SN74HCS259QWBQBRQ1

Overview

The SN74HCS259QWBQBRQ1 is an automotive-grade, 8-bit addressable latch from the Texas Instruments SN74HCS259-Q1 series. It operates within a supply voltage range of 2 V to 6 V and supports an ambient temperature range of -40°C to +125°C. The device features Schmitt-trigger inputs for noise rejection and balanced CMOS push-pull outputs capable of ±7.8 mA drive current at 6 V. It utilizes a 16-pin WQFN (WBQB) package with wettable flanks.

Feature Summary

• AEC-Q100 qualified for automotive applications
• Schmitt-trigger inputs support slow or noisy signals
• Balanced CMOS push-pull outputs provide high drive capability
• Wettable flank QFN package facilitates automatic optical inspection

Applications

• Memory device selection with shared data bus
• Reducing required number of outputs for chip select applications
• Routing data in digital systems

Procurement Notes

Verify that the specific WBQB package variant matches the design requirements for thermal management and solderability. Confirm AEC-Q100 qualification aligns with target automotive grade specifications. Ensure input termination strategies account for Schmitt-trigger characteristics to prevent excessive dynamic current consumption during signal transitions.

Selection Notes

Select this component when designing automotive digital systems requiring general-purpose storage or active-high decoding. The wide operating voltage range accommodates various power supply architectures. Consider the low static power consumption and robust ESD protection levels suitable for harsh automotive environments.

Part Context

This part belongs to the SN74HCS259-Q1 family of automotive addressable latches. It provides multifunctional capabilities including working registers, serial-holding registers, and 1-of-8 decoders. The device integrates eight addressable latches controlled by three select inputs and a global enable.

Replacement Considerations

Direct replacements include other packages within the same family such as SN74HCS259PW-Q1 (TSSOP) or SN74HCS259D-Q1 (SOIC). Verify pinout compatibility and thermal performance differences when substituting between package types.