Nexperia USA Inc. 74LVC573AD,118

Overview

74LVC573AD,118 from Nexperia is an octal D-type transparent latch with 3-state outputs, latch enable (LE) and output enable (OE) controls, 1.2 V to 3.6 V supply operation, 5.5 V overvoltage-tolerant I/O, and -40 °C to +125 °C temperature rating. It serves as a bidirectional data latching and bus isolation interface in mixed-voltage digital systems such as industrial PLC I/O modules and FPGA peripheral expansion.

For engineers reviewing the 74LVC573AD,118 datasheet, 74LVC573AD,118 pinout, 74LVC573AD,118 application, or 74LVC573AD,118 equivalent, this device is selected for 8-bit parallel data capture with 3-state bus driving capability, Schmitt-trigger input noise immunity, IOFF partial power-down protection, and JEDEC-compliant voltage-level translation between 3.3 V and 5 V domains.

Technical Context

The 74LVC573AD implements eight independent D-latches with synchronous transparent mode (LE HIGH) and stored mode (LE LOW), where data is captured on the HIGH-to-LOW transition of LE. Each latch output feeds a separate 3-state buffer controlled solely by OE - enabling or disabling all outputs without affecting internal latch states.

Its IOFF circuitry ensures zero backflow current when VCC = 0 V, supporting hot-swap and partial power-down system architectures. Schmitt-trigger inputs provide hysteresis (typ. 0.3 V at VCC = 3.3 V), allowing reliable operation with slow-rising signals common in sensor interfaces and legacy TTL-driven buses.

Key Specifications

Pinout & Package

74LVC573AD,118 uses the SO20 (SOT163-1) package: plastic small outline, 20-pin, 7.5 mm body width, gull-wing leads, standard JEDEC MS-013 footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC573APWR and 74LVC573ABQ,115, the 74LVC573AD,118 offers proven manufacturability in SO20, higher mechanical robustness for industrial vibration, and simplified rework - making it optimal for cost-sensitive, high-reliability, medium-volume production.

Availability

74LVC573AD,118 is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and test equipment requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for 74LVC573AD,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 focused on essential efficiency technologies, delivering high-performance logic, discrete, and MOSFET solutions for automotive, industrial, and consumer markets.

The 74LVC573A series belongs to Nexperia's advanced LVC logic family, engineered specifically for low-voltage, mixed-signal interfacing with robust noise immunity, wide supply range, and seamless 3.3 V/5 V domain bridging.

FAQ

What is the maximum input voltage the 74LVC573AD,118 can tolerate while powered from 1.8 V?

The device accepts input voltages up to 5.5 V regardless of VCC level - confirmed in Table 5 (Recommended Operating Conditions) and Table 4 (Limiting Values). This overvoltage tolerance allows direct connection to 5 V sources without external clamping or level shifting, provided input current remains within ±50 mA limits.

Does the 74LVC573AD,118 support hot-swap insertion when VCC is unpowered?

Yes - its IOFF circuitry actively disables outputs and limits leakage to ≤±10 μA when VCC = 0 V, preventing back-current flow through powered downstream circuits. This feature is validated per JEDEC JESD78 and explicitly documented in Section 1 (General Description) and Table 9 (Static Characteristics).

How does the Schmitt-trigger input improve noise immunity compared to standard CMOS inputs?

Schmitt-trigger inputs provide ≥0.3 V hysteresis (measured at VCC = 3.3 V), meaning the rising and falling thresholds differ - e.g., VIH ≈ 2.0 V and VIL ≈ 0.8 V. This prevents multiple toggles on slow or noisy edges, eliminating need for external RC filters in applications like push-button interfaces or long-cable sensor links.

Can the 74LVC573AD,118 operate reliably at 1.2 V supply with full timing specifications?

Yes - all dynamic parameters including tpd (6.2 ns max), tsu (1.7 ns min), and th (1.4 ns min) are specified down to VCC = 1.2 V in Table 7, with measurement conditions defined in Table 9. The device maintains full functionality across its entire 1.2–3.6 V range, enabling ultra-low-power portable and battery-operated designs.