SNJ54AS873AJT

Overview

The SNJ54AS873AJT is a high-speed logic integrated circuit manufactured by Texas Instruments, belonging to the AS series. It functions as a dual 4-bit D-type transparent latch with tri-state outputs. The device is housed in a 24-lead ceramic dual in-line package (CDIP) designed for military-grade reliability and extended temperature operation. Key electrical specifications include a supply voltage range of 4.5V to 5.5V and an operating temperature range from -55°C to +125°C. The component features a propagation delay of 8ns, with output currents specified at 2.6mA for high state and 24mA for low state.

Feature Summary

• Dual independent 4-bit D-type transparent latches providing flexible data storage capabilities
• Tri-state outputs allowing direct bus interfacing and system line driving
• Military-grade construction utilizing ceramic glass-sealed packaging for harsh environment durability

Applications

• Military aerospace computing systems requiring extended temperature tolerance
• High-speed digital data acquisition and storage circuits
• Industrial control systems utilizing parallel bus architectures

Procurement Notes

Verify the specific suffix 'JT' against official manufacturer documentation to confirm the exact pinout configuration and lead finish specifications. Ensure that the procurement source provides traceability certificates appropriate for military-grade components. Cross-reference the part number with the latest Texas Instruments datasheet to confirm current production status and any potential obsolescence notices before finalizing orders.

Selection Notes

Select this component when designing systems that require robust data latching under extreme environmental conditions. The AS series offers faster switching speeds compared to standard LS logic families. Consider the CDIP package constraints regarding board space and thermal management. Verify that the system power supply strictly adheres to the 4.5V to 5.5V range to ensure reliable operation and prevent damage to the internal circuitry.

Part Context

This component is part of the broader Texas Instruments 54AS logic family, which is engineered for high-performance applications. The 54-series designation indicates military qualification standards, distinguishing it from commercial 74-series counterparts. The AS technology combines the speed of ALS logic with enhanced drive capabilities, making it suitable for complex digital logic designs where timing precision and environmental resilience are critical requirements.

Replacement Considerations

Direct replacements may include other variants within the 54AS873 family or compatible 74ALS873 devices if military specifications are not mandatory. Verify pin compatibility and electrical characteristics carefully. Consult official substitution guides for any functional differences between ceramic and plastic package versions.