SEMICONDUCT OR

5-107

March 1997

HD-6402/883

CMOS Universal Asynchronous

Receiver Transmitter (UART)

Features

• This Circuit is Processed in Accordance to MIL-STD-

883 and is Fully Conformant Under the Provisions of

Paragraph 1.2.1.

• 8.0MHz Operating Frequency (HD-6402/883B)

• 2.0MHz Operating Frequency (HD-6402/883R)

• Low Power CMOS Design

• Programmable Word Length, Stop Bits and Parity

• Automatic Data Formatting and Status Generation

• Compatible with Industry Standard UARTs

• Single +5V Power Supply

• CMOS/TTL Compatible Inputs

Description

The HD-6402/883 is a CMOS UART for interfacing comput-

ers or microprocessors to an asynchronous serial data chan-

nel. The receiver converts serial start, data, parity and stop

bits. The transmitter converts parallel data into serial form

and automatically adds start, parity and stop bits. The data

word length can be 5, 6, 7 or 8 bits. Parity may be odd or

even. Parity checking and generation can be inhibited. The

stop bits may be one or two or one and one-half when trans-

mitting 5-bit code.

The HD-6402/883 can be used in a wide range of applica-

tions including modems, printers, peripherals and remote

data acquisition systems. Utilizing the Harris advanced

scaled SAJI IV CMOS process permits operation clock fre-

quencies up to 8.0MHz (500K Baud). Power requirements,

by comparison, are reduced from 300mW to 10mW. Status

logic increases flexibility and simplifies the user interface.

Pinout

HD-6402/883 (CERDIP)

TOP VIEW

Ordering Information

PACKAGE

TEMPERATURE RANGE

2MHz = 125K BAUD

8MHz = 500K BAUD

PKG. NO.

CERDIP

HD1-6402R/883

HD1-6402B/883

F40.6

13

1

2

3

4

5

6

7

8

9

10

11

12

14

15

16

17

18

19

20

VCC

NC

GND

RRD

RBR8

RBR7

RBR6

RBR5

RBR4

RBR3

RBR2

RBR1

PE

FE

OE

SFD

RRC

DRR

DR

RRI

28

40

39

38

37

36

35

34

33

32

31

30

29

27

26

25

24

23

22

21

TRC

EPE

CLS1

CLS2

SBS

PI

CRL

TBR8

TBR7

TBR6

TBR5

TBR4

TBR3

TBR2

TBR1

TRO

TRE

TBRL

TBRE

MR

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

Copyright

File Number

2953.1