SN74AHC238PWR

Signal Switches, Multiplexers, Decoders Overview

The SN74AHC238PWR is a 16-pin TSSOP 3-to-8 line noninverting decoder/demultiplexer from Texas Instruments. It operates within a supply voltage range of 2V to 5.5V and supports an operating temperature range of -40°C to 125°C. The device features balanced CMOS push-pull outputs and standard CMOS inputs with clamping diodes. Maximum propagation delay is 10.5ns at 5V with 50pF load. Latch-up performance exceeds 250mA per JESD 17.

Signal Switches, Multiplexers, Decoders Feature Summary

• Provides three address select inputs (A0, A1, A2) to decode binary signals into one of eight active-high outputs while others remain low.
• Includes three strobe inputs (G1, G2, G0) to control output enable states, allowing for cascading or demultiplexing functions.
• Features balanced CMOS push-pull outputs capable of sourcing and sinking similar currents for robust signal driving.
• Incorporates standard CMOS inputs requiring fast transition rates to prevent excessive power consumption and oscillations.

Signal Switches, Multiplexers, Decoders Applications

• Memory device selection with shared data bus
• Reducing required number of outputs for chip select applications
• Routing data in solid-state memory systems

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific ordering suffix matches the required package type, as the SN74AHC238 family includes both WQFN and TSSOP variants. Confirm that the thermal pad connection requirements for the specific package variant align with your PCB layout design. Ensure input pins are terminated properly during operation to maintain device reliability and prevent undefined logic states.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when a high-speed 3-to-8 decoding function is required within a 2V to 5.5V supply range. Consider the TSSOP package for through-hole compatible surface mount assembly. Evaluate the maximum capacitive load requirements, as performance specifications are optimized for loads up to 50pF. Ensure input transition rates meet the recommended operating conditions to avoid oscillation issues.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the SN74AHC series of high-speed CMOS logic devices manufactured by Texas Instruments. The AHC series is designed for low power consumption and wide voltage operation compared to older logic families. The SN74AHC238 specifically addresses the need for efficient address decoding in complex digital systems where multiple peripheral devices share a common data bus.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Direct functional substitutes include other SN74AHC238 variants such as SN74AHC238BQBR for WQFN packaging. Verify pin compatibility and electrical characteristics against the original datasheet before substitution. Ensure any replacement maintains the same voltage and temperature operating ranges.