TL/F/9516
54F/74F322
Octal
Serial/Parallel
Register
with
Sign
Extend
May 1995
54F/74F322
Octal Serial/Parallel Register with Sign Extend
General Description
The ’F322 is an 8-bit shift register with provision for either
serial or parallel loading and with TRI-STATE parallel out-
puts plus a bi-state serial output. Parallel data inputs and
parallel outputs are multiplexed to minimize pin count. State
changes are initiated by the rising edge of the clock. Four
synchronous modes of operation are possible: hold (store),
shift right with serial entry, shift right with sign extend and
parallel load. An asynchronous Master Reset (MR) input
overrides clocked operation and clears the register.
Features
Y
Multiplexed parallel I/O ports
Y
Separate serial input and output
Y
Sign extend function
Y
TRI-STATE outputs for bus applications
Commercial Military
Package
Package Description
Number
74F322PC N20A 20-Lead (0.300 Wide) Molded Dual-In-Line
54F322DM (Note 2) J20A 20-Lead Ceramic Dual-In-Line
74F322SJ (Note 1) M20D 20-Lead (0.300 Wide) Molded Small Outline, EIAJ
54F322FM (Note 2) W20A 20-Lead Cerpack
54F322LM (Note 2) E20A 20-Lead Ceramic Leadless Chip Carrier, Type C
Note 1: Devices also available in 13 reel. Use suffix e SJX.
Note 2: Military grade device with environmental and burn-in processing. Use suffix e DMQB, FMQB and LMQB.
Logic Symbols
TL/F/9516–3
IEEE/IEC
TL/F/9516–5
TRI-STATE is a registered trademark of National Semiconductor Corporation.
C
1995 National Semiconductor Corporation RRD-B30M105/Printed in U. S. A.