SN74HCS594BQBR

Shift Registers Overview

The SN74HCS594BQBR is an automotive-grade, 8-bit serial-in, parallel-out shift register with a 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 push-pull outputs capable of ±7.8-mA drive current at 6 V. It is housed in a WQFN-16 package.

Shift Registers Feature Summary

• Schmitt-trigger inputs provide tolerance for slow or noisy input signals
• Balanced CMOS push-pull outputs support high current drive capabilities
• Separate clocks allow independent control of shift and storage registers

Shift Registers Applications

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

Shift Registers Procurement Notes

Verify the specific BQB suffix indicates the WQFN-16 package configuration. Confirm that the automotive qualification aligns with target system requirements. Ensure design compliance with absolute maximum ratings regarding supply voltage and thermal limits during operation.

Shift Registers Selection Notes

Select this component when noise immunity is critical due to its Schmitt-trigger architecture. The wide operating voltage range suits various power domains. Verify that the WQFN-16 package fits the available PCB real estate and thermal dissipation constraints for the application environment.

Shift Registers Part Context

This part belongs to the SN74HCS594 family of 8-bit shift registers. It shares functional characteristics with other variants like SN74HCS594DR but differs in packaging. The BQB suffix specifically denotes the WQFN-16 form factor used in space-constrained designs.

Shift Registers Replacement Considerations

SN74HCS594DYY

Shift Registers FAQ

How are unused inputs handled?

Unused inputs must be tied to either VCC or ground to prevent undefined operational states.

Can multiple devices be cascaded?

Yes, the serial output (QH') can connect to the serial input (SER) of subsequent devices for expanded I/O.