Interface ICs
Products (4)
MAX22028AWA+ - 3.5kVRMS Isolated RS-485/RS-422 Transceiver | Analog Devices
The Analog Devices (formerly Maxim Integrated) MAX22028AWA+ is a fully integrated, 3.5 kVRMS digitally isolated half-duplex RS-485/RS-422 transceiver housed in a compact 8-pin wide-body SOIC package with 5.5 mm of creepage. It combines a UART-side interface, an isolated cable-side driver/receiver, and on-chip galvanic isolation in a single IC, eliminating the need for a separate digital isolator plus discrete transceiver. The device supports data rates up to 16 Mbps and operates over the -40C to +85C industrial temperature range. What is an isolated RS-485 transceiver? An RS-485/RS-422 transceiver is a differential line driver/receiver used for robust, long-distance serial communication in noisy industrial environments. Galvanic isolation adds a high-voltage barrier (typically several kVRMS) between the UART/microcontroller side and the bus side, breaking ground loops, protecting low-voltage logic from surge events, and allowing large common-mode voltages between nodes. Isolated transceivers sit at the intersection of interface ICs and power management, and are essential building blocks in industrial fieldbus, motor control, and renewable energy systems. The MAX22028AWA+ integrates the transformer driver, low-dropout LDO, and isolation barrier on-chip, so only a single 3.3 V supply on the UART side is needed - the cable-side power is generated internally. Maxim's AutoDirection feature eliminates the external DE/RE pin control by sensing the driver input and switching direction automatically, which simplifies firmware and reduces GPIO usage on the host MCU. Integrated protection includes +/-25 V bus fault tolerance on the RS-485 pins, hot-swap capability on the cable side, and 5.5 mm creepage for reinforced insulation per IEC 60747-17 (VDE 0884-17). Typical applications include isolated RS-485 nodes in industrial PLCs, solar inverter monitoring, building-automation RS-485 trunks, isolated sensor interfaces, and HVAC controllers. The wide-body SOIC-8 footprint makes the part a drop-in replacement for designs previously built with a small isolated DC-DC plus an external transceiver + digital isolator stack. When designing with the MAX22028AWA+, place 100 nF X7R bypass capacitors on both VDD pins within 2 mm of the package and observe the 5.5 mm clearance requirement for end-to-end primary/secondary PCB copper. This page synthesizes distributor pricing, same-family alternatives (MAX22025-MAX22028), and design notes beyond the manufacturer datasheet.
MC33689DWBR2 - SPI System Basis Chip with LIN Transceiver | NXP
The NXP MC33689DWBR2 is a SPI-controlled System Basis Chip (SBC) integrating a 5V/60mA linear regulator, a Local Interconnect Network (LIN) transceiver, a watchdog timer, a SPI interface for MCU communication, and multiple high-side/low-side drivers in a 32-SOIC wide-body package. It targets automotive 12V body and chassis applications including power window, mirror, seat, and sunroof control modules. What is a System Basis Chip (SBC)? An SBC is an automotive-grade mixed-signal IC that consolidates the housekeeping functions normally handled by discrete power, communication, and monitoring components. It sits between the 12V automotive battery, the microcontroller, and the LIN bus, providing a regulated MCU supply, watchdog supervision, fail-safe output drivers, and physical-layer connectivity in a single package. Hierarchically, the MC33689 belongs to the power management IC family > analog/mixed-signal IC > system basis chip > SBC with LIN. Key features of the MC33689DWBR2 include a wide 5.5V to 18V supply range (with 27V load-dump transient tolerance), an integrated SPI interface for diagnostic and configuration access, dedicated LIN 2.0/2.1/SAE J2602 physical layer compliant transceiver, configurable watchdog window, and reset generation with selectable timing. The wide-body 32-SOIC package provides generous creepage distance and is suitable for automotive PCB assemblies using through-hole or SOIC sockets. The device is built on NXP's SMARTMOS BCD process technology, integrating analog and digital circuitry on a single die for reliability under harsh automotive environments. Built-in protection includes thermal shutdown, load-dump transient survival, short-circuit limiting on regulated outputs, and reverse-battery protection via external resistor. Typical applications include automotive mirror control, power window modules, seat position controllers, sunroof control units, and other body-electronics LIN slave nodes communicating with body control modules. It is particularly attractive for cost-sensitive LIN slave ECUs where PCB area is constrained. When designing with this device, verify that the LIN master implements proper bus timeout and that the SBC's watchdog timing matches the MCU's firmware timeout window. Decouple the 12V input (VSUP) with a 100nF ceramic close to the pin and reserve board area for load-dump filtering. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, enabling faster procurement and second-source decisions for automotive LIN SBC designs.
TLIN1124A-Q1 - Automotive Quad LIN Transceiver | Texas Instruments
The Texas Instruments TLIN1124A-Q1 is an automotive-grade quad Local Interconnect Network (LIN) physical layer transceiver with integrated commander pull-up resistors, inhibit, wake-up and protection features, supplied in a 24-pin VQFN (RGY) package. It supports a wide operating voltage range of 5V to 28V with extended LIN bus fault protection to ±40V, and converts TXDx protocol streams into optimized LIN bus signals via a current-limited wave-shaping driver that minimizes electromagnetic emissions (EME). A LIN transceiver is a physical-layer device that connects a microcontroller's logic-level UART/SPI pins to the single-wire LIN bus used in distributed automotive body and chassis networks. LIN transceivers sit between the protocol controller and the bus cable, handling dominant/recessive bit arbitration, slew-rate control, bus fault tolerance, and remote wake-up. Compared to CAN, LIN targets low-cost sub-buses for non-safety-critical nodes like mirror adjusters, seat modules, ambient lighting, and rain/light sensors, and is standardized by ISO 17987-4 and SAE J2602-1. Key features include compliance with LIN 2.0, LIN 2.1, LIN 2.2, LIN 2.2A, ISO/DIS 17987-4, and SAE J2602-1; receiver capability for high-speed downloads up to 100 kbps (above the LIN spec ceiling) useful for end-of-line firmware programming; integrated commander and responder termination; thermal shutdown; bus dominant time-out; and an INH pin for managing an external voltage regulator during low-power standby. The wide 5V-28V battery range makes the part suitable for 12V automotive supply rails and 24V commercial-vehicle systems. Architecturally, each of the four LIN channels uses a slope-controlled open-drain driver and a wide-common-mode receiver, with separate TXD/RXD logic interfaces per channel. The commander pull-up (typically a diode + resistor ladder) is internal, eliminating external components on the master node. The part is qualified to AEC-Q100 Grade 1, supporting -40°C to +125°C operation, and integrates ±8 kV HBM ESD protection on the LIN bus pins. Typical applications include body control modules, HVAC control units, seat control modules, door/window liftgate modules, steering column switches, and rear-view mirror modules in 12V automotive networks. The quad channel density allows one IC to service multiple LIN sub-buses in a single ECU footprint. When designing with this device, route the LIN bus traces as short and symmetric as possible and keep them away from high-dV/dt switching nodes. Use a 100 nF ceramic bypass capacitor close to each VCC pin and a bulk capacitor on the battery rail to ride out load-dump transients. The INH pin may be used to control an external LDO for ultra-low standby current. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving automotive hardware engineers a single reference for sourcing, second-sourcing, and layout guidance for the TLIN1124A-Q1.
TLIN2024A-Q1 - Quad LIN Transceiver w/ Wake-Up | TI
The Texas Instruments TLIN2024A-Q1 is a Quad Local Interconnect Network (LIN) physical-layer transceiver integrating wake-up, dominant-state timeout, and bus-fault protection in a 20-pin VQFN (RGY) package. It is AEC-Q100 Grade 1 qualified for automotive applications, compliant with LIN2.0, LIN2.1, LIN2.2, LIN2.2A and ISO/DIS 17987-4 electrical physical layer specifications, and compliant with SAE J2602-1 vehicle networks. A LIN (Local Interconnect Network) transceiver is a single-wire bidirectional bus driver/protector typically used for low-speed in-vehicle networks at data rates up to 20 kbps standard, sitting beneath higher-layer protocols such as CAN and Automotive Ethernet. Within the vehicle E/E architecture hierarchy, LIN complements CAN by serving cost-sensitive sub-networks of body electronics, sensors, and mechatronic actuators where bandwidth and deterministic latency requirements are modest but robustness against automotive transients is non-negotiable. Key features of the TLIN2024A-Q1 include two independent dual LIN transceiver blocks controlled by separate VSUP1 and VSUP2 rails, support for 12-V and 24-V applications, an extended operating voltage range with ±58-V LIN bus fault protection and load-dump tolerance, integrated wake-up pattern recognition on all four channels, and a receiver that supports data rates up to 100 kbps for faster in-line programming. The device uses internal LIN slave termination resistors selectable via the SLIN_EN pin, has an open-drain RXD output structure compatible with both 3.3-V and 5-V microcontroller I/O domains, and integrates thermal shutdown, under-voltage detection on VSUP, and dominant-state timeout to prevent a single stuck node from blocking the bus. Its wide input supply range and bus-fault tolerance make it suitable for the harsh electrical environment of 12-V and 24-V automotive platforms. Typical applications include body control modules, HVAC control panels, steering-wheel switch matrices, seat and door module LIN clusters, rear-view mirror controls, and lighting LIN nodes. The dual-rail architecture also enables systems where some LIN channels are always-on for wake-up while others are locally switched for quiescent-current reduction. Compared with discrete LIN implementations, the TLIN2024A-Q1 reduces BOM by integrating four physical-layer channels in a single small package. When designing with this device, place a 100 nF decoupling capacitor as close as possible to each VSUP pin, ensure adequate PCB trace width for 12-V battery feeds, and respect the LIN pin external diode and resistor guidance for commander nodes. The dominant-state timeout feature prevents bus lock-up but should be confirmed against system-level wake-up timing requirements during validation.