations.

HDB3 transmission coding/reception decoding with code

error detection is performed in independent coder and

decoder sections. All transmitter and receiver inputs/outputs

are TTL compatible.

The HDB3 transmitter coder codes an NRZ binary unipolar

input signal (NRZ-IN) and a synchronous transmission clock

(CTX) into two HDB3 binary unipolar RZ output signals

(+HDB3 OUT, -HDB3 OUT). The TTL compatible output

signals +HDB3 OUT, -HDB3 OUT are externally mixed to

generate ternary bipolar HDB3 signals for driving

transmission lines.

The receiver decoder converts binary unipolar inputs

(+HDB3 IN, -HDB3 IN), which were externally split from

ternary bipolar HDB3 signals, and a synchronous clock

signal (CRX) into binary unipolar NRZ signals (NRZ-OUT).

The CD22103A operates with a 5V

±10% power supply

voltage over the full military temperature range at data rates

from 50Kb/s up to 10Mb/s.

Block Diagram

Features

• HDB3 Coding and Decoding for Data Rates from 50Kb/s

to 10Mb/s in a Manner Consistent with CCITT G703

Recommendations

• HDB3/AMI Transmission Coding/Reception Decoding with

Code Error Detection is Performed in Independent Coder

and Decoder Sections

• All Transmitter and Receiver Inputs/Outputs are TTL

Compatible

• Internal Loop Test Capability

• Pin and Functionally Compatible with Type MJ1471

Pinout

CD22103A (PDIP, SBDIP)

TOP VIEW

TRANSMITTER

CODER

RECEIVER

DECODER

AIS

DETECT

ERROR

DETECT

NRZ-IN

CTX

HDB3/AMI

NRZ-OUT

CRX

AIS

RAIS

LTE

CKR

ERR

+HDB3 OUT

-HDB3 OUT

+HDB3 IN

-HDB3 IN

ENCODER

IN

DECODER

REQUIRES CLOCK

RECOVERY CIRCUIT

Ordering Information

PART

NUMBER

TEMP. RANGE

PACKAGE

PKG. NO.

CD22103AD

-55 to 125

16 Ld SBDIP

D16.3

CD22103AE

-40 to 85

16 Ld PDIP

E16.3

14

15

16

9

13

12

11

10

1

2

3

4

5

7

6

8

NRZ-IN

CTX

HDB3/AMI

NRZ-OUT

CRX

AIS

LTE

CKR

ERR

+HDB3 OUT

-HDB3 OUT

+HDB3 IN

-HDB3 IN

RAIS

Data Sheet

January 1997

File Number

1310.3