SNJ54HC253FK

Signal Switches, Multiplexers, Decoders Overview

The SNJ54HC253FK is a military-grade dual 4-line to 1-line data selector/multiplexer featuring 3-state outputs, manufactured by Texas Instruments. It operates within a supply voltage range of 2 V to 6 V and supports an extended temperature range from -55 °C to 125 °C. The device utilizes a 20-pin Leadless Ceramic Chip Carrier (LCCC) package with dimensions of 8.89 mm x 8.45 mm. Electrical characteristics include a maximum propagation delay of 355 ns at 2 V with 150 pF load, typical low power consumption of 80 μA, and high-current inverting outputs capable of driving up to 15 LSTTL loads.

Signal Switches, Multiplexers, Decoders Feature Summary

• Dual independent multiplexers with full binary decoding for selecting one of four data sources
• Strobe-controlled 3-state outputs allowing direct bus interface without external buffers
• Wide operating voltage range supporting 2 V to 6 V supply rails
• High-current inverting outputs designed to drive multiple LSTTL loads

Signal Switches, Multiplexers, Decoders Applications

• Bus-oriented systems requiring data routing and selection
• Parallel-to-serial data conversion circuits
• Multiplexing applications connecting multiple signal lines to a single output path

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific ordering suffix FK corresponds to the 20-pin LCCC package configuration. Confirm that the military grade designation aligns with project requirements for extended temperature operation and reliability standards. Ensure compatibility with existing board layouts utilizing ceramic leadless carriers.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when military-grade environmental tolerance and wide voltage operation are required. The 3-state output capability simplifies bus design by eliminating the need for external buffer drivers. Consider the LCCC package constraints regarding thermal management and PCB footprint availability compared to standard plastic packages.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the SNx4HC253 family of dual 4-line to 1-line multiplexers. It serves as the military-grade equivalent to commercial variants like the SN74HC253. The 'SNJ' prefix indicates a hermetically sealed ceramic package suitable for harsh environments, while the 'FK' suffix specifies the 20-pin LCCC form factor.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Direct functional substitutes include other SN54HC253 variants in different packages such as CDIP or SOIC. Commercial equivalents like SN74HC253 offer identical logic functions but lack the extended temperature range and hermetic sealing.