74ABT573CMTCX Equivalent & Substitute Parts

Part Overview

The 74ABT573CMTCX is a D-Type Transparent Latch logic IC manufactured by onsemi, featuring an 8:8 circuit configuration with tri-state output capability in a 20-TSSOP surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The part operates within a 4.5V to 5.5V supply voltage range and is suitable for applications requiring transparent latch functionality with tri-state output control.

Substiute Parts

74ABT573CMTCX

onsemiIn Stock: 220174ABT573CMTCX Datasheet

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74LVT573MTCX

Fairchild SemiconductorIn Stock: 4652674LVT573MTCX Datasheet

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SN74ABT573ADBR

Texas InstrumentsIn Stock: 2194SN74ABT573ADBR Datasheet

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SN74ABT573APW

Texas InstrumentsIn Stock: 1516SN74ABT573APW Datasheet

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SN74ABT573APWR

Texas InstrumentsIn Stock: 2970SN74ABT573APWR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the 74ABT573CMTCX is determined by the following critical parameters:

Primary Compatibility Criteria:

• Logic Type: D-Type Transparent Latch
• Circuit Configuration: 8:8
• Output Type: Tri-State
• Independent Circuits: 1
• Operating Temperature Range: -40°C ~ 85°C
• Current Output Capability: 32mA (High), 64mA (Low)

Secondary Compatibility Criteria:

• Supply Voltage Range (must support 4.5V ~ 5.5V or be compatible within application requirements)
• Package Type: 20-TSSOP or 20-SSOP (mechanically compatible with PCB footprints)
• Mounting Type: Surface Mount
• Propagation Delay: Functional equivalence within acceptable timing margins

Substitute parts are grouped into two categories: Direct Equivalents (same voltage range and package) and Compatible Alternatives (same logic function with different voltage specifications or package variants).

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (Recommended Primary Substitutes):

The SN74ABT573APWR, SN74ABT573APW, and SN74ABT573CMTCX variants from Texas Instruments are direct functional and electrical equivalents to the 74ABT573CMTCX. These parts maintain identical supply voltage specifications (4.5V ~ 5.5V), output current ratings (32mA/64mA), operating temperature range (-40°C ~ 85°C), and package footprint (20-TSSOP). All three Texas Instruments variants carry Active product status and ROHS3 compliance certification, providing long-term availability and regulatory alignment. Selection among these three should be based on packaging requirements: SN74ABT573APWR (Tape & Reel) for high-volume production, SN74ABT573APW (Tube) for moderate quantities, and SN74ABT573ADBR (Cut Tape) for smaller orders.

Package Variant Consideration:

The SN74ABT573ADBR is functionally equivalent but uses a 20-SSOP package (0.209", 5.30mm width) instead of the 20-TSSOP (0.173", 4.40mm width). This package difference requires PCB footprint verification before selection. The wider SSOP package may not be compatible with existing 20-TSSOP layouts without redesign.

Alternative Voltage Domain:

The 74LVT573MTCX from Fairchild Semiconductor operates at a lower voltage range (2.7V ~ 3.6V) and is suitable only for applications where the system voltage domain is 3.3V or lower. This part is not recommended as a direct substitute for 5V systems but serves as an alternative for 3.3V logic environments. The 74LVT573MTCX maintains identical output current capability and operating temperature range but exhibits slightly higher propagation delay (4.4ns versus 2.7ns).

Compliance and Availability:

All Texas Instruments substitutes carry ROHS3 compliance and Unlimited MSL ratings, ensuring compatibility with modern manufacturing processes and long-term storage without moisture sensitivity concerns. The Fairchild 74LVT573MTCX does not specify RoHS status in the provided data.

Frequently Asked Questions (FAQ)

Q: Can the 74LVT573MTCX replace the 74ABT573CMTCX in a 5V system?

A: No. The 74LVT573MTCX operates at 2.7V ~ 3.6V supply voltage and is not rated for 5V operation. Using this part in a 5V system will result in component failure or unpredictable behavior. The 74LVT573MTCX is suitable only for 3.3V logic systems.

Q: What is the difference between the SN74ABT573APWR, SN74ABT573APW, and SN74ABT573ADBR?

A: These three parts are electrically and functionally identical. The differences are packaging and delivery format: APWR is supplied in Tape & Reel format for automated assembly, APW is supplied in Tube format for manual handling, and ADBR is supplied in Cut Tape format. All three use the 20-TSSOP package and are direct equivalents to the 74ABT573CMTCX.

Q: Is the SN74ABT573ADBR compatible with existing 74ABT573CMTCX PCB layouts?

A: The SN74ABT573ADBR uses a 20-SSOP package (5.30mm width) while the 74ABT573CMTCX uses a 20-TSSOP package (4.40mm width). These packages have different footprints and are not mechanically interchangeable. PCB redesign is required to accommodate the SSOP package.

Q: Why is the 74ABT573CMTCX listed as obsolete?

A: The 74ABT573CMTCX is an older onsemi product. Active alternatives from Texas Instruments (SN74ABT573 series) provide equivalent functionality with current product status, ensuring long-term availability and support.

Q: What are the key parameters that determine substitution compatibility?

A: The critical parameters are logic type (D-Type Transparent Latch), circuit configuration (8:8), output type (tri-state), supply voltage range compatibility, output current capability (32mA/64mA), operating temperature range (-40°C ~ 85°C), and package type (20-TSSOP or compatible 20-SSOP). All substitute parts must match these specifications.

Q: Are all substitute parts ROHS3 compliant?

A: The Texas Instruments variants (SN74ABT573APWR, SN74ABT573APW, SN74ABT573ADBR) are explicitly ROHS3 compliant. The Fairchild 74LVT573MTCX and onsemi 74ABT573CMTCX do not specify RoHS status in the provided data. For applications requiring RoHS compliance, use the Texas Instruments alternatives.