High-Speed CMOS 4-Bit Synchronous Counter

4-Bit Presettable Synchronous Binary Counter

The NTE74HC161 is a high-speed CMOS counter designed for reliable, accurate digital counting operations. This 4-bit presettable synchronous binary counter features asynchronous reset and load, supporting both up-count and parallel preset operations in a wide range of logic circuits.

Key Features and Benefits

• 4-bit synchronous binary counting for precision digital applications
• High-speed CMOS technology for fast switching and low power consumption
• Asynchronous master reset allows direct, immediate resetting of the counter outputs
• Presettable operation with parallel data inputs for flexible count initialization
• TTL-compatible inputs and outputs for straightforward interfacing with standard logic lines
• Advanced look-ahead carry logic for fast cascading in multi-stage counting designs

Technical Specifications

• Part Number: NTE74HC161
• Logic Family: High-Speed CMOS (HC)
• Function: 4-bit presettable synchronous binary counter with asynchronous reset and load
• Inputs: Parallel data, clock, master reset, load, enable
• Outputs: 4 parallel binary outputs (Q0–Q3), carry out
• Package: 1 piece per package

Typical Applications

• Digital counters in measurement and instrumentation systems
• Frequency division, event counting, and electronic timing circuits
• Binary counting stages in communications and control equipment
• Logic circuits requiring reliable, high-speed synchronous counting

Usage and Controls

The NTE74HC161 operates as a synchronous 4-bit binary counter, controlled by a positive-edge-triggered clock signal. Parallel data inputs allow presetting the counter to any desired value, while an asynchronous master reset allows rapid clearing of all count outputs. The device is also equipped with enable inputs and fast carry logic, making it ideal for cascading multiple units in high-speed digital systems.

This part is the equivalent replacement for the following:

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