74LVC8T595BQX

Shift Registers Overview

The Nexperia 74LVC8T595BQX is a dual supply 8-bit serial-in/serial-out or parallel-out shift register with storage registers and 3-state outputs. It supports VCC(A) and VCC(B) voltages from 1.1 V to 5.5 V, enabling translation between nodes like 1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.3 V, and 5.0 V. Inputs are referenced to VCC(A), while Qn outputs reference VCC(B). The device includes IOFF circuitry for partial power-down applications and operates within -40 °C to +125 °C.

Shift Registers Feature Summary

• Dual supply architecture allows independent voltage domains for inputs and outputs
• IOFF circuitry prevents damaging backflow current during partial power-down
• Suspend mode isolates outputs when VCC(A) is at GND level
• High noise immunity with latch-up performance exceeding 100 mA

Shift Registers Applications

• Serial-to-parallel data conversion in mixed-voltage systems
• Parallel output expansion for microcontrollers
• Voltage node translation between different logic families
• Partial power-down management in portable electronics

Shift Registers Procurement Notes

Verify the BQ suffix indicates the DHVQFN20 package (SOT764-1) rather than TSSOP20. Confirm the 'X' designation aligns with manufacturer reel specifications. Ensure input/output voltage references match your system's VCC(A) and VCC(B) requirements before integration.

Shift Registers Selection Notes

Select this component when separate supply rails are required for control logic versus output loads. The dual-supply design facilitates interfacing between disparate voltage levels without external translators. Verify that the DHVQFN20 package fits your PCB footprint constraints and thermal dissipation needs.

Shift Registers Part Context

This part belongs to the 74LVC family of low-voltage CMOS logic devices. It functions as an 8-bit shift register with distinct shift and storage clocks. The BQ variant specifically utilizes a leadless DHVQFN package, offering a compact solution for space-constrained designs requiring robust voltage translation capabilities.

Shift Registers Replacement Considerations

Check for 74LVC8T595PW if TSSOP20 packaging is acceptable. Verify pinout compatibility for direct replacement. Ensure IOFF functionality matches system power-down requirements.