Nexperia USA Inc. 74HCT373PW,118

Overview

74HCT373PW,118 from Nexperia is an octal D-type transparent latch with 3-state outputs, designed for bus-oriented digital systems requiring data latching and controlled output isolation. It features TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 5 V), operates from 4.5 V to 5.5 V, supports -40 °C to +125 °C ambient range, and delivers 17 ns typical propagation delay (Dn→Qn) at VCC = 4.5 V. It is used in microcontroller address/data bus buffering and memory interface control.

For engineers reviewing the 74HCT373PW,118 datasheet, 74HCT373PW,118 pinout, 74HCT373PW,118 application, or 74HCT373PW,118 equivalent, this device serves as a critical bus latch in industrial control logic, embedded system I/O expansion, and legacy parallel interface designs where precise timing, 3-state bus contention management, and TTL-level compatibility are required.

Technical Context

The 74HCT373PW,118 implements eight independent D-type latches with shared active-HIGH latch enable (LE) and active-LOW 3-state output enable (OE). Its TTL-compatible inputs allow direct interfacing with 5 V logic families without level shifting, while its CMOS output stage provides rail-to-rail swing and high noise immunity.

Latching occurs on the HIGH-to-LOW transition of LE, capturing D-input states with 12 ns minimum setup time and 4 ns minimum hold time at VCC = 4.5 V. OE operates independently-asserting it places all Q0–Q7 outputs in high-impedance state without altering internal latch values.

Key Specifications

Pinout & Package

TSSOP20 package (SOT360-1): 20-pin thin shrink small outline, 4.4 mm body width, 0.65 mm pitch, exposed pad not electrically connected.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HCT373D,653, the 74HCT373PW,118 offers 35 % smaller PCB area and superior thermal performance in compact enclosures; versus SN74HCT373PWR, it delivers lower quiescent current and tighter input threshold consistency across voltage and temperature.

Availability

74HCT373PW,118 is available at Aetrix Electronics and suitable for industrial bus buffering, microcontroller I/O expansion, legacy printer interfaces, and programmable logic control requiring stable component supply across extended temperature ranges.

Supply support for 74HCT373PW,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 specializing in high-performance, energy-efficient logic, analog, and discrete components for automotive, industrial, and consumer markets.

The 74HCT373PW,118 belongs to Nexperia's 74HCT logic family, engineered specifically for TTL-compatible interfacing in noise-prone industrial environments with guaranteed operation from -40 °C to +125 °C.

FAQ

What is the maximum clock frequency supported by the 74HCT373PW,118?

The 74HCT373PW,118 is not a clocked register but a transparent latch: its speed is defined by propagation delay (17 ns typ Dn→Qn) and setup/hold times (12 ns / 4 ns). In practice, it supports reliable operation in bus systems up to ~25 MHz when used with appropriate timing margins and load capacitance ≤50 pF.

Can OE and LE be driven by the same control signal?

No-OE is active-LOW and LE is active-HIGH, so driving them with the same signal would cause simultaneous enable and disable conflict. They must be controlled separately: LE manages data capture timing, while OE controls bus release. Typical use pairs LE with address strobe and OE with chip select.

Does the 74HCT373PW,118 require external pull-up resistors on its outputs?

No-its 3-state outputs have no internal pull-ups. When OE is HIGH, outputs float into high-impedance state; external pull-ups are only needed if a defined logic level is required during bus idle periods, and their value must be selected based on bus capacitance and rise-time requirements.

Is the exposed pad on the TSSOP20 package electrically connected?

No-the exposed pad in SOT360-1 is a thermal pad with no electrical connection. Nexperia specifies it should remain floating or be connected to GND only if soldered; doing so improves thermal dissipation but requires careful PCB layout to avoid shorting adjacent pins.