M74HC139RM13TR

Overview

The M74HC139RM13TR is a dual 2-to-4 decoder/demultiplexer from the STMicroelectronics HC logic family. It operates on a supply voltage range of 2V to 6V and features high-speed performance with a typical propagation delay of 13ns at 6V. The device includes active low enable inputs for gating or demultiplexing, balanced propagation delays, and symmetrical output impedance. It provides high noise immunity and low power dissipation, with a maximum quiescent current of 4μA.

Feature Summary

• Dual independent 2-to-4 decoding and demultiplexing circuits
• Active low enable inputs for signal gating control
• High noise immunity with defined input thresholds
• Balanced propagation delays between address and enable paths

Applications

• Address decoding in microprocessor systems
• Data distribution and demultiplexing
• Gating control signals in digital logic circuits
• Memory chip select generation

Procurement Notes

Verify component authenticity through authorized channels as this part may be obsolete. Confirm package type matches design requirements. Check RoHS compliance status. Validate operating temperature range suitability. Ensure ESD protection measures are implemented during handling.

Selection Notes

Consider the HC logic family compatibility with existing system components. Evaluate supply voltage requirements against available power rails. Assess propagation delay specifications for timing constraints. Verify package availability and mounting preferences. Review environmental operating conditions for application suitability.

Part Context

This component belongs to the M74HC139 series of dual decoders manufactured by STMicroelectronics. It utilizes silicon gate C2MOS technology for high-speed operation. The device is pin and function compatible with standard 74 series 139 implementations. It offers multiple package options including DIP, SOP, and TSSOP configurations.

Replacement Considerations

CD74HC139M96 (Texas Instruments) - Direct replacement option available.