SN74LS161A Description
BCD DECADE COUNTERS/ 4-BIT BINARY COUNTERS The LS160A / 161A / 162A / 163A are high-speed 4-bit synchronous counters.They are edge-triggered, synchr.
The LS160A / 161A / 162A / 163A are 4-bit synchronous counters with a synchronous Parallel Enable (Load) feature.
SN74LS161A Features
* 163A
AC SETUP REQUIREMENTS (TA = 25°C)
Symbol
Parameter
tWCP
Clock Pulse Width Low
tW MR or SR Pulse Width
ts Setup Time, other
* ts Setup Time PE or SR
th Hold Time, data
th Hold Time, other
trec Recovery Time MR to CP
* CEP, CET or DATA
Limits Min Typ Max 25 20 20 25
3 0 15
Uni
SN74LS161A Applications
* The LS160A and LS162A count modulo 10 (BCD). The LS161A and LS163A count modulo 16 (binary. )
The LS160A and LS161A have an asynchronous Master Reset (Clear) input that overrides, and is independent of, the clock and all other control inputs. The LS162A and LS163A have a Synchronous Reset (Clear) in
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