TL/F/9488
54F/74F169
4-Stage
Synchronous
Bidirectional
Counter
November 1994
54F/74F169
4-Stage Synchronous Bidirectional Counter
General Description
The ’F169 is a fully synchronous 4-stage up/down counter.
The ’F169 is a modulo-16 binary counter. Features a preset
capability for programmable operation, carry lookahead for
easy cascading and a U/D input to control the direction of
counting. All state changes, whether in counting or parallel
loading, are initiated by the LOW-to-HIGH transition of the
clock.
Features
Y
Asynchronous counting and loading
Y
Built-in lookahead carry capability
Y
Presettable for programmable operation
Commercial Military
Package
Package Description
Number
74F169PC N16E 16-Lead (0.300 Wide) Molded Dual-In-Line
54F169DM (Note 2) J16A 16-Lead Ceramic Dual-In-Line
74F169SC (Note 1) M16A 16-Lead (0.150 Wide) Molded Small Outline, JEDEC
74F169SJ (Note 1) M16D 16-Lead (0.300 Wide) Molded Small Outline, EIAJ
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.
Logic Symbols
TL/F/9488–3
IEEE/IEC
’F169
TL/F/9488–9
TRI-STATE is a registered trademark of National Semiconductor Corporation.
C
1995 National Semiconductor Corporation RRD-B30M75/Printed in U. S. A.