74ABT373CMSA Equivalent & Substitute Parts

Part Overview

The 74ABT373CMSA is a D-Type Transparent Latch IC with 8:8 circuit configuration and tri-state output capability, manufactured by onsemi in a 20-SSOP surface mount package. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity. The part operates within the 4.5V to 5.5V supply voltage range and is suitable for applications requiring transparent latch functionality with tri-state output control.

Substiute Parts

74ABT373CMSA

onsemiIn Stock: 71674ABT373CMSA Datasheet

Current PartRFQ

SN74ABT373DBR

Texas InstrumentsIn Stock: 2554SN74ABT373DBR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74ABT373CMSA is determined by strict equivalence across the following critical parameters:

• Logic Type & Circuit Configuration: Both parts must be D-Type Transparent Latch with 8:8 circuit configuration
• Output Type: Tri-state output capability is required
• Supply Voltage Range: 4.5V ~ 5.5V compatibility is mandatory
• Package & Mounting: 20-SSOP surface mount package with identical physical dimensions (0.209", 5.30mm Width)
• Operating Temperature Range: -40°C ~ 85°C operational capability
• Independent Circuits: Single channel (1) configuration

The SN74ABT373DBR from Texas Instruments meets all these substitution criteria, providing functional and mechanical compatibility with the 74ABT373CMSA.

Parameter Comparison

Engineering Selection Recommendations

The SN74ABT373DBR is a direct functional substitute for the 74ABT373CMSA. The primary distinction is product status: the 74ABT373CMSA is obsolete, while the SN74ABT373DBR maintains active production status from Texas Instruments. The SN74ABT373DBR carries ROHS3 compliance certification, providing additional regulatory alignment for new designs. Both parts share identical electrical specifications, package geometry, and operating parameters, ensuring pin-for-pin and functional compatibility. The propagation delay differential (2.7ns vs. 4.6ns) reflects manufacturing process variations between manufacturers but does not affect functional substitution within standard logic circuit applications.

Frequently Asked Questions (FAQ)

Q: Can the SN74ABT373DBR replace the 74ABT373CMSA in existing designs?

A: Yes. Both parts are functionally equivalent D-Type Transparent Latch ICs with identical 8:8 circuit configuration, tri-state output, supply voltage range (4.5V ~ 5.5V), operating temperature range (-40°C ~ 85°C), and 20-SSOP package dimensions. Pin-for-pin substitution is direct.

Q: What is the significance of the propagation delay difference (2.7ns vs. 4.6ns)?

A: The propagation delay difference reflects manufacturing process variations between onsemi and Texas Instruments. Both values fall within acceptable ranges for standard logic applications. Timing-critical applications should verify the 4.6ns specification against circuit requirements.

Q: Why is the 74ABT373CMSA listed as obsolete?

A: Obsolete status indicates the part is no longer in active production by onsemi. The SN74ABT373DBR from Texas Instruments provides continued availability and active product support for this logic function.

Q: Are there compliance differences between these parts?

A: The SN74ABT373DBR carries ROHS3 compliance certification. Both parts maintain REACH Unaffected status. For applications requiring specific regulatory compliance, the SN74ABT373DBR provides documented ROHS3 alignment.

Q: Is the packaging identical between both parts?

A: Yes. Both parts use the 20-SSOP surface mount package with identical physical dimensions (0.209" width, 5.30mm). PCB footprints and reflow profiles are compatible.