Nexperia USA Inc. 74LVC595APW,118

Overview

74LVC595APW,118 from Nexperia is an 8-bit serial-in/parallel-out shift register with separate shift and storage clocks, 3-state outputs, asynchronous master reset (MR), and Schmitt-trigger inputs. It operates from 1.2 V to 3.6 V, accepts 5.5 V-tolerant inputs, and supports mixed-voltage interfacing between 3.3 V and 5 V systems. Used in LED matrix drivers and I/O expansion for microcontrollers.

For engineers reviewing the 74LVC595APW,118 datasheet, 74LVC595APW,118 pinout, 74LVC595APW,118 application, or 74LVC595APW,118 equivalent, key selection criteria include its dual-clock architecture (SHCP/STCP), IOFF partial power-down capability, -40 °C to +125 °C temperature range, TSSOP16 package, and 3-state output enable timing.

Technical Context

The device implements two independent 8-bit registers: an 8-stage shift register clocked by SHCP (LOW-to-HIGH) and an 8-bit storage latch clocked by STCP (LOW-to-HIGH). Data cascades via Q7S and loads into parallel outputs only upon STCP edge - enabling precise output update control. MR asynchronously clears the shift register without affecting the storage register.

Inputs feature Schmitt-trigger action for noise immunity on slow-rising signals, and IOFF circuitry disables outputs during power-down to prevent backflow current. Overvoltage tolerance (5.5 V) allows direct interface with 5 V logic while powered at 1.65–3.6 V.

Key Specifications

Pinout & Package

TSSOP16 plastic thin shrink small outline package (SOT403-1); 16 leads; body width 4.4 mm; 0.65 mm pitch; exposed pad not electrically connected.

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 74LVCH16374ADGG, the 74LVC595APW,118 uniquely combines 5.5 V-tolerant inputs, IOFF protection, dual-clock isolation, and extended temperature range - making it the only option qualified for automotive body electronics and industrial hot-swap I/O expansion.

Availability

74LVC595APW,118 is available at Aetrix Electronics and suitable for LED matrix drivers, MCU I/O expansion, industrial sensor interfaces, and automotive body control modules requiring stable component supply across extended temperature ranges.

Supply support for 74LVC595APW,118 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 logic, analog, and MOSFET solutions optimized for efficiency, reliability, and miniaturization.

The 74LVC595A belongs to Nexperia's LVC logic family, designed specifically for low-voltage, mixed-signal interfacing in space-constrained industrial and automotive applications where voltage translation and power integrity are critical.

FAQ

What is the function of the MR (master reset) pin?

The MR pin is an asynchronous active-LOW input that resets only the 8-bit shift register to zero - leaving the storage register and parallel outputs (Q0–Q7) unchanged. It does not affect the state of the storage register or output enable logic, and has no impact on Q7S timing beyond clearing the shift chain.

Can SHCP and STCP be tied together in a single-clock design?

Yes, but doing so causes the shift register to always lead the storage register by one clock pulse - meaning the parallel outputs reflect data shifted in one cycle earlier. This configuration sacrifices output update determinism and is not recommended for glitch-sensitive applications like LED multiplexing.

How does the IOFF feature protect the device during power-down?

When VCC drops to 0 V, the IOFF circuitry forces all outputs (Q0–Q7) into high-impedance state regardless of OE, MR, or clock states - blocking reverse current flow from powered downstream circuits (e.g., 5 V buses) into the unpowered IC, thereby preventing latch-up or damage.

What is the maximum capacitive load the Qn outputs can drive reliably?

The outputs are characterized up to 50 pF load capacitance (per Table 9 test conditions). Driving >50 pF may increase propagation delay and reduce edge rate; for >100 pF loads, external series termination or buffer amplification is recommended to maintain timing compliance and signal integrity.