SNJ54LS393FK

Counter Dividers Overview

The SNJ54LS393FK is a military-grade dual 4-bit binary and decade counter from the Texas Instruments LS series. It features asynchronous operation with negative-edge triggering for both counters. The device is housed in a 20-pin LCCC (FK) ceramic package designed for high reliability. It operates within an extended temperature range of -55°C to 125°C. The component supports standard TTL logic levels and includes dedicated clock inputs for independent control of each 4-bit counter section.

Counter Dividers Feature Summary

• Dual independent 4-bit counting sections supporting both binary and decade modes
• Asynchronous negative-edge triggered clocking mechanism
• Hermetically sealed ceramic LCCC packaging for environmental durability
• Qualified for military and defense applications under QML standards

Counter Dividers Applications

• Military and defense electronic systems
• Space-based application environments
• High-reliability industrial timing circuits

Counter Dividers Procurement Notes

Verify that the specific part number matches the required military qualification standards. Confirm the LCCC package type aligns with the target PCB footprint. Ensure the operating temperature range meets the environmental requirements of the final assembly. Check for any specific handling instructions related to hermetic ceramic packages during installation.

Counter Dividers Selection Notes

Select this component when military-grade reliability and radiation tolerance are required. The LS family offers standard power consumption characteristics suitable for general-purpose logic applications. Consider the LCCC package for superior thermal and mechanical performance compared to plastic variants. Verify compatibility with existing system voltage levels and clock frequencies.

Counter Dividers Part Context

This component belongs to the SN54LS39x family, which includes the SN54LS390 and SN54LS393. These devices are standardized dual counters widely used in digital logic design. The SNJ prefix indicates a military-qualified version manufactured by Texas Instruments. The FK suffix specifically denotes the 20-pin LCCC ceramic package configuration.

Counter Dividers Replacement Considerations

SNJ54LS390FK serves as a functional alternative if decade counting is preferred over binary counting. SN74LS393 variants offer commercial-grade options but lack military qualification. Cross-reference pinouts and electrical specifications before substituting to ensure circuit compatibility.