SN74161D

Counter Dividers Overview

The SN74161D is a synchronous 4-bit binary counter from the Texas Instruments 74LS series. It features parallel data loading, asynchronous master reset, and ripple clock outputs. The device operates on a single 5V supply with a voltage range of 4.75V to 5.25V. Key electrical parameters include a maximum propagation delay of 30ns at 5V and a count rate of up to 35MHz. It provides high-level output current of -0.4mA and low-level output current of 8mA. The component is housed in a 16-SOIC package and supports an operating temperature range of 0°C to 70°C.

Counter Dividers Feature Summary

• Synchronous four-bit binary counting with internal carry lookahead for high-speed operation
• Asynchronous master reset that clears all flip-flops independently of the clock signal
• Parallel data input capability allows direct loading of specific binary values into the counter

Counter Dividers Applications

• Digital frequency division circuits
• Sequential pulse generation systems
• Timing control logic in industrial equipment

Counter Dividers Procurement Notes

Verify the exact suffix against the manufacturer's official datasheet to confirm package type and temperature grade. Confirm RoHS compliance status as manufacturing processes evolve. Check for obsolescence notices or product change notifications prior to final design approval. Ensure the supplier source is authorized to guarantee component authenticity and traceability.

Counter Dividers Selection Notes

Select this component when synchronous counting with parallel load functionality is required in standard TTL logic environments. Compare propagation delays and power consumption against alternative logic families if speed or efficiency is critical. Verify that the 16-pin SOIC package fits the available PCB footprint and assembly constraints.

Counter Dividers Part Context

This part belongs to the widely used 7400-series digital logic family, specifically the LS (Low-power Schottky) variant. It serves as a fundamental building block for sequential logic designs requiring reliable binary counting. The SN74161D is a specific package variation of the general SN74161 functional specification.

Counter Dividers Replacement Considerations

SN74LS161DR is a documented equivalent offering identical logical functionality in a tape-and-reel packaging format.