JM38510/66302SEA

Counter Dividers Overview

The Texas Instruments JM38510/66302BEA is a military-grade SN54HC161 synchronous 4-bit binary counter housed in a 16-pin ceramic dual in-line package (CDIP). It operates within a supply voltage range of 2 V to 6 V and supports an operating temperature range from -55 °C to 125 °C. The device features internal carry look-ahead for high-speed cascading, asynchronous clear, and synchronous preset capabilities.

Counter Dividers Feature Summary

• Synchronous counting with simultaneous flip-flop clocking to eliminate output spikes
• Internal carry look-ahead circuitry for fast n-bit cascading without external gating
• Asynchronous clear function that sets all outputs low regardless of other inputs
• Synchronously programmable preset allowing data loading on the next clock pulse

Counter Dividers Applications

• High-speed binary counting designs requiring glitch-free operation
• n-bit cascaded counter systems utilizing internal carry look-ahead
• Military and aerospace electronic systems requiring extended temperature ranges
• Digital timing circuits requiring precise synchronous data loading

Counter Dividers Procurement Notes

Verify the specific ordering suffix BEA against current manufacturer documentation to confirm active production status and exact package specifications. Ensure procurement channels provide traceability consistent with MIL-PRF-38535 requirements for this military-grade component class.

Counter Dividers Selection Notes

Select this component when a 4-bit synchronous counter with military temperature ratings is required. The HC161 architecture provides faster counting speeds compared to standard TTL equivalents due to its CMOS technology and internal carry look-ahead logic.

Counter Dividers Part Context

This part number represents the military version of the SN54HC161 series. It shares identical logical functionality with commercial variants but utilizes a hermetically sealed ceramic package designed to withstand harsh environmental conditions and extended thermal cycles.

Counter Dividers Replacement Considerations

SNJ54HC161J

Counter Dividers FAQ

How does the internal carry look-ahead improve performance?

It allows multiple counters to be cascaded for n-bit applications without additional external gating, significantly reducing propagation delay compared to ripple-carry methods.

What is the behavior of the clear input?

The clear function is asynchronous; applying a low level to the clear input immediately sets all four flip-flop outputs low, independent of the clock or enable inputs.