Nexperia USA Inc. 74LVC595ABQ,115

Overview

74LVC595ABQ,115 from Nexperia is an 8-bit serial-in/parallel-out shift register with separate shift and storage clocks (SHCP/STCP), 3-state outputs (enabled by active-low OE), asynchronous master reset (MR), and cascading-capable serial output (Q7S). It operates from 1.2 V to 3.6 V, tolerates 5.5 V inputs, and supports -40 °C to +125 °C ambient temperature - used in LED matrix drivers and microcontroller GPIO expansion.

For engineers reviewing the 74LVC595ABQ,115 datasheet, 74LVC595ABQ,115 pinout, 74LVC595ABQ,115 application, or 74LVC595ABQ,115 equivalent, this device delivers deterministic serial-to-parallel conversion with Schmitt-trigger inputs, IOFF partial power-down protection, and precise timing control for synchronized data latching in mixed-voltage systems.

Technical Context

The 74LVC595ABQ implements dual-register architecture: an 8-stage shift register accepts serial data on SHCP rising edges and feeds Q7S for daisy-chaining; a parallel storage register captures shift register contents on STCP rising edges. Outputs Q0–Q7 reflect storage register state only when OE is LOW.

Its IOFF circuit disables outputs during power-down to prevent backflow current; Schmitt-trigger inputs tolerate slow-rising signals; overvoltage-tolerant inputs (to 5.5 V) enable direct interfacing with 5 V logic while powered at 1.65–3.6 V.

Key Specifications

Pinout & Package

DHVQFN16 package (SOT763-1): 2.5 × 3.5 × 0.85 mm body, 16-terminal leadless quad flat design with exposed thermal pad; optimized for space-constrained PCBs and enhanced thermal dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit serial-in/parallel-out shift register applications.

Compared with SN74HC595PWR and 74LV595PW,118, the 74LVC595ABQ,115 uniquely combines 1.2 V operation, 5.5 V input tolerance, IOFF protection, and sub-8 ns propagation delay - making it optimal for modern low-voltage, mixed-signal, and safety-critical embedded designs.

Availability

74LVC595ABQ,115 is available at Aetrix Electronics and suitable for LED matrix drivers, microcontroller GPIO expansion, industrial sensor interfaces, and automotive body control modules requiring stable component supply across extended temperature ranges.

Supply support for 74LVC595ABQ,115 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Nexperia is a global semiconductor expert delivering high-performance, reliable components for automotive, industrial, and consumer electronics - with leadership in logic, power MOSFETs, and ESD protection.

The 74LVC595ABQ,115 belongs to Nexperia's LVC logic family, engineered for low-voltage operation, mixed-signal compatibility, and robust performance in space- and power-constrained embedded systems.

FAQ

Can 74LVC595ABQ,115 operate at 1.8 V while interfacing with 5 V sensors?

Yes. Its inputs tolerate up to 5.5 V regardless of VCC, and its 1.2 V–3.6 V supply range includes 1.8 V operation. This allows direct connection to 5 V sensor outputs using only a series resistor for current limiting - no external level shifter needed. Static characteristics (VIH/VIL) are guaranteed across the full VCC range.

What happens to outputs during power-down if OE remains LOW?

When VCC drops to 0 V, the IOFF circuit forces all Q0–Q7 outputs into high-impedance state regardless of OE logic level. This prevents back-current flow from other powered system components into the unpowered IC - a critical safety feature for hot-swap and partial-power-down architectures.

How does the dual-clock architecture improve timing reliability?

Separate SHCP and STCP inputs eliminate setup/hold conflicts between serial loading and parallel output update. Data shifts into the shift register on SHCP edges, then transfers atomically to outputs on STCP edges - enabling pipelined operation where new data loads while previous data drives outputs, reducing effective latency by one clock cycle.

Is the thermal pad on the DHVQFN16 package required to be soldered?

No. Per Nexperia SOT763-1 specification, the exposed thermal pad (Pin 1) has no electrical or mechanical requirement to be soldered. If soldered, it must remain electrically floating or be connected to GND - never left as a floating copper island, which could cause EMI or thermal stress issues.