1 Features
• Internal look-ahead for fast counting
• Carry output for n-bit cascading
• Synchronous counting
• Synchronously programmable
• SCR-latchup-resistant CMOS process and circuit
design
• Exceeds 2kV ESD protection per MIL-STD-883,
method 3015

2 Description
The ’AC161 devices are 4-bit binary counters.
These synchronous, presettable counters feature an
internal carry look-ahead for application in high-speed
counting.