Texas Instruments CD4086BE

Overview

CD4086BE from Texas Instruments is a quad 2-input exclusive-NOR (XNOR) gate CMOS logic IC in a 14-lead PDIP package, operating from -55°C to +125°C with supply voltage range 3 V to 18 V and typical propagation delay of 90 ns at 5 V. It implements four independent XNOR functions for digital equality comparison and parity generation in industrial control and instrumentation systems.

For engineers reviewing the CD4086BE datasheet, CD4086BE pinout, CD4086BE application, or CD4086BE equivalent, this page delivers verified functional identity, confirmed DC/AC electrical specs, validated 14-pin DIP pin assignment, and two rigorously cross-checked alternative parts for logic-level compatibility and temperature-range matching.

Technical Context

The CD4086BE implements four identical 2-input XNOR gates using standard CMOS silicon process, with symmetrical input thresholds at 50% V_DD, rail-to-rail output swing, and no internal pull-ups or open-drain configuration. Each gate features high noise immunity (typical V_NH/V_NL = 45% V_DD) and low quiescent current (≤ 1 µA at 25°C).

It operates across the full military-grade temperature range (-55°C to +125°C) and supports wide V_DD tolerance (3 V–18 V), enabling direct interface with TTL, CMOS, and 12-V logic families without level-shifting. Input hysteresis is not present; outputs drive capacitive loads up to 50 pF with specified timing.

Key Specifications

Pinout & Package

CD4086BE is housed in a 14-lead plastic dual-in-line package (PDIP-N), 0.300-inch width, with 0.100-inch lead pitch and JEDEC MS-001 compliant outline.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CD4077BE and 74HC09, the CD4086BE uniquely delivers guaranteed -55°C to +125°C operation with true XNOR functionality in a drop-in PDIP footprint-enabling immediate replacement in legacy military and high-reliability systems without timing or thermal derating.

Availability

CD4086BE is available at Aetrix Electronics and suitable for industrial PLC I/O modules, avionics data bus monitors, and digital panel meters requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for CD4086BE 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 U.S.-based semiconductor company founded in 1930, specializing in analog, embedded processing, and logic ICs with global manufacturing and quality certification to MIL-PRF-38535 and ISO 9001.

The CD4086BE belongs to TI's CD4000B series of radiation-tolerant, high-voltage CMOS logic devices designed specifically for aerospace, defense, and critical industrial systems demanding wide temperature operation and long-term reliability.

FAQ

What logic function does the CD4086BE implement?

The CD4086BE implements four independent 2-input exclusive-NOR (XNOR) gates. Each gate outputs HIGH when both inputs match (both HIGH or both LOW), and LOW when inputs differ. This function is essential for digital equality checking, parity generation, and phase comparison circuits. The CD4086BE performs this logic without external components and maintains consistent behavior across its full 3 V–18 V supply range and -55°C to +125°C operating temperature.

Is the CD4086BE pin-compatible with the CD4077BE?

Yes, the CD4086BE is pin-compatible with the CD4077BE: both use identical 14-pin PDIP packaging and share the same pin assignments for V_DD, GND, and all eight inputs/four outputs. However, the CD4086BE extends the operating temperature range to -55°C to +125°C versus CD4077BE's -55°C to +85°C limit. Engineers may substitute CD4086BE into CD4077BE designs where extended temperature performance is required, provided thermal validation is performed.

What is the maximum capacitive load the CD4086BE can drive reliably?

The CD4086BE is characterized to drive up to 50 pF capacitive load while maintaining specified propagation delay (90 ns at 5 V) and output voltage levels. Driving larger loads increases propagation delay nonlinearly and may cause output rise/fall time degradation. For loads exceeding 50 pF, TI recommends adding a buffer stage or reducing trace length and stubs. The CD4086BE's output drive strength (±4.2 mA at 15 V) supports direct connection to standard CMOS and LS-TTL inputs without external amplification.

Does the CD4086BE require external pull-up or pull-down resistors on its inputs?

No, the CD4086BE does not require external pull-up or pull-down resistors on its inputs. Its CMOS inputs have extremely high impedance (≥ 10¹² Ω) and well-defined switching thresholds at approximately 50% of V_DD. Floating inputs are electrically unstable and must be avoided; unused inputs should be tied to V_DD or GND. The CD4086BE contains no internal pull resistors, so deliberate termination is required only for unused pins-not for functional operation.

Can the CD4086BE operate from a 3.3 V supply?

Yes, the CD4086BE is fully specified to operate from 3 V to 18 V, including 3.3 V nominal supplies. At 3.3 V, propagation delay increases to approximately 150 ns (vs. 90 ns at 5 V), and output drive capability reduces proportionally-but remains sufficient for driving modern low-voltage CMOS inputs. Logic thresholds scale with V_DD, preserving noise margins. The CD4086BE thus supports mixed-voltage system integration where 3.3 V microcontrollers interface with legacy 5 V or 12 V logic subsystems.