Nexperia USA Inc. HEF4002BT,653

Overview

HEF4002BT,653 from Nexperia is a dual 4-input NOR gate logic IC in SO14 package, operating from 3 V to 15 V supply, delivering symmetrical buffered outputs with ±10 mA drive capability and guaranteed operation from −40 °C to +85 °C. It implements two independent NOR functions (1Y = NOT(1A+1B+1C+1D), 2Y = NOT(2A+2B+2C+2D)) for combinational logic synthesis in industrial control and instrumentation systems.

For engineers reviewing the HEF4002BT,653 datasheet, HEF4002BT,653 pinout, HEF4002BT,653 application, or HEF4002BT,653 equivalent, this page provides verified functional behavior, validated pin assignments, confirmed static/dynamic timing across voltage grades (5 V/10 V/15 V), JEDEC JESD13-B compliance, and real-world use cases in noise-immune digital interfacing.

Technical Context

The HEF4002BT,653 uses CMOS technology with fully static operation and electrostatic-protected inputs/outputs. Its dual-gate architecture supports independent 4-input NOR evaluation without internal coupling, and output buffering ensures consistent rise/fall times and high noise immunity across load variations.

Propagation delay scales predictably with supply voltage and capacitive load: 60 ns typical at 5 V/50 pF, 25 ns at 10 V/50 pF, and 20 ns at 15 V/50 pF. Input transition rate limits (3.75 µs/V at 5 V) and clamping current protection (±10 mA) define safe switching boundaries under transient conditions.

Key Specifications

Pinout & Package

HEF4002BT,653 is housed in a plastic small outline package (SO14, SOT108-1) with 14 leads and 3.9 mm body width, optimized for surface-mount assembly and thermal dissipation up to 500 mW total power.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CD4002BE and 74HC4002PW, the HEF4002BT,653 uniquely balances wide supply range (3–15 V), industrial temperature grade, and SO14 SMT compatibility-making it the sole option for upgrading legacy 4000-series logic in mixed-voltage industrial control hardware.

Availability

HEF4002BT,653 is available at Aetrix Electronics and suitable for industrial PLC input conditioning, power sequencing control, and legacy system logic interface requiring stable component supply across extended temperature and voltage ranges.

Supply support for HEF4002BT,653 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 high-volume, high-reliability logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.

The HEF4002BT,653 belongs to Nexperia's legacy-compatible 4000B series, engineered specifically for drop-in replacement of aging CMOS logic in industrial control and instrumentation where wide supply range and temperature resilience are critical.

FAQ

What is the maximum allowable input voltage for HEF4002BT,653?

The absolute maximum input voltage is VSS − 0.5 V to VDD + 0.5 V per JEDEC JESD78. Exceeding this range risks permanent damage due to internal clamping diode conduction beyond ±10 mA. For reliable operation, inputs must stay within 0 V to VDD under normal conditions, with VIH ≥ 11.0 V and VIL ≤ 4.0 V at VDD = 15 V.

Can unused inputs be left floating?

No. Unused inputs must be tied to VDD, VSS, or another driven input. Floating inputs cause increased supply current, unpredictable logic states, and potential oscillation due to CMOS input stage sensitivity. The datasheet explicitly prohibits open-circuit inputs to ensure static operation and noise immunity.

Does HEF4002BT,653 support mixed-voltage operation between its two gates?

No. Both gates share a common VDD and VSS, so they operate at the same supply voltage. The device does not support independent voltage domains per gate. All inputs and outputs referenced to the same VDD/VSS pair ensures consistent logic thresholds and output swing, but precludes split-rail or dual-supply configurations.

How does propagation delay vary with load capacitance?

Propagation delay follows published extrapolation formulas: tpd = 12 + 0.16 × CL ns at VDD = 15 V, 14 + 0.23 × CL ns at VDD = 10 V, and 33 + 0.55 × CL ns at VDD = 5 V (CL in pF). Measured at CL = 50 pF, delays range from 20 ns (15 V) to 60 ns (5 V), confirming predictable scaling for timing budgeting.