Nexperia USA Inc. 74HCT573PW-Q100,11

Overview

74HCT573PW-Q100 from Nexperia is an automotive-grade octal D-type transparent latch with 3-state outputs, designed for bus-oriented data latching in microprocessor I/O ports. It operates from 4.5 V to 5.5 V, supports -40 °C to +125 °C ambient range, features TTL-compatible inputs, and delivers propagation delay as low as 15 ns (VCC = 5 V, CL = 15 pF) in transparent mode.

For engineers reviewing the 74HCT573PW-Q100 datasheet, 74HCT573PW-Q100 pinout, 74HCT573PW-Q100 application, or 74HCT573PW-Q100 equivalent, key selection criteria include latch enable timing (tsu = 13 ns, th = 9 ns at VCC = 4.5 V), 3-state output drive capability (±6 mA), AEC-Q100 Grade 1 qualification, and TSSOP20 package compatibility with high-density PCB layouts.

Technical Context

This device implements eight independent D-type latches with shared LE (latch enable, active HIGH) and OE (output enable, active LOW) control signals. Its transparent latch behavior allows real-time data pass-through when LE is HIGH, while a HIGH-to-LOW LE transition captures and holds input states with setup/hold timing validated across automotive temperature extremes.

The 3-state outputs support bidirectional bus arbitration without external logic, and input clamp diodes enable safe interfacing to voltages exceeding VCC via current-limiting resistors - a critical feature for mixed-voltage automotive subsystems where microcontroller I/O may operate at different rail levels.

Key Specifications

Pinout & Package

TSSOP20 plastic thin shrink small outline package (SOT360-1), 20-lead, 4.4 mm body width, side-wettable flanks for AOI-compatible solder joint inspection.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HCT573D-Q100, the PW variant offers 35 % smaller PCB area and superior thermal performance in high-density modules; versus SN74HCT573QPWRQ1, it provides identical timing and drive strength but with Nexperia's side-wettable flank AOI advantage for SMT process control.

Availability

74HCT573PW-Q100 is available at Aetrix Electronics and suitable for automotive body control, engine management, ADAS sensor interface, and infotainment display applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HCT573PW-Q100 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, analog, and MOSFET solutions optimized for automotive, industrial, and mobile markets.

The 74HCT-Q100 series delivers AEC-Q100 qualified logic devices engineered specifically for automotive signal integrity, thermal resilience, and long-term reliability in harsh environments.

FAQ

What is the minimum setup time required for reliable data capture on the 74HCT573PW-Q100?

The guaranteed minimum setup time (tsu) is 13 ns at VCC = 4.5 V, measured from Dn transition to LE HIGH-to-LOW edge. This value is validated across -40 °C to +125 °C and ensures robust capture of asynchronous inputs in automotive microcontroller interfaces without additional synchronization logic.

Can the 74HCT573PW-Q100 interface directly with 3.3 V microcontrollers?

No - its TTL-compatible inputs require VIH ≥ 2.0 V (min) but are specified only for VCC = 4.5–5.5 V operation. Direct connection to 3.3 V MCUs risks violating input voltage limits; a level-shifting buffer or resistor-divider network is required for safe interoperability.

Does the OE pin affect internal latch state when activated?

No - asserting OE LOW places Q0–Q7 outputs into high-impedance mode without altering stored data in the latches. The internal state remains preserved and immediately reappears on the outputs when OE returns HIGH, enabling glitch-free bus sharing in multi-master systems.

What is the maximum capacitive load the 74HCT573PW-Q100 can drive while maintaining specified timing?

The device is characterized up to 50 pF load capacitance (CL) with guaranteed timing parameters. At CL = 50 pF and VCC = 4.5 V, propagation delay remains ≤44 ns and transition time ≤15 ns. Driving >50 pF increases delay nonlinearly and may violate setup/hold margins in high-speed buses.