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SN74AC373PWR Equivalent & Substitute Parts
Part Overview
The SN74AC373PWR 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 actively produced and widely used in digital logic applications requiring transparent latch functionality with high-speed propagation characteristics. Identifying equivalent substitute parts is essential for supply chain continuity, inventory optimization, and design flexibility across manufacturing environments.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Logic Type | D-Type Transparent Latch |
| Circuit Configuration | 8:8 |
| Output Type | Tri-State |
| Voltage Supply Range | 2V ~ 6V |
| Propagation Delay Time | 7.5ns |
| Output Current (High/Low) | 24mA / 24mA |
| Operating Temperature Range | -40°C ~ 85°C |
| Package Type | 20-TSSOP (0.173", 4.40mm Width) |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitute parts for the SN74AC373PWR are determined by strict equivalence across the following critical parameters:
- Logic Function: D-Type Transparent Latch with identical 8:8 circuit configuration
- Electrical Performance: Matching voltage supply range (2V ~ 6V), propagation delay (7.5ns), and output current specifications (24mA / 24mA)
- Package Compatibility: Identical 20-TSSOP surface mount package with matching physical dimensions
- Operating Conditions: Identical temperature range (-40°C ~ 85°C)
- Compliance Standards: ROHS3 compliance and MSL Level 1 rating
The MC74AC373DTR2G from onsemi meets all substitution criteria and is classified as a manufacturer-recommended equivalent.
Parameter Comparison
| Parameter | SN74AC373PWR (Texas Instruments) | MC74AC373DTR2G (onsemi) |
|---|---|---|
| Manufacturer Part Number | SN74AC373PWR | MC74AC373DTR2G |
| Base Product Number | 74AC373 | 74AC373 |
| Logic Type | D-Type Transparent Latch | D-Type Transparent Latch |
| Circuit Configuration | 8:8 | 8:8 |
| Output Type | Tri-State | Tri-State |
| Voltage Supply Range | 2V ~ 6V | 2V ~ 6V |
| Propagation Delay Time | 7.5ns | 7.5ns |
| Output Current (High) | 24mA | 24mA |
| Output Current (Low) | 24mA | 24mA |
| Operating Temperature Range | -40°C ~ 85°C | -40°C ~ 85°C (TA) |
| Package Type | 20-TSSOP | 20-TSSOP |
| Package Dimensions | 0.173" × 4.40mm Width | 0.173" × 4.40mm Width |
| Mounting Type | Surface Mount | Surface Mount |
| Product Status | Active | Active |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) | 1 (Unlimited) |
| REACH Status | REACH Unaffected | REACH Unaffected |
| ECCN Classification | EAR99 | EAR99 |
Engineering Selection Recommendations
Both the SN74AC373PWR and MC74AC373DTR2G are active production components with identical electrical and mechanical specifications. Selection between these parts should be based on:
Supply Chain Availability: The SN74AC373PWR (Texas Instruments) currently maintains higher inventory levels (50,200 pcs) compared to the MC74AC373DTR2G (3,969 pcs), making it the primary choice for immediate procurement requirements.
Packaging Format: The SN74AC373PWR is supplied in Cut Tape (CT) and Digi-Reel® format, while the MC74AC373DTR2G is supplied in Tape & Reel (TR) format. Packaging selection depends on production volume and assembly line requirements.
Compliance Certification: Both parts maintain identical ROHS3 compliance, REACH unaffected status, and EAR99 export classification, ensuring regulatory equivalence across all markets.
Functional Interchangeability: The identical base product number (74AC373), matching electrical performance specifications, and compatible 20-TSSOP package ensure direct functional substitution without circuit redesign.
Frequently Asked Questions (FAQ)
Q: Can the MC74AC373DTR2G be used as a direct replacement for the SN74AC373PWR?
A: Yes. Both parts share identical logic function, electrical specifications, operating temperature range, and 20-TSSOP package configuration. No circuit modifications are required for substitution.
Q: What are the key parameters that determine substitution compatibility?
A: Substitution compatibility is determined by: D-Type Transparent Latch logic type, 8:8 circuit configuration, tri-state output, 2V ~ 6V supply voltage, 7.5ns propagation delay, 24mA output current, -40°C ~ 85°C operating temperature, and 20-TSSOP surface mount package.
Q: Are there differences in packaging between these parts?
A: The SN74AC373PWR is supplied in Cut Tape (CT) and Digi-Reel® format, while the MC74AC373DTR2G is supplied in Tape & Reel (TR) format. Both use identical 20-TSSOP package dimensions and are compatible with standard surface mount assembly equipment.
Q: Do both parts meet the same compliance standards?
A: Yes. Both the SN74AC373PWR and MC74AC373DTR2G are ROHS3 compliant, REACH unaffected, classified as EAR99, and carry MSL Level 1 (Unlimited) moisture sensitivity ratings.
Q: Which part should be selected for new designs?
A: Selection should be based on supply availability and packaging requirements. The SN74AC373PWR offers higher current inventory levels, while the MC74AC373DTR2G provides an equivalent alternative when primary supply is constrained.
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