SN74ACT138WBQBRQ1

Signal Switches, Multiplexers, Decoders Overview

The SN74ACT138WBQBRQ1 is an automotive-grade 3-to-8 decoder/demultiplexer featuring TTL-compatible CMOS inputs. It operates within a supply voltage range of 4.5V to 5.5V and supports continuous output drive currents of ±24mA at 5V, with short burst capabilities up to ±75mA. The device provides fast propagation delays, typically ranging from 6.6ns to 11ns depending on the input path. It includes balanced push-pull outputs and three enable inputs (G0, G1, G2) for flexible gating. Qualified under AEC-Q100 standards, it functions reliably across temperatures from -40°C to +125°C.

Signal Switches, Multiplexers, Decoders Feature Summary

• AEC-Q100 qualified for automotive applications with specified temperature grades and ESD classifications
• TTL-compatible CMOS inputs allow direct interfacing with legacy logic without level shifting
• Balanced CMOS push-pull outputs provide robust drive capability for transmission lines and heavy loads
• Wettable flank WQFN package design facilitates reliable soldering and automated optical inspection

Signal Switches, Multiplexers, Decoders Applications

• Memory device selection with shared data bus architectures
• Reducing required output counts for chip select applications in complex systems
• Routing data signals through demultiplexing configurations

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific ordering suffix matches the required package type, as the BQB suffix denotes the wettable flank WQFN variant. Confirm that the procurement channel sources production-active parts rather than preproduction prototypes. Ensure the received components align with the AEC-Q100 qualification requirements for your automotive environment. Check for any recent documentation updates regarding pinout or electrical characteristics before finalizing integration.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when designing automotive systems requiring high-speed decoding with TTL interface compatibility. It is suitable for applications needing strong output drive capabilities to manage transmission line effects or capacitive loads. Consider the thermal performance of the WQFN package if operating near maximum junction temperatures. Verify that the 4.5V to 5.5V supply range aligns with your system's power distribution network constraints.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the SN74ACT138-Q1 family of automotive decoders. It shares functional similarities with other 3-to-8 decoders but is distinguished by its ACT logic series characteristics, offering faster speeds than standard AC devices while maintaining TTL input thresholds. The WBQBRQ1 designation specifically identifies the wettable flank QFN packaging option optimized for reliability in harsh automotive environments.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Direct substitutes include other SN74ACT138-Q1 variants with different packages, such as the TSSOP version SN74ACT138PWRQ1. Non-TI equivalents may require verification of voltage levels and drive strengths. Ensure any replacement maintains the same AEC-Q100 qualification status and pinout compatibility to avoid redesigning the PCB layout.