74HCT138D-Q100,118

Signal Switches, Multiplexers, Decoders Overview

The Nexperia 74HCT138D-Q100,118 is a 3-to-8 line decoder and demultiplexer in the 74HCT logic family. It decodes three binary weighted address inputs (A0, A1, A2) to eight mutually exclusive active LOW outputs (Y0 to Y7). The device features three enable inputs: two active LOW (E1, E2) and one active HIGH (E3). It operates within a supply voltage range of 4.5 V to 5.5 V and supports an ambient temperature range from -40 °C to +125 °C. Qualified to AEC-Q100 Grade 1 standards, it utilizes a 16-lead SO plastic small outline package (SOT109-1).

Signal Switches, Multiplexers, Decoders Feature Summary

• Automotive qualification compliant with AEC-Q100 Grade 1 standards.
• TTL-compatible input levels for direct interfacing with TTL logic systems.
• Demultiplexing capability by utilizing active LOW enable inputs as data strobes.
• Multiple enable inputs facilitate easy parallel expansion to larger decoding configurations.

Signal Switches, Multiplexers, Decoders Applications

• Memory chip select decoding in automotive electronic control units.
• Address decoding for peripheral devices in vehicle networks.
• Signal routing and demultiplexing in automotive sensor interfaces.

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify that the specific ordering suffix matches the required package type, as the 74HCT138D-Q100 designation corresponds specifically to the SO16 (SOT109-1) package variant. Confirm the AEC-Q100 Grade 1 qualification status aligns with project requirements. Ensure environmental compliance documentation is available for the manufacturing batch. Cross-reference the full part number against current Nexperia availability lists to confirm production status.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when TTL-level compatibility is required for the 74HC138 architecture. The HCT series ensures proper voltage thresholds for legacy or mixed-voltage automotive logic systems. Verify that the operating temperature range meets the specific thermal constraints of the target application environment. Consider the package dimensions and lead pitch during PCB layout planning.

Signal Switches, Multiplexers, Decoders Part Context

This component belongs to the Nexperia 74HCT138-Q100 product family, which includes variants in different packages such as TSSOP16 and DHVQFN16. The 'D' suffix indicates the SO16 package form factor. The '-Q100' suffix denotes automotive qualification. Other family members share identical logical functionality but differ in physical footprint and thermal characteristics.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Direct substitutes include other 74HCT138 variants from Nexperia in alternative packages, such as 74HCT138PW-Q100 (TSSOP16) or 74HCT138BQ-Q100 (DHVQFN16), provided pinout compatibility is maintained. Non-Nexperia equivalents must be verified for identical logic truth tables, electrical specifications, and AEC-Q100 certification.