SN74LVC373APWG4 Equivalent & Substitute Parts

Part Overview

The SN74LVC373APWG4 is a D-Type Transparent Latch logic IC manufactured by Texas Instruments, featuring an 8:8 circuit configuration with tri-state output capability. This component is classified as discontinued at DiGi Electronics, necessitating identification of active equivalent parts for ongoing design requirements and production needs. The part operates across a supply voltage range of 1.65V to 3.6V with a propagation delay of 1.5ns and is housed in a 20-TSSOP surface mount package.

Substiute Parts

SN74LVC373APWG4

Texas InstrumentsIn Stock: 1239SN74LVC373APWG4 Datasheet

Current PartRFQ

SN74LVC373APW

Texas InstrumentsIn Stock: 3712SN74LVC373APW Datasheet

MFR RecommendedRFQ

74LCX373MTC

Fairchild SemiconductorIn Stock: 136674LCX373MTC Datasheet

MFR RecommendedRFQ

74LVC373APW,118

NXP SemiconductorsIn Stock: 530674LVC373APW,118 Datasheet

MFR RecommendedRFQ

74LVC373AT20-13

Diodes IncorporatedIn Stock: 1548574LVC373AT20-13 Datasheet

MFR RecommendedRFQ

MC74LCX373DTG

onsemiIn Stock: 3836MC74LCX373DTG Datasheet

MFR RecommendedRFQ

MC74LCX373DTR2G

onsemiIn Stock: 3007MC74LCX373DTR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN74LVC373APWG4 is determined by strict alignment with the following critical parameters: logic type (D-Type Transparent Latch), circuit configuration (8:8), output type (tri-state), package type (20-TSSOP), and electrical specifications including supply voltage range, propagation delay, and output current ratings.

Substitute parts are grouped into two categories based on voltage supply compatibility:

Category A - Full Voltage Range Compatibility (1.65V ~ 3.6V): Parts meeting the complete supply voltage specification of the original component, ensuring direct substitution without circuit redesign.

Category B - Reduced Voltage Range (2V ~ 3.6V): Parts with a minimum supply voltage of 2V instead of 1.65V, requiring verification that system operating conditions do not fall below 2V.

All substitute parts maintain identical package geometry, circuit configuration, and tri-state output characteristics.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: SN74LVC373APW (Texas Instruments) is the direct equivalent, maintaining identical electrical specifications, supply voltage range, propagation delay, and operating temperature range. This part is manufactured by the original equipment supplier and carries active product status with unlimited moisture sensitivity rating.

Secondary Recommendation: 74LVC373AT20-13 (Diodes Incorporated) provides full voltage range compatibility and extended operating temperature range (-40°C to 125°C). The propagation delay specification of 4.4ns represents a deviation from the original 1.5ns; however, this remains within acceptable timing margins for most latch applications. Moisture sensitivity level MSL-3 requires controlled storage conditions (168-hour maximum exposure to 85°C/85% RH).

Alternative Consideration: MC74LCX373DTG and MC74LCX373DTR2G (onsemi) maintain identical propagation delay and operating temperature specifications but operate at a minimum supply voltage of 2V. These parts are suitable only for applications where the system supply voltage does not fall below 2V. Both carry MSL-1 rating and active product status.

Not Recommended for Direct Substitution: 74LCX373MTC (Fairchild Semiconductor) lacks complete specification data in the provided parameters, limiting engineering validation for direct substitution.

Frequently Asked Questions (FAQ)

Q: Can SN74LVC373APWG4 be replaced with 74LVC373AT20-13?

A: Yes. Both parts maintain the same supply voltage range (1.65V ~ 3.6V), circuit configuration (8:8), output type (tri-state), and package geometry (20-TSSOP). The propagation delay difference (4.4ns vs. 1.5ns) must be evaluated against system timing requirements. The extended operating temperature range of 74LVC373AT20-13 (-40°C to 125°C) provides additional thermal margin. MSL-3 rating requires verification of storage and handling conditions.

Q: What is the difference between 74LVC and 74LCX series parts?

A: The 74LVC series (Texas Instruments, NXP, Diodes) operates at 1.65V ~ 3.6V supply voltage. The 74LCX series (Fairchild, onsemi) operates at 2V ~ 3.6V minimum supply voltage. Both series maintain identical logic function, circuit configuration, and package type. Selection depends on minimum system supply voltage requirements.

Q: Are packaging differences between Tube, Bulk, and Tape & Reel significant for substitution?

A: Packaging format (Tube, Bulk, Tape & Reel) affects handling, storage, and assembly processes but does not impact electrical or mechanical compatibility. Component selection should prioritize packaging format based on production requirements and inventory management practices.

Q: Does MSL rating affect component substitution?

A: Moisture Sensitivity Level (MSL) rating determines maximum exposure time to specified humidity and temperature conditions before component use. MSL-1 (Unlimited) parts have no time restrictions. MSL-3 (168 Hours) parts require use within 168 hours of exposure to 85°C/85% RH. Substitution is valid provided storage and handling procedures comply with the MSL specification of the selected part.

Q: Can 74LCX373MTC be used as a substitute?

A: 74LCX373MTC maintains the same logic type, circuit configuration, output type, and package geometry. However, incomplete specification data in the provided parameters prevents full engineering validation. Verification of supply voltage range, propagation delay, and operating temperature against system requirements is necessary before substitution.