74ABT273CSJX Equivalent & Substitute Parts

Part Overview

The 74ABT273CSJX 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, making equivalent and substitute parts necessary for ongoing design support and procurement.

The 74ABT273 series operates at 200 MHz clock frequency with 6.8ns maximum propagation delay at 5V with 50pF load. It is designed for applications requiring high-speed digital logic switching with master reset functionality and non-inverted outputs.

Substiute Parts

74ABT273CSJX

onsemiIn Stock: 107974ABT273CSJX Datasheet

Current PartRFQ

SN74ABT273NS

Texas InstrumentsIn Stock: 1048SN74ABT273NS Datasheet

DirectRFQ

SN74ABT273NSR

Texas InstrumentsIn Stock: 2281SN74ABT273NSR Datasheet

DirectRFQ

CY74FCT273ATSOC

Texas InstrumentsIn Stock: 1878CY74FCT273ATSOC Datasheet

SimilarRFQ

CY74FCT273ATSOCT

Texas InstrumentsIn Stock: 1668CY74FCT273ATSOCT Datasheet

SimilarRFQ

CY74FCT273TSOCT

Texas InstrumentsIn Stock: 4069CY74FCT273TSOCT Datasheet

SimilarRFQ

SN74ABT273DW

Texas InstrumentsIn Stock: 3508SN74ABT273DW Datasheet

SimilarRFQ

SN74ABT273DWR

Texas InstrumentsIn Stock: 8569SN74ABT273DWR Datasheet

SimilarRFQ

SN74LS273DWR

Texas InstrumentsIn Stock: 3092SN74LS273DWR Datasheet

SimilarRFQ

SN74LS273NSR

Texas InstrumentsIn Stock: 2215SN74LS273NSR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74ABT273CSJX is determined by the following critical parameters:

Core Functional Requirements:

• Type: D-Type Flip-Flop
• Number of Elements: 1
• Number of Bits per Element: 8
• Trigger Type: Positive Edge
• Output Type: Non-Inverted
• Function: Master Reset

Electrical Compatibility Parameters:

• Voltage Supply Range: 4.5V ~ 5.5V (or compatible subset)
• Current Output Capability: 32mA (High), 64mA (Low) minimum
• Package / Case: 20-SOIC form factor

Performance Considerations:

• Clock Frequency: 200 MHz or higher
• Max Propagation Delay: 6.8ns or faster at specified conditions
• Operating Temperature: -40°C ~ 85°C or compatible range

Substitute parts are classified into two categories:

Direct Substitutes: Parts meeting all core functional and electrical requirements with identical or superior performance characteristics and active product status.

Similar Substitutes: Parts meeting core functional requirements with variations in performance parameters (propagation delay, clock frequency) or package dimensions (0.295" width vs. 0.209" width), requiring design verification for specific applications.

Parameter Comparison

Engineering Selection Recommendations

Direct Substitutes (Recommended Primary Options):

SN74ABT273NS and SN74ABT273NSR are direct substitutes manufactured by Texas Instruments in the 74ABT series. Both maintain identical functional specifications, electrical characteristics, and package dimensions (20-SOIC 0.209" width) as the 74ABT273CSJX. Both parts are active products with ROHS3 compliance. The NSR variant includes Tape & Reel packaging for automated assembly environments. These parts are suitable for direct replacement in existing designs without PCB modification.

Compatible Substitutes (Performance-Equivalent):

SN74ABT273DW and SN74ABT273DWR are Texas Instruments 74ABT series parts with identical electrical performance (6.8ns propagation delay, 150 MHz clock frequency) but feature a wider 20-SOIC package (0.295" width). These parts require PCB layout verification due to package dimension differences. Both are active products with ROHS3 compliance. The DWR variant includes Tape & Reel packaging.

Similar Substitutes (Performance Variation):

CY74FCT273ATSOC, CY74FCT273ATSOCT, and CY74FCT273TSOCT are Texas Instruments 74FCT series parts with slightly degraded propagation delay performance (7.2ns to 13ns) and narrower supply voltage range (4.75V ~ 5.25V). These parts feature the wider 20-SOIC package (0.295" width) and are active products with ROHS3 compliance. Selection requires confirmation that the reduced performance margin is acceptable for the application.

Legacy Substitutes (Performance Degradation):

SN74LS273DWR and SN74LS273NSR are Texas Instruments 74LS series parts with significantly reduced performance (40 MHz clock frequency, 27ns propagation delay) and lower output current capability (400µA high, 8mA low). Operating temperature range is restricted to 0°C ~ 70°C. These parts are suitable only for non-critical legacy applications where performance margin is not a constraint. Both are active products with ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can SN74ABT273NS directly replace 74ABT273CSJX without PCB modification?

A: Yes. SN74ABT273NS is a direct substitute with identical package dimensions (20-SOIC 0.209" width), electrical specifications, and functional characteristics. No PCB layout changes are required.

Q: What is the difference between SN74ABT273NS and SN74ABT273NSR?

A: Both parts are electrically and functionally identical. The primary difference is packaging format: NS is supplied in tube packaging, while NSR is supplied in Tape & Reel format for automated assembly processes.

Q: Can I use SN74ABT273DW or SN74ABT273DWR as substitutes?

A: These parts are functionally compatible but feature a wider package body (0.295" vs. 0.209"). PCB layout verification is required to confirm the larger package footprint does not create mechanical interference or routing conflicts.

Q: What are the limitations of CY74FCT273 series substitutes?

A: CY74FCT273 parts have slightly slower propagation delay (7.2ns to 13ns vs. 6.8ns) and a narrower supply voltage range (4.75V ~ 5.25V vs. 4.5V ~ 5.5V). These parts are suitable only if the application timing margin accommodates the reduced performance.

Q: Are 74LS273 series parts suitable replacements?

A: SN74LS273DWR and SN74LS273NSR are functionally compatible but exhibit significantly degraded performance (40 MHz clock frequency, 27ns propagation delay) and restricted operating temperature (0°C ~ 70°C). These parts are suitable only for legacy applications where performance requirements are minimal.

Q: What compliance certifications apply to substitute parts?

A: All active substitute parts listed are ROHS3 compliant. The original 74ABT273CSJX compliance status is not specified in available documentation. All parts carry ECCN EAR99 classification and HTSUS code 8542.39.0001 (or 8542.39.0060 for specific variants).

Q: How do I select between multiple substitute options?

A: Selection priority: (1) Direct substitutes (SN74ABT273NS/NSR) for identical performance and package; (2) Compatible substitutes (SN74ABT273DW/DWR) if package width variation is acceptable; (3) Similar substitutes (CY74FCT273 series) only if timing margin analysis confirms suitability; (4) Legacy substitutes (SN74LS273 series) only for non-critical applications.