M74HC138RM13TR

Overview

The M74HC138RM13TR is a high-speed CMOS 3-to-8 line decoder fabricated with silicon gate C2MOS technology. It features three binary select inputs (A, B, and C) that determine which of the eight outputs goes low when enabled. The device includes three enable inputs to facilitate cascade connections and memory address decoding. It operates within a wide voltage range of 2V to 6V, offering symmetrical output impedance and balanced propagation delays.

Feature Summary

• Provides three binary select inputs to decode signals into one of eight active-low outputs
• Includes three enable inputs to manage cascading and inhibit decoding functions
• Features protection circuits against static discharge and transient excess voltage on all inputs

Applications

• Memory address decoding in computer systems
• Cascaded connection for expanded decoding requirements
• Application of address decoders for memory systems

Procurement Notes

Verify the specific package type matches the design requirement, as this part number corresponds to the SOP-16 variant. Confirm the revision status and lead times directly with STMicroelectronics or authorized distributors, as availability may vary by region. Ensure ESD handling protocols are followed during assembly due to the CMOS construction.

Selection Notes

Select this component when a high-speed 3-to-8 decoder with multiple enable controls is required. It is suitable for designs needing wide operating voltage flexibility between 2V and 6V. Consider its pin compatibility with standard 74 series logic if migrating from older technologies. Evaluate the propagation delay specifications against system timing constraints.

Part Context

This component belongs to the M74HC138 family of decoders manufactured by STMicroelectronics. It utilizes silicon gate C2MOS technology to achieve high speed and low power dissipation. The device is functionally compatible with the standard 74 series 138 decoder, ensuring ease of integration into existing digital logic architectures.

Replacement Considerations

Direct substitutes include other manufacturers' 74HC138 variants in SO-16 packages. Verify pinout compatibility and electrical characteristics such as propagation delay and supply voltage ranges before substitution.