Nexperia USA Inc. 74AHC373PW,118

Overview

74AHC373PW,118 from Nexperia is an octal D-type transparent latch with 3-state outputs in TSSOP20 package, operating from 2.0 V to 5.5 V supply, featuring latch enable (LE) and output enable (OE) inputs, overvoltage-tolerant inputs up to 5.5 V, and specified for -40 °C to +125 °C industrial temperature range. It serves as a bidirectional data latching and bus isolation interface in microcontroller peripheral expansion and memory address/data buffering.

For engineers reviewing the 74AHC373PW,118 datasheet, 74AHC373PW,118 pinout, 74AHC373PW,118 application, or 74AHC373PW,118 equivalent, key selection criteria include propagation delay (≤9.0 ns at 5 V/15 pF), 3-state output control timing (enable/disable ≤13.0 ns), input overvoltage tolerance, Schmitt-trigger input action, and thermal derating behavior for TSSOP20 packaging.

Technical Context

The device implements eight independent D-type latches with synchronous transparency controlled by LE: when LE is HIGH, Qn follows Dn in real time; when LE transitions LOW, the last valid Dn state is captured and held. OE operates independently to place all outputs in high-impedance state without affecting latch contents.

Inputs accept voltages up to 5.5 V regardless of VCC level, enabling mixed-voltage translation between 3.3 V logic domains and 5 V buses. All inputs feature Schmitt-trigger action for noise immunity, and static characteristics are guaranteed across -40 °C to +125 °C with VIH ≥3.85 V and VOL ≤0.55 V at 8 mA sink current under worst-case conditions.

Key Specifications

Pinout & Package

TSSOP20 package (SOT360-1): plastic thin shrink small outline, 20 leads, body width 4.4 mm, 0.65 mm pitch, lead finish matte tin, RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC373APW and 74HC373PW, the 74AHC373PW,118 uniquely balances 5.5 V overvoltage tolerance, Schmitt-trigger noise immunity, and sub-10 ns propagation at 5 V - making it optimal for robust industrial bus interfacing where voltage domain mixing and EMI resilience are non-negotiable.

Availability

74AHC373PW,118 is available at Aetrix Electronics and suitable for microcontroller I/O expansion, memory address latching, and industrial bus isolation requiring stable component supply across extended temperature ranges and mixed-voltage environments.

Supply support for 74AHC373PW,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 discrete components optimized for efficiency, reliability, and miniaturization in industrial, automotive, and consumer applications.

The 74AHC series targets high-speed, low-power CMOS logic applications demanding wide supply range, robust noise immunity, and extended temperature operation - specifically engineered for industrial control, instrumentation, and legacy system upgrades.

FAQ

Can 74AHC373PW,118 operate with VCC = 2.5 V while accepting 5 V inputs?

Yes. The device supports VCC from 2.0 V to 5.5 V and features overvoltage-tolerant inputs rated to 5.5 V regardless of VCC level. At VCC = 2.5 V, inputs may swing from 0 V to 5.5 V without damage or functional degradation, enabling safe level translation between 2.5 V logic domains and 5 V peripherals.

What is the minimum pulse width required on LE for reliable latching?

The minimum LE HIGH pulse width is 5.0 ns across the full operating range (VCC = 3.0–3.6 V or 4.5–5.5 V). This ensures sufficient time for internal metastability resolution and deterministic capture of D-input states prior to the HIGH-to-LOW transition that freezes the latch contents.

How does the TSSOP20 package affect thermal performance compared to SO20?

The SOT360-1 (TSSOP20) package has a thermal resistance θJA of ~100 K/W and derates linearly at 10.0 mW/K above 100 °C, whereas SO20 (SOT163-1) derates at 12.3 mW/K above 109 °C. TSSOP20 offers better board-level heat spreading due to exposed pad compatibility but requires tighter layout control for solder joint reliability.

Is there a risk of bus contention when OE is toggled during active latching?

No. OE controls only the output driver stage and has no effect on internal latch states. Outputs transition cleanly between driven and high-impedance states with defined enable/disable times (≤13.0 ns), and the latch retains stored data regardless of OE state - ensuring glitch-free bus arbitration in multi-master systems.