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 鈥橣190 is a reversible BCD (8421) decade counter fea-
turing synchronous counting and asynchronous presetting
The preset feature allows the 鈥橣190 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
Y
Y
Y
High-speed 125 MHz typical count frequency
Synchronous counting
Asynchronous parallel load
Cascadable
Commercial
74F190PC
Military
Package
Number
N16E
Package Description
16-Lead (0 300 Wide) Molded Dual-In-Line
16-Lead Ceramic Dual-In-Line
16-Lead (0 150 Wide) Molded Small Outline JEDEC
16-Lead Cerpack
20-Lead Ceramic Leadless Chip Carrier Type C
54F190DM (Note 2)
74F190SC (Note 1)
54F190FM (Note 2)
54F190LM (Note 2)
Note 1
Devices also available in 13 reel Use suffix
e
SCX
J16A
M16A
W16A
E20A
Note 2
Military grade device with environmental and burn-in processing Use suffix
e
DMQB FMQB and LMQB
Logic Symbols
Connection Diagrams
Pin Assignment for
DIP SOIC and Flatpak
Pin Assignment
for LCC
TL F 9494鈥?
IEEE IEC
TL F 9494 鈥?2
TL F 9494 鈥?3
TL F 9494鈥?
TRI-STATE is a registered trademark of National Semiconductor Corporation
C
1995 National Semiconductor Corporation
TL F 9494
RRD-B30M75 Printed in U S A