NXP Semiconductors HEF4011UBT,653

Overview

HEF4011UBT,653 from NXP Semiconductors (formerly Philips) is a quadruple 2-input unbuffered NAND gate IC in 14-lead SO plastic package (SOT108-1), operating from 3 V to 15 V supply, with propagation delays as low as 17 ns at 10 V and 50 pF load, used in digital logic control, oscillator circuits, and analog-compatible signal conditioning.

For engineers reviewing the HEF4011UBT,653 datasheet, HEF4011UBT,653 pinout, HEF4011UBT,653 application, or HEF4011UBT,653 equivalent, key selection considerations include unbuffered gate architecture, supply voltage range (3–15 V), input capacitance (10 pF), dynamic power dissipation formula, and compatibility with analog switching and relaxation oscillator topologies.

Technical Context

The HEF4011UBT,653 implements four independent 2-input NAND gates using unbuffered CMOS logic, where each gate's output impedance and transition time vary directly with input voltage slew rate and loading. Its transfer characteristics are defined across VDD = 5 V, 10 V, and 15 V, supporting both digital logic and quasi-analog functions like amplification and oscillation.

This device belongs to the LOCMOS HE4000B family and uses split n-transistor inputs for matched input behavior. It lacks internal buffering, enabling direct use in astable multivibrators (e.g., Fig.9) and crystal oscillators (e.g., Fig.10), with symmetrical inversion achievable by tying one input to VDD.

Key Specifications

Pinout & Package

HEF4011UBT,653 is housed in a 14-lead small outline (SO) plastic package per SOT108-1, with 1.27 mm lead pitch, gull-wing leads, and standard JEDEC MS-012 footprint.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NAND gate applications.

Compared with CD4011BE and 74HC00D, the HEF4011UBT,653 uniquely supports analog-mode operation across 3–15 V, making it irreplaceable in relaxation oscillators and voltage-controlled inverters where unbuffered gain and wide supply tolerance are essential.

Availability

HEF4011UBT,653 is available at Aetrix Electronics and suitable for industrial control panels, legacy automotive ECU refurbishment, and low-power sensor node timing circuits requiring stable component supply over extended product lifecycles.

Supply support for HEF4011UBT,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

NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications.

The HEF4011UBT,653 belongs to the legacy LOCMOS HE4000B logic family, designed specifically for robust, wide-voltage-range digital and mixed-signal applications where unbuffered gate behavior enables analog functionality beyond standard logic.

FAQ

What is the supply voltage range for the HEF4011UBT,653?

The HEF4011UBT,653 operates from 3 V to 15 V DC. This wide range allows direct use in both modern low-voltage systems (e.g., 3.3 V microcontrollers) and legacy industrial equipment (e.g., 12 V PLCs). The device's transfer characteristics, propagation delays, and power dissipation are all specified across this full range, as confirmed in Figures 4–6 and the AC Characteristics table of the January 1995 datasheet.

Can the HEF4011UBT,653 be used as an analog amplifier?

Yes - the HEF4011UBT,653 can operate as an analog inverter amplifier when one input is tied to VDD and the other serves as the signal input. Its unbuffered architecture provides controllable gain and threshold-dependent transfer curves, as shown in Figures 4–6 and Application Fig.16. This behavior is intrinsic to the HEF4011UBT,653 and is not shared by buffered logic families like 74HC.

What package type does the HEF4011UBT,653 use?

The HEF4011UBT,653 uses a 14-lead small outline (SO) plastic package conforming to SOT108-1, with 1.27 mm lead pitch and gull-wing terminations. This surface-mount package is distinct from the DIL (SOT27-1) and cerdip (SOT73) variants, and its footprint is documented in the "Package Outlines/Information" supplement referenced in the datasheet.

How does the HEF4011UBT,653 differ from the buffered 74HC00?

The HEF4011UBT,653 is unbuffered, enabling analog operation and wide-supply flexibility (3–15 V), whereas the 74HC00 is buffered, limited to 2–6 V, and optimized solely for fast digital switching. The HEF4011UBT,653's input capacitance (10 pF) and propagation delay dependency on load capacitance (e.g., tPLH = 9 ns + 0.23 ns/pF × CL) reflect its unbuffered nature - a key distinction confirmed in the Functional and Schematic Diagrams (Figs.1 & 3).

Is the HEF4011UBT,653 pin-compatible with other 4011 variants?

Yes - the HEF4011UBT,653 shares identical pinout with all HEF4011UB variants (e.g., HEF4011UBP, HEF4011UBD) and industry-standard 4011 devices like CD4011BE and MC14011B. All follow the standard 14-pin SO/DIP configuration: VDD (14), VSS (7), four NAND gates with inputs on pins 1–2, 5–6, 8–9, 12–13 and outputs on 3, 4, 10, 11 - verified in Fig.2 (Pinning diagram) of the datasheet.