74ACT273MTCX Equivalent & Substitute Parts

Part Overview

The 74ACT273MTCX is a D-type flip-flop logic integrated circuit manufactured by onsemi, featuring 1 element with 8-bit parallel data storage capability. This component is classified as obsolete, which necessitates identification of functionally equivalent alternatives for new designs and ongoing production requirements. The part operates as a master reset flip-flop with positive edge triggering and non-inverted outputs, suitable for digital logic applications requiring synchronous data capture and storage.

Substiute Parts

74ACT273MTCX

onsemiIn Stock: 384874ACT273MTCX Datasheet

Current PartRFQ

MC74ACT273DTR2G

onsemiIn Stock: 9875MC74ACT273DTR2G Datasheet

DirectRFQ

74AHCT273PW,118

Nexperia USA Inc.In Stock: 1050374AHCT273PW,118 Datasheet

SimilarRFQ

CD74ACT273PWR

Texas InstrumentsIn Stock: 17179CD74ACT273PWR Datasheet

SimilarRFQ

CD74ACT273SM96

Texas InstrumentsIn Stock: 2168CD74ACT273SM96 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74ACT273MTCX is determined by the following critical parameters:

Core Functional Requirements:

• D-Type flip-flop architecture with 8-bit configuration
• Master reset function with positive edge triggering
• Non-inverted output type
• 20-pin package format

Electrical Compatibility Parameters:

• Supply voltage range: 4.5V ~ 5.5V
• Output current capability: 24mA (high and low)
• Input capacitance: 4.5 pF
• Quiescent current: 40 µA maximum

Physical Compatibility:

• Surface mount technology
• 20-TSSOP or 20-SSOP package variants

Substitute parts are classified into two categories: direct manufacturer equivalents (same series, active status) and similar cross-manufacturer alternatives (compatible series, active status). All identified substitutes maintain functional equivalence while offering improved product availability and active manufacturing status.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: MC74ACT273DTR2G

The MC74ACT273DTR2G is the direct onsemi equivalent with active product status. This part maintains identical electrical specifications including 24mA output current, matching supply voltage range, and equivalent propagation delay characteristics. The part is available in Tape & Reel packaging with superior inventory availability (9815 pcs). Selection of this part eliminates cross-manufacturer qualification requirements and maintains design continuity within the onsemi 74ACT series ecosystem.

Secondary Recommendation: CD74ACT273PWR

The CD74ACT273PWR from Texas Instruments provides an active alternative within the 74ACT series. This part maintains full electrical compatibility with 24mA output current and identical supply voltage specifications. Extended operating temperature range (-55°C ~ 125°C) provides additional thermal margin for demanding applications. Inventory availability is substantial (17100 pcs). This selection is appropriate when Texas Instruments supply chain preference or qualification requirements are established.

Alternative Consideration: 74AHCT273PW,118

The 74AHCT273PW,118 from Nexperia USA Inc. represents a cross-series alternative within the 74AHCT logic family. This part exhibits reduced output current (8mA versus 24mA) and lower quiescent current (4 µA versus 40 µA), making it suitable for power-constrained applications. Extended operating temperature range (-40°C ~ 125°C) and improved propagation delay (9.2ns) support high-speed logic applications. Selection requires verification that reduced output drive capability meets circuit loading requirements.

Package Consideration: CD74ACT273SM96

The CD74ACT273SM96 is functionally equivalent but uses a 20-SSOP package (0.209" width) instead of the standard 20-TSSOP format. This part is suitable only for designs with PCB layout accommodation for the wider package footprint. Electrical specifications are identical to the CD74ACT273PWR variant.

Frequently Asked Questions (FAQ)

Q: Can MC74ACT273DTR2G be used as a direct replacement for 74ACT273MTCX?

A: Yes. Both parts are onsemi 74ACT series D-type flip-flops with identical functional specifications, electrical parameters, and 20-TSSOP packaging. The MC74ACT273DTR2G maintains active product status and is the recommended direct substitute.

Q: What is the difference between 74ACT and 74AHCT series parts?

A: The 74AHCT series (represented by 74AHCT273PW,118) is a different logic family with reduced output current (8mA versus 24mA) and lower power consumption. Both families operate at identical supply voltages (4.5V ~ 5.5V) and maintain TTL-compatible logic levels. Selection between series depends on circuit loading requirements and power budget constraints.

Q: Are there package compatibility issues between 20-TSSOP and 20-SSOP variants?

A: Yes. The 20-TSSOP package (0.173" width) and 20-SSOP package (0.209" width) have different physical footprints. The CD74ACT273SM96 (20-SSOP variant) requires PCB layout modification and cannot be used as a direct pin-compatible replacement without redesign.

Q: What is the significance of the obsolete product status for 74ACT273MTCX?

A: Obsolete status indicates that onsemi has discontinued manufacturing and support for this specific part number. Active substitute parts ensure continued supply chain availability, manufacturer technical support, and compliance with current manufacturing standards. Migration to an active equivalent is recommended for new designs and production continuity.

Q: Do all substitute parts meet RoHS3 compliance?

A: Yes. All identified substitute parts (MC74ACT273DTR2G, 74AHCT273PW,118, CD74ACT273PWR, and CD74ACT273SM96) are ROHS3 compliant. The original 74ACT273MTCX RoHS status is not specified in available documentation.

Q: Which substitute part offers the best performance characteristics?

A: The MC74ACT273DTR2G provides the highest clock frequency (200 MHz) and fastest propagation delay (11ns), making it optimal for high-speed applications. The 74AHCT273PW,118 offers the lowest quiescent current (4 µA) and fastest propagation delay (9.2ns), making it suitable for power-sensitive designs.