74AHC138BQ,115

Signal Switches, Multiplexers, Decoders Overview

The Nexperia 74AHC138BQ,115 is a high-speed Si-gate CMOS 3-to-8 line decoder/demultiplexer. 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 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) with dimensions of 2.5 × 3.5 × 0.85 mm.

Signal Switches, Multiplexers, Decoders Feature Summary

• Balanced propagation delays across all logic paths
• All inputs feature Schmitt-trigger action for noise immunity
• Multiple enable inputs facilitate easy parallel expansion to larger decoders
• Inputs accept voltages higher than the supply voltage (VCC)

Signal Switches, Multiplexers, Decoders Applications

• Memory chip select decoding
• Demultiplexing data streams using enable inputs as strobes
• Parallel expansion to 1-of-32 decoders

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific ordering suffix matches the required package variant. Confirm RoHS compliance status and REACH registration details against current regulatory standards. Ensure the procurement documentation references the correct JEDEC standard No. 7A specifications. Validate that the supplier provides the official product data sheet for design reference.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component for applications requiring high-speed decoding with low power consumption. The DHVQFN16 package is suitable for space-constrained PCB layouts. Ensure the system voltage falls within the 2.0 V to 5.5 V operating range. Consider the Schmitt-trigger inputs if the application involves noisy signal environments.

Signal Switches, Multiplexers, Decoders Part Context

This device belongs to the 74AHC family of high-speed CMOS logic products. It is pin-compatible with Low Power Schottky TTL (LSTTL) devices, allowing for direct replacement in legacy designs. The 74AHC138 series is specified in compliance with JEDEC standard No. 7A, ensuring interoperability with other industry-standard logic components.

Signal Switches, Multiplexers, Decoders Replacement Considerations

The 74AHCT138BQ,115 serves as a functional alternative within the same package, offering TTL-compatible input levels instead of CMOS levels. Designers must verify input voltage thresholds when substituting between AHC and AHCT variants.