CD54AC161, CD74AC161 4-BIT SYNCHRONOUS BINARY COUN.
Texas Instruments
CD74AC161 - 4-BIT SYNCHRONOUS BINARY COUNTERS
CD54AC161, CD74AC161 4-BIT SYNCHRONOUS BINARY COUNTERS SCHS239C – SEPTEMBER 1998 – REVISED MARCH 2003 D Internal Look-Ahead for Fast Counting D Carr.