Nexperia USA Inc. 74HC02DB,112

Overview

74HC02DB,112 from Nexperia is a quad 2-input NOR gate logic IC operating across 2.0 V to 6.0 V supply, delivering CMOS-level input compatibility, propagation delay as low as 7 ns at VCC = 6.0 V (CL = 50 pF), and guaranteed operation from –40 °C to +125 °C in SO14 package. It serves as a fundamental combinational logic element in digital control subsystems, bus arbitration circuits, and reset signal conditioning.

For engineers reviewing the 74HC02DB,112 datasheet, 74HC02DB,112 pinout, 74HC02DB,112 application, or 74HC02DB,112 equivalent, key selection considerations include input voltage threshold compatibility (CMOS-level VIH/VIL), output drive strength (±4.0 mA at VCC = 4.5 V), thermal performance in SO14 (Ptot = 500 mW), and functional equivalence with 74HCT02 variants under TTL-level interface conditions.

Technical Context

This device implements four independent 2-input NOR gates in a single monolithic CMOS structure, each with symmetrical input clamping diodes enabling safe interfacing to voltages exceeding VCC when used with current-limiting resistors. The logic function strictly follows Boolean expression Y = NOT(A OR B) per gate.

All inputs are fully buffered and electrically identical; outputs exhibit rail-to-rail swing with defined VOH ≥ 3.98 V and VOL ≤ 0.26 V at IO = ±4.0 mA and VCC = 4.5 V. Propagation delays are characterized across temperature and supply voltage, with worst-case tpd = 27 ns at –40 °C to +85 °C and VCC = 4.5 V.

Key Specifications

Pinout & Package

74HC02DB,112 is supplied in SO14 (SOT108-1) plastic small outline package: 14-lead, 3.9 mm body width, 1.27 mm lead pitch, gull-wing leads, JEDEC MS-012 compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HC02DB,112, the 74HCT02DB,112 offers superior interoperability with legacy 5 V TTL but sacrifices noise immunity in mixed-voltage domains, while SN74HC02DR provides identical functionality with minor thermal derating - making the Nexperia part optimal for new industrial designs prioritizing noise margin and thermal headroom.

Availability

74HC02DB,112 is available at Aetrix Electronics and suitable for industrial PLC I/O conditioning, microcontroller reset logic, legacy bus arbitration, and digital power sequencing requiring stable component supply across extended temperature ranges.

Supply support for 74HC02DB,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 leading semiconductor manufacturer specializing in high-performance logic, analog, and discrete components, with global R&D and manufacturing infrastructure focused on automotive and industrial reliability standards.

The 74HC02 belongs to Nexperia's HC logic family, designed for low-power, high-noise-immunity digital control in industrial automation, building management, and embedded instrumentation where long-term stability and wide supply flexibility are critical.

FAQ

Can 74HC02DB,112 operate reliably at 2.0 V supply?

Yes. The device is fully specified from 2.0 V to 6.0 V, with VIH ≥ 1.5 V and VOL ≤ 0.5 V at VCC = 2.0 V and IO = ±20 μA. Propagation delay increases to 90 ns typical at this voltage, but logic functionality remains guaranteed across the full –40 °C to +125 °C range.

What is the maximum capacitive load the outputs can drive?

The outputs are characterized up to 50 pF load capacitance in dynamic testing, with tpd and tt values published for CL = 50 pF. Driving loads beyond 50 pF is possible but will increase propagation delay linearly - for example, 100 pF adds ~15 ns to tpd at VCC = 4.5 V based on CPD = 22 pF and dynamic power model.

Does 74HC02DB,112 require external pull-up or pull-down resistors on unused inputs?

No. Unused inputs must be tied to VCC or GND to prevent floating states and increased ICC. The datasheet explicitly prohibits leaving inputs unconnected due to CMOS input structure susceptibility to noise-induced shoot-through current and potential oscillation.

Is the SO14 package RoHS-compliant and halogen-free?

Yes. Nexperia confirms SOT108-1 packaging for 74HC02DB,112 meets RoHS Directive 2011/65/EU and is halogen-free per IEC 61249-2-21, with lead finish composition SnAgCu (SAC305) and compliant moisture sensitivity level (MSL3).