IC-Mart Your Trusted Source for LIN Transceivers Chips

(from leading manufacturers)

Global Manufacturers & Product Portfolios

1. Texas Instruments (TI)

TI offers a comprehensive portfolio dominated by the TLIN (next-gen high noise immunity) and SN65 (classic) series. They support 12V passenger cars, 24V commercial vehicles, and 48V mild-hybrid systems.

Architecture	Typical Models	Key Technical Features
Standard / Basic (Single Channel)	TLIN1029-Q1 / TLIN1029A-Q1 TLIN1027-Q1 TLIN1039-Q1 SN65HVDA100-Q1	Industry-standard 8-pin footprint. Features TXD dominant timeout protection. TLIN1039 offers an ultra-small SOT-23 micro-package.
Fault-Protected / High Voltage	TLIN2021A-Q1 TLIN2029-Q1 / TLIN2029A-Q1 TLIN4029A-Q1	Outstanding DC fault protection ($\pm45\text{V}$, $\pm60\text{V}$, or $\pm70\text{V}$). Fully compatible with 24V commercial trucks and 48V mild-hybrid (MHEV) environments.
Integrated Regulator (Mini SBC)	TLIN10283-Q1 TLIN10285-Q1 TLIN1431-Q1	2-in-1 integration. The built-in 3.3V or 5V LDO powers the MCU directly. TLIN1431 adds a hardware watchdog and a secure Limp Home mode.
Multi-Channel	TLIN1022A-Q1 (Dual) TLIN2022A-Q1 (High-Voltage Dual) TLIN1024A-Q1 / TLIN2024A-Q1 (Quad)	Maximizes PCB real estate. Combines 2 or 4 physical layers on a single chip. Tailored for central master nodes like Body Control Modules (BCM).

2. NXP Semiconductors

NXP is an in-vehicle networking (IVN) pioneer. Its TJA and smart SJA lines serve as the reference standards most frequently targeted for pin-to-pin replacement across the industry.

Architecture	Typical Models	Key Technical Features
Standard / Basic (Single Channel)	TJA1020 (Legacy) TJA1021 (Industry Benchmark) TJA1027 / TJA1029 TJA1421 (Next-Gen) MC33662	Ultra-low electromagnetic emission (EME) and high immunity (EMI). TJA1421 supports a 1.8V $V_{IO}$ logic interface. MC33662 enables fast 100kbps flash programming.
Integrated Regulator (Mini SBC)	TJA1028 TJA1128	Classic LIN + LDO combination. The functional safety-rated TJA1128 features an integrated watchdog and a configurable fail-safe pin.
Multi-Channel Physical Layer	TJA1022 (Dual) TJA1024 / TJA1024HG (Quad)	Integrates multiple physical channels while maintaining exceptional electrical isolation to eliminate crosstalk.
Smart Protocol Controller	SJA1124 / TJA1124	Smart quad-channel transceiver with an on-chip LIN protocol controller. The MCU manages 4 distinct LIN lines via a single SPI interface, freeing up valuable UART hardware ports.

3. Microchip Technology

Microchip focuses on highly integrated System-in-Package (SiP) solutions alongside standalone physical layers, utilizing the MCP and ATA prefixes.

Architecture	Typical Models	Key Technical Features
Standard / Basic (Single Channel)	MCP2003A MCP2004A	High cost-efficiency with minimal peripheral component requirements. Ideal for price-sensitive edge nodes.
Integrated Regulator (Mini SBC)	ATA663231 ATA663254 ATA6634	Unified family footprint design. Allows designers to swap or upgrade LDO current outputs within the same layout.
System-in-Package (LIN SiP)	ATA6617C and other SiP series	Microchip’s signature offering. Packs an AVR/PIC/ARM microcontroller, LIN transceiver, LDO, and watchdog into a single package to build a “single-chip node.”

4. Other Mainstream Manufacturers

• Analog Devices (ADI / Maxim Integrated): Offers the high fault-protection MAX13020 / MAX13021 series, featuring $\pm60\text{V}$ overvoltage tolerance. This makes it highly reliable in exceptionally noisy transient environments.
• Infineon Technologies: Delivers the TLE8457LE / TLE8457DSJ Mini SBC lines. These are highly optimized for microamp-level current consumption during system standby.
• ROHM Semiconductor: Produces the AEC-Q100 certified BD41033FJ-C, balancing low EMI emissions with excellent EMS noise immunity.
• STMicroelectronics: Supplies unique multi-functional dual-channel drivers like the STLD1 / STLD1TR for specialized chassis and power-line communication architectures.

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Chinese Domestic Manufacturers & Model Portfolios

Chinese semiconductor companies have established robust automotive-grade (AEC-Q100) supply chains, producing reliable pin-to-pin alternatives to global tier-1 brands.

1. SitCore (Hunan SitCore Electronics / OmniVision Group)

• Background: An early domestic pioneer in CAN/LIN solutions, now operating under the OmniVision umbrella.
• Portfolio: SIT1021 / SIT1021GQ (Basic PHY, cross NXP TJA1021 / TI TLIN1029), SIT1022QT (Dual channel), and SIT1028 / SIT1028QT (Mini SBC with integrated 5V/3.3V LDO).

2. Chipanalog (Shanghai Chipanalog Microelectronics)

• Background: Specializes in high-performance analog and mixed-signal chips, offering a complete lineup from single-channel to quad-channel master devices.
• Portfolio: CA-IF1021-Q1 / CA-IF1021S-Q1 (Provides up to $\pm58\text{V}$ fault protection, ISO7637 compliant), CA-IF1028-Q1 (Mini SBC), and CA-IF1024F-Q1 (Quad-channel master transceiver with wake-up features).

3. 3PEAK (3PEAK Incorporated)

• Background: A prominent listed analog IC vendor focusing on fully independent domestic supply chains.
• Portfolio: TPT1621Q (High-voltage fault protection). Tailored for 48V mild-hybrid vehicles, it uses a proprietary electromagnetic symmetry tuning patent to enhance EMI performance.

4. Novosense (Suzhou Novosense Microelectronics)

• Background: A major provider of automotive-grade analog, isolation, and sensor ICs with massive deployment in EV powertrains and domain controllers.
• Portfolio: NCA1021 (Standard single-channel PHY, AEC-Q100 Grade 1, microamp-level sleep currents). Widely applied in mirrors, window controls, and seat modules.

5. AutoChips (A NavInfo Company)

• Background: A leading automotive MCU manufacturer that focuses heavily on SiP/SoC integration rather than standalone transceivers.
• Portfolio: AC7801L / AC7811 series. These are automotive MCUs with an integrated LIN-PHY and high-voltage LDO. They form a complete closed-loop node on a single chip, eliminating the need for standalone transceivers in minor body modules.

Summary Selection Table (Chinese Domestic Components)

Manufacturer	Typical Models	Main Product Category	Key Features / International Cross
SitCore	SIT1021 / SIT1021GQ SIT1028QT	Standard Single-Channel PHY Integrated High-Voltage LDO (SBC)	Earliest domestic commercialization. Fully compatible with NXP TJA1021 / TJA1028.
Chipanalog	CA-IF1021-Q1 CA-IF1028-Q1 CA-IF1024F-Q1	Basic High-Voltage Type Integrated Regulator Type Automotive Quad-Channel Master	Delivers $\pm58\text{V}$ DC bus fault protection. The quad-channel model replaces NXP TJA1024 to simplify BCM routing layouts.
3PEAK	TPT1621Q	High DC Voltage / Fault-Protected	Engineered specifically for 48V mild-hybrid architectures. Features proprietary electromagnetic symmetry tuning tech.
Novosense	NCA1021	Standard Slave Node PHY	Classic single-channel transceiver. Targets ultra-low electromagnetic emission (EME) and high lot-to-lot consistency.
AutoChips	AC7801L / AC7811	Highly Integrated MCU+LIN PHY SoC	High SiP integration. Merges the MCU, LDO, and LIN PHY to enable single-chip edge nodes.

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LIN Transceivers Typical Application Scenarios

LIN networks are positioned as a low-cost, single-wire complement to CAN/CAN-FD buses. Operating at a maximum speed of 20kbps in a Master/Slave topology, LIN transceivers are standard choices for low-bandwidth, cost-sensitive edge components:

1. Body & Comfort Systems

This is the largest volume segment for LIN devices. Sub-networks link localized actuators back to the central Body Control Module (BCM).

• Doors: Power window lifters, electronic door locks, anti-pinch processing, and mirror adjustments (angle, folding, heating).
• Seats: Multi-way motor adjustments, heating/ventilation airflow control, and position memory.
• Roof: Sunroof controllers, motorized sunshades, and overhead console switches.

2. Human-Machine Interface (HMI) & Switch Panels

To avoid routing thick wire bundles through tight spaces, switch clusters are daisy-chained via tiny LIN nodes.

• Steering Wheel: Controls for audio volume, cruise control, and voice assistants.
• Center Console: HVAC climate control knobs, fan speed adjustments, and defroster buttons.
• Stalks: Turn signal indicators, headlight switches, and wiper speed controls.

3. Smart Sensors & Micro-Actuators

• HVAC Flaps: Micro-stepper motors that direct airflow dampers and air recirculation flaps.
• Sensors: Rain sensors, automatic headlight ambient light sensors, and cabin air quality monitors.
• Aero Controls: Active Grille Shutters (AGS) that open or close based on engine cooling demands.

4. Interior Lighting

• RGB Ambient Lighting: Modern multi-color cabin lighting utilizes hundreds of LEDs. Each color-changing cluster typically integrates a mini MCU or dedicated driver alongside a LIN transceiver to execute color and brightness scripts sent by the BCM.

Four Core Functions of LIN Transceivers

• Bidirectional Level Shifting: During transmission, it converts low-voltage MCU UART (TXD) logic signals into high-voltage LIN bus signals. During reception, it translates high-voltage single-wire LIN bus signals back to low-voltage (RXD) logic signals for the MCU.
• EMC/EMI Control: Built-in wave-shaping circuitry closely manages the rise and fall slopes (slew rate) of the signal. This maintains a steady 20kbps data rate while minimizing electromagnetic radiation, preventing interference with sensitive car electronics like radios.
• Low-Power Management: Supports ultra-low-power Sleep and Standby modes. When the vehicle ignition is turned off, the chip drops into a microamp-level ($\mu\text{A}$) state. It wakes up instantly upon detecting bus traffic or a local switch trigger.
• Fail-Safe Protection: Automotive power networks are highly unpredictable. LIN transceivers integrate high-voltage ESD protection, short-circuit protection (to battery or ground), thermal shutdown, and TXD dominant timeout protection. The timeout mechanism stops a frozen MCU from permanently pulling the bus down and locking up the entire network.