Nexperia USA Inc. 74LVC573APW,118

Overview

74LVC573APW,118 from Nexperia is an octal D-type transparent latch with 3-state outputs, latch enable (LE) and output enable (OE) control, 1.2 V to 3.6 V supply operation, 5.5 V overvoltage-tolerant I/O, and Schmitt-trigger inputs for noise immunity-used in bus interface and level translation between 3.3 V and 5 V domains in industrial microcontroller systems.

For engineers reviewing the 74LVC573APW,118 datasheet, 74LVC573APW,118 pinout, 74LVC573APW,118 application, or 74LVC573APW,118 equivalent, this device serves as a bidirectional 8-bit data latch with IOFF partial power-down protection, high-impedance output control, and flow-through pinout for PCB routing efficiency in mixed-voltage digital logic designs.

Technical Context

The 74LVC573APW operates as a transparent latch: when LE is HIGH, Qn follows Dn in real time; when LE transitions LOW, the input state is latched. OE independently controls 3-state output enable/disable without affecting latch state. This decoupling enables independent data capture and bus release timing.

All inputs feature Schmitt-trigger action for robust handling of slow-rising signals, and the IOFF circuit ensures zero backflow current when VCC = 0 V-critical for hot-swap and partial-power-down systems. Inputs tolerate up to 5.5 V regardless of VCC (1.2–3.6 V), enabling seamless 3.3 V ↔ 5 V voltage translation.

Key Specifications

Pinout & Package

TSSOP20 plastic thin shrink small outline package (SOT360-1), 20-pin, 4.4 mm body width, 0.65 mm pitch, exposed thermal pad (non-electrical).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal transparent latch applications.

Compared with SN74LVC573AQPWRQ1, the 74LVC573APW,118 offers lower cost and broader temperature range (−40 °C to +125 °C vs. +105 °C), while the 74LVCH16373ADGG trades pin-efficiency and static power for scalability-making the 74LVC573APW optimal for cost-sensitive, thermally demanding 8-bit industrial interfaces.

Availability

74LVC573APW,118 is available at Aetrix Electronics and suitable for industrial PLCs, microcontroller bus expansion, mixed-voltage level translation, and hot-swappable module control requiring stable component supply across extended temperature and long-lifecycle programs.

Supply support for 74LVC573APW,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, discrete, and MOSFET solutions optimized for efficiency, reliability, and miniaturization in industrial, automotive, and consumer electronics.

The 74LVC573A series belongs to Nexperia's advanced LVC logic family-designed specifically for low-voltage, high-noise-immunity, mixed-supply digital interfacing in space- and power-constrained embedded systems.

FAQ

Can 74LVC573APW,118 operate with VCC = 1.2 V while driving 5 V-tolerant loads?

Yes. At VCC = 1.2 V, the device maintains full 5.5 V input tolerance and high-impedance output state up to 5.5 V. However, output drive strength drops significantly below 1.65 V-VOH falls to 1.08 V (min) and VOL rises to 0.12 V (max), limiting usable fan-out in low-VCC operation. For reliable 5 V load interfacing, VCC ≥ 1.65 V is recommended.

What is the minimum pulse width required on LE for reliable latching?

The minimum LE HIGH pulse width is 3.2 ns at VCC = 3.0–3.6 V, per Table 7. Below 3.2 ns, setup/hold timing margins erode, risking metastability or incomplete latch capture. At lower VCC (e.g., 1.65 V), minimum pulse width increases to 5.0 ns. Always maintain ≥ 2× margin (≥6.4 ns) in production designs for robustness across voltage/temp corners.

Does OE assertion affect the internal latch state when LE is LOW?

No. The OE input controls only the output driver stage and has no effect on the internal latch storage elements. When LE is LOW and OE is asserted (LOW), the stored data remains intact in the latch; outputs simply enter high-impedance. Releasing OE restores the latched Qn values immediately-enabling glitch-free bus sharing.

How does the IOFF circuit behave during power ramp-up or ramp-down?

IOFF activates automatically when VCC drops below ~0.8 V and deactivates when VCC exceeds ~1.0 V. During ramp-down, IOFF engages before outputs lose drive capability-blocking reverse current. During ramp-up, IOFF disengages only after VCC stabilizes above threshold, ensuring outputs remain disabled until supply is valid. No external control is needed.