Nexperia USA Inc. 74HCT4002DB,118

Overview

74HCT4002DB,118 from Nexperia is a dual 4-input NOR gate logic IC with TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 5.0 V), 14-pin SSOP package (SOT337-1), −40 °C to +125 °C operating range, and propagation delay of 13 ns (typ) at VCC = 4.5 V/CL = 50 pF. It enables compact, noise-immune combinational logic in industrial control sequencers and power management state machines.

For engineers reviewing the 74HCT4002DB,118 datasheet, 74HCT4002DB,118 pinout, 74HCT4002DB,118 application, or 74HCT4002DB,118 equivalent, key selection criteria include TTL-level input compatibility, SSOP14 thermal performance (5.5 mW/K derating above 60 °C), dual-gate functional density, and guaranteed operation up to +125 °C in automotive under-hood or industrial motor drive environments.

Technical Context

This device implements two independent 4-input NOR gates in a single monolithic CMOS structure with integrated input clamp diodes for overvoltage tolerance. Each gate accepts four logic inputs and produces one inverted OR output, supporting standard Boolean logic synthesis without external pull-ups or level shifters.

Its TTL-compatible input stage ensures direct interfacing with legacy 5 V microcontroller GPIOs and discrete transistor drivers, while its rail-to-rail output swing (VOH ≥ 3.84 V at IO = −4 mA, VOL ≤ 0.33 V at IO = 5.2 mA) maintains noise margins across temperature extremes.

Key Specifications

Pinout & Package

74HCT4002DB,118 uses the SOT337-1 plastic shrink small outline package (SSOP14): 14-lead, 5.3 mm body width, 0.65 mm lead pitch, and exposed pad not present. Designed for high-density PCB layouts with improved thermal resistance over SO14.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual 4-input NOR gate applications.

Compared with 74HCT4002D,653, the 74HCT4002DB,118 offers superior board-area efficiency and tighter thermal derating for compact, high-temperature designs; versus SN74HCT4002DR, it delivers faster switching and tighter parameter consistency across temperature for deterministic timing in industrial automation.

Availability

74HCT4002DB,118 is available at Aetrix Electronics and suitable for industrial motor control sequencers, automotive body controller logic, and legacy system glue logic requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HCT4002DB,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 manufacturability in high-volume applications.

The 74HCT series targets industrial and automotive systems needing TTL-compatible CMOS logic with extended temperature operation, low static power, and robust ESD tolerance - bridging legacy design requirements with modern process advantages.

FAQ

What is the maximum clock frequency supported by 74HCT4002DB,118?

The 74HCT4002DB,118 is a combinational logic device with no internal clock; its usable frequency depends on propagation delay and system-level timing constraints. With tpd = 13 ns (typ) at VCC = 4.5 V, it supports reliable operation in logic paths where total path delay remains below ~30 ns - effectively enabling synchronous designs up to approximately 30 MHz when combined with other fast logic stages.

Can 74HCT4002DB,118 interface directly with 3.3 V microcontrollers?

No - the 74HCT4002DB,118 requires VCC = 4.5–5.5 V and has TTL-level inputs (VIH ≥ 2.0 V), making it incompatible with direct 3.3 V logic driving. A level-shifter or resistor-based voltage divider is required to ensure VIH compliance when driven by 3.3 V outputs; alternatively, use the 74HC4002 variant with CMOS inputs if 3.3 V supply is mandatory.

Are Pins 6 and 8 internally connected or truly unused?

Pins 6 and 8 are confirmed no-connect (n.c.) terminals per Nexperia's official pin description table. They are not bonded internally and must remain unconnected - routing traces to them or applying solder paste violates the device specification and risks latent reliability issues due to parasitic coupling or mechanical stress.

Does 74HCT4002DB,118 support mixed-voltage operation (e.g., VCC = 5 V but inputs at 12 V)?

Yes - input clamp diodes allow safe interface to voltages exceeding VCC when used with appropriate current-limiting resistors. For 12 V inputs, a 10 kΩ series resistor limits IIK to <2 mA (well below ±20 mA absolute max), protecting the input stage while preserving logic thresholds - verified per Nexperia's recommended interface guidance in Section 1.