ATA6620-TASY LINbus Transceiver Half Duplex Equivalent & Substitute Parts

Part Overview

The ATA6620-TASY is a half-duplex LINbus transceiver manufactured by Microchip Technology, designed for Local Interconnect Network (LIN) communication in automotive and industrial applications. This part is classified as obsolete, making identification of active equivalent and substitute components essential for ongoing system support, design updates, and procurement continuity. The ATA6620-TASY operates across a wide supply voltage range of 5V to 18V with a receiver hysteresis of 30 mV, packaged in an 8-SOIC surface mount configuration.

Substiute Parts

ATA6620-TASY

Microchip TechnologyIn Stock: 906ATA6620-TASY Datasheet

Current PartRFQ

TJA1028T/3V3/20/1J

NXP USA Inc.In Stock: 1030TJA1028T/3V3/20/1J Datasheet

MFR RecommendedRFQ

TJA1028T/5V0/10,11

NXP USA Inc.In Stock: 2124TJA1028T/5V0/10,11 Datasheet

MFR RecommendedRFQ

TJA1028T/5V0/20:11

NXP USA Inc.In Stock: 107867TJA1028T/5V0/20:11 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ATA6620-TASY is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

• Protocol: LINbus half-duplex transceiver functionality
• Number of Drivers/Receivers: 1/1 configuration
• Package / Case: 8-SOIC (0.154", 3.90mm Width) surface mount
• Mounting Type: Surface Mount
• RoHS Compliance: ROHS3 Compliant

Voltage Supply Compatibility: The ATA6620-TASY operates at 5V ~ 18V. Substitute parts are grouped by their specific supply voltage ratings:

• TJA1028T/5V0/10,11 and TJA1028T/5V0/20:11 operate at 4.9V ~ 5.1V (5V nominal)
• TJA1028T/3V3/20/1J operates at 3.3V

Receiver Hysteresis: The ATA6620-TASY specifies 30 mV receiver hysteresis. All substitute parts (TJA1028 series) provide 200 mV receiver hysteresis, which represents a functional difference in noise immunity characteristics.

Operating Temperature: The ATA6620-TASY operates at -40°C ~ 125°C. Substitute parts extend the upper temperature limit to -40°C ~ 150°C, providing enhanced thermal performance.

All substitute parts are manufactured by NXP USA Inc., carry active product status, and maintain ROHS3 compliance and MSL 1 (Unlimited) ratings.

Parameter Comparison

Engineering Selection Recommendations

For 5V Supply Systems: The TJA1028T/5V0/10,11 and TJA1028T/5V0/20:11 are direct functional equivalents for applications operating at 5V nominal supply voltage. Both parts maintain the 1/1 half-duplex LINbus transceiver configuration and 8-SOIC package footprint. The TJA1028T/5V0/20:11 offers significantly higher inventory availability (107,800 pcs) compared to TJA1028T/5V0/10,11 (2,067 pcs), making it the preferred selection for new procurement. Both parts extend the operating temperature range to -40°C ~ 150°C and maintain ROHS3 compliance and MSL 1 ratings.

For 3.3V Supply Systems: The TJA1028T/3V3/20/1J is the appropriate substitute for applications requiring 3.3V supply voltage operation. This part maintains identical package, protocol, and functional configuration while providing the specified 3.3V supply voltage rating.

Voltage Supply Consideration: The ATA6620-TASY supports a wide supply range of 5V ~ 18V. Systems operating above 5.1V nominal voltage cannot use the TJA1028 series substitutes, which are rated for either 4.9V ~ 5.1V or 3.3V. For applications requiring operation above 5.1V, alternative LINbus transceiver solutions must be evaluated.

Receiver Hysteresis Difference: All TJA1028 substitutes provide 200 mV receiver hysteresis compared to the ATA6620-TASY's 30 mV specification. This represents enhanced noise immunity in the substitute parts and does not present a compatibility issue for standard LINbus applications.

Product Status and Compliance: All substitute parts carry active product status, ensuring long-term availability and manufacturing support. All parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity ratings, consistent with the original part's environmental and regulatory certifications.

Frequently Asked Questions (FAQ)

Q: Can the TJA1028T series directly replace the ATA6620-TASY in existing designs?

A: Direct replacement is possible only if the application's supply voltage requirement aligns with the substitute part's rating. For 5V systems, TJA1028T/5V0 variants are direct functional replacements. For 3.3V systems, TJA1028T/3V3/20/1J is appropriate. For systems requiring operation above 5.1V, the TJA1028 series cannot be used. The 8-SOIC package footprint is identical, enabling PCB-level compatibility without layout modifications.

Q: What is the significance of the receiver hysteresis difference between the ATA6620-TASY (30 mV) and TJA1028 (200 mV)?

A: Receiver hysteresis defines the voltage difference between rising and falling threshold levels, affecting noise immunity. The TJA1028's 200 mV hysteresis provides greater noise rejection compared to the ATA6620-TASY's 30 mV specification. This difference does not create compatibility issues for standard LINbus communication and generally improves system robustness in noisy environments.

Q: Why do the TJA1028T/5V0/10,11 and TJA1028T/5V0/20:11 have different part number suffixes?

A: The suffix designations indicate different packaging and distribution formats. TJA1028T/5V0/10,11 is supplied in Tape & Reel (TR) format, while TJA1028T/5V0/20:11 is supplied in Cut Tape (CT) & Digi-Reel® format. Both parts are electrically and functionally identical; the difference is packaging and handling method only.

Q: Is the extended operating temperature range of the TJA1028 (up to 150°C) a concern for applications designed for the ATA6620-TASY (up to 125°C)?

A: No. The extended temperature range of the TJA1028 represents an enhancement, not a limitation. Applications designed for -40°C ~ 125°C operation will function within the TJA1028's -40°C ~ 150°C range without any adverse effects.

Q: What inventory considerations should guide substitute part selection?

A: TJA1028T/5V0/20:11 offers the highest inventory availability at 107,800 pcs, providing superior supply chain security for new designs and ongoing production. TJA1028T/5V0/10,11 and TJA1028T/3V3/20/1J offer lower inventory levels (2,067 pcs and 943 pcs respectively) and should be evaluated based on specific application volume requirements.

Q: Are all substitute parts ROHS3 compliant and MSL 1 rated?

A: Yes. All TJA1028 substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity ratings, consistent with the ATA6620-TASY's environmental and regulatory certifications.