The74LS161 is a high-speed synchronous 4-bit binary counter IC from the 74LS logic family. It features synchronous counting, parallel load, asynchronous reset, and enable control inputs, making it ideal for use in frequency division, event counting, and digital clock or timer applications.

Unlike asynchronous counters, all internal operations in the 74LS161 are synchronized with the clock input, which ensures reliable and glitch-free output transitions. It comes in a standard DIP-16 through-hole package, making it suitable for breadboarding and DIY projects.

Features of 74LS161 Synchronous 4-Bit Counter IC:

1. Synchronous 4-bit binary counter
2. Clear (asynchronous reset) and Load (parallel data entry) inputs
3. Enable inputs for flexible control (Enable T and Enable P)
4. Ripple carry output for cascading multiple counters
5. Fast switching performance with TTL compatibility
6. Standard DIP-16 package for easy prototyping

Specifications of 74LS161 IC:

• Model: 74LS161
• Function: 4-bit binary synchronous counter
• Operating Voltage: 4.75V 5.25V (nominal 5V)
• Clock Frequency: Up to 25 MHz (typical)
• Input Logic Level: TTL Compatible
• Package Type: DIP-16 Through-Hole
• Propagation Delay: ~20ns (typical)
• Operating Temperature: 0C to +70C

Package Includes:

1 74LS161 Synchronous 4-Bit Binary Counter IC – DIP-16 Package