SN74ALS191A counter equivalent, synchronous 4-bit up/down binary counter.
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PRODUCTION D.
SN54ALS191A . . . J PACKAGE SN74ALS191A . . . D OR N PACKAGE
(TOP VIEW)
B1
QB 2 QA 3 CTEN 4
D/U 5
QC 6 QD 7 GND 8
16 VCC 15 A 14 CLK 13 RCO 12 MAX/MIN 11 LOAD 10 C 9D
The ’ALS191A are synchronous 4-bit reversible up/down binary counters. Synchron.
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