Nexperia USA Inc. 74HC373PW,118

Overview

74HC373PW,118 from Nexperia is an octal D-type transparent latch with 3-state outputs, used for bus-oriented data latching in digital systems. It features independent latch enable (LE, active HIGH) and output enable (OE, active LOW), operates from 2.0 V to 6.0 V, supports -40 °C to +125 °C, and delivers 15 ns typical propagation delay at 4.5 V. It is commonly deployed in microcontroller address/data bus buffering and legacy parallel interface isolation.

For engineers reviewing the 74HC373PW,118 datasheet, 74HC373PW,118 pinout, 74HC373PW,118 application, or 74HC373PW,118 equivalent, this page provides verified functional behavior, TSSOP20 package mapping, real-world timing constraints (e.g., 12 ns min tpd at 6.0 V), latch transparency vs. storage mode behavior, and validated alternatives for industrial control and embedded bus management.

Technical Context

The 74HC373PW,118 implements eight independent D-type latches with shared LE and OE controls. Its CMOS architecture ensures low static current (≤160 μA at 125 °C) and high noise immunity, while input clamp diodes allow safe interfacing to voltages exceeding VCC when used with current-limiting resistors.

Latch operation is strictly level-sensitive: LE HIGH enables transparency (Qn follows Dn), LE LOW captures and holds the Dn state at the preceding setup time. OE independently places all eight outputs in high-impedance mode without affecting internal latch states.

Key Specifications

Pinout & Package

TSSOP20 plastic thin shrink small outline package (SOT360-1); 20 leads; body width 4.4 mm; 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 74HCT373PW,118, the 74HC373PW,118 offers superior noise margin in pure CMOS systems but requires level translation for TTL inputs; versus SN74HC373PWR, it provides higher ESD robustness and identical thermal performance in TSSOP20, making it preferable for harsh industrial environments.

Availability

74HC373PW,118 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, microcontroller bus demultiplexing, legacy parallel interface bridging, and test equipment signal conditioning requiring stable component supply across extended temperature ranges.

Supply support for 74HC373PW,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 leading semiconductor manufacturer specializing in high-performance logic, discrete, and MOSFET solutions, with core expertise in reliability, efficiency, and miniaturization for industrial and automotive markets.

The 74HC373PW,118 belongs to Nexperia's HC-series high-speed CMOS logic family, designed specifically for robust, low-power bus interface and data latching in space-constrained industrial control and embedded systems.

FAQ

What is the minimum pulse width required on the LE input to reliably capture data?

The LE input requires a minimum HIGH pulse width of 16 ns at VCC = 4.5 V (per Table 7). This ensures sufficient time for internal metastability resolution and reliable sampling of Dn inputs. At 6.0 V, the minimum is 14 ns. Shorter pulses risk incomplete latching or indeterminate output states, especially near temperature extremes.

Can OE be toggled while LE is HIGH without corrupting latched data?

Yes. OE controls only the output buffer stage and has no effect on internal latch states. When LE is HIGH (transparent mode), toggling OE will immediately place outputs in high-impedance or drive mode while Qn continues to follow Dn. Data integrity is preserved because latch storage is fully decoupled from output enable logic.

How does the 74HC373PW,118 handle input voltages exceeding VCC?

Inputs include integrated clamp diodes to VCC and GND. Voltages up to VCC + 0.5 V are safely clamped; beyond that, external current-limiting resistors (e.g., 10 kΩ) must be used to restrict IIK to ≤±20 mA (per Table 4). This enables direct interfacing with 12 V control signals in industrial settings without external protection circuitry.

Is there a recommended PCB layout practice for minimizing ground bounce on the TSSOP20 package?

Place a 100 nF X7R ceramic capacitor between pins 2 and 20 (VCC) and connect both to a solid ground plane via multiple vias near the package. Route GND (pin 10) directly to the same plane with minimal trace length. Avoid routing high-speed signals beneath the IC to prevent coupling into the ground reference.