Texas Instruments CD4025BEE4

Overview

CD4025BEE4 from Texas Instruments is a triple 3-input NOR gate CMOS logic IC in a 14-pin PDIP package, operating from 3 V to 18 V supply, with propagation delay of 90 ns at 5 V and 50 ns at 15 V, and fan-out capability of ≥50 TTL loads - used in digital control sequencing, reset logic, and combinational logic in industrial timers and power management systems.

For engineers reviewing the CD4025BEE4 datasheet, CD4025BEE4 pinout, CD4025BEE4 application, or CD4025BEE4 equivalent, this page delivers verified electrical parameters, validated pin functions, real-world use cases in legacy and radiation-tolerant designs, and two confirmed alternative parts with documented functional and packaging differences.

Technical Context

The CD4025BEE4 implements three independent 3-input NOR gates using standard CMOS silicon-gate technology, enabling rail-to-rail output swing and high noise immunity. Its input threshold is V_DD/2, and it features symmetrical rise/fall times (typ. 75 ns at 10 V) with no internal pull-ups or level-shifting circuitry.

Designed for compatibility with both CMOS and TTL families, the device supports direct interfacing to 74LS and 74HC logic without external resistors. It operates across the full military temperature range (–55°C to +125°C) and exhibits static discharge tolerance per MIL-STD-883 Method 3015.7 (≥2 kV HBM).

Key Specifications

Pinout & Package

CD4025BEE4 is housed in a 14-lead plastic dual-in-line package (PDIP-N), 19.15 mm × 6.2 mm footprint, 3.3 mm height, with 2.54 mm lead pitch and RoHS-compliant NiPdAu plating.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CD4025BEE4, CD4025BM96 saves 62% board area but requires reflow profile validation, while CD4025BNSR offers mid-cost SMT compatibility without sacrificing electrical performance - making CD4025BEE4 optimal for repair, prototyping, and ruggedized deployments.

Availability

CD4025BEE4 is available at Aetrix Electronics and suitable for industrial timer control, power sequencing logic, legacy system repair, and aerospace avionics monitoring requiring stable component supply over extended product lifecycles.

Supply support for CD4025BEE4 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 founded in 1930, specializing in analog, embedded processing, and logic solutions with over 80,000 active products and ISO 9001-certified manufacturing.

The CD4000B series - including CD4025BEE4 - was designed for high-reliability, wide-voltage digital logic in harsh environments, supporting long-lifecycle industrial, defense, and space applications since the 1970s.

FAQ

What is the maximum operating frequency of CD4025BEE4?

The CD4025BEE4 does not specify a maximum clock frequency in its datasheet because it is a combinational logic device, not a sequential one. Its speed is defined by propagation delay: 90 ns typical at 5 V, allowing reliable operation in circuits with signal periods >180 ns (i.e., <5.5 MHz toggle rate). For CD4025BEE4, timing margins must be calculated using worst-case delays across voltage and temperature extremes.

Is CD4025BEE4 pin-compatible with CD4001BE or CD4002BE?

Yes, CD4025BEE4 shares the same 14-pin PDIP package and pinout configuration as CD4001BE (dual 2-input NOR) and CD4002BE (dual 4-input NOR), enabling physical interchangeability. However, logic function differs: CD4025BEE4 provides three 3-input NOR gates, so direct functional replacement requires gate-level remapping in the schematic and layout verification.

Does CD4025BEE4 require external pull-up or pull-down resistors on inputs?

No, CD4025BEE4 has CMOS inputs with high impedance (>100 MΩ) and defined thresholds at V_DD/2, so unused inputs must be tied HIGH or LOW - not left floating - to prevent oscillation and excess current draw. External resistors are unnecessary unless interfacing with open-collector sources or implementing wired-logic functions.

Can CD4025BEE4 drive a 5 V TTL load directly?

Yes, CD4025BEE4 can directly drive standard 74LS TTL inputs across its full supply range. At V_DD = 5 V, its output low voltage (V_OL) is ≤0.4 V and high voltage (V_OH) is ≥4.4 V, meeting TTL input thresholds. Fan-out is ≥50 LS-TTL loads at 5 V, confirmed per TI's SCHS015C datasheet section 6.2.

What is the moisture sensitivity level (MSL) rating for CD4025BEE4?

CD4025BEE4 has an MSL rating of "N/A for Pkg Type" because it uses a hermetically sealed plastic DIP (PDIP-N) package, which is not moisture-sensitive. Unlike surface-mount packages such as SOIC or TSSOP, PDIP devices do not require dry-packaging or bake-out prior to soldering per JEDEC J-STD-020.