PI74FCT273ATSE Equivalent & Substitute Parts

Part Overview

The PI74FCT273ATSE is a D-type flip-flop logic integrated circuit manufactured by Diodes Incorporated, featuring 1 element with 8-bit positive edge triggering in a 20-SOIC surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

The 74FCT273 series represents a standard logic family for digital applications requiring edge-triggered flip-flop functionality. Substitute parts maintain functional equivalence while offering improved availability, active product status, or enhanced electrical characteristics within the allowed parameter ranges.

Substiute Parts

PI74FCT273ATSE

Diodes IncorporatedIn Stock: 821PI74FCT273ATSE Datasheet

Current PartRFQ

CD74FCT273M

Harris CorporationIn Stock: 7284CD74FCT273M Datasheet

MFR RecommendedRFQ

CY74FCT273ATSOC

Texas InstrumentsIn Stock: 1878CY74FCT273ATSOC Datasheet

MFR RecommendedRFQ

CY74FCT273ATSOCT

Texas InstrumentsIn Stock: 1668CY74FCT273ATSOCT Datasheet

MFR RecommendedRFQ

CY74FCT273CTSOC

Texas InstrumentsIn Stock: 3421CY74FCT273CTSOC Datasheet

MFR RecommendedRFQ

CY74FCT273TSOC

Texas InstrumentsIn Stock: 1298CY74FCT273TSOC Datasheet

MFR RecommendedRFQ

CY74FCT273TSOCT

Texas InstrumentsIn Stock: 4069CY74FCT273TSOCT Datasheet

MFR RecommendedRFQ

SN74ABT273DW

Texas InstrumentsIn Stock: 3508SN74ABT273DW Datasheet

MFR RecommendedRFQ

SN74ABT273NSR

Texas InstrumentsIn Stock: 2281SN74ABT273NSR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PI74FCT273ATSE are selected based on the following criteria:

Functional Equivalence: All substitute parts maintain identical logic function (D-type flip-flop, 1 element, 8-bit, positive edge trigger, non-inverted output, master reset function).

Package Compatibility: All substitutes use the 20-SOIC surface mount package with compatible pinout and footprint.

Electrical Parameters: Substitute parts operate within the allowed voltage supply range (4.5V to 5.5V or 4.75V to 5.25V) and maintain compatible propagation delay, output current, and quiescent current specifications.

Series Compatibility: Substitutes are drawn from the 74FCT and 74ABT logic families, which share functional and electrical compatibility for this application.

Compliance & Availability: Active product status and RoHS3 compliance are prioritized for long-term design support.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Active Status, Full Compliance):

CY74FCT273ATSOC and CY74FCT273ATSOCT from Texas Instruments are direct functional equivalents with active product status and ROHS3 compliance. These parts maintain identical propagation delay (7.2ns) and operating temperature range (-40°C to 85°C) as the original PI74FCT273ATSE, with enhanced output current capability (32mA high vs. 15mA original) and reduced quiescent current (200µA vs. 500µA original).

Alternative Substitutes (Active Status, Enhanced Performance):

CY74FCT273CTSOC offers improved propagation delay (5.8ns) while maintaining full compatibility and active status. CY74FCT273TSOC and CY74FCT273TSOCT provide functional equivalence with longer propagation delay (13ns) but remain suitable for non-timing-critical applications.

Cross-Family Alternative (74ABT Series):

SN74ABT273DW and SN74ABT273NSR from Texas Instruments represent the 74ABT logic family with faster clock frequency (150 MHz) and improved propagation delay (6.8ns). These parts maintain voltage supply compatibility (4.5V to 5.5V) and full operating temperature range. SN74ABT273NSR uses a narrower 20-SOIC package (5.30mm width) compared to the standard 7.50mm width.

Avoid:

CD74FCT273M (Harris Corporation) is obsolete and RoHS non-compliant, offering no advantage over active alternatives.

Frequently Asked Questions (FAQ)

Q: Can CY74FCT273ATSOC directly replace PI74FCT273ATSE?

A: Yes. Both parts share identical logic function, package footprint (20-SOIC, 7.50mm width), pinout, and operating temperature range (-40°C to 85°C). The CY74FCT273ATSOC has active product status and ROHS3 compliance, with enhanced output current and lower quiescent current.

Q: What is the difference between CY74FCT273ATSOC and CY74FCT273ATSOCT?

A: Both parts are electrically identical. The primary difference is packaging: CY74FCT273ATSOC is supplied in tube packaging, while CY74FCT273ATSOCT is supplied in cut tape and digi-reel format. Selection depends on procurement and assembly requirements.

Q: Can I use SN74ABT273DW instead of the 74FCT series?

A: Yes, with consideration of electrical differences. The SN74ABT273DW maintains functional equivalence and operates within the same voltage supply range (4.5V to 5.5V). It offers faster propagation delay (6.8ns) and higher clock frequency (150 MHz), making it suitable for timing-critical applications. Quiescent current is slightly higher (400µA vs. 500µA original).

Q: What is the significance of package width differences (7.50mm vs. 5.30mm)?

A: Both are 20-SOIC packages with identical pinout and electrical function. The 5.30mm width (SN74ABT273NSR) is a narrower variant. PCB footprint compatibility depends on design specifications. Verify footprint requirements before substitution.

Q: Why is CD74FCT273M not recommended?

A: CD74FCT273M is obsolete and RoHS non-compliant. Active alternatives from Texas Instruments (CY74FCT273 and SN74ABT273 series) provide superior availability, compliance status, and electrical performance.

Q: Which substitute offers the best propagation delay?

A: CY74FCT273CTSOC provides the fastest propagation delay at 5.8ns, followed by SN74ABT273DW and SN74ABT273NSR at 6.8ns. The original PI74FCT273ATSE and CY74FCT273ATSOC both specify 7.2ns.

Q: Are all substitutes RoHS3 compliant?

A: All recommended active substitutes (CY74FCT273 series and SN74ABT273 series) are ROHS3 compliant. CD74FCT273M is RoHS non-compliant and should not be used in new designs requiring compliance certification.