Specifications
5-1
March 1997
HD-6402
CMOS Universal Asynchronous
Receiver Transmitter (UART)
Features
• 8.0MHz Operating Frequency (HD-6402B)
• 2.0MHz Operating Frequency (HD-6402R)
• 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 is a CMOS UART for interfacing computers or
microprocessors to an asynchronous serial data channel.
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 transmit-
ting 5-bit code.
The HD-6402 can be used in a wide range of applications
including modems, printers, peripherals and remote data
acquisition systems. Utilizing the Intersil advanced scaled
SAJI IV CMOS process permits operation clock frequencies
up to 8.0MHz (500K Baud). Power requirements, by compar-
ison, are reduced from 300mW to 10mW. Status logic
increases flexibility and simplifies the user interface.
Pinout
HD-6402 (PDIP, CERDIP)
TOP VIEW
Ordering Information
PACKAGE TEMPERATURE RANGE 2MHz = 125K BAUD 8MHz = 500K BAUD PKG. NO.
Plastic DIP -40
o
C to +85
o
C HD3-6402R-9 HD3-6402B-9 E40.6
CERDIP -40
o
C to +85
o
C HD1-6402R-9 HD1-6402B-9 F40.6
SMD# -55
o
C to +125
o
C 5962-9052501MQA 5962-9052502MQA F40.6
13
1
2
3
4
5
6
7
8
9
10
11
12
14
15
16
17
18
19
20
V
CC
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
File Number 2956.1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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