CD74HC7266M Equivalent & Substitute Parts

Part Overview

The CD74HC7266M is a 4-channel XNOR (Exclusive NOR) logic IC manufactured by Texas Instruments in 14-SOIC surface mount packaging. This component performs exclusive NOR logic operations with dual inputs per channel, operating across a 2V to 6V supply voltage range. The part is discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing design requirements and production needs.

Substiute Parts

CD74HC7266M

Texas InstrumentsIn Stock: 1186CD74HC7266M Datasheet

Current PartRFQ

74HCT08D,653

Nexperia USA Inc.In Stock: 221574HCT08D,653 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The 74HCT08D,653 is listed as a manufacturer-recommended substitute. However, this substitution involves a functional logic type change from XNOR to AND gate operation. Substitution eligibility is determined by the following parameters:

• Logic function compatibility (XNOR vs. AND)
• Package type (14-SOIC form factor)
• Number of circuits (4 channels)
• Number of inputs per circuit (2 inputs)
• Supply voltage operating range
• Quiescent current specifications
• Output drive current capability
• Propagation delay performance
• Operating temperature range
• Surface mount compatibility

The 74HCT08D,653 maintains identical packaging, circuit count, and input configuration but operates within a narrower supply voltage range (4.5V ~ 5.5V) compared to the CD74HC7266M (2V ~ 6V).

Parameter Comparison

Engineering Selection Recommendations

The 74HCT08D,653 is listed as a manufacturer-recommended substitute and maintains active product status with current inventory availability. Both components are ROHS3 compliant and REACH unaffected, meeting regulatory requirements for industrial and commercial applications.

Selection between these parts requires evaluation of circuit-level logic requirements. The CD74HC7266M provides XNOR logic function with extended supply voltage range (2V ~ 6V), while the 74HCT08D,653 provides AND logic function with standard TTL-compatible supply range (4.5V ~ 5.5V). The 74HCT08D,653 offers faster propagation delay (24ns vs. 30ns) and lower output drive current (4mA vs. 5.2mA).

Substitution is appropriate only when AND gate logic satisfies the original XNOR logic requirements, or when circuit redesign accommodates the functional change. Supply voltage compatibility must be confirmed for the target application.

Frequently Asked Questions (FAQ)

Q: Can the 74HCT08D,653 directly replace the CD74HC7266M without circuit modification?

A: Direct pin-for-pin replacement is possible due to identical 14-SOIC packaging and circuit count. However, functional replacement requires that AND gate logic satisfies the original XNOR logic requirements. Circuit redesign may be necessary if XNOR functionality is critical to system operation.

Q: What is the primary difference between these two parts?

A: The CD74HC7266M performs XNOR (Exclusive NOR) logic operations, while the 74HCT08D,653 performs AND gate logic operations. Both maintain 4 channels with 2 inputs per channel in identical 14-SOIC packaging.

Q: Are there supply voltage compatibility concerns?

A: The CD74HC7266M operates from 2V to 6V, while the 74HCT08D,653 operates from 4.5V to 5.5V. Applications requiring operation below 4.5V or above 5.5V cannot use the 74HCT08D,653 as a substitute.

Q: How do propagation delays compare?

A: The 74HCT08D,653 provides faster propagation delay (24ns @ 4.5V) compared to the CD74HC7266M (30ns @ 6V), both measured at 50pF load capacitance.

Q: Are both parts RoHS compliant?

A: Yes, both the CD74HC7266M and 74HCT08D,653 are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.