The NTE74LS162A is a synchronous decade counter manufactured by NTE Electronics. It is a widely used component in digital logic circuits for counting and frequency division applications. It features synchronous operation, meaning that all flip-flops are clocked simultaneously, providing predictable and reliable counting.

Applications

• Frequency dividers
• Digital clocks and timers
• Event counters
• Address counters for memory systems
• Control circuits

Features

• Synchronous counting operation
• Internal look-ahead carry
• Asynchronous clear input
• Count enable inputs
• BCD decade counting sequence
• TTL compatible inputs and outputs
• 16-Pin DIP Package

Benefits

• Accurate and reliable counting due to synchronous operation
• High-speed operation due to look-ahead carry feature
• Easy reset capability with asynchronous clear input
• Flexible control with count enable inputs
• Direct BCD output for compatibility with displays and other BCD-based systems
• Simple integration into TTL circuits

Technical Specifications

The NTE74LS162A operates from a 5V power supply and features TTL-compatible inputs and outputs. It has a typical clock frequency of 25 MHz. The asynchronous clear input allows for immediate resetting of the counter, regardless of the clock signal. The count enable inputs provide control over whether the counter is actively counting. The internal look-ahead carry allows for high-speed cascading of multiple counters. The BCD decade counting sequence provides a direct binary-coded decimal output, which simplifies interfacing with displays and other BCD-based systems. The device is housed in a standard 16-pin DIP package for easy breadboarding and circuit prototyping.

The synchronous operation ensures that all flip-flops in the counter change state simultaneously on the rising edge of the clock signal. This eliminates timing skew and ensures accurate counting. The look-ahead carry logic speeds up the counting process by anticipating carry signals from previous stages. The asynchronous clear input provides a convenient way to reset the counter to zero.