74AC273MTCX Equivalent & Substitute Parts

Part Overview

The 74AC273MTCX 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, making identification of equivalent and substitute parts essential for ongoing design support and production continuity. The part operates across a supply voltage range of 2V to 6V with a maximum clock frequency of 175 MHz and is packaged in a 20-TSSOP surface mount configuration.

Substiute Parts

74AC273MTCX

onsemiIn Stock: 107174AC273MTCX Datasheet

Current PartRFQ

MC74AC273DTR2G

onsemiIn Stock: 3295MC74AC273DTR2G Datasheet

DirectRFQ

74AHC273PW,118

Nexperia USA Inc.In Stock: 4611874AHC273PW,118 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 74AC273MTCX is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

• Type: D-Type Flip Flop
• Number of Elements: 1
• Number of Bits per Element: 8
• Trigger Type: Positive Edge
• Output Type: Non-Inverted
• Function: Master Reset
• Package / Case: 20-TSSOP (0.173", 4.40mm Width)
• Mounting Type: Surface Mount

Acceptable Variation Parameters:

• Clock Frequency: Substitute must meet or exceed 175 MHz requirement
• Max Propagation Delay: Substitute must meet or exceed performance (lower delay acceptable)
• Voltage - Supply: Substitute range must encompass or exceed 2V ~ 6V
• Operating Temperature: Substitute range must encompass or exceed -40°C ~ 85°C
• Current specifications: Substitute values must be compatible with circuit design requirements

Two substitute parts meet these criteria: MC74AC273DTR2G (direct equivalent from onsemi) and 74AHC273PW,118 (similar logic family from Nexperia USA Inc.).

Parameter Comparison

Engineering Selection Recommendations

MC74AC273DTR2G (onsemi): This part is a direct equivalent within the same 74AC logic family and manufacturer. It maintains identical electrical specifications including clock frequency, propagation delay, supply voltage range, and output current ratings. The part is currently in active production status with RoHS3 compliance certification. Quiescent current is reduced to 8 µA compared to the original 40 µA. This substitute provides the most direct replacement path with no design modifications required.

74AHC273PW,118 (Nexperia USA Inc.): This part operates within the 74AHC logic family, which represents a different technology node. Key differences include reduced clock frequency (110 MHz versus 175 MHz), lower output current capability (8 mA versus 24 mA), and a reduced supply voltage upper limit (5.5V versus 6V). The part offers extended operating temperature range (-40°C to 125°C) and significantly lower quiescent current (4 µA). This substitute is suitable for applications where the lower clock frequency and output current are acceptable, and where the extended temperature range provides design benefit. The part carries RoHS3 compliance certification and is in active production status.

Frequently Asked Questions (FAQ)

Q: Can MC74AC273DTR2G directly replace 74AC273MTCX without circuit modifications?

A: Yes. MC74AC273DTR2G is a direct equivalent within the same 74AC series from onsemi. All critical electrical parameters, package configuration, and functional specifications are identical. No circuit modifications are required.

Q: What are the key differences between 74AC273MTCX and 74AHC273PW,118?

A: The primary differences are: (1) Clock frequency is reduced from 175 MHz to 110 MHz in the 74AHC variant; (2) Output current capability is reduced from 24 mA to 8 mA; (3) Maximum supply voltage is reduced from 6V to 5.5V; (4) Operating temperature range is extended from 85°C to 125°C maximum. These differences must be evaluated against specific circuit requirements.

Q: Is the 20-TSSOP package identical across all three parts?

A: Yes. All three parts use the 20-TSSOP (0.173", 4.40mm Width) surface mount package. PCB footprints and assembly processes are compatible across all substitutes.

Q: What is the impact of reduced quiescent current in the substitute parts?

A: MC74AC273DTR2G reduces quiescent current from 40 µA to 8 µA, and 74AHC273PW,118 reduces it to 4 µA. This results in lower power consumption during idle states, which may provide design benefits in battery-powered or low-power applications.

Q: Are both substitute parts RoHS compliant?

A: Yes. Both MC74AC273DTR2G and 74AHC273PW,118 carry RoHS3 compliance certification. Both parts are REACH unaffected and classified under ECCN EAR99.

Q: Which substitute should be selected for a new design?

A: For new designs, MC74AC273DTR2G is recommended as the primary choice due to identical electrical specifications and active production status. If extended operating temperature range or reduced power consumption is required, 74AHC273PW,118 may be selected provided that the reduced clock frequency (110 MHz) and output current (8 mA) are compatible with circuit requirements.