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ATA6660-TAP Equivalent & Substitute Parts
Part Overview
The ATA6660-TAP is a half-duplex CANbus transceiver IC manufactured by Microchip Technology in an 8-SOIC surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. The ATA6660-TAP operates within a 4.75V to 5.25V supply voltage range and supports operating temperatures from -40°C to 125°C, with a receiver hysteresis specification of 70 mV. Identifying compatible substitutes ensures design continuity and supply chain flexibility.
Substiute Parts
Key Parameters
| Parameter | ATA6660-TAP Specification |
|---|---|
| Manufacturer | Microchip Technology |
| Type | Transceiver |
| Protocol | CANbus |
| Number of Drivers/Receivers | 1/1 |
| Duplex Mode | Half |
| Receiver Hysteresis | 70 mV |
| Voltage Supply Range | 4.75V ~ 5.25V |
| Operating Temperature | -40°C ~ 125°C |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
| Product Status | Obsolete |
| RoHS Status | RoHS non-compliant |
Substitute Part Grouping Explanation
Substitution eligibility for the ATA6660-TAP is determined by the following critical parameters:
- Package Compatibility: All substitutes must use the 8-SOIC (0.154", 3.90mm Width) surface mount package to ensure PCB footprint compatibility.
- Protocol Compliance: All substitutes must support CANbus protocol.
- Duplex Configuration: Primary substitutes maintain half-duplex operation (1/1 driver/receiver configuration).
- Supply Voltage Range: Substitutes must operate within or encompass the 4.75V to 5.25V range.
- Operating Temperature Range: Substitutes must support the full -40°C to 125°C temperature range or a subset thereof.
- Receiver Hysteresis: The 70 mV specification is a functional characteristic; substitutes with different hysteresis values (200 mV) remain functionally compatible for standard CANbus applications.
Substitutes are grouped into two categories: Primary Substitutes (Microchip MCP2551 series with active product status and RoHS3 compliance) and Alternative Substitutes (Texas Instruments HVDA series with automotive qualification and Analog Devices MAX13052 series with full-duplex capability).
Parameter Comparison
| Part Number | Manufacturer | Product Status | Duplex | Drivers/Receivers | Receiver Hysteresis | Supply Voltage | Operating Temp | Package | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|
| ATA6660-TAP | Microchip Technology | Obsolete | Half | 1/1 | 70 mV | 4.75V ~ 5.25V | -40°C ~ 125°C | 8-SOIC | Non-compliant |
| MCP2551-E/SN | Microchip Technology | Active | Half | 1/1 | 200 mV | 4.5V ~ 5.5V | -40°C ~ 125°C | 8-SOIC | ROHS3 Compliant |
| MCP2551-I/SN | Microchip Technology | Active | Half | 1/1 | 200 mV | 4.5V ~ 5.5V | -40°C ~ 85°C | 8-SOIC | ROHS3 Compliant |
| MCP2551T-E/SN | Microchip Technology | Active | Half | 1/1 | 200 mV | 4.5V ~ 5.5V | -40°C ~ 125°C | 8-SOIC | ROHS3 Compliant |
| MCP2551T-I/SN | Microchip Technology | Active | Half | 1/1 | 200 mV | 4.5V ~ 5.5V | -40°C ~ 85°C | 8-SOIC | ROHS3 Compliant |
| HVDA551QDRQ1 | Texas Instruments | Active | Half | 1/2 | 200 mV | 4.68V ~ 5.33V | -40°C ~ 125°C | 8-SOIC | ROHS3 Compliant |
| HVDA553QDRQ1 | Texas Instruments | Active | Half | 1/2 | 200 mV | 4.68V ~ 5.33V | -40°C ~ 125°C | 8-SOIC | ROHS3 Compliant |
| MAX13052ASA+ | Analog Devices Inc./Maxim Integrated | Active | Full | 1/1 | 70 mV | 4.75V ~ 5.25V | -40°C ~ 125°C | 8-SOIC | ROHS3 Compliant |
| MAX13052ASA+T | Analog Devices Inc./Maxim Integrated | Active | Full | 1/1 | 70 mV | 4.75V ~ 5.25V | -40°C ~ 125°C | 8-SOIC | ROHS3 Compliant |
| MAX13052ESA+ | Analog Devices Inc./Maxim Integrated | Active | Full | 1/1 | 70 mV | 4.75V ~ 5.25V | -40°C ~ 85°C | 8-SOIC | ROHS3 Compliant |
| MAX13052ESA+T | Analog Devices Inc./Maxim Integrated | Active | Full | 1/1 | 70 mV | 4.75V ~ 5.25V | -40°C ~ 85°C | 8-SOIC | ROHS3 Compliant |
Engineering Selection Recommendations
Primary Substitutes (Microchip MCP2551 Series)
The MCP2551-E/SN and MCP2551T-E/SN variants are the closest functional equivalents to the ATA6660-TAP. Both maintain half-duplex CANbus operation with 1/1 driver/receiver configuration and support the full -40°C to 125°C operating temperature range. These parts are active products with ROHS3 compliance, addressing the RoHS non-compliance limitation of the obsolete ATA6660-TAP. The supply voltage range of 4.5V to 5.5V encompasses the original 4.75V to 5.25V specification. The receiver hysteresis difference (200 mV versus 70 mV) does not compromise CANbus protocol compliance. MCP2551T-E/SN is packaged in Cut Tape & Digi-Reel format with 24,254 units in stock, while MCP2551-E/SN is available in Tube packaging with 10,100 units in stock.
For applications limited to -40°C to 85°C operating temperature, MCP2551-I/SN and MCP2551T-I/SN offer equivalent functionality with higher inventory availability (68,100 and 158,355 units respectively).
Alternative Substitutes (Texas Instruments HVDA Series)
The HVDA551QDRQ1 and HVDA553QDRQ1 are automotive-grade CANbus transceivers qualified to AEC-Q100 standard. Both support the full -40°C to 125°C temperature range and maintain half-duplex operation. The supply voltage range (4.68V to 5.33V) is compatible with the original specification. These parts feature 1/2 driver/receiver configuration, providing additional receiver capability. ROHS3 compliance and active product status make these suitable for new designs requiring automotive qualification.
Full-Duplex Alternative (Analog Devices MAX13052 Series)
The MAX13052 series offers full-duplex CANbus operation with 1/1 driver/receiver configuration and 70 mV receiver hysteresis matching the original ATA6660-TAP specification. Supply voltage (4.75V to 5.25V) and operating temperature ranges align precisely with the original part. ROHS3 compliance and active product status support modern design requirements. Full-duplex capability enables simultaneous transmission and reception, suitable for applications requiring enhanced communication bandwidth. The MAX13052ASA+ and MAX13052ASA+T variants support -40°C to 125°C operation, while MAX13052ESA+ and MAX13052ESA+T are rated to -40°C to 85°C.
Frequently Asked Questions (FAQ)
Q: Can MCP2551 series parts directly replace the ATA6660-TAP without circuit modifications?
A: Yes. The MCP2551 series maintains identical package geometry (8-SOIC), CANbus protocol compliance, half-duplex operation, and 1/1 driver/receiver configuration. The supply voltage range (4.5V to 5.5V) encompasses the original 4.75V to 5.25V specification. The receiver hysteresis difference (200 mV versus 70 mV) does not require circuit changes for standard CANbus applications.
Q: What is the significance of the receiver hysteresis parameter in substitution?
A: Receiver hysteresis defines the voltage differential between logic state transitions. The ATA6660-TAP specifies 70 mV, while most MCP2551 and HVDA variants specify 200 mV. Both values comply with CANbus protocol requirements. The higher hysteresis in substitutes provides improved noise immunity in electrically noisy environments. No circuit modification is required when substituting parts with different hysteresis values.
Q: Are the HVDA551QDRQ1 and HVDA553QDRQ1 suitable for non-automotive applications?
A: Yes. These parts are automotive-qualified but function identically in non-automotive CANbus applications. The AEC-Q100 qualification indicates enhanced reliability testing and traceability. The 1/2 driver/receiver configuration provides additional receiver capability compared to the 1/1 configuration of the ATA6660-TAP, making them functionally compatible for standard half-duplex CANbus networks.
Q: What is the difference between MCP2551-E/SN and MCP2551T-E/SN?
A: Both parts are electrically identical with identical temperature ratings (-40°C to 125°C). The primary difference is packaging format: MCP2551-E/SN is supplied in Tube packaging, while MCP2551T-E/SN is supplied in Cut Tape & Digi-Reel format. Selection depends on assembly process requirements and inventory management preferences.
Q: Can MAX13052 full-duplex parts replace the half-duplex ATA6660-TAP?
A: Yes. Full-duplex transceivers are backward compatible with half-duplex applications. The MAX13052 series maintains the same package, supply voltage range (4.75V to 5.25V), operating temperature range, and receiver hysteresis (70 mV) as the original part. Full-duplex capability provides additional functionality without requiring circuit modifications. This substitution is suitable when future design upgrades to full-duplex communication are anticipated.
Q: What is the impact of RoHS3 compliance on substitution decisions?
A: The ATA6660-TAP is RoHS non-compliant, while all substitute parts listed are ROHS3 compliant. For new designs and production environments subject to RoHS regulations, ROHS3-compliant substitutes are mandatory. For legacy systems or applications without RoHS requirements, non-compliance is not a technical barrier to substitution.
Q: Are there temperature-related constraints when selecting between MCP2551 variants?
A: Yes. MCP2551-E/SN and MCP2551T-E/SN support -40°C to 125°C operation, suitable for full industrial temperature range applications. MCP2551-I/SN and MCP2551T-I/SN are rated to -40°C to 85°C, appropriate for commercial and extended commercial temperature ranges. Select the variant matching your application's thermal requirements.
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