74ACT138MTR

Signal Switches, Multiplexers, Decoders Overview

The 74ACT138MTR is a 3-to-8 line inverting decoder manufactured using advanced sub-micron silicon gate and double-layer metal wiring C2MOS technology. It operates within a voltage range of 4.5V to 5.5V, featuring typical propagation delays of 5ns at VCC = 5V. The device provides symmetrical output impedance with minimum drive currents of 24mA for both high and low states. It includes three enable inputs to facilitate cascade connections and memory address decoding applications.

Signal Switches, Multiplexers, Decoders Feature Summary

• Advanced CMOS construction ensures high-speed operation with balanced propagation delays.
• Compatible with TTL output voltage levels for direct interfacing with various logic families.
• Provides robust protection circuits against static discharge and transient excess voltage.
• Designed for 50Ω transmission line driving capability with symmetrical output impedance.

Signal Switches, Multiplexers, Decoders Applications

• Memory address decoding systems
• Data routing applications
• Cascaded decoder configurations
• High-speed digital logic interfaces

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific ordering suffix 'MTR' corresponds to the tape and reel packaging format as indicated in the official STMicroelectronics documentation. Confirm that the component status aligns with current availability requirements, noting that certain package variants may be marked obsolete. Ensure compatibility with standard surface-mount assembly processes for the TSSOP-16 package type.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when interfacing High-Speed CMOS systems with TTL, NMOS, or CMOS outputs requiring precise address decoding. The 74ACT138MTR is suitable for designs needing low power dissipation alongside high-speed performance. Consider its 5V operating range and ESD immunity when designing environments susceptible to transient voltages.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the 74ACT series of advanced CMOS logic devices, offering speed comparable to older TTL families while maintaining lower power consumption. The 74ACT138 specifically functions as a 3-to-8 line decoder, utilizing three binary select inputs to activate one of eight outputs based on enable conditions.

Signal Switches, Multiplexers, Decoders Replacement Considerations

The datasheet indicates pin and function compatibility with the standard 74 Series 138. Cross-reference with other manufacturers' 74HC138 or 74HCT138 equivalents if voltage tolerance or specific drive strength requirements differ from the ACT specifications.