TL/F/9494
54F/74F190
Up/Down
Decade
Counter
with
Preset
and
Ripple
Clock
November 1994
54F/74F190
Up/Down Decade Counter with Preset and Ripple Clock
General Description
The ’F190 is a reversible BCD (8421) decade counter fea-
turing synchronous counting and asynchronous presetting.
The preset feature allows the ’F190 to be used in program-
mable dividers. The Count Enable input, the Terminal Count
output and the Ripple Clock output make possible a variety
of methods of implementing multistage counters. In the
counting modes, state changes are initiated by the rising
edge of the clock.
Features
Y
High-speed—125 MHz typical count frequency
Y
Synchronous counting
Y
Asynchronous parallel load
Y
Cascadable
Commercial Military
Package
Package Description
Number
74F190PC N16E 16-Lead (0.300 Wide) Molded Dual-In-Line
54F190DM (Note 2) J16A 16-Lead Ceramic Dual-In-Line
74F190SC (Note 1) M16A 16-Lead (0.150 Wide) Molded Small Outline, JEDEC
54F190FM (Note 2) W16A 16-Lead Cerpack
54F190LM (Note 2) E20A 20-Lead Ceramic Leadless Chip Carrier, Type C
Note 1: Devices also available in 13 reel. Use suffix e SCX.
Note 2: Military grade device with environmental and burn-in processing. Use suffix e DMQB, FMQB and LMQB.
Logic Symbols Connection Diagrams
TL/F/9494–1
IEEE/IEC
TL/F/9494–4
Pin Assignment for
DIP, SOIC and Flatpak
TL/F/9494–2
Pin Assignment
for LCC
TL/F/9494–3
TRI-STATE is a registered trademark of National Semiconductor Corporation.
C
1995 National Semiconductor Corporation RRD-B30M75/Printed in U. S. A.