Nexperia USA Inc. 74AHC573PW,118

Overview

74AHC573PW,118 from Nexperia is an octal D-type transparent latch with 3-state outputs, designed for bus interface and data buffering in mixed-voltage digital systems. It features independent latch enable (LE) and output enable (OE) controls, 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 use as a level translator between 3.3 V and 5 V domains in microcontroller I/O expansion.

For engineers reviewing the 74AHC573PW,118 datasheet, 74AHC573PW,118 pinout, 74AHC573PW,118 application, or 74AHC573PW,118 equivalent, key selection criteria include propagation delay (≤6.8 ns at VCC = 5 V, CL = 15 pF), 3-state output drive capability (±8 mA), input overvoltage tolerance, Schmitt-trigger input hysteresis, and TSSOP20 package thermal performance for high-density PCB layouts.

Technical Context

This device implements eight independent D-type latches with transparent mode operation when LE is HIGH and edge-triggered capture on LE HIGH-to-LOW transition. Its dual control architecture separates data latching (LE) from output driver activation (OE), allowing independent timing management of data capture and bus release.

All inputs exhibit Schmitt-trigger action for noise immunity, and the CMOS input threshold (VIH ≥ 3.85 V at VCC = 5.5 V) ensures compatibility with standard 5 V TTL logic while maintaining low static current (ICC ≤ 4.0 μA typical at VCC = 5.5 V). The 3-state outputs support bidirectional bus sharing without contention.

Key Specifications

Pinout & Package

TSSOP20 package (SOT360-1): plastic thin shrink small outline, 20 leads, 4.4 mm body width, 0.65 mm pitch, 1.1 mm max height - optimized for automated assembly and thermal performance in space-constrained designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74AHCT573PW,118, the TTL-input variant offers better compatibility with legacy logic but sacrifices noise immunity in CMOS systems; SN74LV573APWR reduces supply flexibility and eliminates overvoltage tolerance, limiting its use to strictly 3.3 V applications.

Availability

74AHC573PW,118 is available at Aetrix Electronics and suitable for industrial automation, embedded microcontroller interfaces, and high-reliability data acquisition systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74AHC573PW,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, analog, and MOSFET solutions with focus on efficiency, reliability, and miniaturization for industrial, automotive, and computing markets.

The 74AHC series targets high-speed, low-power CMOS logic applications requiring wide supply range and robust noise immunity - specifically engineered for bus buffering, data latching, and voltage-domain bridging in modern embedded systems.

FAQ

Can 74AHC573PW,118 operate reliably at 2.0 V supply?

Yes. The device is fully specified from 2.0 V to 5.5 V, with guaranteed functionality including propagation delay (≤14.0 ns at VCC = 2.0 V, CL = 50 pF), output drive (±4 mA), and input thresholds (VIH ≥ 1.5 V). All DC and AC parameters in Table 5 and Table 7 are validated across this range.

What is the maximum capacitive load the outputs can drive?

The outputs are characterized up to 50 pF load capacitance per pin, with timing parameters (tpd, ten, tdis) explicitly specified for CL = 15 pF and CL = 50 pF in Table 7. Driving >50 pF may increase propagation delay and reduce edge rate but does not damage the device; external series termination is recommended for >75 pF.

Is the TSSOP20 package RoHS-compliant and lead-free?

Yes. The 74AHC573PW,118 uses a lead-free, halogen-free, RoHS-compliant TSSOP20 package (SOT360-1) with matte tin finish on terminals, meeting JEDEC J-STD-020 moisture sensitivity level 1 (MSL1) and IPC/JEDEC J-STD-006 solderability requirements.

How does the latch behave when LE and OE are both LOW?

When LE = LOW and OE = LOW, the device holds previously latched data on Q0–Q7 outputs in active-drive mode - i.e., outputs reflect stored Dn values and actively drive the bus. This is the "latch and read register" mode per Table 3, with no high-impedance behavior unless OE is asserted HIGH.