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Product Detailed Parameters
- Description：54AC138 - DECODER/DEMULTIPLEXER
- Series：*
- Mfr：Rochester Electronics, LLC
- Package：Bulk
- Type：-
- Circuit：-
- Independent Circuits：-
- Current - Output High, Low：-
- Voltage Supply Source：-
- Voltage - Supply：-
- Operating Temperature：-
- Mounting Type：-
- Package / Case：-
- Supplier Device Package：-
- Grade：-
- Qualification：-
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Overview
The SN54AC138/QEA is a military-grade 3-to-8 line decoder and demultiplexer manufactured by Rochester Electronics. It utilizes AC CMOS technology to provide high-speed switching capabilities suitable for demanding environments. The device features three address inputs and eight active-low outputs, along with three enable inputs for flexible system integration. Designed for reliability, it operates within the standard military temperature range and is housed in a ceramic package.
Feature Summary
- Military-grade construction ensuring operation across extended temperature ranges
- High-speed AC CMOS logic technology for efficient signal processing
- Three address lines decoding into eight distinct active-low outputs
- Multiple enable inputs allowing complex control logic configurations
Applications
- Aerospace communication systems requiring high reliability
- Military data acquisition and telemetry equipment
- Avionics control units and navigation systems
- Harsh environment industrial automation controllers
Procurement Notes
Verify the specific suffix QEA against official manufacturer documentation to confirm the exact package type and material composition. Ensure the component meets all required military specifications and environmental standards for your intended application before procurement.
Selection Notes
Select this component when military-grade reliability and extended temperature performance are critical. The AC series offers a balance of speed and power consumption suitable for complex digital logic applications in defense and aerospace sectors where standard commercial parts are insufficient.
Part Context
Rochester Electronics specializes in providing lifecycle management for obsolete and hard-to-find semiconductors. This part belongs to the SN54 family, which denotes military-grade quality. The company ensures supply continuity for legacy components used in long-life defense and aerospace programs.
Replacement Considerations
Direct replacements include other SN54AC138 variants from Texas Instruments or equivalent manufacturers. Verify pin compatibility and electrical characteristics carefully. Cross-reference with SN54HC138 or SN54LS138 only if speed and voltage requirements allow.
