SN74LVC373APWE4 Equivalent & Substitute Parts

Part Overview

The SN74LVC373APWE4 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 designed for bus driving and data latching applications in digital systems operating at low voltage levels (1.65V to 3.6V). The part is currently discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications. Suitable alternatives maintain the same functional logic type, circuit configuration, and electrical performance characteristics while offering active product status from alternative manufacturers.

Substiute Parts

SN74LVC373APWE4

Texas InstrumentsIn Stock: 1004SN74LVC373APWE4 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

Equivalent substitutes for the SN74LVC373APWE4 are determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

• Logic Type: D-Type Transparent Latch
• Circuit Configuration: 8:8
• Output Type: Tri-State
• Package Type: 20-TSSOP
• Mounting Type: Surface Mount
• Independent Circuits: 1

Acceptable Parameter Variations:

• Voltage Supply Range: Minimum 1.65V acceptable; maximum 3.6V or higher acceptable
• Propagation Delay: 1.5ns to 4.4ns acceptable (within logic timing specifications)
• Operating Temperature: -40°C minimum acceptable; maximum 85°C or higher acceptable
• Output Current: 24mA minimum acceptable

Substitutes are grouped into two categories based on voltage supply specifications: 74LVC series (1.65V ~ 3.6V) and 74LCX series (2V ~ 3.6V). Both series maintain identical functional characteristics and package specifications.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute (Highest Compatibility): SN74LVC373APW (Texas Instruments) is the direct equivalent, maintaining identical electrical specifications, voltage supply range, propagation delay, and operating temperature range. This part is manufactured by the original supplier and carries active product status with 3702 units in stock.

Secondary Substitutes (74LVC Series - Extended Temperature Range): 74LVC373AT20-13 (Diodes Incorporated) provides extended operating temperature range (-40°C to 125°C) with slightly increased propagation delay (4.4ns). This part is suitable for applications requiring wider temperature operation. RoHS3 compliance and MSL-3 rating are maintained.

Alternative Substitutes (74LCX Series - Minimum Voltage 2V): MC74LCX373DTG and MC74LCX373DTR2G (onsemi) and 74LCX373MTC (Fairchild Semiconductor) are functionally equivalent with identical propagation delay and output current specifications. These parts operate at minimum voltage of 2V (versus 1.65V for 74LVC series). Selection depends on system voltage requirements. All three maintain ROHS3 compliance and MSL-1 rating.

Compliance Considerations: All recommended substitutes maintain ROHS3 compliance and REACH unaffected status. Moisture sensitivity levels range from MSL-1 (unlimited) to MSL-3 (168 hours), affecting storage and handling requirements.

Frequently Asked Questions (FAQ)

Q: Can I use 74LCX373MTC as a direct replacement for SN74LVC373APWE4? A: Yes, with one consideration. The 74LCX373MTC operates at a minimum supply voltage of 2V, while the original part operates at 1.65V minimum. If your system operates above 2V, this part is fully compatible. All other electrical and mechanical parameters are identical.

Q: What is the difference between the 74LVC and 74LCX series? A: Both series are D-Type Transparent Latch logic ICs with identical circuit configuration and output characteristics. The primary difference is the minimum supply voltage: 74LVC series operates from 1.65V, while 74LCX series operates from 2V. Select based on your system's minimum operating voltage.

Q: Why does 74LVC373AT20-13 have a longer propagation delay (4.4ns vs 1.5ns)? A: This is a specification variation from Diodes Incorporated. The extended propagation delay remains within acceptable logic timing parameters for most applications. Verify timing requirements for your specific circuit before selection.

Q: Are all substitutes available in the same packaging? A: Yes, all recommended substitutes use 20-TSSOP surface mount packaging with identical physical dimensions (0.173", 4.40mm width). Packaging variations exist only in supplier format (Tube, Bulk, or Tape & Reel), which does not affect component functionality.

Q: What is the MSL rating and why does it matter? A: Moisture Sensitivity Level (MSL) indicates how long a component can be exposed to ambient conditions before soldering. MSL-1 (unlimited) parts have no time restrictions. MSL-3 (168 hours) parts must be soldered within 168 hours of opening the package. Select based on your manufacturing and storage procedures.

Q: Can I substitute parts with different operating temperature ranges? A: Yes, if your application operates within the overlapping temperature range. The original part operates -40°C to 85°C. The 74LVC373AT20-13 extends to 125°C, making it suitable for higher temperature applications. Verify your system's actual operating temperature requirements.