74AHC138D-Q100J

Signal Switches, Multiplexers, Decoders Overview

The Nexperia 74AHC138D-Q100J is a high-speed Si-gate CMOS 3-to-8 line decoder/demultiplexer with inverting outputs. It accepts three binary weighted address inputs (A0, A1, A2) and provides eight mutually exclusive outputs (Y0 to Y7) that are LOW when selected. The device features three enable inputs: two active LOW (E1, E2) and one active HIGH (E3). Qualified to AEC-Q100 Grade 1 standards, it operates within an ambient temperature range of -40 °C to +125 °C. It utilizes a 16-lead plastic small outline package (SO16, SOT109-1) with a body width of 3.9 mm.

Signal Switches, Multiplexers, Decoders Feature Summary

• Automotive product qualification in accordance with AEC-Q100 (Grade 1)
• All inputs feature Schmitt-trigger action for improved noise immunity
• Demultiplexing capability by utilizing enable inputs as data or strobes
• Multiple input enable configuration allows easy parallel expansion

Signal Switches, Multiplexers, Decoders Applications

• Memory chip select decoding
• Automotive electronic systems requiring Grade 1 qualification
• Parallel expansion of decoders to larger line configurations

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific ordering suffix 'J' against the manufacturer's current documentation to confirm packaging details, such as reel size or tape specifications. Ensure the SO16 package variant matches the required PCB footprint dimensions. Confirm compliance with RoHS directives and REACH regulations prior to integration into final assemblies.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component for designs requiring automotive-grade reliability and wide operating temperature ranges. The 74AHC138 variant supports CMOS input levels, whereas the 74AHCT138 supports TTL levels; verify logic compatibility. Consider the multiple enable inputs for system expansion needs and ensure proper termination of unused enable pins to their active states.

Signal Switches, Multiplexers, Decoders Part Context

This device belongs to the Nexperia 74AHC/AHCT138-Q100 family of 3-to-8 line decoders and demultiplexers. These devices are pin-compatible with Low Power Schottky TTL (LSTTL) and specified in compliance with JEDEC standard No. 7A. The family includes variants in SO16, TSSOP16, and DHVQFN16 packages, all offering balanced propagation delays and overvoltage tolerant inputs.

Signal Switches, Multiplexers, Decoders Replacement Considerations

The 74AHCT138D-Q100J serves as a functional substitute within the same family, differing only in input logic level compatibility (TTL vs. CMOS).