74AHCT138PW,112

Signal Switches, Multiplexers, Decoders Overview

The Nexperia 74AHCT138PW,112 is a 3-to-8 line decoder and demultiplexer housed in a 16-pin TSSOP package. It operates within a supply voltage range of 4.5V to 5.5V and supports an industrial operating temperature range from -40°C to +125°C. The device features three binary weighted address inputs (A0, A1, A2) and eight mutually exclusive active LOW outputs (Y0 to Y7). It includes three enable inputs: two active LOW (E1, E2) and one active HIGH (E3), facilitating parallel expansion for larger decoding configurations.

Signal Switches, Multiplexers, Decoders Feature Summary

• Supports demultiplexing functionality by utilizing active LOW enable inputs as data inputs with remaining enables serving as strobes.
• Features multiple input enable logic that allows easy parallel expansion to a 1-of-32 decoder configuration using four devices and one inverter.
• Provides balanced propagation delays and Schmitt-trigger action on all inputs for improved noise immunity.

Signal Switches, Multiplexers, Decoders Applications

• Memory chip select decoding
• Industrial control systems requiring wide temperature operation
• Demultiplexing applications

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific suffix '112' corresponds to the TSSOP-16 package variant when sourcing. Confirm RoHS compliance status and moisture sensitivity level requirements against current datasheet revisions. Ensure the TTL-compatible input levels match the system logic voltage standards before integration.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when TTL-compatible input thresholds are required alongside high-speed CMOS performance. The AHCT series ensures compatibility with standard TTL logic levels while offering lower power consumption than legacy LSTTL counterparts. Verify that the 16-pin TSSOP footprint fits the PCB layout constraints.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the 74AHCTx138 family of 3-to-8 line decoders. It is pin-compatible with Low Power Schottky TTL (LSTTL) devices. The device is specified in compliance with JEDEC standard No. 7A and offers ESD protection exceeding 2000V HBM and 1000V CDM.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Direct substitutes include the 74AHCT138D,112 (SOIC-16 package) and the 74AHCT138BQ,115 (DHVQFN-16 package). Other manufacturers offer equivalent parts such as the SN74AHCT138QDRQ1 from Texas Instruments or the 74AHCT138S16-13 from Diodes Incorporated.