74LVC595ABQ,115

Shift Registers Overview

The Nexperia 74LVC595ABQ,115 is an 8-bit serial-in/serial-out or parallel-out shift register with a storage register and 3-state outputs. It operates on a supply voltage range of 1.2 V to 3.6 V and features overvoltage tolerant inputs up to 5.5 V. The device includes IOFF circuitry for partial power-down applications, preventing backflow current. It utilizes separate clocks for the shift and storage registers and provides Schmitt-trigger action at all inputs.

Shift Registers Feature Summary

• Features IOFF circuitry that disables outputs during partial power-down to prevent potentially damaging backflow current through the device.
• Includes Schmitt-trigger action at all inputs, making the circuit tolerant of slower input rise and fall times.
• Inputs are overvoltage tolerant up to 5.5 V, allowing direct interface with TTL levels and use in mixed 3.3 V and 5 V environments.

Shift Registers Applications

• Serial-to-parallel data conversion
• Remote control holding register

Shift Registers Procurement Notes

Verify the specific ordering suffix '115' corresponds to the DHVQFN16 (SOT763-1) package variant when sourcing. Confirm the temperature range specification matches the required operational environment, as this part is specified from -40 °C to +125 °C. Ensure compatibility with the target PCB footprint dimensions of 2.5 × 3.5 mm.

Shift Registers Selection Notes

Select this component when a low-power CMOS shift register with 3-state outputs is required in a space-constrained design. The DHVQFN16 package offers a thermal enhanced very thin quad flat form factor suitable for surface mount applications. Consider the wide supply voltage range and overvoltage tolerance if interfacing with mixed-voltage logic systems.

Shift Registers Part Context

This component belongs to the 74LVC595A family of 8-bit shift registers manufactured by Nexperia USA Inc. The ABQ designation specifically identifies the DHVQFN16 plastic dual in-line compatible thermal enhanced very thin quad flat package version without leads. It shares functional characteristics with other packages like SO16 and TSSOP16 within the same series.

Shift Registers Replacement Considerations

Public confirmed substitute part numbers include 74LVC595AD,118 (SO16 package) and 74LVC595APW (TSSOP16 package). These variants share identical electrical functionality but differ in physical package dimensions and pinout orientation relative to the board layout.

Shift Registers FAQ

How does the IOFF circuitry function?

The IOFF circuitry disables the output when the device is powered down, preventing potentially damaging backflow current through the device.

What is the purpose of the MR input?

The MR (Master Reset) input is asynchronous and active LOW; applying a LOW state resets the shift register.