TL/F/9515
54F/74F299
Octal
Universal
Shift/Storage
Register
with
Common
Parallel
I/O
Pins
May 1995
54F/74F299 Octal Universal Shift/Storage Register
with Common Parallel I/O Pins
General Description
The ’F299 is an 8-bit universal shift/storage register with
TRI-STATE outputs. Four modes of operation are possi-
ble: hold (store), shift left, shift right and load data. The par-
allel load inputs and flip-flop outputs are multiplexed to re-
duce the total number of package pins. Additional outputs,
Q
0
–Q
7
, are provided to allow easy serial cascading. A sep-
arate active LOW Master Reset is used to reset the register.
Features
Y
Common parallel I/O for reduced pin count
Y
Additional serial inputs and outputs for expansion
Y
Four operating modes: shift left, shift right, load and
store
Y
TRI-STATE outputs for bus-oriented applications
Y
Guaranteed 4000V minimum ESD protection
Commercial Military
Package
Package Description
Number
74F299PC N20A 20-Lead (0.300 Wide) Molded Dual-In-Line
54F299DM (Note 2) J20A 20-Lead Ceramic Dual-In-Line
74F299SC (Note 1) M20B 20-Lead (0.300 Wide) Molded Small Outline, JEDEC
74F299SJ (Note 1) M20D 20-Lead (0.300 Wide) Molded Small Outline, EIAJ
54F299FM (Note 2) W20A 20-Lead Cerpack
54F299LM (Note 2) E20A 20-Lead Ceramic Leadless Chip Carrier, Type C
Note 1: Devices also available in 13 reel. Use suffix e SCX and SJX.
Note 2: Military grade device with environmental and burn-in processing. Use suffix e DMQB, FMQB and LMQB.
Logic Symbols
TL/F/9515–1
IEEE/IEC
TL/F/9515–4
TRI-STATE is a registered trademark of National Semiconductor Corporation.
C
1995 National Semiconductor Corporation RRD-B30M75/Printed in U. S. A.