SNJ54ALS191AJ

Counter Dividers Overview

The SNJ54ALS191AJ is a military-grade synchronous 4-bit reversible up/down binary counter from Texas Instruments. It operates within the full military temperature range of -55°C to 125°C and utilizes ALS logic technology. The device features fully synchronous counting, asynchronous preset capability via the LOAD control, and look-ahead circuitry for cascaded applications. It is housed in a 16-pin ceramic dual in-line package (CDIP) designed for high-reliability environments.

Counter Dividers Feature Summary

• Synchronous operation with simultaneous flip-flop clocking eliminates output counting spikes
• Asynchronously programmable preset allows immediate data loading independent of clock state
• Look-ahead circuitry enhances speed when cascading multiple counters
• Buffered control inputs reduce drive requirements on clock drivers

Counter Dividers Applications

• Military and defense electronic systems requiring extended temperature tolerance
• High-speed digital counters utilizing look-ahead cascading techniques
• Modulo-N frequency dividers configured through preset inputs
• Avionics and aerospace instrumentation subject to harsh environmental conditions

Counter Dividers Procurement Notes

Verify that the specific ordering suffix matches the required package type, as the SNJ prefix denotes military-grade ceramic construction. Confirm RoHS exemption status if applicable to your manufacturing process. Ensure the component meets QML certification requirements for your specific program. Validate lead finish specifications against your assembly capabilities before finalizing procurement orders.

Counter Dividers Selection Notes

Select this component when military-qualified reliability and wide operating temperature ranges are mandatory. The synchronous design prevents ripple-clock glitches found in asynchronous counters. Consider the buffered control inputs for driving long parallel words efficiently. Verify that the CDIP package dimensions fit your board layout constraints compared to plastic or surface-mount alternatives.

Counter Dividers Part Context

This part belongs to the SN54ALS series, which provides advanced low-power Schottky logic performance for military applications. The 'J' suffix specifically identifies the 16-pin ceramic dual in-line package variant. It serves as the military counterpart to the commercial SN74ALS191A, sharing identical electrical functionality but adhering to stricter qualification standards.

Counter Dividers Replacement Considerations

SNJ54ALS191AFK: Ceramic chip carrier version. SNJ54ALS191AW: Ceramic flatpack version. SN54ALS191A: Generic military specification reference.