74AC138MTR

Signal Switches, Multiplexers, Decoders Overview

The STMicroelectronics 74AC138MTR is a high-speed CMOS 3-to-8 line inverting decoder fabricated with sub-micron silicon gate and double-layer metal wiring C2MOS technology. It operates within a supply voltage range of 2V to 6V, featuring low power dissipation with a maximum quiescent current of 4µA at 25°C. The device provides symmetrical output impedance with minimum drive currents of 24mA for both high and low states. It includes three binary select inputs (A, B, C) and three enable inputs (G1, G2A, G2B) to facilitate cascade connections and memory address decoding.

Signal Switches, Multiplexers, Decoders Feature Summary

• Advanced high-speed CMOS fabrication using sub-micron silicon gate and double-layer metal wiring C2MOS technology
• Three tree enable inputs designed to ease cascade connection and application of address decoders for memory systems
• All inputs and outputs equipped with protection circuits against static discharge providing 2KV ESD immunity

Signal Switches, Multiplexers, Decoders Applications

• Address decoders for memory systems
• Cascade connection applications requiring multiple decoder units
• High-speed digital logic circuitry operating within the specified voltage range

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific package type required, as the MTR suffix indicates tape and reel packaging. Confirm that the component meets RoHS compliance requirements if applicable to your manufacturing standards, noting that older datasheets may list varying environmental statuses. Ensure the ordering code matches the exact pin configuration and electrical specifications needed for your design implementation.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when designing systems requiring fast propagation delays and low power consumption. It is suitable for mixed-voltage environments due to its wide operating range. Consider the SOIC-16 surface mount package for space-constrained PCB layouts. Verify that the noise immunity and latch-up immunity meet the specific reliability standards of the target application environment.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the 74AC series of logic devices, known for advanced CMOS performance comparable to the older AC/ACT families but with lower power consumption. The 74AC138 specifically functions as a 3-to-8 line decoder, providing inverted outputs based on binary input selection. It maintains pin and function compatibility with standard 74 series 138 devices while offering improved speed and electrical characteristics.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Check for direct pin-compatible alternatives from other manufacturers such as Texas Instruments or NXP. Ensure any substitute maintains the same 3-to-8 decoding functionality, voltage range, and package dimensions. Verify that the replacement's propagation delay and drive current specifications meet or exceed the original requirements.