SN74AHC157QWBQBRQ1

Signal Switches, Multiplexers, Decoders Overview

The SN74AHC157QWBQBRQ1 is an automotive-grade quadruple 2-line to 1-line data selector/multiplexer from Texas Instruments. It operates within a supply voltage range of 2V to 5.5V and supports a junction temperature range of -40°C to +125°C. The device features a common strobe input that forces all outputs low when high, enabling synchronized data routing. It utilizes a WQFN-16 package with wettable flanks for enhanced inspection reliability.

Signal Switches, Multiplexers, Decoders Feature Summary

• AEC-Q100 qualified for automotive applications with specified temperature grades and ESD classifications
• Includes wettable flank technology in the QFN package to improve side soldering wetting and enable automatic optical inspection
• Features balanced CMOS push-pull outputs capable of sourcing and sinking similar currents

Signal Switches, Multiplexers, Decoders Applications

• Memory device selection with shared data bus
• Reducing required number of outputs for chip select applications
• Routing data between source devices

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific ordering suffix matches the required package type and reel specifications. Confirm AEC-Q100 qualification requirements align with target automotive systems. Ensure design accounts for the recommended operating conditions regarding supply voltage and thermal management. Review the datasheet for absolute maximum ratings to prevent device damage during operation.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component for designs requiring synchronous multiplexing of four-bit data words in automotive environments. The device is suitable where wettable flank packages are mandated for improved solder joint inspection. Consider the 2V to 5.5V operating range for compatibility with various logic levels. Evaluate the propagation delay characteristics against system timing requirements.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the SN74AHC157-Q1 family of automotive quad multiplexers. It shares functional similarities with other members of the series but differs in packaging and specific electrical parameters. The WQFN variant offers a compact footprint compared to TSSOP or DIP alternatives within the same logical family.

Signal Switches, Multiplexers, Decoders Replacement Considerations

SN74AHC157PWQBRQ1 (TSSOP-16 variant)

Signal Switches, Multiplexers, Decoders FAQ

What is the function of the G input?

The G input is an active-low output strobe. When G is high, all Y outputs are forced low regardless of other inputs. When G is low, the device selects data based on the A/B address input.

How does the wettable flank feature benefit assembly?

Wettable flanks allow solder to flow up the side of the lead, creating a visible fillet. This enables reliable verification of solder joint quality using Automatic Optical Inspection (AOI).