Nexperia USA Inc. 74AHCT573PW,112

Overview

74AHCT573PW,112 from NXP Semiconductors is an octal D-type transparent latch with 3-state outputs, designed for bus-oriented applications requiring bidirectional data flow control. It operates at 4.5–5.5 V supply, features 8 ns propagation delay at 5 V, and supports ±24 mA output drive. It is used in microcontroller peripheral interfacing where data latching and bus isolation are required.

For engineers reviewing the 74AHCT573PW,112 datasheet, 74AHCT573PW,112 pinout, 74AHCT573PW,112 application, or 74AHCT573PW,112 equivalent, key selection criteria include output drive strength, propagation delay vs. supply voltage, 3-state enable timing, and TSSOP-20 thermal performance in high-density PCB layouts.

Technical Context

This latch uses CMOS technology with TTL-compatible inputs, enabling direct interface with legacy 5 V logic families. Its transparent mode allows real-time data pass-through while OE is inactive; when OE is asserted, outputs enter high-impedance state independent of LE status.

The device implements non-inverting data storage: input data appears at Q outputs during LE high, and holds that value after LE transitions low. All outputs share a single active-low Output Enable (OE) signal, enabling synchronized bus release across all eight channels.

Key Specifications

Pinout & Package

TSSOP-20 package: 20-pin thin shrink small outline package with 0.65 mm pitch, 6.5 mm × 4.4 mm body, and exposed pad for thermal enhancement (not electrically connected).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74AHCT573PWRE4, the 74AHCT573PW,112 offers tighter propagation delay tolerance critical for 5 V bus timing closure; versus 74LVC573APW,118, it provides native 5 V interoperability but consumes ~15% more static current in active mode.

Availability

74AHCT573PW,112 is available at Aetrix Electronics and suitable for industrial automation controllers, test equipment signal conditioning, and legacy system upgrades requiring stable component supply and long-term lifecycle support.

Supply support for 74AHCT573PW,112 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

NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.

The 74AHCT series targets industrial-grade logic interfacing, delivering TTL-compatible performance with CMOS efficiency for mission-critical control and data path applications.

FAQ

What is the maximum clock frequency supported by 74AHCT573PW,112?

The device does not operate on a clock signal; it is edge-triggered only on the Latch Enable (LE) input. Maximum usable data rate depends on propagation delay (8 ns max) and setup/hold timing. For reliable transparent-mode operation, input data must be stable ≥2.5 ns before LE high-to-low transition, enabling effective use in 100 MHz bus systems with proper timing margin.

Can 74AHCT573PW,112 drive LED arrays directly?

No. While its ±24 mA output drive exceeds typical LED forward current (10–20 mA), the device lacks current-limiting capability and is not rated for continuous DC sink/source into low-impedance loads. Direct LED driving risks exceeding SOA limits and causing thermal runaway. Use external current-limiting resistors or dedicated LED drivers for safe operation.

Is 74AHCT573PW,112 compatible with 3.3 V microcontrollers?

Inputs are TTL-compatible (VIH = 2.0 V min), so 3.3 V logic outputs can reliably drive them. However, outputs swing to 5 V when VCC = 5 V, making direct connection to 3.3 V-only inputs unsafe without level translation. For mixed-voltage systems, use series resistors or dedicated translators like TXB0108 to prevent overvoltage damage.

Does this device have built-in ESD protection?

Yes. The 74AHCT573PW,112 includes on-chip ESD protection diodes rated per HBM (Human Body Model) at ±2000 V and per CDM (Charged Device Model) at ±1000 V. These meet JEDEC JS-001 and JS-002 standards, providing adequate protection for board-level handling and normal operating conditions-but external TVS devices are still recommended for I/O lines exposed to industrial surge environments.