M38510/33701B2A

Overview

The M38510/33701B2A is a military-grade 3-line to 8-line decoder/demultiplexer manufactured by Texas Instruments. It operates over the full military temperature range of –55°C to 125°C and requires a supply voltage (VCC) between 4.5 V and 5.5 V. The device features three enable inputs (one active-high, two active-low) to simplify cascading and data reception. It provides eight active-low outputs selected by binary inputs A, B, and C. Typical propagation delays are approximately 5 ns at VCC = 5 V with a 50 pF load.

Feature Summary

• Designed for high-speed memory decoding and data routing applications requiring short propagation delay times.
• Incorporates three enable inputs to simplify system expansion and demultiplexing functions without external inverters.
• Characterized for operation across the full military temperature range from –55°C to 125°C.

Applications

• High-performance memory decoding systems
• Data transmission and routing systems
• Demultiplexing applications

Procurement Notes

Verify that the component meets MIL-M-38510 specifications and QML certification requirements. Confirm the package type matches the design constraints, as this part number corresponds to the LCCC (FK) package variant. Ensure the procurement source provides valid traceability documentation for military-grade semiconductor components.

Selection Notes

Select this component when full military temperature coverage (-55°C to 125°C) is required, distinguishing it from commercial SN74F138 variants limited to 0°C to 70°C. Consider the specific pinout and package dimensions of the LCCC format during PCB layout. Evaluate the need for multiple enable inputs if cascading decoders or implementing demultiplexing logic in the target circuit.

Part Context

This part belongs to the SN54F138 family of 3-line to 8-line decoders and demultiplexers. It is a military-qualified version of the standard SN54F138, adhering to strict reliability standards. The device serves as a foundational logic component for address decoding and signal distribution in complex digital systems requiring robust performance under extreme environmental conditions.

Replacement Considerations

SN54F138FK

FAQ

What is the operating temperature range for the M38510/33701B2A?

The device is characterized for operation over the full military temperature range of –55°C to 125°C.

How many enable inputs does the decoder have?

It incorporates three enable inputs: one active-high (G1) and two active-low (G2A, G2B).