74AC273SCX Equivalent & Substitute Parts

Part Overview

The 74AC273SCX is a D-Type flip-flop logic integrated circuit manufactured by onsemi, featuring 1 element with 8-bit configuration and positive edge triggering. This component is classified as Obsolete, which necessitates identification of equivalent substitute parts for ongoing design requirements and procurement needs. The 20-SOIC package format and specified electrical characteristics define the scope for compatible alternatives.

Substiute Parts

74AC273SCX

onsemiIn Stock: 170174AC273SCX Datasheet

Current PartRFQ

MC74AC273DWG

onsemiIn Stock: 1195MC74AC273DWG Datasheet

SimilarRFQ

MC74AC273DWR2G

onsemiIn Stock: 2843MC74AC273DWR2G Datasheet

Parametric EquivalentRFQ

74AHC273D,118

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

SimilarRFQ

CD74AC273M96

Texas InstrumentsIn Stock: 50290CD74AC273M96 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74AC273SCX are identified based on strict electrical and mechanical compatibility criteria. The following parameters determine substitution eligibility:

Critical Parameters for Substitution:

• D-Type flip-flop configuration with 1 element and 8-bit structure
• Positive edge trigger type
• Non-inverted output type
• Master reset function
• 20-SOIC package format (0.295", 7.50mm Width)
• Surface mount mounting type

Acceptable Parameter Variations:

• Clock frequency may differ (minimum 100 MHz acceptable)
• Propagation delay may vary within functional requirements
• Quiescent current may be lower (improved efficiency)
• Operating temperature range may be extended
• Supply voltage range may be narrower or equivalent
• Product status may be Active (preferred over Obsolete)

The substitute parts listed below maintain functional equivalence while offering improved availability and product status.

Parameter Comparison

Engineering Selection Recommendations

MC74AC273DWG (onsemi, Tube Packaging) This substitute maintains identical electrical specifications to the main part while offering Active product status. The onsemi manufacturer continuity provides design consistency. Quiescent current is reduced to 8 µA, improving power efficiency. Tube packaging format is suitable for lower-volume applications. RoHS3 compliance is confirmed.

MC74AC273DWR2G (onsemi, Tape & Reel Packaging) This part provides identical electrical performance to MC74AC273DWG with Tape & Reel packaging, appropriate for high-volume production environments. Active product status ensures long-term availability. RoHS3 compliance and reduced quiescent current (8 µA) are maintained.

74AHC273D,118 (Nexperia USA Inc., Tape & Reel Packaging) This substitute operates at reduced clock frequency (110 MHz) and propagation delay (11 ns), with lower output current (8 mA). Extended operating temperature range (-40°C ~ 125°C) provides thermal flexibility. Quiescent current is minimized at 4 µA. RoHS3 compliance and MSL 1 rating are confirmed. Supply voltage range is narrower (2V ~ 5.5V).

CD74AC273M96 (Texas Instruments, Tape & Reel Packaging) This part offers the widest operating temperature range (-55°C ~ 125°C) and lowest supply voltage minimum (1.5V). Clock frequency is 100 MHz with 14.6 ns propagation delay. Output current matches the main part (24 mA). RoHS3 compliance and MSL 1 rating are confirmed. Extended temperature capability suits demanding applications.

Frequently Asked Questions (FAQ)

Q: Can MC74AC273DWG be used as a direct replacement for 74AC273SCX? A: Yes. MC74AC273DWG maintains identical electrical specifications including clock frequency (175 MHz), propagation delay (9 ns), supply voltage range (2V ~ 6V), and output current (24 mA). The primary difference is Active product status versus Obsolete, with improved quiescent current (8 µA vs 40 µA).

Q: What is the difference between MC74AC273DWG and MC74AC273DWR2G? A: Both parts are electrically identical. The difference is packaging format: MC74AC273DWG uses Tube packaging for lower-volume applications, while MC74AC273DWR2G uses Tape & Reel packaging for high-volume production. Select based on procurement and assembly requirements.

Q: Why does 74AHC273D,118 have lower output current (8 mA vs 24 mA)? A: The 74AHC273D,118 is from the 74AHC logic family, which operates at lower power levels than the 74AC family. This results in reduced output current capability. Verify that your circuit design can function with 8 mA output current before substitution.

Q: Is the 20-SOIC package identical across all substitute parts? A: Yes. All substitute parts use the 20-SOIC package with 0.295" width and 7.50mm body width, ensuring mechanical compatibility and PCB footprint equivalence.

Q: What does MSL (Moisture Sensitivity Level) mean for component selection? A: MSL indicates moisture sensitivity during storage and handling. MSL 1 (Unlimited) allows indefinite storage without moisture control. MSL 3 (168 Hours) requires controlled storage conditions and must be used within 168 hours of package opening. Select based on your storage and assembly capabilities.

Q: Can CD74AC273M96 operate at temperatures below -40°C? A: Yes. CD74AC273M96 operates from -55°C to 125°C, extending the lower temperature limit by 15°C compared to the main part. This provides additional thermal margin for demanding environments.

Q: Which substitute offers the best power efficiency? A: 74AHC273D,118 provides the lowest quiescent current at 4 µA, followed by the onsemi substitutes at 8 µA. Select based on your power budget requirements and acceptable performance trade-offs.