74AHC138BQ-Q100X

Signal Switches, Multiplexers, Decoders Overview

The Nexperia 74AHC138BQ-Q100X 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). The device features two active LOW enable inputs (E1, E2) and one active HIGH enable input (E3). It operates within a supply voltage range of 2.0 V to 5.5 V and supports an ambient temperature range from -40 °C to +125 °C. The component is housed in a DHVQFN16 package (SOT763-1) measuring 2.5 × 3.5 × 0.85 mm.

Signal Switches, Multiplexers, Decoders Feature Summary

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

Signal Switches, Multiplexers, Decoders Applications

• Memory chip select decoding
• Parallel expansion of decoders to larger line configurations
• Eight-output demultiplexer implementations

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific ordering suffix matches the required tape and reel quantity. Confirm that the DHVQFN16 package variant aligns with the PCB footprint requirements. Ensure the design accounts for the thermal enhanced pad characteristics specified in the datasheet. Cross-reference the revision history to confirm the document version matches the production batch specifications.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when automotive grade reliability (AEC-Q100 Grade 1) is required alongside high-speed logic performance. The DHVQFN16 package offers a compact solution for space-constrained designs. Verify compatibility with system voltage levels, as the AHC series requires CMOS input levels distinct from the AHCT series which supports TTL levels.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the 74AHC138-Q100 family of 3-to-8 line decoders and demultiplexers manufactured by Nexperia. It is pin-compatible with Low Power Schottky TTL (LSTTL) devices and complies with JEDEC standard No. 7A. The BQ suffix specifically denotes the DHVQFN16 plastic dual in-line compatible thermal enhanced very thin quad flat package.

Signal Switches, Multiplexers, Decoders Replacement Considerations

The 74AHCT138BQ-Q100 serves as a direct functional substitute within the same package, differing primarily in input voltage compatibility where the AHCT variant operates with TTL input levels.