54F191DM Datasheet, PDF (1/10 Pages) National Semiconductor (TI) – Up/Down Binary Counter with Preset and Ripple Clock

November 1994
54F 74F191
Up Down Binary Counter with Preset and Ripple Clock
General Description
The ’F191 is a reversible modulo-16 binary counter featur-
ing synchronous counting and asynchronous presetting
The preset feature allows the ’F191 to be used in program-
mable dividers The Count Enable input the Terminal Count
output and Ripple Clock output make possible a variety of
methods of implementing multistage counters In the count-
ing 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
74F191PC
74F191SC (Note 1)
74F191SJ (Note 1)
Military
54F191DM (Note 2)
54F191FM (Note 2)
54F191LM (Note 2)
Package
Number
N16E
J16A
M16A
M16D
W16A
E20A
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 (0 300 Wide) Molded Small Outline EIAJ
16-Lead Cerpack
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
Connection Diagrams
Pin Assignment for
DIP SOIC and Flatpak
Pin Assignment
for LCC
IEEE IEC
TL F 9495–1
TL F 9495 – 2
TL F 9495 – 3
TL F 9495–4
TRI-STATE is a registered trademark of National Semiconductor Corporation
C1995 National Semiconductor Corporation TL F 9495
RRD-B30M75 Printed in U S A