SN74HCS595QDYYRQ1

Shift Registers Overview

The SN74HCS595QDYYRQ1 is an automotive-grade, 8-bit serial-in, parallel-out shift register with a D-type storage register. It operates within a supply voltage range of 2 V to 6 V and supports ambient temperatures from -40°C to +125°C. The device features Schmitt-trigger inputs for noise rejection and balanced CMOS 3-state outputs capable of ±7.8-mA drive current at 6 V. It is housed in a 16-pin SOT-23-THIN package.

Shift Registers Feature Summary

• Schmitt-trigger inputs eliminate erroneous data outputs caused by slow-edged or noisy signals
• Balanced CMOS 3-state outputs provide high-impedance states when disabled
• Separate clocks allow independent control of the shift register and storage register
• Direct overriding clear input resets the shift register regardless of clock states

Shift Registers Applications

• Output expansion
• LED matrix control
• 7-segment display control
• 8-bit data storage

Shift Registers Procurement Notes

Verify that the specific ordering suffix matches the required package type, as the SN74HCS595-Q1 family includes multiple packages such as TSSOP, SOIC, WQFN, and SOT-23-THIN. Confirm AEC-Q100 qualification requirements are met for the target automotive application environment before finalizing procurement specifications.

Shift Registers Selection Notes

Select this component when designing systems requiring robust noise immunity due to its Schmitt-trigger architecture. Ensure the design accommodates the wide operating voltage range of 2 V to 6 V. Consider the separate clock inputs if independent shifting and latching operations are necessary for the system timing requirements.

Shift Registers Part Context

This part belongs to the SN74HCS595-Q1 family of automotive logic devices manufactured by Texas Instruments. The family shares identical logical functionality but differs in physical packaging options, including TSSOP, SOIC, WQFN, and SOT-23-THIN variants to suit different board space and thermal constraints.

Shift Registers Replacement Considerations

SN74HCS595PW-Q1 (TSSOP), SN74HCS595D-Q1 (SOIC), SN74HCS595BQB-Q1 (WQFN), SN74HCS595WBQB-Q1 (WQFN). Verify pinout compatibility and thermal characteristics when substituting between package types.

Shift Registers FAQ

How does the device handle noisy input signals?

All inputs utilize Schmitt-trigger architecture, which provides hysteresis to eliminate erroneous data outputs resulting from slow-edged or noisy input signals.

What happens to the internal data when the output-enable pin is high?

When the OE input is high, the storage register outputs enter a high-impedance state. However, the internal register data and the serial output (QH') remain unaffected by the OE operation.