Texas Instruments CD4001BMT

Overview

CD4001BMT from Texas Instruments is a quad 2-input NOR gate CMOS logic IC operating across -55°C to +125°C, with supply voltage range 3 V to 18 V, propagation delay of 90 ns at 5 V, and static current consumption ≤ 1 µA. It serves as a fundamental building block in digital control circuits, power sequencers, and industrial safety interlocks requiring high noise immunity and wide temperature operation.

For engineers reviewing the CD4001BMT datasheet, CD4001BMT pinout, CD4001BMT application, or CD4001BMT equivalent, this page delivers verified package mapping (SOIC-14), confirmed electrical parameters (V_CC = 3–18 V, t_PLH/t_PHL = 90 ns @ 5 V), functional identity (quad 2-input NOR), and validated alternatives for legacy design continuity and obsolescence mitigation.

Technical Context

The CD4001BMT implements four independent 2-input NOR gates using standard CMOS silicon technology, with symmetrical input thresholds (V_IL = 1.5 V, V_IH = 3.5 V @ V_CC = 5 V) and rail-to-rail output swing. Its logic function follows Boolean expression Y = NOT(A OR B) per gate.

Designed for compatibility with CD4000-series logic families, it supports direct interfacing with TTL inputs at V_CC ≥ 10 V and exhibits low dynamic power dissipation (typ. 10 µW/gate @ 1 MHz, 5 V). Input protection diodes and latch-up immunity are inherent to its fabrication process.

Key Specifications

Pinout & Package

CD4001BMT is housed in a 14-pin SOIC (Small Outline Integrated Circuit) package per JEDEC MS-012 variation AB, with 1.27 mm pitch, 8.75 mm body width, and 1.75 mm max height. Pin 1 is located at the top-left corner adjacent to the index notch or dot marking.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad 2-input NOR gate applications.

Compared with CD4001BMT, CD4001BM offers guaranteed availability and updated manufacturing controls, while CD4001BNSR provides mechanical compatibility with legacy SOP tooling-both preserve identical logic behavior and interface timing, enabling seamless migration from the obsolete variant.

Availability

CD4001BMT is available at Aetrix Electronics and suitable for industrial control logic, safety interlock systems, and power sequencing applications requiring stable component supply despite its Obsolete status, with traceable legacy stock and cross-reference support.

Supply support for CD4001BMT 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

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic solutions, with over 50 years of CMOS logic innovation and aerospace-grade reliability validation.

The CD4001BMT belongs to the CD4000B series - a radiation-tolerant, wide-temperature CMOS logic family designed for mission-critical industrial, defense, and space applications where deterministic timing and supply flexibility are essential.

FAQ

What is the exact logic function implemented by the CD4001BMT?

The CD4001BMT contains four independent 2-input NOR gates, each implementing the Boolean function Y = NOT(A OR B). This is confirmed in the Harris Semiconductor SCHS015C datasheet and TI's official CD4000B family documentation. Each gate operates identically, with no shared internal resources between them.

Is CD4001BMT pin-compatible with other CD4000-series NOR gate variants like CD4001BE or CD4001BF3A?

Yes - CD4001BMT shares identical pinout (14-pin SOIC) and logic function with all CD4001B variants including CD4001BE (PDIP) and CD4001BF3A (CDIP). The pin assignments for inputs, outputs, V_CC, and GND are standardized across the family per JEDEC MS-012 and MIL-STD-1835 specifications.

What is the maximum operating frequency supported by CD4001BMT at 15 V supply?

At V_CC = 15 V, the CD4001BMT achieves a typical propagation delay of 30 ns per gate, supporting reliable operation up to approximately 10 MHz in toggle mode. This value is derived from TI's characterization data in the CD4000B datasheet and validated across temperature extremes.

Does CD4001BMT require external pull-up or pull-down resistors on unused inputs?

Yes - unused inputs on CD4001BMT must be tied to either V_CC or GND to prevent floating states that cause increased power consumption and potential oscillation. TI recommends connecting unused inputs directly to V_CC (for NOR logic) to ensure defined low output, as specified in Application Note SLVA614.

Can CD4001BMT directly drive an LED without a current-limiting resistor?

No - CD4001BMT cannot drive an LED without a series current-limiting resistor. Its output sink/source capability is ±4.2 mA at 15 V, insufficient to safely bias typical LEDs (which require 10–20 mA). A minimum 1 kΩ resistor is required at 5 V to limit current to ~3 mA, preserving output stage integrity and logic margins.