The DM74161N is a synchronous 4-bit binary counter from the 7400 series logic family manufactured by Texas Instruments (TI), formerly National Semiconductor. This integrated circuit (IC) is designed for applications requiring high-speed counting and digital control.

Applications:

• Frequency dividers in communication systems
• Address generation in memory systems
• Sequence generators for digital control systems
• Event counters in industrial automation
• Timing circuits in digital clocks and timers

Features:

• Synchronous counting operation for predictable behavior
• Asynchronous clear input for immediate reset
• Carry output for cascading multiple counters
• Count enable inputs for conditional counting
• 4-bit binary output for direct interfacing with other digital circuits

Benefits:

• High-speed counting enables real-time control
• Synchronous operation simplifies system design
• Asynchronous clear provides quick reset capability
• Cascading capability allows for creating larger counters
• Reliable performance ensures consistent operation

Additional Details:

The DM74161N operates with a positive-edge triggered clock, meaning the counter increments on the rising edge of the clock signal. The asynchronous clear input allows the counter to be reset to zero regardless of the clock signal. The carry output is asserted when the counter reaches its maximum value (15), enabling cascading of multiple DM74161N devices to create larger counters. The count enable inputs (ENT and ENP) must be asserted high for the counter to increment on each clock pulse. This IC is widely used in various digital logic circuits due to its versatility and ease of integration. It is typically housed in a 16-pin DIP (Dual In-line Package).