74ABT273CSCX Equivalent & Substitute Parts

Part Overview

The 74ABT273CSCX is a D-type flip-flop logic integrated circuit manufactured by onsemi, featuring 1 element with 8-bit parallel data storage capability. This device operates as a master reset flip-flop with positive edge triggering and non-inverted outputs. The part is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. Substitute parts must maintain functional compatibility across D-type flip-flop architecture, bit width, and electrical performance parameters.

Substiute Parts

74ABT273CSCX

onsemiIn Stock: 435874ABT273CSCX Datasheet

Current PartRFQ

SN74ABT273DW

Texas InstrumentsIn Stock: 3508SN74ABT273DW Datasheet

DirectRFQ

SN74ABT273DWR

Texas InstrumentsIn Stock: 8569SN74ABT273DWR Datasheet

DirectRFQ

CY74FCT273ATSOCT

Texas InstrumentsIn Stock: 1668CY74FCT273ATSOCT Datasheet

SimilarRFQ

CY74FCT273CTSOC

Texas InstrumentsIn Stock: 3421CY74FCT273CTSOC Datasheet

SimilarRFQ

CY74FCT273TSOCT

Texas InstrumentsIn Stock: 4069CY74FCT273TSOCT Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74ABT273CSCX are grouped based on the following critical parameters that determine functional and electrical compatibility:

Primary Compatibility Criteria:

• Package / Case: 20-SOIC (0.295", 7.50mm Width)
• Type: D-Type Flip-Flop
• Number of Elements: 1
• Number of Bits per Element: 8
• Function: Master Reset
• Output Type: Non-Inverted
• Trigger Type: Positive Edge
• Mounting Type: Surface Mount
• Operating Temperature: -40°C ~ 85°C (TA)

Secondary Performance Parameters:

• Voltage - Supply: 4.5V ~ 5.5V (or compatible range)
• Current - Output High, Low: 32mA, 64mA
• Max Propagation Delay @ V, Max CL: Within acceptable timing specifications
• Current - Quiescent (Iq): Acceptable power consumption levels

Substitutes are classified as Direct (identical series and specifications) or Similar (different series with compatible electrical characteristics).

Parameter Comparison

Engineering Selection Recommendations

Direct Substitutes (74ABT Series):

SN74ABT273DW and SN74ABT273DWR are direct substitutes from Texas Instruments within the same 74ABT logic family. Both parts maintain identical functional specifications and electrical performance characteristics as the 74ABT273CSCX. The primary difference is packaging format: SN74ABT273DW is supplied in Tube packaging, while SN74ABT273DWR is supplied in Tape & Reel (TR) format. Both parts are Active status products with ROHS3 compliance, providing long-term availability and regulatory compliance advantages over the obsolete onsemi part.

Similar Substitutes (74FCT Series):

CY74FCT273ATSOCT, CY74FCT273CTSOC, and CY74FCT273TSOCT are from the 74FCT logic family, also manufactured by Texas Instruments. These parts maintain functional compatibility with identical package, element count, and bit width specifications. The 74FCT series operates within a narrower supply voltage range (4.75V ~ 5.25V) compared to the 74ABT series (4.5V ~ 5.5V). All three 74FCT variants are Active status products with ROHS3 compliance. Propagation delay characteristics vary across the 74FCT options, with CY74FCT273CTSOC offering the fastest timing (5.8ns) and CY74FCT273TSOCT offering the slowest (13ns).

Compliance and Availability:

All substitute parts carry REACH Unaffected status and ROHS3 compliance, meeting current regulatory requirements. The Active product status of all substitutes ensures ongoing availability and manufacturer support, contrasting with the obsolete status of the original 74ABT273CSCX.

Frequently Asked Questions (FAQ)

Q: Can SN74ABT273DW and SN74ABT273DWR be used interchangeably with the 74ABT273CSCX?

A: Yes. Both Texas Instruments parts are direct substitutes within the 74ABT series. They maintain identical functional specifications, electrical performance, and package configuration. The difference between DW and DWR is packaging format only (Tube versus Tape & Reel), not electrical characteristics.

Q: What is the difference between 74ABT and 74FCT series substitutes?

A: Both series provide D-type flip-flop functionality in identical 20-SOIC packages with matching element and bit configurations. The 74ABT series operates across 4.5V ~ 5.5V supply voltage, while 74FCT operates across 4.75V ~ 5.25V. Propagation delay specifications vary within the 74FCT family. Both series are functionally compatible for the specified application parameters.

Q: Are there supply voltage compatibility concerns when substituting 74FCT parts?

A: The 74FCT series operates within a narrower supply voltage window (4.75V ~ 5.25V) compared to the 74ABT series (4.5V ~ 5.5V). If your application requires operation at the lower end of the 4.5V ~ 4.75V range, 74ABT substitutes (SN74ABT273DW or SN74ABT273DWR) are required. For applications operating within 4.75V ~ 5.25V, both series are compatible.

Q: What packaging options are available for substitute parts?

A: SN74ABT273DW is supplied in Tube packaging. SN74ABT273DWR is supplied in Tape & Reel (TR) format. CY74FCT273ATSOCT is supplied in Cut Tape (CT) & Digi-Reel format. CY74FCT273CTSOC is supplied in Tube packaging. CY74FCT273TSOCT is supplied in Tape & Reel (TR) format. All parts use the same 20-SOIC (0.295", 7.50mm Width) package case.

Q: Do all substitute parts meet current regulatory compliance standards?

A: Yes. All substitute parts carry ROHS3 compliance and REACH Unaffected status, meeting current regulatory requirements for electronic components. The obsolete 74ABT273CSCX does not specify RoHS status.

Q: How do quiescent current specifications compare across substitutes?

A: The 74ABT273CSCX specifies 50 µA quiescent current. SN74ABT273DW and SN74ABT273DWR specify 400 µA. The 74FCT series variants (CY74FCT273ATSOCT, CY74FCT273CTSOC, CY74FCT273TSOCT) specify 200 µA. Applications with strict power consumption requirements should account for these differences.

Q: Which substitute offers the fastest propagation delay?

A: CY74FCT273CTSOC offers the fastest propagation delay at 5.8ns @ 50pF. For timing-critical applications, this part provides the best performance among available substitutes.