54ACT138/SFA-R

Overview

The SN54ACT138/SFA-R is a high-speed CMOS logic device manufactured by Rochester Electronics, LLC. It functions as a single 3-to-8 line decoder/driver with inverted outputs. The component utilizes the ACT series technology and is housed in a ceramic flatpack package (SFA). It is designed for operation within a supply voltage range of 4.5 V to 5.5 V. The device meets MIL-PRF-38535 Class V specifications and is qualified under AS9120 certification standards.

Feature Summary

• Provides decoding functionality for three binary inputs into eight mutually exclusive active-low outputs
• Constructed using high-speed CMOS technology for low power consumption and fast switching speeds
• Includes multiple enable inputs to control device activation and prevent bus contention
• Manufactured in a hermetically sealed ceramic flatpack package suitable for harsh environments

Applications

• Address decoding in military-grade computer systems
• Signal routing in aerospace communication equipment
• Control logic in space-qualified electronic subsystems

Procurement Notes

Verify that the specific SFA suffix corresponds to the required ceramic flatpack package configuration. Confirm that the manufacturer holds current AS9120 certification and meets DLA standards. Ensure the device lot complies with MIL-PRF-38535 Class V requirements for space-level applications before finalizing procurement.

Selection Notes

Select this component when a radiation-hardened or high-reliability 3-to-8 decoder is required for critical systems. The ACT series offers superior speed compared to standard HC/HCT logic while maintaining CMOS power efficiency. Verify that the operating temperature range and supply voltage specifications align with the system design constraints.

Part Context

This part belongs to the SN54ACT138 family of decoders produced by Rochester Electronics. The company specializes in supplying quality-assured semiconductor products equal to original OEM specifications. These devices are often sourced from qualified manufacturers listed on the Qualified Manufacturers List (QML) for defense and aerospace sectors.

Replacement Considerations

Compatible substitutes include other SN54ACT138 variants from different manufacturers, provided they meet the same electrical characteristics and package dimensions. Verify pin compatibility and ensure the alternative device supports the required MIL-PRF-38535 Class V qualification level.