SN74HC266DT Equivalent & Substitute Parts

Part Overview

The SN74HC266DT is a 4-channel XNOR (Exclusive NOR) logic gate IC manufactured by Texas Instruments in a 14-SOIC surface mount package. This component features open drain outputs and operates across a 2V to 6V supply voltage range, making it suitable for digital logic applications requiring XNOR gate functionality.

The SN74HC266DT is currently discontinued at DiGi Electronics. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for production and repair applications.

Substiute Parts

SN74HC266DT

Texas InstrumentsIn Stock: 1477SN74HC266DT Datasheet

Current PartRFQ

SN74HC266DR

Texas InstrumentsIn Stock: 2215SN74HC266DR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74HC266DT is determined by strict equivalence across the following critical parameters:

• Logic Type: XNOR (Exclusive NOR) gate function
• Circuit Configuration: 4 channels with 2 inputs per channel
• Output Architecture: Open drain configuration
• Supply Voltage Range: 2V ~ 6V
• Electrical Characteristics: Quiescent current, output current, input logic levels, and propagation delay
• Package Type: 14-SOIC surface mount package with identical physical dimensions
• Thermal Range: -40°C ~ 85°C operating temperature
• Compliance Standards: ROHS3 compliance and MSL rating

The SN74HC266DR qualifies as a parametric equivalent substitute based on identical electrical specifications and package configuration. The primary distinction is packaging format (Cut Tape & Digi-Reel versus Tape & Reel) and product status (Active versus Discontinued).

Parameter Comparison

Engineering Selection Recommendations

The SN74HC266DR is a direct parametric equivalent to the SN74HC266DT. Both parts are manufactured by Texas Instruments and share identical electrical specifications, operating characteristics, and package dimensions.

The SN74HC266DR is the preferred selection for new designs and component replacement due to its Active product status. The SN74HC266DT, being discontinued, should be replaced with the SN74HC266DR in production environments.

Both parts maintain ROHS3 compliance and MSL Level 1 rating, ensuring compatibility with standard manufacturing and storage protocols. The difference in packaging format (Cut Tape & Digi-Reel versus Tape & Reel) does not affect electrical performance or board-level functionality.

Frequently Asked Questions (FAQ)

Q: Can the SN74HC266DR be used as a direct replacement for the SN74HC266DT?

A: Yes. The SN74HC266DR is a parametric equivalent with identical electrical specifications, logic function, output characteristics, and package configuration. No circuit modifications are required.

Q: What is the difference between Tape & Reel (TR) and Cut Tape & Digi-Reel packaging?

A: Both packaging formats contain the same component in a 14-SOIC package. Tape & Reel is continuous reel packaging for automated assembly. Cut Tape & Digi-Reel provides individual tape segments and reel options for flexible ordering. The physical component and electrical performance are identical.

Q: Are there any compliance or certification differences between these parts?

A: No. Both the SN74HC266DT and SN74HC266DR maintain ROHS3 compliance, MSL Level 1 rating, and identical REACH and ECCN classifications.

Q: Why is the SN74HC266DT discontinued?

A: Product discontinuation is a manufacturer decision. The SN74HC266DR remains in active production and serves the same functional requirements.

Q: Can these parts be used interchangeably in existing designs?

A: Yes. The identical electrical specifications, operating temperature range, supply voltage requirements, and 14-SOIC package dimensions ensure direct interchangeability without design modifications.