74ACT273SJ Equivalent & Substitute Parts

Part Overview

The 74ACT273SJ is a D-Type flip-flop logic integrated circuit manufactured by onsemi, featuring 1 element with 8-bit configuration and positive edge triggering. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and production continuity. The part operates within the 74ACT logic family standard, providing master reset functionality with non-inverted outputs in a 20-SOIC surface mount package.

Substiute Parts

74ACT273SJ

onsemiIn Stock: 90274ACT273SJ Datasheet

Current PartRFQ

CD74ACT273M96

Texas InstrumentsIn Stock: 1481CD74ACT273M96 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74ACT273SJ is determined by strict alignment with the following core parameters:

Critical Substitution Criteria:

• Logic family: 74ACT series
• Functional type: D-Type flip-flop
• Configuration: 1 element, 8-bit
• Output configuration: Non-inverted
• Trigger mechanism: Positive edge
• Function: Master reset capability
• Supply voltage range: 4.5V ~ 5.5V (minimum overlap required)
• Package type: 20-SOIC surface mount
• Mounting compatibility: Surface mount

The CD74ACT273M96 manufactured by Texas Instruments meets all critical substitution criteria within the 74ACT logic family, maintaining functional equivalence and pin compatibility despite differences in secondary performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The CD74ACT273M96 from Texas Instruments is a functional substitute for the obsolete 74ACT273SJ. Both components maintain identical logic family classification, functional architecture, and electrical interface specifications within the 74ACT standard.

Compliance Status: The CD74ACT273M96 carries active product status with RoHS3 compliance certification, providing regulatory continuity for new designs and production environments. Both parts maintain REACH unaffected status and EAR99 export classification.

Operational Considerations: The substitute part demonstrates lower quiescent current consumption (8 µA versus 40 µA) and extended operating temperature range (-55°C ~ 125°C versus -40°C ~ 85°C), offering improved performance margins in power-sensitive and temperature-extreme applications. The CD74ACT273M96 operates at reduced clock frequency (80 MHz versus 189 MHz) with correspondingly longer propagation delay (14.6 ns versus 8.5 ns), which may require timing verification in high-speed signal path applications.

Package Consideration: Physical package dimensions differ between the two parts (0.209" versus 0.295" width in 20-SOIC configuration). PCB layout and component placement must accommodate the larger footprint of the substitute part.

Frequently Asked Questions (FAQ)

Q: Can the CD74ACT273M96 directly replace the 74ACT273SJ in existing designs?

A: Pin configuration and functional behavior are identical, enabling direct substitution at the component level. PCB layout modifications may be required due to package width differences (0.209" versus 0.295"). Timing analysis is recommended for applications operating near the 189 MHz specification of the original part, as the substitute operates at 80 MHz maximum clock frequency.

Q: What are the key differences between these parts?

A: Both parts are functionally equivalent D-Type flip-flops within the 74ACT logic family. Primary differences include manufacturer (onsemi versus Texas Instruments), product status (obsolete versus active), clock frequency rating (189 MHz versus 80 MHz), propagation delay (8.5 ns versus 14.6 ns), quiescent current (40 µA versus 8 µA), and operating temperature range (-40°C to 85°C versus -55°C to 125°C).

Q: Are there compliance or regulatory differences?

A: The CD74ACT273M96 carries RoHS3 compliance certification, while the 74ACT273SJ is obsolete. Both maintain REACH unaffected status. For new production or regulated applications, the active status and RoHS3 compliance of the substitute part provide regulatory alignment.

Q: Does the package size difference affect compatibility?

A: Both parts use 20-SOIC surface mount packaging with identical pin configuration. The physical width difference (0.209" versus 0.295") requires PCB layout verification to ensure component placement compatibility with existing footprints and adjacent component spacing.

Q: Which part should be selected for new designs?

A: The CD74ACT273M96 is the appropriate selection for new designs, as it maintains active product status, RoHS3 compliance, and extended operating specifications. The 74ACT273SJ is obsolete and should be replaced in ongoing production.