74AC273MTC Equivalent & Substitute Parts

Part Overview

The 74AC273MTC is a D-Type flip-flop logic integrated circuit manufactured by onsemi, featuring 1 element with 8-bit capacity and positive edge triggering. This component is classified as obsolete, which necessitates identification of active equivalent parts for ongoing design requirements and procurement needs. The part operates across a supply voltage range of 2V to 6V with a maximum clock frequency of 175 MHz, making it suitable for digital logic applications requiring edge-triggered storage and reset functionality.

Substiute Parts

74AC273MTC

onsemiIn Stock: 231074AC273MTC Datasheet

Current PartRFQ

MC74AC273DTR2G

onsemiIn Stock: 3295MC74AC273DTR2G Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74AC273MTC is determined by strict equivalence across the following electrical and mechanical parameters:

Critical Matching Parameters:

• Series designation (74AC)
• Base product number (74AC273)
• Type classification (D-Type flip-flop)
• Number of elements (1) and bits per element (8)
• Package specification (20-TSSOP with identical physical dimensions)
• Trigger type (Positive Edge)
• Output type (Non-Inverted)
• Function (Master Reset)
• Supply voltage range (2V ~ 6V)
• Operating temperature range (-40°C ~ 85°C)

The substitute part MC74AC273DTR2G meets all critical parameters while offering improved performance characteristics and active product status, enabling direct functional replacement in equivalent circuit applications.

Parameter Comparison

Engineering Selection Recommendations

MC74AC273DTR2G is the direct equivalent substitute for 74AC273MTC based on the following engineering criteria:

Functional Equivalence: Both parts share identical logic architecture, pin configuration, and electrical specifications within the 74AC series standard. The 20-TSSOP package dimensions are identical, ensuring PCB layout compatibility without modification.

Performance Enhancement: The substitute part demonstrates improved propagation delay (9ns versus 10ns at 5V, 50pF load) and significantly reduced quiescent current consumption (8 µA versus 40 µA), providing superior power efficiency in battery-powered or low-power applications.

Product Status and Compliance: MC74AC273DTR2G maintains active product status with ROHS3 compliance certification, ensuring long-term availability and regulatory alignment. Both parts maintain REACH Unaffected status and identical moisture sensitivity classification (MSL 1).

Packaging Consideration: The substitute is supplied in Tape & Reel format, standard for high-volume production environments, whereas the original part was supplied in tube packaging. This packaging difference does not affect electrical or mechanical compatibility.

Frequently Asked Questions (FAQ)

Q: Can MC74AC273DTR2G be used as a direct replacement for 74AC273MTC in existing designs?

A: Yes. Both parts are electrically and mechanically equivalent within the 74AC series specification. Identical pin configuration, package dimensions (20-TSSOP), and electrical operating parameters ensure direct substitution without circuit modification.

Q: What are the key differences between these parts?

A: The primary differences are product status (obsolete versus active), packaging format (tube versus Tape & Reel), and performance improvements in the substitute part. Quiescent current is reduced from 40 µA to 8 µA, and propagation delay is improved from 10ns to 9ns. These differences favor the substitute part for new designs.

Q: Are there any compliance or regulatory differences?

A: MC74AC273DTR2G includes ROHS3 compliance certification, whereas the original part does not specify RoHS status. Both parts maintain REACH Unaffected classification and identical MSL 1 rating. For applications requiring RoHS compliance, the substitute part is the appropriate selection.

Q: Does the Tape & Reel packaging affect compatibility?

A: No. Tape & Reel packaging is a supply format difference only and does not affect electrical performance, pin configuration, or mechanical fit. The component itself remains identical in form and function.

Q: What is the significance of the reduced quiescent current in MC74AC273DTR2G?

A: The reduction from 40 µA to 8 µA represents improved power efficiency. This is particularly significant in battery-powered applications or systems with strict power consumption budgets, where the substitute part provides measurable power savings without compromising functionality.

Q: Are both parts suitable for the same operating temperature range?

A: Yes. Both parts operate across the identical temperature range of -40°C to 85°C (TA), ensuring equivalent thermal performance and reliability across all specified environmental conditions.