SN74HCS237QPWRQ1

Overview

The SN74HCS237QPWRQ1 is an automotive-qualified, high-speed CMOS decoder/demultiplexer featuring latched address inputs and Schmitt-trigger functionality. It converts three binary address lines into one of eight active-high outputs. The device operates within a supply voltage range of 2 V to 6 V and supports an ambient temperature range from -40°C to +125°C. It utilizes a 16-pin TSSOP package.

Feature Summary

• AEC-Q100 qualified for automotive environments with specified temperature grades and ESD protection levels
• Integrated latch enable input allows retention of the selected output state independent of address changes
• Schmitt-trigger inputs provide noise immunity and tolerance for slow signal transitions
• Dual strobe inputs facilitate cascading configurations and demultiplexing operations

Applications

• Memory device selection utilizing shared data buses
• Reducing output pin requirements for chip select applications
• Data routing in embedded systems

Procurement Notes

Verify the specific suffix 'PW' corresponds to the TSSOP-16 package variant required for your design. Confirm that the Q1 designation aligns with your automotive qualification standards. Ensure compatibility with your system's voltage levels and thermal management capabilities before finalizing procurement.

Selection Notes

Select this component when latching address inputs are necessary to maintain output states during bus fluctuations. The Schmitt-trigger inputs make it suitable for noisy environments or applications with slow-rising signals. Verify that the 16-pin TSSOP footprint matches your PCB layout constraints.

Part Context

This part belongs to the SN74HCS series of high-speed CMOS logic devices. The HCS designation indicates the inclusion of Schmitt-trigger inputs for improved noise rejection. The Q1 suffix denotes automotive qualification according to AEC-Q100 standards, ensuring reliability under harsh operating conditions.

Replacement Considerations

SN74HCS237D-Q1 (SOIC-16 package)

FAQ

How does the latch enable input affect the decoder operation?

When the latch enable input is low, the device functions as a standard decoder. When high, the address latches retain their previous state, maintaining the active output regardless of subsequent changes at the address inputs.

What is the function of the two strobe inputs?

The two strobe inputs allow for cascading multiple decoders or facilitating demultiplexing functions. Activating either strobe forces all outputs into the low state.