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AT43312A-AC USB Hub Controller Equivalent & Substitute Parts
Part Overview
The AT43312A-AC is a USB Hub Controller manufactured by Microchip Technology, designed for USB interface applications requiring 4-port hub control functionality. This component operates in the 32-LQFP (7x7) package and is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.
The obsolete status of the AT43312A-AC necessitates sourcing equivalent components that maintain functional compatibility while meeting current manufacturing and compliance standards.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | AT43312A-AC |
| Manufacturer | Microchip Technology |
| Category | Interface |
| Function | Hub Controller |
| Interface Type | USB |
| Package / Case | 32-LQFP (7x7) |
| Voltage - Supply | 4.4V ~ 5.25V |
| Current - Supply | 24mA |
| Operating Temperature | 0°C ~ 70°C |
| Product Status | Obsolete |
| RoHS Status | RoHS non-compliant |
| Moisture Sensitivity Level (MSL) | 3 (168 Hours) |
Substitute Part Grouping Explanation
Substitution of the AT43312A-AC is determined by the following critical parameters:
- Package Compatibility: 32-LQFP (7x7) form factor for direct PCB footprint compatibility
- Functional Classification: USB Hub Controller with equivalent port control capability
- Interface Standard: USB protocol support
- Operating Temperature Range: 0°C ~ 70°C minimum requirement
- Moisture Sensitivity Level: MSL 3 (168 Hours) or equivalent
The TUSB2036VFR from Texas Instruments meets these substitution criteria through identical package geometry, equivalent functional classification, and compatible operating parameters. While voltage supply ranges differ between the main part and substitute, both operate within standard USB power delivery specifications for their respective implementations.
Parameter Comparison
| Parameter | AT43312A-AC (Main Part) | TUSB2036VFR (Substitute) |
|---|---|---|
| Manufacturer | Microchip Technology | Texas Instruments |
| Function | Hub Controller | Hub Controller |
| Interface | USB | USB 2.0 |
| Package / Case | 32-LQFP (7x7) | 32-LQFP (7x7) |
| Voltage - Supply | 4.4V ~ 5.25V | 3V ~ 3.6V |
| Current - Supply | 24mA | 40mA |
| Operating Temperature | 0°C ~ 70°C | 0°C ~ 70°C |
| Product Status | Obsolete | Active |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 3 (168 Hours) | 3 (168 Hours) |
| ECCN | EAR99 | EAR99 |
| HTSUS | 8542.39.0001 | 8542.39.0001 |
Engineering Selection Recommendations
The TUSB2036VFR qualifies as a functional substitute for the AT43312A-AC based on the following engineering criteria:
Package Compatibility: Both components utilize the 32-LQFP (7x7) package, ensuring direct PCB footprint compatibility without layout modifications.
Functional Equivalence: Both devices function as USB Hub Controllers with identical operating temperature ranges (0°C ~ 70°C) and equivalent moisture sensitivity classifications (MSL 3, 168 Hours).
Product Status and Availability: The TUSB2036VFR maintains active product status with 4401 units in stock, providing reliable supply chain continuity compared to the obsolete AT43312A-AC.
Compliance Status: The TUSB2036VFR achieves ROHS3 compliance, meeting current regulatory requirements for new designs and manufacturing environments where RoHS compliance is mandated.
Supply Voltage Consideration: The TUSB2036VFR operates at 3V ~ 3.6V, which differs from the AT43312A-AC specification of 4.4V ~ 5.25V. System power architecture must accommodate this voltage requirement during substitution implementation.
Frequently Asked Questions (FAQ)
Q: Can the TUSB2036VFR directly replace the AT43312A-AC without PCB modifications?
A: Yes, the TUSB2036VFR shares the identical 32-LQFP (7x7) package footprint, enabling direct pin-compatible substitution without PCB layout changes.
Q: What is the primary reason for substituting the AT43312A-AC?
A: The AT43312A-AC is classified as obsolete. The TUSB2036VFR provides functional equivalence with active product status and current manufacturing availability.
Q: Are there voltage supply differences between these components?
A: Yes. The AT43312A-AC operates at 4.4V ~ 5.25V, while the TUSB2036VFR operates at 3V ~ 3.6V. System power supply design must be evaluated to accommodate the TUSB2036VFR voltage specification.
Q: Does the TUSB2036VFR meet current compliance standards?
A: The TUSB2036VFR is ROHS3 compliant, meeting current regulatory requirements. The AT43312A-AC is RoHS non-compliant.
Q: Are the operating temperature ranges equivalent?
A: Yes, both components operate across 0°C ~ 70°C, providing equivalent thermal performance specifications.
Q: What is the moisture sensitivity classification for both parts?
A: Both the AT43312A-AC and TUSB2036VFR are classified as MSL 3 (168 Hours), requiring identical handling and storage protocols.
Q: Is the TUSB2036VFR available in the same packaging format?
A: Yes, the TUSB2036VFR is available in Cut Tape (CT) and Digi-Reel® packaging options, with 4401 units in current stock.
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