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SN74F161A SYNCHRONOUS 4-BIT BINARY COUNTER

SN74F161A Description

SN74F161A SYNCHRONOUS 4-BIT BINARY COUNTER SDFS056B * MARCH 1987 * REVISED AUGUST 2001 D Internal Look-Ahead Circuitry for Fast Coun.
This synchronous, presettable, 4-bit binary counter has internal carry look-ahead circuitry for use in high-speed counting designs.

SN74F161A Features

* a fully independent clock circuit. Changes at ENP, ENT, or LOAD that modify the operating mode have no effect on the contents of the counter until clocking occurs. The function of the counter (whether enabled, disabled, loading, or counting) is dictated solely by the conditions meeting the setup and

SN74F161A Applications

* without additional gating. This function is implemented by the ENP and ENT inputs and an RCO output. Both ENP and ENT must be high to count, and ENT is fed forward to enable RCO. RCO, thus enabled, produces a high-logic-level pulse while the count is 15 (HHHH). The high-logic-level overflow ripple-

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SYNCHRONOUS 4-BIT BINARY COUNTER Texas Instruments
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