NXP Semiconductors 74HCT02PW,112

Overview

74HCT02PW,112 from Nexperia is a quad 2-input NOR gate logic IC with TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 5 V), 4.5–5.5 V supply range, −40 °C to +125 °C operation, and TSSOP14 (SOT402-1) package. It delivers 11 ns typical propagation delay at 5 V/50 pF and supports rail-to-rail CMOS output swing. Used in digital control signal conditioning, reset logic consolidation, and bus arbitration circuits.

For engineers reviewing the 74HCT02PW,112 datasheet, 74HCT02PW,112 pinout, 74HCT02PW,112 application, or 74HCT02PW,112 equivalent, key selection criteria include TTL-level input compatibility, guaranteed operation up to +125 °C, TSSOP14 thermal performance (7.3 mW/K derating above 81 °C), and compliance with JEDEC JESD7A and JESD8C standards.

Technical Context

This device implements four independent 2-input NOR gates in a single monolithic CMOS structure with input clamp diodes enabling safe interfacing to voltages exceeding VCC. Its TTL-compatible inputs accept standard 5 V logic levels while driving CMOS loads with VOH ≥ 3.98 V and VOL ≤ 0.26 V at IO = ±4 mA.

The logic function follows strict Boolean NOR behavior: output is HIGH only when both inputs are LOW; all other combinations yield LOW. Propagation delays are characterized across temperature and voltage (tpd = 11–29 ns), with transition times (tt = 7–22 ns) specified under defined load and measurement conditions per IEC 60134.

Key Specifications

Pinout & Package

TSSOP14 package (SOT402-1): plastic thin shrink small outline, 14 leads, 4.4 mm body width, 0.65 mm lead pitch, 1.2 mm max height. Pin 1 index located at top-left corner with notch marking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HCT02PW,112, the SO14 variant offers superior mechanical robustness and thermal dissipation at the cost of PCB area, while the TI SN74HCT02DR sacrifices extended temperature capability for brand alignment-neither provides the combined TSSOP miniaturization and full −40 °C to +125 °C qualification of the Nexperia part.

Availability

74HCT02PW,112 is available at Aetrix Electronics and suitable for industrial control logic, automotive body electronics, and power sequencing monitor applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HCT02PW,112 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 manufacturability in high-volume applications.

The 74HCT series targets mixed-signal systems requiring TTL-compatible logic interfacing with CMOS power efficiency-designed specifically for industrial automation, automotive subsystems, and consumer electronics where robustness and interoperability are critical.

FAQ

Can 74HCT02PW,112 operate reliably at 3.3 V supply?

No. The 74HCT02PW,112 is specified only for 4.5 V to 5.5 V operation per its Recommended Operating Conditions table. At 3.3 V, input thresholds (VIH/VIL) and output drive (VOH/VOL) fall outside guaranteed limits, risking logic misinterpretation and insufficient fan-out. Use 74HC02 variants for 2.0–6.0 V operation including 3.3 V.

What is the maximum capacitive load this device can drive without timing degradation?

The datasheet characterizes dynamic performance at CL = 15 pF and CL = 50 pF. Propagation delay increases linearly with load capacitance; at 5 V and 50 pF, tpd = 11–29 ns depending on temperature. For stable timing, keep total load (including trace and input capacitance) ≤ 50 pF. Exceeding this requires buffer insertion or layout optimization.

Does this part support hot-swap or live-insertion?

No. The 74HCT02PW,112 lacks powered-off protection circuitry. Applying input signals while VCC is absent or ramping violates Absolute Maximum Ratings (e.g., VI < −0.5 V or > VCC + 0.5 V), risking latch-up or permanent damage. Always ensure VCC is stable before asserting inputs.

How does the input clamp diode affect external resistor selection for overvoltage protection?

The integrated clamp diodes allow safe interface to voltages up to VCC + 0.5 V. To limit clamp current to ≤ ±20 mA (Absolute Maximum Rating), select a series resistor R ≥ |V_IN − VCC| / 20 mA. For example, with VCC = 5 V and VIN = 12 V, R ≥ 350 Ω. Lower values risk exceeding IIK rating and damaging the input stage.