SN74HCT595QPWRQ1

Shift Registers Overview

The SN74HCT595QPWRQ1 is an automotive-grade, 8-bit serial-in, parallel-out shift register with a storage register and 3-state outputs. It operates at 4.5 V to 5.5 V and supports frequencies up to 25 MHz. The device features TTL-compatible inputs (VIL max 0.8 V, VIH min 2 V) and balanced CMOS push-pull outputs. It includes a direct clear input for the shift register and separate clocks for shifting and latching data.

Shift Registers Feature Summary

• AEC-Q100 qualified for automotive applications across -40°C to +125°C
• LSTTL and CMOS input logic compatibility
• Balanced CMOS 3-state outputs with high-impedance capability
• Direct overriding clear input for the shift register

Shift Registers Applications

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

Shift Registers Procurement Notes

Verify the specific ordering suffix matches the required package type, as the Q1 series utilizes distinct suffixes for different physical packages. Confirm that the component meets AEC-Q100 Grade 1 requirements for your target temperature range. Ensure design implementation accounts for the specified ESD classification levels during handling.

Shift Registers Selection Notes

Select this component when interfacing with LSTTL loads or requiring simple GPIO control without complex communication interfaces. It is suitable for designs needing cascaded shift registers with independent output enable control. Verify that the supply voltage remains within the 4.5 V to 5.5 V range to maintain specified electrical characteristics.

Shift Registers Part Context

This part belongs to the SN74HCT595-Q1 family of automotive 8-bit shift registers. It shares functional similarities with other HCT series devices but is specifically optimized for automotive environments. The device provides a reliable solution for expanding digital I/O capabilities in vehicle electronics systems.

Shift Registers Replacement Considerations

SN74HCT595PW-Q1

Shift Registers FAQ

How does the OE pin affect internal data?

When the output-enable (OE) input is high, the storage register outputs enter a high-impedance state. However, internal register data and the serial output (QH') are not impacted by the operation of the OE input.

What happens to unused inputs?

Unused inputs must never be left floating. They should be terminated at VCC or GND using a pull-up or pull-down resistor, typically 10 kΩ, to prevent undefined operational states and excessive power consumption.