74ABT273CSC Equivalent & Substitute Parts

Part Overview

The 74ABT273CSC 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 equivalent and substitute parts for ongoing design support and procurement continuity. The 20-SOIC package format and master reset functionality define its application scope in digital logic circuits requiring synchronous data storage and control.

Substiute Parts

74ABT273CSC

onsemiIn Stock: 120974ABT273CSC Datasheet

Current PartRFQ

SN74ABT273DW

Texas InstrumentsIn Stock: 3508SN74ABT273DW Datasheet

DirectRFQ

SN74ABT273DWR

Texas InstrumentsIn Stock: 8569SN74ABT273DWR Datasheet

DirectRFQ

CD74FCT273M

Harris CorporationIn Stock: 7284CD74FCT273M Datasheet

SimilarRFQ

CY74FCT273TSOC

Texas InstrumentsIn Stock: 1298CY74FCT273TSOC Datasheet

SimilarRFQ

SN74LS273NSR

Texas InstrumentsIn Stock: 2215SN74LS273NSR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74ABT273CSC are classified based on the following critical parameters that determine functional and mechanical compatibility:

Primary Compatibility Criteria:

• Package format: 20-SOIC (0.295", 7.50mm Width) or compatible 20-SOIC variants
• Functional type: D-Type flip-flop with 1 element, 8-bit configuration
• Trigger mechanism: Positive edge triggering
• Output type: Non-inverted
• Function: Master reset capability

Substitution Categories:

Direct Substitutes (74ABT Series): SN74ABT273DW and SN74ABT273DWR maintain identical functional specifications, package dimensions, and electrical characteristics within the same 74ABT logic family. These parts are active products with current manufacturing status.

Similar Substitutes (74FCT Series): CD74FCT273M and CY74FCT273TSOC provide equivalent D-type flip-flop functionality with 8-bit capacity in the same 20-SOIC package. The 74FCT series operates within compatible voltage ranges and maintains the same trigger and output characteristics, though with different propagation delay and quiescent current specifications.

Compatible Substitutes (74LS Series): SN74LS273NSR offers D-type flip-flop functionality with 8-bit capacity in a 20-SOIC package variant (0.209", 5.30mm Width). This part operates within compatible voltage ranges and maintains functional equivalence, though with reduced clock frequency and increased propagation delay.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation - Direct Substitutes:

SN74ABT273DW and SN74ABT273DWR are the preferred substitutes for the obsolete 74ABT273CSC. Both parts maintain identical propagation delay (6.8ns @ 5V, 50pF), output current ratings (32mA, 64mA), and package dimensions (20-SOIC, 0.295", 7.50mm Width). Both are active products with ROHS3 compliance and unlimited moisture sensitivity rating. SN74ABT273DWR is supplied in Tape & Reel format with higher inventory availability (8485 Pcs), while SN74ABT273DW is supplied in Tube format (3400 Pcs). The primary difference is packaging format and quiescent current specification (400 µA versus 50 µA in the original part), which may impact power consumption in standby conditions.

Secondary Recommendation - 74FCT Series:

CY74FCT273TSOC is an active product substitute offering equivalent D-type flip-flop functionality with 8-bit capacity in the same 20-SOIC package. This part maintains identical output current ratings (32mA, 64mA) and operating temperature range (-40°C ~ 85°C). The propagation delay is increased to 13ns @ 50pF, and quiescent current is 200 µA. This part is suitable for applications where the reduced clock frequency and increased propagation delay are acceptable. ROHS3 compliance and unlimited moisture sensitivity rating are provided.

CD74FCT273M is an obsolete product and should be avoided for new designs despite current inventory availability.

Tertiary Recommendation - 74LS Series:

SN74LS273NSR is an active product offering D-type flip-flop functionality with 8-bit capacity. This part operates within compatible voltage ranges (4.75V ~ 5.25V) and maintains the same functional architecture. However, the clock frequency is reduced to 40 MHz, propagation delay is increased to 27ns @ 5V, 15pF, and quiescent current is significantly higher at 27 mA. The package variant is 20-SOIC (0.209", 5.30mm Width), which differs from the original part dimensions. This substitute is suitable only for applications where reduced performance specifications are acceptable and the package dimension difference can be accommodated in the PCB layout.

Frequently Asked Questions (FAQ)

Q: Can SN74ABT273DW or SN74ABT273DWR be used as direct replacements for 74ABT273CSC?

A: Yes. Both parts are direct substitutes with identical propagation delay, output current ratings, and package dimensions. The primary difference is quiescent current (400 µA versus 50 µA), which may affect power consumption in standby conditions. Both are active products with current manufacturing support and ROHS3 compliance.

Q: What is the difference between SN74ABT273DW and SN74ABT273DWR?

A: Both parts are electrically identical. The difference is packaging format: SN74ABT273DW is supplied in Tube format, while SN74ABT273DWR is supplied in Tape & Reel (TR) format. SN74ABT273DWR has higher inventory availability (8485 Pcs versus 3400 Pcs).

Q: Can CY74FCT273TSOC be used as a substitute?

A: Yes, with performance