JM54AC138SEA-RH

Overview

The JM54AC138SEA-RH is a high-speed 1-of-8 decoder/demultiplexer manufactured by National Semiconductor. It features three enable inputs and accepts a 3-bit binary coded address to select one of eight outputs. The device operates within a voltage range of 3.0V to 5.5V and supports output drive currents of 24mA for both high and low states. It is housed in a 16-CDIP package with a 0.300-inch (7.62mm) width, designed for robust performance in military-grade environments.

Feature Summary

• Provides 1-of-8 decoding or demultiplexing functionality using a 3-bit binary address input
• Includes three enable inputs for flexible system control and power management
• Supports high-speed logic interfacing with propagation delays typically under 6 ns at VCC = 5V
• Capable of driving loads with 24mA output current in both high and low states

Applications

• High-performance logic interfacing requiring fast switching speeds
• Military-grade electronic systems demanding extended temperature operation
• Decoder applications for memory addressing or I/O port selection
• Demultiplexing circuits in data routing systems

Procurement Notes

Verify the manufacturer designation as National Semiconductor, now part of Texas Instruments, to ensure component authenticity. Confirm the specific suffix 'RH' indicates the required military-grade temperature range and reliability specifications. Ensure the 16-CDIP package matches your board layout requirements before procurement.

Selection Notes

Select this component when a high-speed, 1-of-8 decoder is required with multiple enable controls. It is suitable for designs needing 24mA output drive capability and operation across the -55°C to +125°C temperature range. Consider the 16-CDIP package constraints if surface mount alternatives are not feasible for the specific application environment.

Part Context

This part belongs to the 54AC138 family of decoders/demultiplexers from National Semiconductor. The 'JM' prefix typically denotes military-grade qualification, while 'AC' indicates advanced CMOS technology offering higher speed than standard AC series devices. It shares functional similarities with other 54AC series logic components but is distinct in its specific pinout and enable configuration.

Replacement Considerations

Direct substitutes include other 54AC138 variants from National Semiconductor or Texas Instruments that match the military grade and CDIP package. Verify equivalent electrical characteristics, specifically the 3.0V to 5.5V operating range and 24mA drive current, before substitution.