74VHC273MX Equivalent & Substitute Parts

Part Overview

The 74VHC273MX is an 8-bit D-type flip-flop logic integrated circuit manufactured by onsemi in a 20-SOIC surface mount package. This device functions as a master reset flip-flop with positive edge triggering, designed for digital logic applications requiring high-speed data storage and synchronization. The 74VHC273MX is currently classified as obsolete, necessitating identification of active equivalent and substitute parts that maintain functional and electrical compatibility for ongoing production and maintenance applications.

Substiute Parts

74VHC273MX

onsemiIn Stock: 1552074VHC273MX Datasheet

Current PartRFQ

MC74HC273ADWR2G

onsemiIn Stock: 2388MC74HC273ADWR2G Datasheet

MFR RecommendedRFQ

74AHC273D-Q100J

Nexperia USA Inc.In Stock: 277874AHC273D-Q100J Datasheet

DirectRFQ

SN74AHC273DW

Texas InstrumentsIn Stock: 66426SN74AHC273DW Datasheet

DirectRFQ

SN74AHC273DWR

Texas InstrumentsIn Stock: 3178SN74AHC273DWR Datasheet

DirectRFQ

74AHC273D,118

Nexperia USA Inc.In Stock: 83474AHC273D,118 Datasheet

UpgradeRFQ

74AHCT273D,118

Nexperia USA Inc.In Stock: 286974AHCT273D,118 Datasheet

SimilarRFQ

SN74AHC273NSR

Texas InstrumentsIn Stock: 4360SN74AHC273NSR Datasheet

SimilarRFQ

SN74AHCT273DWR

Texas InstrumentsIn Stock: 6489SN74AHCT273DWR Datasheet

SimilarRFQ

SN74AHCT273NSR

Texas InstrumentsIn Stock: 4199SN74AHCT273NSR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74VHC273MX is determined by the following critical parameters: logic function (D-type flip-flop, 8-bit configuration), package type (20-SOIC form factor), supply voltage compatibility (2V ~ 5.5V range), output drive capability (8mA minimum), and surface mount mounting type. Substitute parts are grouped into three categories based on their relationship to the original specification:

Direct Equivalents maintain identical or superior electrical performance within the original parameter envelope, including clock frequency (110 MHz), propagation delay (11ns or better @ 5V, 50pF), and operating temperature range (-40°C ~ 85°C minimum). These parts are pin-compatible and functionally interchangeable without circuit modification.

Upgrade Alternatives provide enhanced performance characteristics such as extended temperature range (-40°C ~ 125°C) or improved propagation delay while maintaining the core 110 MHz clock frequency and 8mA output drive specification. These parts are suitable for applications requiring broader operational margins.

Compatible Variants operate within acceptable electrical parameters but may have reduced clock frequency (75 MHz or 120 MHz) or restricted supply voltage ranges (4.5V ~ 5.5V). These parts require verification of circuit timing requirements before substitution.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: SN74AHC273DWR (Texas Instruments)

The SN74AHC273DWR provides direct electrical equivalence to the 74VHC273MX with active product status and extended operating temperature range (-40°C ~ 125°C). This part maintains 110 MHz clock frequency, 11ns propagation delay, 2V ~ 5.5V supply voltage compatibility, and 8mA output drive specification. The part is available in Cut Tape & Digi-Reel packaging with 3,162 units in stock. RoHS3 compliance and unlimited moisture sensitivity level (MSL 1) align with the original specification.

Secondary Recommendation: 74AHC273D,118 (Nexperia USA Inc.)

The 74AHC273D,118 offers equivalent performance with 110 MHz clock frequency and 11ns propagation delay. Extended temperature range (-40°C ~ 125°C) and active product status support long-term availability. This part is supplied in Tape & Reel packaging with 821 units in stock. RoHS3 compliance and MSL 1 rating match original requirements.

Alternative for Extended Temperature: 74AHC273D-Q100J (Nexperia USA Inc.)

The 74AHC273D-Q100J provides superior propagation delay (10.5ns) and automotive-grade qualification (AEC-Q100). This part is suitable for applications requiring automotive reliability standards. Operating temperature range extends to -40°C ~ 125°C with 2,719 units available in Tape & Reel packaging.

Consideration for Lower Speed Applications: MC74HC273ADWR2G (onsemi)

The MC74HC273ADWR2G operates at reduced clock frequency (35 MHz) with extended temperature range (-55°C ~ 125°C). This part is suitable only for applications where 35 MHz performance is acceptable. Supply voltage range extends to 6V, providing broader compatibility. 2,300 units are in stock.

Restricted Voltage Supply Applications: 74AHCT273D,118 or SN74AHCT273DWR (Texas Instruments / Nexperia)

The 74AHCT series parts operate within 4.5V ~ 5.5V supply voltage range with reduced clock frequency (75 MHz or 120 MHz). These parts are suitable only for fixed 5V supply applications where the reduced frequency meets timing requirements. Use only when 74AHC alternatives are unavailable.

Frequently Asked Questions (FAQ)

Q: Can the 74VHC273MX be directly replaced with SN74AHC273DWR without circuit modification?

A: Yes. The SN74AHC273DWR maintains identical pin configuration, 20-SOIC package dimensions (0.295", 7.50mm width), and electrical specifications including 110 MHz clock frequency, 11ns propagation delay, and 2V ~ 5.5V supply voltage range. No circuit modification is required.

Q: What is the difference between 74AHC and 74AHCT series parts?

A: The 74AHCT series restricts supply voltage operation to 4.5V ~ 5.5V and reduces clock frequency to 75 MHz or 120 MHz. The 74AHC series maintains 2V ~ 5.5V supply voltage compatibility and 110 MHz clock frequency. Select 74AHC parts for applications requiring full voltage range operation.

Q: Are SN74AHC273NSR and SN74AHC273DWR interchangeable?

A: Both parts maintain identical electrical specifications (110 MHz, 11ns propagation delay, 2V ~ 5.5V supply). The primary difference is package width: SN74AHC273NSR uses 20-SOIC (0.209", 5.30mm width) while SN74AHC273DWR uses 20-SOIC (0.295", 7.50mm width). Verify PCB footprint compatibility before substitution.

Q: Why is MC74HC273ADWR2G listed as a substitute if it operates at only 35 MHz?

A: The MC74HC273ADWR2G is listed as a manufacturer-recommended alternative by