July 1987
MM82PC12 8-Bit Input/Output Port
General Description
Features
Y
Y
Y
Y
Y
Y
Y
Y
Drive capabilityÐ150 pF load
The MM82PC12 is a microCMOS 8-bit input/output port
contained in a standard 24-pin dual-in-line package. The
MM82PC12 can be used to implement latches, gated buff-
ers, or multiplexers. Thus, all of the major peripheral and
input/output functions of a microcomputer system can be
implemented with this device.
High noise immunity
Low power dissipation
Full interface to CMOS logic levels
microCMOS technology
e
TTL drive capability when V
8-bit data latch and buffer
5V
CC
The MM82PC12 includes an 8-bit latch with TRI-STATE
É
output buffers, and device selection and control logic. Also
included is a service request flip-flop for the generation and
control of interrupts to the microprocessor.
Service request flip-flop for generation and control of
interrupts
Y
Y
1 mA input load current
The MM82PC12 is pinout and function compatible with stan-
dard INS8212 and DP8212 devices.
Reduces system package count by replacing buffers,
latches, and multiplexers in microcomputer systems
For military applications, the MM82PC12 is available with
class B screening in accordance with method 5004 of MIL-
STD-883.
System Configuration
TL/C/5596–1
TRI-STATEÉ is a registered trademark of National Semiconductor Corp.
C
1995 National Semiconductor Corporation
TL/C/5596
RRD-B30M105/Printed in U. S. A.