onsemi CD4001BCMX

Overview

CD4001BCMX from Fairchild Semiconductor is a quad 2-input NOR gate IC in the CMOS B-series logic family, featuring buffered outputs, symmetrical source/sink drive capability, and operation across 3–15 V supply. It delivers 0.64 mA low-level output current at 5 V, supports −55°C to +125°C industrial temperature range, and is used in digital control logic, power-on reset circuits, and discrete combinational logic blocks.

For engineers reviewing the CD4001BCMX datasheet, pinout, applications, or equivalent options, key selection criteria include its 5–15 V parametric rating, 1 µA max input leakage at 15 V, 120 ns typical propagation delay (VDD = 5 V), and compatibility with legacy 74L/74LS TTL fan-out requirements.

Technical Context

The CD4001BCMX implements four independent 2-input NOR gates using monolithic CMOS technology with matched N- and P-channel enhancement-mode transistors. Each gate features fully buffered output stages that provide high-voltage gain and improved noise margin over unbuffered variants.

It operates across a wide VDD range (3–15 V DC) with symmetrical VOH/VOL performance: at 5 V, VOH ≥ 4.95 V and VOL ≤ 0.05 V under load; input thresholds scale linearly with supply voltage (VIH ≈ 0.7×VDD, VIL ≈ 0.3×VDD), enabling robust interfacing across mixed-voltage systems.

Key Specifications

Pinout & Package

CD4001BCMX is supplied in a 14-lead Small Outline Integrated Circuit (SOIC) package per JEDEC MS-012, 0.150" narrow body, with standard DIP-compatible pin spacing and gull-wing leads for surface-mount assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CD4001BCMX, CD4001BEE4 offers identical functionality in through-hole form but lacks tape-and-reel support, while MC14001BDG provides second-source availability at the cost of reduced input leakage performance-critical in high-impedance timing circuits.

Availability

CD4001BCMX is available at Aetrix Electronics and suitable for industrial control logic, power-on reset generation, and legacy system repair requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for CD4001BCMX 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

Fairchild Semiconductor was a U.S.-based analog and power IC manufacturer acquired by ON Semiconductor in 2016; known for high-reliability logic, MOSFETs, and power management solutions.

The CD4001BCMX belongs to Fairchild's B-series CMOS logic product line, designed for robust, wide-supply-voltage digital interfacing in harsh environments including automotive, industrial, and aerospace applications.

FAQ

What logic function does the CD4001BCMX implement?

The CD4001BCMX implements four independent 2-input NOR gates. Each gate outputs HIGH only when both inputs are LOW; otherwise, the output is LOW. This function is defined by the Boolean expression Y = NOT(A OR B). The CD4001BCMX uses buffered CMOS outputs to improve noise immunity and switching characteristics compared to unbuffered variants like CD4001BE.

Is CD4001BCMX compatible with 3.3 V logic systems?

Yes, CD4001BCMX operates down to 3 V VDD, making it compatible with 3.3 V logic systems. At 3.3 V, VIH is approximately 2.3 V and VIL is ~1.0 V, providing adequate noise margin. However, output drive strength decreases proportionally-verify sink/source capability against the load (e.g., 74LVC inputs) and consider adding series termination if driving long traces.

What is the maximum operating temperature for CD4001BCMX?

The CD4001BCMX is rated for operation from −55°C to +125°C. This full military-grade temperature range is confirmed in the Absolute Maximum Ratings and DC Electrical Characteristics tables of the official Fairchild datasheet DS005939. It supports deployment in engine control units, industrial motor drives, and outdoor telecom infrastructure without derating.

Does CD4001BCMX require external pull-up or pull-down resistors on unused inputs?

Yes, all unused inputs on CD4001BCMX must be terminated-either tied to VDD or VSS-to prevent floating nodes that cause increased supply current, erratic switching, or localized heating. CMOS inputs have high impedance; leaving them open risks noise-induced oscillation and violates the "all inputs protected" design assumption stated in the datasheet schematic notes.

What package type is used for CD4001BCMX?

CD4001BCMX uses a 14-lead Small Outline Integrated Circuit (SOIC) package per JEDEC MS-012, designated as package number M14A. It has a 0.150" body width, gull-wing leads, and 1.27 mm lead pitch-identical to industry-standard SOIC-14 footprints used for 74-series logic and microcontrollers.