NXP Semiconductors 74HCT02D,652

Overview

74HCT02D,652 from Nexperia is a quad 2-input NOR gate logic IC operating at 4.5 V to 5.5 V supply, delivering TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max), propagation delay of 11–29 ns (VCC = 4.5 V, CL = 50 pF), and rated for -40 °C to +125 °C industrial temperature range. It serves as a fundamental combinational logic building block in digital control subsystems, power sequencing circuits, and bus arbitration logic.

For engineers reviewing the 74HCT02D,652 datasheet, 74HCT02D,652 pinout, 74HCT02D,652 application, or 74HCT02D,652 equivalent, key selection criteria include TTL-level input compatibility, SO14 package thermal performance (Ptot = 500 mW), guaranteed operation across extended temperature, and precise propagation timing under 50 pF load.

Technical Context

The 74HCT02D,652 implements four independent CMOS-based NOR gates with integrated input clamp diodes enabling safe interfacing to voltages exceeding VCC when used with current-limiting resistors. Its TTL-compatible input stage ensures direct compatibility with legacy 5 V logic families without level shifting.

Each gate exhibits symmetrical HIGH/LOW output drive (IO = ±4.0 mA at VCC = 4.5 V), low static ICC (≤2.0 μA typical), and defined transition thresholds (VM = 1.3 V for tPHL/tPLH measurement). The device complies with JEDEC JESD8C (2.7–3.6 V) and JESD7A (2.0–6.0 V) standards and supports robust ESD immunity (HBM >2000 V, CDM >1000 V).

Key Specifications

Pinout & Package

74HCT02D,652 uses the SO14 (SOT108-1) plastic small outline package: 14-pin, 3.9 mm body width, 1.27 mm lead pitch, 1.75 mm max height. Pin 1 is index-marked; pin 7 = GND, pin 14 = VCC.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74HCT02DR and MC74HCT02ADR2G, the 74HCT02D,652 offers identical core logic functionality and timing but distinguishes itself through Nexperia's optimized SO14 thermal derating profile (10.1 mW/K above 100 °C) and industry-leading CDM ESD rating (>1000 V), making it especially suitable for compact, thermally constrained industrial modules.

Availability

74HCT02D,652 is available at Aetrix Electronics and suitable for industrial control systems, automotive body electronics, power supply sequencing, and embedded instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HCT02D,652 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 efficiency technologies, delivering high-performance logic, analog, and MOSFET solutions with emphasis on reliability and manufacturability.

The 74HCT02D,652 belongs to Nexperia's 74HCT logic family, engineered specifically for seamless integration with legacy TTL systems while leveraging CMOS power efficiency and noise immunity in industrial and automotive-adjacent applications.

FAQ

What is the maximum clock frequency supported by the 74HCT02D,652?

The 74HCT02D,652 is a combinational logic device-not a clocked element-so it has no inherent clock frequency limit. Its usable toggle rate depends on propagation delay and load capacitance: with CL = 50 pF and VCC = 4.5 V, maximum reliable switching frequency is approximately 17 MHz (1 / (2 × 29 ns)). System-level timing must account for worst-case tpd plus board trace delays.

Can the 74HCT02D,652 operate at 3.3 V supply?

No. The 74HCT02D,652 is specified only for 4.5 V to 5.5 V operation. At 3.3 V, input thresholds (VIH = 2.0 V min) become marginal, and output drive (VOH ≥ 3.98 V) cannot be guaranteed. For 3.3 V systems, use the 74HC02 variant (CMOS input) or 74LVC02 (dual-supply tolerant) instead.

Does the 74HCT02D,652 support mixed-voltage interfacing?

It supports limited mixed-voltage operation via its input clamp diodes: inputs may be driven by signals up to VCC + 0.5 V when series current-limiting resistors are used. However, outputs swing rail-to-rail (0 V to VCC), so driving lower-voltage logic requires external level-shifting or resistor-divider networks to avoid overvoltage damage.

Is the SO14 package of the 74HCT02D,652 RoHS and REACH compliant?

Yes. The 74HCT02D,652 in SOT108-1 (SO14) package meets RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006, including SVHC screening. Lead content is <1000 ppm, and all restricted substances are below threshold limits. Full compliance documentation is available from Nexperia upon request.