NXP Semiconductors 74HCT03PW,118

Overview

74HCT03PW,118 from Nexperia is a quad 2-input NAND gate IC with open-drain outputs, designed for level-translating wired-AND logic and bus interface applications in mixed-voltage systems. It operates from 4.5 V to 5.5 V, delivers TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max), supports -40 °C to +125 °C ambient operation, and features 14-pin TSSOP packaging for high-density PCB layouts.

For engineers reviewing the 74HCT03PW,118 datasheet, 74HCT03PW,118 pinout, 74HCT03PW,118 application, or 74HCT03PW,118 equivalent, this device is selected for robust open-drain bus arbitration, I²C-compatible signal conditioning, and voltage-level translation between 3.3 V and 5 V domains where sink-current capability and noise immunity are critical.

Technical Context

The 74HCT03PW,118 implements four independent NAND gates, each with an open-drain output requiring external pull-up resistors to define logic HIGH levels. Its TTL-compatible inputs accept standard 5 V logic thresholds while operating on a 5 V supply, enabling direct interfacing with legacy microcontrollers and peripheral drivers without level-shifting circuitry.

Each gate exhibits propagation delays of 12 ns (typ) to 36 ns (max) at VCC = 4.5 V and CL = 50 pF, with transition times under 22 ns (max). Input clamping diodes allow safe interfacing to voltages exceeding VCC when used with current-limiting resistors, supporting mixed-supply system interconnects.

Key Specifications

Pinout & Package

TSSOP14 plastic thin shrink small outline package (SOT402-1); 14 leads; body width 4.4 mm; lead pitch 0.65 mm; moisture sensitivity level MSL3.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad NAND gate with open-drain output applications.

Compared with 74HCT03PW,118, the SO14 variant offers easier handling but lower power density, while the TI alternative provides superior ESD margin at the cost of vendor-specific supply chain constraints and minor VOL improvement not critical for standard I²C operation.

Availability

74HCT03PW,118 is available at Aetrix Electronics and suitable for industrial bus arbitration, I²C signal conditioning, and legacy peripheral interface applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HCT03PW,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 optimized for efficiency, reliability, and miniaturization in industrial and consumer electronics.

The 74HCT03 belongs to Nexperia's industry-standard 74HCT logic family, engineered for seamless interoperability with TTL systems while leveraging CMOS power efficiency and noise immunity in mixed-voltage embedded control applications.

FAQ

Can 74HCT03PW,118 operate with a 3.3 V supply?

No. The 74HCT03PW,118 is specified only for 4.5 V to 5.5 V operation. Its TTL-compatible inputs require VIH ≥ 2.0 V, but the internal CMOS structure is not characterized below 4.5 V. For 3.3 V systems, use the 74LVC03 or 74AHC03 variants instead, which support lower VCC and retain open-drain outputs.

What pull-up resistor value should be used with the open-drain outputs?

A 4.7 kΩ resistor to 5 V is typical, yielding ~1 mA sink current and ensuring VOL ≤ 0.4 V per datasheet conditions. For faster rise times in I²C applications, values from 1 kΩ to 10 kΩ may be selected based on bus capacitance and speed grade (standard/fast-mode), with verification against maximum IO = 4 mA limit.

Does 74HCT03PW,118 support hot-swap or live-insertion?

No. The device lacks explicit hot-swap protection features such as slew-rate controlled outputs or undervoltage lockout. Input clamp diodes provide limited overvoltage tolerance, but insertion into a live 5 V bus risks latch-up or transient overstress unless current-limiting resistors are used on all inputs and outputs.

How does the 74HCT03 differ from the 74HC03 in practical design?

The 74HCT03 uses TTL-compatible input thresholds (VIH ≥ 2.0 V), making it ideal for interfacing with 5 V microcontrollers and legacy logic. The 74HC03 uses CMOS thresholds (VIH ≈ 0.7×VCC), requiring ≥3.5 V input for reliable HIGH detection at 5 V - limiting its use with marginal or noisy 5 V signals. Both share identical open-drain outputs and package options.