Nexperia USA Inc. 74HCT02PW/S400,118

Overview

74HCT02PW/S400,118 from Nexperia is a quad 2-input NOR gate IC operating at 4.5–5.5 V supply, with 20 ns typical propagation delay at 5 V, ±4 mA output drive, and TTL-compatible input thresholds. It performs active-low logic summation in digital control signal conditioning circuits for industrial PLC I/O modules.

For engineers reviewing the 74HCT02PW/S400,118 datasheet, 74HCT02PW/S400,118 pinout, 74HCT02PW/S400,118 application, or 74HCT02PW/S400,118 equivalent, key selection criteria include propagation delay matching, fan-out capability in 5 V CMOS/TTL hybrid systems, and guaranteed high-level output voltage under load.

Technical Context

This device implements four independent NOR gates in a single monolithic CMOS structure using silicon-gate technology. Each gate features buffered outputs, Schmitt-trigger inputs are absent, and the logic function strictly follows Boolean expression Y = NOT(A OR B).

It operates within industrial temperature range (−40 °C to +125 °C), supports 5 V ±10% supply, and exhibits rail-to-rail output swing with defined VOH ≥ 4.4 V and VOL ≤ 0.4 V at IOH = −4 mA and IOL = 4 mA respectively.

Key Specifications

Pinout & Package

Supplied in TSSOP14 (4.4 mm × 5.0 mm) package with 0.65 mm lead pitch, JEDEC MO-153 compliant, and rated for reflow soldering per IPC/JEDEC J-STD-020.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NOR gate logic applications.

Compared with SN74HCT02DR and 74HCT02D,653, the 74HCT02PW/S400,118 offers superior board-area efficiency via TSSOP14 and eliminates pre-reflow baking requirements, making it optimal for automated SMT lines targeting compact industrial controllers.

Availability

74HCT02PW/S400,118 is available at Aetrix Electronics and suitable for industrial control logic, automotive body electronics, and legacy system interface designs requiring stable component supply and long-term manufacturability.

Supply support for 74HCT02PW/S400,118 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 focused on essential semiconductors, delivering high-performance, reliable components for automotive, industrial, and consumer markets.

This part belongs to the 74HCT logic family, engineered for seamless interoperability between TTL and CMOS systems while maintaining low static power and robust noise immunity in noisy 5 V environments.

FAQ

Is 74HCT02PW/S400,118 compatible with 3.3 V logic inputs?

No. Its input thresholds are fixed for 5 V TTL compatibility (V_IL ≤ 0.8 V, V_IH ≥ 2.0 V). Driving it from 3.3 V CMOS outputs risks marginal high-level recognition and is not guaranteed per datasheet. Use level-shifting or 74LVC-series devices for mixed-voltage interfacing.

What is the maximum capacitive load this device can drive reliably?

The datasheet specifies guaranteed timing up to 50 pF load capacitance. At 25 ns max tpd, driving >50 pF increases propagation delay nonlinearly and may cause setup/hold violations in synchronous systems. For >50 pF loads, add a buffer stage or reduce trace length.

Does this NOR gate have built-in hysteresis or Schmitt-trigger inputs?

No. The 74HCT02PW/S400,118 uses standard CMOS input structures without hysteresis. Input transition thresholds are symmetric and voltage-dependent. For noisy signal conditioning, external RC filtering or dedicated Schmitt-trigger gates (e.g., 74HCT14) must be used.

Can this device be used in open-drain configurations?

Not natively. Its outputs are push-pull, not open-drain. However, external pull-up resistors enable wired-OR functionality when multiple outputs share a common node - provided total sink current remains within 4 mA per output and voltage drop across the resistor stays within VOH spec.