NXP Semiconductors HEF4002BP,652

Overview

HEF4002BP,652 from NXP Semiconductors (formerly Philips) is a dual 4-input NOR gate IC in the HE4000B LOCMOS logic family, operating at supply voltages of 5 V, 10 V, or 15 V, with propagation delays as low as 12 ns at 15 V and CL = 50 pF, fully buffered outputs for high noise immunity, and designed for reliable combinatorial logic in industrial control and instrumentation systems.

For engineers reviewing the HEF4002BP,652 datasheet, HEF4002BP,652 pinout, HEF4002BP,652 application, or HEF4002BP,652 equivalent, key selection criteria include supply voltage range (5–15 V), dual-gate 4-input NOR topology, DIL-14 plastic package compatibility, AC timing behavior under defined load capacitance, and LOCMOS family-level DC/AC specifications per IC04 documentation.

Technical Context

The HEF4002BP,652 implements two independent 4-input NOR gates using LOCMOS (Low-power CMOS) technology, ensuring rail-to-rail output swing and high input impedance. Each gate's output is fully buffered to minimize pattern-dependent impedance variation and improve transient noise rejection across temperature and supply variations.

Timing performance is specified at three supply voltages (5 V, 10 V, 15 V) with load capacitance CL = 50 pF and input transition times ≤20 ns. Propagation delays scale linearly with CL via published formulas (e.g., tPLH = 12 ns + 0.16 ns/pF × CL at VDD = 15 V), enabling accurate delay prediction in loaded PCB traces and fan-out scenarios.

Key Specifications

Pinout & Package

HEF4002BP,652 is housed in a 14-lead dual in-line plastic package (SOT27-1, DIP-14), with 0.3-inch row spacing and through-hole mounting compatibility.

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 74HC4002N, the HEF4002BP,652 uniquely supports 5–15 V operation with LOCMOS noise immunity and predictable CL-scaled timing-making it irreplaceable in retrofitting 12 V industrial controls without board rework or voltage translation.

Availability

HEF4002BP,652 is available at Aetrix Electronics and suitable for industrial PLC input decoding, legacy test equipment logic sequencing, avionics panel interface logic, and medical device safety interlock monitoring requiring stable component supply across extended lifecycle programs.

Supply support for HEF4002BP,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

NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications, with roots in Philips' pioneering IC development.

The HE4000B LOCMOS logic family-including the HEF4002BP,652-was engineered for robustness in harsh industrial environments, emphasizing wide-supply operation, noise resilience, and long-term reliability over high-speed optimization.

FAQ

What logic family does the HEF4002BP,652 belong to, and how does it differ from standard 4000-series CMOS?

The HEF4002BP,652 belongs to the HE4000B LOCMOS (Low-power CMOS) family developed by Philips. Unlike standard 4000B CMOS, LOCMOS features fully buffered outputs, tighter AC parameter control across 5–15 V, and enhanced noise immunity-verified at 45 % VDD margin. The HEF4002BP,652 retains pin compatibility with CD4002 but delivers significantly faster and more predictable timing, especially above 5 V.

Is the HEF4002BP,652 pin-compatible with the CD4002BE, and can it be used as a direct replacement?

Yes, the HEF4002BP,652 shares identical DIP-14 pinout and logic function with the CD4002BE, including NC pins at 12 and 13. However, it is not a blind drop-in: HEF4002BP,652 operates reliably at 10 V and 15 V with sub-40 ns delays, whereas CD4002BE degrades above 5 V. Use HEF4002BP,652 in place of CD4002BE only when leveraging its wider voltage range or improved AC specs.

What is the maximum recommended load capacitance for stable operation of the HEF4002BP,652?

The HEF4002BP,652 is characterized up to CL = 50 pF in the official datasheet, with propagation and transition times extrapolated using published linear formulas (e.g., tPLH = 12 ns + 0.16 ns/pF × CL at 15 V). For stable operation beyond 50 pF, empirical validation is required-layout parasitics exceeding 50 pF may cause marginal timing or increased dynamic power in the HEF4002BP,652.

Does the HEF4002BP,652 require external pull-up or pull-down resistors on unused inputs?

No, the HEF4002BP,652 has CMOS inputs with negligible leakage (< 100 nA), so unused inputs must be tied HIGH or LOW-not left floating-to prevent oscillation and excess current. Pull-up/pull-down resistors (typically 10–100 kΩ) are acceptable, but direct connection to VDD or VSS is preferred for lowest power and noise immunity in the HEF4002BP,652.

Can the HEF4002BP,652 drive LSTTL loads directly, and how many?

Yes, the HEF4002BP,652 can directly drive up to 10 LSTTL unit loads per output, as confirmed by its buffered output stage and IOL/IOH specs in the HE4000B family documentation. At VDD = 10 V, it sources/sinks ≥4 mA, meeting LSTTL VIH/VIL thresholds with margin. This capability eliminates buffer stages in mixed-logic systems using the HEF4002BP,652.