M38510/30905BEA

Overview

The M38510/30905BEA is a military-grade 8-line-to-1-line data selector/multiplexer manufactured by Texas Instruments. It belongs to the SN54LS251 series, utilizing Low-Power Schottky (LS) TTL technology for high-speed performance with reduced power consumption. The component is housed in a 16-pin Ceramic Dual In-Line Package (CDIP). It operates within an extended temperature range of -55°C to +125°C and requires a nominal 5V supply voltage.

Feature Summary

• Provides eight independent data input channels selectable via three address lines
• Features active-low output enabled by a dedicated strobe control pin
• Constructed using Low-Power Schottky silicon gate technology
• Designed for high reliability in harsh environments through ceramic packaging

Applications

• Military communication systems requiring robust signal routing
• Avionics data bus multiplexing architectures
• Defense electronics operating under extreme thermal conditions
• High-reliability industrial control logic circuits

Procurement Notes

Verify that the received unit matches the exact part number M38510/30905BEA and confirms QML certification status. Ensure the package is genuine CDIP-16 ceramic construction. Confirm compliance with MIL-M-38510 Class B or equivalent specifications. Validate lot traceability and screening levels required for defense applications before integration into critical systems.

Selection Notes

Select this component when designing systems that demand high noise immunity and low power dissipation in extreme temperatures. It serves as a direct replacement for commercial SN74LS251 variants where environmental ruggedness is mandatory. Consider the LS family speed-power trade-offs against standard TTL requirements for system timing budgets.

Part Context

This device is part of the SN54LS251 family, which defines the functional logic for 8-to-1 multiplexers. The M38510/30905BEA designation specifically denotes the military qualification variant produced under government standards. It shares logical functionality with commercial counterparts but differs significantly in manufacturing controls, material selection, and environmental testing protocols.

Replacement Considerations

SNJ54LS251J

FAQ

What is the specific logic function of the M38510/30905BEA?

It functions as an 8-line-to-1-line data selector or multiplexer, allowing one of eight inputs to be routed to a single output based on address inputs.

How does the enable pin operate on this device?

The device features an active-low enable input; the multiplexer output is disabled (high-impedance state) when this pin is held high.