CD74HC27MT NOR Gate IC Equivalent & Substitute Parts

Part Overview

The CD74HC27MT is a 3-channel NOR gate logic IC manufactured by Texas Instruments in a 14-SOIC surface mount package. This component implements three independent 3-input NOR gates on a single die, operating across a 2V to 6V supply voltage range. The CD74HC27MT is currently discontinued at DiGi Electronics, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity. Substitute parts must maintain identical logic functionality, electrical performance, and mechanical compatibility to ensure direct replacement capability.

Substiute Parts

CD74HC27MT

Texas InstrumentsIn Stock: 1250CD74HC27MT Datasheet

Current PartRFQ

CD74HC27M96

Texas InstrumentsIn Stock: 2233CD74HC27M96 Datasheet

Parametric EquivalentRFQ

74HC27D,653

Nexperia USA Inc.In Stock: 1450174HC27D,653 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CD74HC27MT are qualified based on the following criteria:

Functional Equivalence: All substitutes must implement 3-channel, 3-input NOR gate logic with identical truth table behavior.

Electrical Parameters: Supply voltage range (2V ~ 6V), quiescent current (2 µA max), output current capability (5.2mA), input logic thresholds, and propagation delay must remain within specified tolerances.

Mechanical Compatibility: Package type must be 14-SOIC surface mount with identical pin configuration and footprint dimensions (0.154", 3.90mm width).

Compliance & Certification: RoHS3 compliance and MSL rating of 1 are required for production environments.

Series Compatibility: All substitutes belong to the 74HC logic family, ensuring consistent performance characteristics across the product line.

Parameter Comparison

Engineering Selection Recommendations

CD74HC27M96 (Parametric Equivalent): This Texas Instruments part maintains identical electrical specifications and operating temperature range (-55°C ~ 125°C) to the CD74HC27MT. The part is currently in active production status with higher inventory availability (2154 pcs). Both parts are supplied in Tape & Reel packaging and carry ROHS3 compliance with MSL 1 rating. This substitute provides direct functional replacement with no design modifications required.

74HC27D,653 (MFR Recommended): This Nexperia USA Inc. part is manufacturer-recommended and maintains all critical electrical parameters including supply voltage, logic thresholds, and output current specifications. The propagation delay is 15ns at 6V with 50pF load, which is 1ns faster than the original specification. The operating temperature range is -40°C ~ 125°C, which is narrower at the low end by 15°C compared to the CD74HC27MT. This part is in active production with substantial inventory (14406 pcs) and is available in Cut Tape and Digi-Reel packaging options. ROHS3 compliance and MSL 1 rating are maintained.

Both substitutes are qualified for direct replacement in applications where the specified electrical and thermal parameters are met.

Frequently Asked Questions (FAQ)

Q: Can the CD74HC27M96 be used as a direct replacement for the CD74HC27MT?

A: Yes. The CD74HC27M96 is a parametric equivalent with identical logic type, circuit count, input configuration, supply voltage range, quiescent current, output current, input logic thresholds, propagation delay, operating temperature range, and package type. Both parts are manufactured by Texas Instruments and carry ROHS3 compliance with MSL 1 rating.

Q: What is the difference between the CD74HC27M96 and 74HC27D,653?

A: Both parts are functionally equivalent NOR gate ICs with identical logic specifications and electrical parameters. The primary differences are: manufacturer (Texas Instruments vs. Nexperia USA Inc.), propagation delay (16ns vs. 15ns at 6V, 50pF), operating temperature range (-55°C ~ 125°C vs. -40°C ~ 125°C), and packaging options (Tape & Reel vs. Cut Tape & Digi-Reel). The 74HC27D,653 offers faster propagation delay and higher inventory availability.

Q: Is the operating temperature difference between CD74HC27MT and 74HC27D,653 significant?

A: The CD74HC27MT operates from -55°C to 125°C, while the 74HC27D,653 operates from -40°C to 125°C. The 15°C difference at the low end may be relevant only for applications requiring operation below -40°C. For standard industrial and commercial temperature ranges, this difference is not a limiting factor.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. The CD74HC27M96 and 74HC27D,653 are both ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level, matching the compliance profile of the original CD74HC27MT.

Q: What packaging options are available for substitutes?

A: The CD74HC27M96 is supplied in Tape & Reel (TR) packaging. The 74HC27D,653 is available in both Cut Tape (CT) and Digi-Reel® packaging options, providing flexibility for different procurement and assembly workflows.

Q: Do the substitute parts have identical pin configurations?

A: Yes. All substitute parts use the 14-SOIC package with identical pin assignments and footprint dimensions (0.154", 3.90mm width), enabling direct PCB-level replacement without layout modifications.