Nexperia USA Inc. 74AHC573D-Q100J

Overview

74AHC573D-Q100 from Nexperia is an automotive-grade octal D-type transparent latch with 3-state outputs, designed for bus interface and data buffering in mixed-voltage automotive systems. It features latch enable (LE) and output enable (OE) inputs, operates from 2.0 V to 5.5 V, supports -40 °C to +125 °C ambient range, and provides overvoltage-tolerant inputs up to 5.5 V - enabling level translation between 3.3 V and 5 V domains in engine control units.

For engineers reviewing the 74AHC573D-Q100 datasheet, 74AHC573D-Q100 pinout, 74AHC573D-Q100 application, or 74AHC573D-Q100 equivalent, this device is selected for deterministic data capture in high-noise automotive environments where latch transparency, fast propagation delay (as low as 3.9 ns at 5 V), and AEC-Q100 Grade 1 qualification are mandatory.

Technical Context

This latch implements eight independent D-type flip-flops with synchronous transparent operation: when LE is HIGH, Qn follows Dn in real time; when LE transitions LOW, the input state is latched. OE operates independently to place all outputs in high-impedance mode without affecting internal latch states.

Its CMOS input structure (74AHC variant) ensures compatibility with 3.3 V logic while tolerating 5.5 V inputs, and Schmitt-trigger action on all inputs improves noise immunity in electrically harsh vehicle subsystems such as body control modules and ADAS sensor interfaces.

Key Specifications

Pinout & Package

74AHC573D-Q100 uses the SO20 (SOT163-1) package: plastic small outline, 20 leads, 7.5 mm body width, gull-wing leads, JEDEC MS-013 compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74AHCT573D-Q100, the subject part offers superior noise immunity and lower static power in 3.3 V systems; versus SN74LV573AQPWRQ1, it delivers stronger input robustness and tighter propagation delay consistency across temperature - critical for deterministic timing in engine management.

Availability

74AHC573D-Q100 is available at Aetrix Electronics and suitable for engine control units, body control modules, and ADAS sensor hubs requiring stable component supply across automotive production lifecycles.

Supply support for 74AHC573D-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, reliable, and scalable logic, power, and analog components.

The 74AHC-Q100 series targets automotive electronics, engineered specifically for functional safety-critical subsystems requiring AEC-Q100 qualification, wide temperature operation, and robust EMC performance.

FAQ

What is the maximum clock frequency supported by 74AHC573D-Q100?

The device does not operate on a clock signal - it is a transparent latch controlled by level-sensitive LE and OE inputs. Its usable data rate depends on propagation delay (as low as 3.9 ns) and setup/hold times (3.5 ns/1.5 ns). For repetitive latching, minimum LE pulse width is 5.0 ns, supporting effective sampling rates up to 100 MHz in optimized layouts with matched trace lengths.

Can 74AHC573D-Q100 interface directly with 5 V microcontrollers while powered at 3.3 V?

Yes - its inputs are overvoltage tolerant to 5.5 V regardless of VCC. When VCC = 3.3 V, D0–D7 accept 0–5 V logic levels without damage or external protection. Output levels remain 3.3 V referenced (VOH ≈ 3.1 V @ 4 mA), so external level shifting is required only if driving 5 V inputs.

Is the SO20 package (SOT163-1) lead-free and RoHS-compliant?

Yes - 74AHC573D-Q100 is manufactured in full compliance with RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. The SOT163-1 package uses matte tin (Sn) lead finish with no lead content exceeding 0.1 wt%, verified per J-STD-020 moisture sensitivity level 3 (MSL3) reflow profile.

How does the latch behavior differ from a flip-flop in system design?

Unlike edge-triggered flip-flops, this latch is level-sensitive: data passes through continuously while LE = HIGH (transparent mode), then freezes on LE HIGH-to-LOW transition. This enables asynchronous capture of burst data (e.g., ADC samples) without requiring precise clock alignment - but demands careful timing control to avoid glitches during LE assertion.