74ACT373MTCX Equivalent & Substitute Parts

Part Overview

The 74ACT373MTCX 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 identification of functionally equivalent alternatives essential for ongoing design support and production continuity. The part operates within a 4.5V to 5.5V supply voltage range with 8ns propagation delay and 24mA output drive capability.

Substiute Parts

74ACT373MTCX

onsemiIn Stock: 76974ACT373MTCX Datasheet

Current PartRFQ

MC74ACT373DTR2G

onsemiIn Stock: 3516MC74ACT373DTR2G Datasheet

DirectRFQ

SN74ACT373PW

Texas InstrumentsIn Stock: 1562SN74ACT373PW Datasheet

DirectRFQ

SN74ACT373PWR

Texas InstrumentsIn Stock: 3359SN74ACT373PWR Datasheet

DirectRFQ

SN74ACT373DBR

Texas InstrumentsIn Stock: 3121SN74ACT373DBR Datasheet

SimilarRFQ

SN74ACT563PWR

Texas InstrumentsIn Stock: 6245SN74ACT563PWR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74ACT373MTCX is determined by the following critical parameters: logic type (D-Type Transparent Latch), circuit configuration (8:8), output type (tri-state), supply voltage range (4.5V ~ 5.5V), output current capability (24mA minimum), operating temperature range (-40°C ~ 85°C), and package compatibility (20-TSSOP or mechanically equivalent).

Substitute parts are categorized into three groups:

Direct Substitutes maintain identical electrical specifications and package type (20-TSSOP), differing only in manufacturer or packaging format (tube vs. tape & reel).

Similar Substitutes meet all electrical requirements but use a different package variant (20-SSOP vs. 20-TSSOP), requiring PCB layout verification for mechanical compatibility.

Parametric Equivalents satisfy all functional requirements with superior or equivalent performance characteristics but may have different base product numbers within the same logic family.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Identical Package): MC74ACT373DTR2G and SN74ACT373PWR are the primary candidates, both maintaining the 20-TSSOP package footprint with active product status and ROHS3 compliance. MC74ACT373DTR2G offers higher inventory availability (3417 pcs) from onsemi, while SN74ACT373PWR provides Texas Instruments sourcing with equivalent stock levels (3300 pcs). Both support propagation delays within acceptable tolerance (8.5ns vs. 8ns specification).

For Package-Variant Applications: SN74ACT373DBR provides an active, ROHS3-compliant alternative using the 20-SSOP package (0.209", 5.30mm width). This substitution requires verification that PCB layout accommodates the wider package footprint and pin spacing.

For Performance-Enhanced Applications: SN74ACT563PWR delivers superior propagation delay performance (6.5ns) while maintaining identical electrical characteristics, supply voltage range, output current capability, and operating temperature specifications. This part operates as a parametric equivalent with faster switching characteristics, suitable for timing-critical applications.

Compliance Considerations: All recommended substitutes maintain REACH Unaffected status and EAR99 ECCN classification consistent with the original part. ROHS3 compliance is confirmed for all active alternatives, supporting modern manufacturing and environmental requirements.

Frequently Asked Questions (FAQ)

Q: Can MC74ACT373DTR2G directly replace 74ACT373MTCX without PCB modifications? A: Yes. Both parts use the 20-TSSOP package with identical pin configuration, electrical specifications, and operating parameters. The 0.5ns increase in propagation delay (8.5ns vs. 8ns) falls within typical design margins for 74ACT logic applications.

Q: What is the difference between SN74ACT373PW and SN74ACT373PWR? A: Both are Texas Instruments 74ACT373 parts with identical electrical specifications and 20-TSSOP packaging. SN74ACT373PW uses tube packaging format, while SN74ACT373PWR uses tape & reel format. Selection depends on assembly process requirements and inventory management preferences.

Q: Is SN74ACT373DBR compatible with designs using 74ACT373MTCX? A: SN74ACT373DBR maintains all electrical specifications and tri-state output characteristics but uses a 20-SSOP package (5.30mm width) instead of 20-TSSOP (4.40mm width). PCB layout verification is required to confirm mechanical compatibility with the wider package footprint and modified pin spacing.

Q: Why is SN74ACT563PWR listed as a parametric equivalent rather than a direct substitute? A: SN74ACT563PWR uses a different base product number (74ACT563 vs. 74ACT373), indicating a different logic function family member. While it maintains identical electrical parameters, supply voltage, output current, and operating temperature specifications, the functional circuit differs. Selection requires confirmation that the 74ACT563 logic function meets application requirements.

Q: Are all substitute parts ROHS3 compliant? A: All active and recently discontinued alternatives (MC74ACT373DTR2G, SN74ACT373PW, SN74ACT373PWR, SN74ACT373DBR, SN74ACT563PWR) are ROHS3 compliant. The original 74ACT373MTCX does not specify RoHS status due to its obsolete classification.

Q: What inventory considerations apply to these substitutes? A: SN74ACT563PWR offers the highest current availability (6178 pcs), followed by MC74ACT373DTR2G (3417 pcs) and SN74ACT373PWR (3300 pcs). SN74ACT373PW and SN74ACT373DBR provide moderate inventory levels (1531 pcs and 3100 pcs respectively). The original 74ACT373MTCX maintains 756 pcs in stock.