Internal Look-Ahead for Fast Counting
Carry Output for n-Bit Cascading
Synchronous Counting
Synchronously Programmable

Load Control Line

Diode-Clamped Inputs

description

These synchronous, presettable counters feature an in
ternal carry look-ahead for application in high-speed
counting designs. The '160,"162,"LS160A, LS1624,
and "$162 are decade counters and the
161,163, LS161A,(S163A, and ‘S163 are 4-bit
binary counters. Synchronaus aperation is provided by
having all flip-flops clocked simultaneously so that the.
outputs change coincident with each other when so in-
structed by the count-enable inputs and internal gating.
“This mode of operation eliminates the output counting
spikes that are normaly associated with asynchronous
ripple clock) counters, however counting spikes may
occur on the (RCO) ripple carry output. A buffered clock
input wriggegs the four fp flops on the rising edge of the
clock input waveform.