* Y Counts 8-4-2-1 BCD or binary Y Single down up count control line Y Count enable control input Y Ripple clock output for cascading Y Asynchronously presettable with load control Y Parallel outputs Y Cascadable for n-bit applications Y Average propagation delay 20 ns Y Typical clock frequency 25 MHz
DM74LS191 Datasheet (125.07 KB)
DM74LS191
National Semiconductor
125.07 KB
Synchronous 4-bit up/down counters.
DM54LS190 DM74LS190 DM54LS191 DM74LS191 Synchronous 4-Bit Up Down Counters with Mode Control
May 1989
DM54LS190 DM74LS190 DM54LS191 DM74LS191 Synchr.
📁 Related Datasheet
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DM54LS190 DM74LS190 DM54LS191 DM74LS191 Synchronous 4-Bit Up Down Counters with Mode Control
May 1989
DM54LS190 DM74LS190 DM54LS191 DM74LS191 Synchr.
DM74LS191 - Synchronous 4-Bit Up/Down Counter
(Fairchild Semiconductor)
DM74LS191 Synchronous 4-Bit Up/Down Counter with Mode Control
August 1986 Revised February 1999
DM74LS191 Synchronous 4-Bit Up/Down Counter with Mod.
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(National Semiconductor)
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DM74LS193 - Synchronous 4-Bit Binary Counter
(Fairchild Semiconductor)
DM74LS193 Synchronous 4-Bit Binary Counter with Dual Clock
September 1986 Revised March 2000
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DM74LS194A - 4-Bit Bidirectional Universal Shift Register
(National Semiconductor)
54LS194A DM74LS194A 4-Bit Bidirectional Universal Shift Register
June 1989
54LS194A DM74LS194A 4-Bit Bidirectional Universal Shift Register
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DM74LS194A - 4-Bit Bidirectional Universal Shift Register
(Fairchild Semiconductor)
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August 1986 Revised March 2000
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DM74LS196 - PRESETTABLE DECADE COUNTER
(National Semiconductor)
.
DM74LS197 - Presettable Binary Counters
(National Semiconductor)
DM74LS197 Presettable Binary Counters
February 1992
DM74LS197 Presettable Binary Counters
General Description
The ’LS197 ripple counter contains div.
