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74LS161 - Synchronous 4-Bit Counters

74LS161 Description

SL74LS161 Synchronous 4 Bit Counters; Binary, Direct Reset This synchronous, presettable counter .

74LS161 Applications

* without additional gating. Instrumental in accomplishiing this function are two counter-enable inputs and a ripple carry output. Both countenable inputs (ENABLE P and ENABLE T) must be high to count, and ENABLE T is fed forward to enable the ripple carry output. The ripple carry output thus enabled

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Synchronous 4-Bit Counters System Logic Semiconductor
System Logic Semiconductor 74LS161-like datasheet