SNJ54BCT646JT

Overview

The SNJ54BCT646JT is a military-grade octal bus transceiver and register featuring three-state outputs, manufactured by Texas Instruments. It operates within a supply voltage range of 4.5 V to 5.5 V, with a nominal voltage of 5 V. The device utilizes a ceramic dual in-line package (CDIP) with 24 terminals, designed for high reliability in harsh environments. It supports bidirectional data transfer between buses and internal registers, incorporating direction control and output enable functions. The component is rated for an operating temperature range from -55 °C to 125 °C, ensuring stability under extreme thermal conditions typical of military applications.

Feature Summary

• Octal bus transceiver architecture with registered outputs for stable data latching
• Three-state outputs allowing direct connection to system buses without external drivers
• Bidirectional data flow capability controlled by a dedicated direction input pin
• Military-grade construction using glass-sealed ceramic packaging for environmental resilience

Applications

• Military avionics data bus interfaces requiring radiation and vibration tolerance
• High-reliability industrial control systems operating in extreme temperatures
• Aerospace communication modules needing registered bus buffering
• Defense electronics where long-term stability and low power consumption are critical

Procurement Notes

Verify the complete part number including the J suffix and JT package code against official Texas Instruments documentation to ensure correct military grade and ceramic DIP specifications. Confirm that the source provides valid traceability and quality certifications required for defense procurement. Check for any specific handling instructions related to the ceramic package integrity during storage and installation.

Selection Notes

Select this component when designing systems that require octal width bus interfacing with registered outputs in a military environment. It is suitable for applications demanding bidirectional data transfer with precise timing control. Consider the CDIP package constraints for board layout and verify compatibility with existing 5 V logic families. Ensure the design accounts for the specific direction control and enable signal requirements defined in the datasheet.

Part Context

This device belongs to the BCT series of bus transceivers, which combines BiCMOS technology for low power consumption with TTL-compatible input levels. The SNJ prefix indicates a military-grade version produced under strict quality controls. The SN54BCT646 family offers high-speed performance suitable for complex digital systems, providing a robust solution for data routing in critical infrastructure.

Replacement Considerations

Compatible substitutes include SN54BCT646 variants with different package options or SN54ABT646 for higher speed requirements. Verify pinout compatibility and electrical characteristics before substitution. Ensure the replacement maintains the same military qualification level and ceramic package type if environmental resistance is required.