S E M I C O N D U C T O R
HD-6402/883
CMOS Universal Asynchronous
Receiver Transmitter (UART)
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.
March 1997
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
Ordering Information
PACKAGE
CERDIP
TEMPERATURE RANGE
-55
o
C to +125
o
C
2MHz = 125K BAUD
HD1-6402R/883
8MHz = 500K BAUD
HD1-6402B/883
PKG. NO.
F40.6
Pinout
HD-6402/883 (CERDIP)
TOP VIEW
VCC
NC
GND
RRD
RBR8
RBR7
RBR6
RBR5
RBR4
RBR3
RBR2
RBR1
PE
FE
OE
SFD
RRC
DRR
DR
RRI
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
40 TRC
39 EPE
38 CLS1
37 CLS2
36 SBS
35 PI
34 CRL
33 TBR8
32 TBR7
31 TBR6
30 TBR5
29 TBR4
28 TBR3
27 TBR2
26 TBR1
25 TRO
24 TRE
23 TBRL
22 TBRE
21 MR
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
Copyright
©
Harris Corporation 1997
File Number
2953.1
5-107
HARRIS [ HARRIS CORPORATION ]
