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ISL33003IUZ-T - I2C Bus Buffer, Hot-Swap, 8-MSOP | Renesas
The Renesas Electronics ISL33003IUZ-T is a two-channel I2C bus buffer with rise-time accelerators and hot-swap capability, supplied in an 8-MSOP surface-mount package for industrial -40C to +85C operation. An I2C bus buffer (also called a bus repeater or signal buffer) is an interface IC that regenerates the two-wire SDA and SCL signals of an I2C bus, extending the total bus capacitance beyond the 400 pF limit specified by the I2C specification. Within the interface IC hierarchy (bus buffer -> signal buffer/repeater -> interface IC -> semiconductor), buffers let designers add more devices, longer cables, and larger PCB traces to an I2C segment without sacrificing signal integrity or data-rate performance. Key features of the ISL33003 include capacitance extension beyond the 400 pF I2C limit, rise-time accelerator circuitry that reduces the power consumed by passive pull-up resistors while improving data-rate performance, and hot-swap circuitry that prevents corruption of the bus during card insertion or removal. The two channels allow buffering of both SDA and SCL in one compact 8-MSOP package. Technically, the buffer separates capacitive loading on either side of the device, isolating a heavily loaded segment from the controller segment. The rise-time accelerators actively pull the bus lines high during transitions, allowing weaker (higher-value, lower-power) pull-up resistors to be used without slowing edge rates. The hot-swap function keeps the I/O pins high-impedance until the local supply stabilizes, avoiding bus latch-up or data corruption during live insertion. Typical applications include backplane and card-cage systems with pluggable I2C cards, server and telecom chassis management (I2C/PMBus sensor rails), and long bus runs in industrial control where many EEPROMs, RTCs, or I/O expanders share one bus. Design consideration: place the buffer physically between the capacitive segments, and follow the datasheet recommendations for pull-up sizing and accelerator enable configuration to avoid false START conditions. This page synthesizes distributor pricing, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet alone.
ISO1042 - Isolated CAN Transceiver with 70V Fault Protection | TI
The Texas Instruments ISO1042 is a galvanically-isolated controller area network (CAN) transceiver that meets the specifications of the ISO11898-2 (2016) standard. It offers ±70V DC bus fault protection and ±30V common-mode voltage range, making it robust for industrial and automotive networking. The device supports data rates up to 5 Mbps in CAN FD mode, enabling faster payload transfer compared to classic CAN. It is available in an 8-pin SOIC (DW) package and operates over a wide temperature range. A CAN transceiver is a physical-layer device that interfaces between the CAN protocol controller and the differential bus lines. It converts the digital signals from the controller into differential signals for transmission and vice versa. The ISO1042 adds galvanic isolation, which separates the bus side from the logic side, preventing ground loops and protecting low-voltage electronics from high-voltage transients. This isolation is critical in industrial environments where long bus lines and potential ground potential differences exist. Key features include reinforced isolation with a working voltage of 1000 Vrms, a common-mode voltage range of ±30V, and bus fault protection up to ±70V. The device also features a silent mode for bus monitoring and a dominant timeout function to prevent bus lock-up. Its low loop delay of 150 ns ensures high-speed communication, and it is compliant with ISO11898-2 (2016) and ISO11898-5 standards. The ISO1042 uses TI's capacitive isolation technology, which provides high immunity to magnetic interference and supports high data rates. The isolation barrier is rated for 5000 Vrms surge, ensuring reliable operation in harsh environments. The device is designed for use in automotive and industrial applications, including electric vehicles, battery management systems, and factory automation. Typical applications include automotive body control modules, industrial fieldbus networks, and building automation. The ISO1042 is also suitable for solar inverters and motor drives where galvanic isolation is required for safety. Its robust fault protection and high common-mode range make it ideal for long bus lines in noisy environments. When designing with the ISO1042, ensure proper PCB layout with adequate creepage and clearance distances for the isolation barrier. Use a 100 nF bypass capacitor on the VCC pin and a 10 µF capacitor on the VIO pin for stable operation. The device requires a single 3.3V or 5V supply on the logic side and a 5V supply on the bus side.
ISO1042BDWVR - Isolated CAN FD Transceiver 5Mbps 70V | TI
The Texas Instruments ISO1042BDWVR is a galvanically-isolated CAN transceiver supporting flexible data rates up to 5 Mbps (CAN FD capable), with 70-V bus fault protection and a working isolation voltage of 1060 Vrms, housed in an 8-pin wide-body SOIC (DWV) package rated from -40C to +125C. A CAN transceiver is the physical-layer interface device that translates logic-level signals from a CAN controller into differential bus signals (CANH/CANL) and back. Within the system hierarchy it sits between the protocol controller and the twisted-pair bus, and isolated variants like the ISO1042 belong to the broader class of digital-isolator-based interface ICs used in industrial and automotive networks. Key features include 70-V bus fault protection (far beyond the -27V to 40V tolerance of typical transceivers), a 5 Mbps flexible data rate for CAN FD frames, and logic-side supply flexibility from 1.8V to 5.5V, allowing direct connection to low-voltage microcontrollers without level shifting. Integrated bus-pin ESD protection of +/-16 kV HBM, thermal shutdown, and dominant-timeout functions further harden the interface. Architecturally, the device integrates the TX and RX signal isolation channels across TI's capacitive isolation barrier plus the CAN bus driver/receiver in one package, eliminating a separate digital isolator in front of a standard transceiver. The low loop delay of 152 ns supports longer bus lengths and faster arbitration in CAN FD communication, and the device meets ISO11898-2 (2016) standard specifications. Typical applications include industrial automation and motor drive networks, building automation, NVIDIA Jetson-style embedded compute platforms requiring a CAN FD isolator, automotive body electronics (the ISO1042BQDWVRQ1 variant), and medical equipment needing safety isolation between controller and bus. For design, maintain creepage and clearance around the isolation barrier in PCB layout, supply the logic side at 1.8V or 5.5V as specified, and place the 120-ohm bus termination per standard CAN practice. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet. Pricing at authorized distributors starts near $0.77 as of 2026-09-01.
ISO1042BQDWVRQ1 - 5Mbps Isolated CAN FD Transceiver | TI
The Texas Instruments ISO1042BQDWVRQ1 is an AEC-Q100 qualified, galvanically-isolated CAN FD transceiver supporting data rates up to 5 Mbps, with ±70-V DC bus fault protection and a ±30-V common-mode voltage range, housed in an 8-pin wide-body SOIC (DWV) package. An isolated CAN transceiver is a signal interface IC that combines a CAN physical-layer transceiver with a digital isolator in a single package. In the system hierarchy, it sits between the host microcontroller or CAN controller (logic side) and the two-wire CAN bus (bus side), providing galvanic isolation that blocks ground loops, common-mode transients, and high-voltage faults - critical in vehicles and industrial networks where nodes span large distances and different ground domains. Key features include support for CAN FD flexible data rates up to 5 Mbps, enabling much faster payload transfer than classic CAN's 500 kbps; a logic-side supply range down to 1.8 V for direct interfacing with low-voltage MCUs; and robust protection with ±70-V DC bus fault tolerance. The device meets the ISO11898-2 (2016) standard and integrates one driver and one receiver channel with typical operating supply current of about 43 mA. The ISO1042-Q1 family uses TI capacitive isolation technology, providing a reliable galvanic barrier suited to automotive and industrial environments. The wide-body SOIC-8 (DWV) package provides substantial creepage and clearance distance across the isolation barrier, supporting basic and reinforced isolation ratings. Typical applications include electric vehicle powertrain and battery management networks, body control modules, industrial PLC and motor drive CAN buses, and building automation nodes - anywhere CAN nodes must be isolated from ground potential differences or bus faults. Design consideration: use split-termination or 120-ohm bus termination per ISO11898-2, and place 100-nF decoupling capacitors close to both VCC1 and VCC2 pins to maintain signal integrity at 5-Mbps CAN FD bit rates. This page synthesizes distributor pricing, drop-in alternatives, comparison data, and practical design notes not found in the manufacturer datasheet alone.
ISO1050DUB - Isolated CAN Transceiver 2500Vrms | TI (Tape & Reel)
The Texas Instruments ISO1050DUB is a galvanically isolated CAN transceiver that meets or exceeds the specifications of the ISO 11898-2 standard, delivering 1 Mbps half-duplex CAN communication with 2500 Vrms silicon oxide (SiO2) isolation in an 8-pin SOP (DUB) package. An isolated CAN transceiver combines a CAN protocol controller interface with galvanic isolation, allowing data transmission between nodes without a direct electrical connection. Within the signal chain hierarchy, it sits between the CAN controller and the physical twisted-pair bus, isolating the logic domain from the bus domain. Isolation prevents ground loops, common-mode noise, and voltage spikes from damaging sensitive controller electronics in industrially noisy environments. Key features include a SiO2 insulation barrier rated 2500 Vrms for the DUB package (the ISO1050DW variant reaches 5000 Vrms), failsafe outputs, low loop delay of 150 ns typical, and 50 kV/us typical transient immunity. Bus-fault protection extends to -40V on the bus pins, and the device operates from -55C to +105C. Both logic and bus sides operate from a 5V supply. Architecturally, the ISO1050 uses an on-chip capacitive SiO2 isolation barrier providing high-speed signal transfer with low power consumption. The transceiver drives CANH and CANL differentially, supports dominant/recessive bus states per ISO 11898-2, and includes thermal shutdown protection on the bus driver. Typical applications include industrial automation networks such as CANopen and DeviceNet, motor drives, building automation, battery management systems, and EV charging stations where ground potential differences exist between nodes. Design tip: use a dedicated isolated DC-DC supply for the bus side and maintain adequate creepage and clearance on the PCB around the barrier. For higher isolation (5000 Vrms), select the ISO1050DW; TI recommends the ISO1042 or ISO1044 as successors for new designs. This page synthesizes distributor pricing, drop-in alternative cross-references, and practical design notes not found in the manufacturer datasheet. Pricing as of 2026-09-01 from LCSC listing data.
ISO1050DUBR - Isolated CAN Transceiver 2500Vrms | TI
The Texas Instruments ISO1050DUBR is a galvanically isolated CAN transceiver that meets or exceeds the specifications of the ISO 11898-2 standard, delivering 1 Mbps half-duplex CAN communication with 2500 Vrms silicon oxide (SiO2) isolation in an 8-pin SOP (DUB) package. An isolated CAN transceiver combines a CAN protocol controller interface with galvanic isolation, allowing data transmission between nodes without a direct electrical connection. Within the signal chain hierarchy, it sits between the CAN controller and the physical twisted-pair bus, isolating the logic domain from the bus domain. Isolation prevents ground loops, common-mode noise, and voltage spikes from damaging sensitive controller electronics in industrially noisy environments. Key features include a SiO2 insulation barrier rated 2500 Vrms for the DUB package (the ISO1050DW variant reaches 5000 Vrms), failsafe outputs, low loop delay of 150 ns typical, and 50 kV/us typical transient immunity. Bus-fault protection extends to -40V on the bus pins, and the device operates from -55C to +105C. Both logic and bus sides operate from a 5V supply. Architecturally, the ISO1050 uses an on-chip capacitive SiO2 isolation barrier providing high-speed signal transfer with low power consumption. The transceiver drives CANH and CANL differentially, supports dominant/recessive bus states per ISO 11898-2, and includes thermal shutdown protection on the bus driver. Typical applications include industrial automation networks such as CANopen and DeviceNet, motor drives, building automation, battery management systems, and EV charging stations where ground potential differences exist between nodes. Design tip: use a dedicated isolated DC-DC supply for the bus side and maintain adequate creepage and clearance on the PCB around the barrier. For higher isolation (5000 Vrms), select the ISO1050DW; TI recommends the ISO1042 or ISO1044 as successors for new designs. This page synthesizes distributor pricing, drop-in alternative cross-references, and practical design notes not found in the manufacturer datasheet. Pricing as of 2026-09-01 from LCSC listing data.
ISO1050QDUBRQ1 - 2.5kVRMS Isolated CAN Transceiver | Texas Instruments
The Texas Instruments ISO1050QDUBRQ1 is a galvanically isolated CAN transceiver that meets the specifications of the ISO11898-2 standard, qualified to AEC-Q100 for automotive applications. The device has logic input and output buffers separated by a silicon oxide (SiO2) insulation barrier providing galvanic isolation of up to 2500 VRMS, packaged in an 8-pin SOIC (DUB, R-PDSO-G8) package. An isolated CAN transceiver is a physical-layer interface IC that translates CAN controller logic signals (TXD/RXD) into the differential CANH/CANL bus signals while blocking DC and common-mode transients across the isolation barrier. Isolation is essential in automotive and industrial systems where ground potential differences, noise, and surges exist between the logic domain and the bus domain. Within the power and interface IC hierarchy, the ISO1050 sits between the host MCU and the physical CAN twisted-pair bus. Key features include ISO11898-2 compliance, 2500 VRMS SiO2 isolation (5000 VRMS on the ISO1050DW variant), operation from 5V supplies, and an operating temperature range of -55C to +105C per the Q1 automotive qualification. The single-package integration of the isolation barrier and transceiver simplifies layout compared to discrete optocoupler-plus-transceiver solutions, reducing BOM count and improving timing skew. Technically, the SiO2-based capacitive isolation of the ISO10xx family provides robust, low-power signal transfer with far better aging characteristics and CMTI than optocoupler alternatives. The device integrates the oscillator, modulator, and differential driver/receiver, supporting reliable CAN FD-rate backward compatibility at classic CAN data rates. Typical applications include automotive body electronics and gateways, industrial field bus systems, remote sensing nodes, motor drive control networks, and building automation where isolated CAN rails are required. Used in conjunction with isolated power supplies, the device provides a fully isolated CAN node. Design consideration: keep the isolated-side VCC2 bypass capacitor (100nF ceramic) close to the pin and ensure the PCB creepage/clearance across the barrier follows the DUB package's rated working voltage.
ISO1432DW - 12Mbps Isolated Full-Duplex RS-485/RS-422 Transceiver | TI
The Texas Instruments ISO1432DW is an EMC-protected, 12-Mbps, full-duplex, 5-kVrms isolated RS-485 and RS-422 transceiver housed in a 16-pin SOIC (DW) package. The device integrates a galvanic isolation barrier with reinforced insulation rated at 5 kVrms, a 1/1 (one driver, one receiver) full-duplex channel, and TI's proprietary EMC hardening for industrial bus robustness. Operating from a 3 V to 5.5 V supply, it supports data rates up to 12 Mbps and replaces discrete opto-isolator plus transceiver solutions with a single IC. An isolated RS-485 transceiver is a galvanically-isolated differential line driver/receiver designed for TIA/EIA-485-A and TIA/EIA-422-A applications. Within a system hierarchy, it sits at the interface between a low-voltage controller (MCU, FPGA, DSP) and a long-distance, noise-prone industrial bus. The isolation barrier blocks high-voltage transients, ground-potential differences, and common-mode noise that would otherwise couple into sensitive digital or analog circuitry upstream. By eliminating external optocouplers and isolated DC/DC converters (when paired with an integrated power isolator companion), the ISO1432 simplifies BOM, reduces board area, and improves reliability versus discrete implementations. Key features include 5-kVrms reinforced isolation per UL 1577, 12 Mbps maximum signaling rate, 1/1 full-duplex topology with separate driver output (Y/Z) and receiver input (A/B) pins, integrated bus protection including IEC 61000-4-2 ESD (typically 8 kV contact / 15 kV air) and IEC 61000-4-4 electrical fast transient immunity, and a wide 3 V to 5.5 V supply range. The device operates across -40 °C to +125 °C, suiting outdoor, cabinet-mounted, and motor-drive environments. The 16-pin DW SOIC footprint provides a creepage/clearance distance consistent with reinforced insulation requirements, simplifying PCB layout for high-voltage spacing. Internally, the ISO1432 uses TI's silicon-oxide (SiO2) capacitive isolation barrier combined with an RS-485 transceiver die on each side. The high-speed differential driver delivers 1.5 V minimum output swing into a 54 Ω load per TIA/EIA-485, while the receiver offers 50 mV typical hysteresis and a 1/8-unit-load input impedance (allowing up to 256 nodes on the bus when used with other 1/8-load parts). The EMC hardening includes spread-spectrum OOK signaling across the barrier and integrated surge protection on the bus pins, eliminating the need for external TVS diodes in many applications. Typical applications include industrial programmable logic controllers (PLCs), factory automation and field-bus networks, motor-control inverter gate-driver communication, solar inverter H-bridge control interfaces, building-automation RS-485 trunks, and any microcontroller-to-bus interface requiring reinforced isolation. The wide temperature range also suits outdoor instrumentation and renewable-energy installations. When designing with the ISO1432, allocate at least 8 mm of creepage on the PCB beneath and between the SOIC package sides to preserve the 5 kVrms rating, and pair the part with a wide-Vin isolated DC/DC (such as the ISOW1044 or ISOW1412 companion families) when the bus side must remain powered during MCU brownouts. Decouple both VCC1 and VCC2 with 1 µF X7R ceramic capacitors placed within 2 mm of the supply pins to keep digital switching currents off the isolation barrier. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone manufacturer datasheet.
ISO1540D - 2.5kVrms I2C Digital Isolator | Texas Instruments
The Texas Instruments ISO1540D is a low-power, bidirectional I2C-compatible digital isolator providing galvanic isolation up to 2500Vrms. It supports data rates up to 1 Mbps from a 3V to 5.5V supply, housed in an 8-pin SOIC package (0.154in / 3.90mm width) with open-drain outputs rated 3.5mA sink current on Side 1 and 35mA on Side 2, operating from -40C to +125C. A digital isolator transfers digital signals across an isolation barrier, preventing DC and ground-loop current flow while allowing data to pass. Digital isolators are core building blocks in power management hierarchies, replacing optocouplers with higher speed, better reliability, longer life, and smaller footprint. The ISO1540D specifically addresses I2C buses, whose open-drain, bidirectional clock and data lines require specialized direction-handling logic that general-purpose digital isolators cannot provide. Key features include bidirectional SCL and SDA channels that isolate the I2C bus without external direction control, 1-MHz (fast-mode) operation, and 25kV/us common-mode transient immunity (CMTI) for robust operation in noisy power environments. The open-drain outputs integrate directly into standard I2C topologies with external pull-up resistors on both sides of the barrier. Technically, the ISO1540D uses TI capacitive isolation technology with a silicon dioxide (SiO2) barrier, delivering high isolation robustness and long-term reliability with a typical propagation delay of 67ns, preserving I2C timing margins. The wide 3V to 5.5V supply range allows 3.3V-to-5V logic domain crossing across the barrier. Typical applications include isolated I2C sensor interfaces in industrial automation, battery management systems (BMS), power supplies, motor drives, and medical monitoring equipment, where the ISO1540D separates control electronics from high-voltage or noisy power stages. Design tip: size pull-up resistors on both sides according to bus capacitance and the 1-Mbps data rate, and place 0.1uF decoupling capacitors close to both supply pins, as current pricing of roughly $2 to $4 per unit (as of 2026-08-29) makes it cost-effective to use one isolator per isolated bus segment.
ISO6442 - Quad-Channel Digital Isolator 150Mbps | Texas Instruments
The Texas Instruments ISO6442 is a robust EMC, general-purpose quad-channel digital isolator with a 2/2 channel configuration (two forward, two reverse channels), supporting data rates up to 150 Mbps and a common-mode transient immunity (CMTI) of up to 250 kV/us. It is available in a 16-pin wide-body SOIC (DWR, 5000 Vrms reinforced isolation) and a 16-pin SSOP (DBQ, 3000 Vrms basic isolation). A digital isolator is a component that transfers digital signals across a galvanic isolation barrier, blocking high voltages, isolating ground potentials, and preventing noise currents between two sides of a circuit. Within the interface-IC hierarchy, digital isolators sit between logic controllers and high-voltage or noisy domains such as motor drives, inverters, and fieldbus networks. The ISO6442 belongs to TI's ISO644x family of basic and reinforced quad-channel isolators built on a proprietary capacitive isolation architecture using an SiO2 dielectric barrier. Key features include the wide 2.25 V to 5.5 V supply range on both sides, enabling direct interfacing with 1.8 V, 2.5 V, 3.3 V, and 5 V logic; a fail-safe default output of high for the standard ISO6442 during input power or signal loss (the ISO6442F defaults low); and robust EMC performance for harsh industrial noise environments. The reinforced DWR package supports sustained working-voltage isolation requirements. Architecturally, the device modulates the input signal across the capacitive barrier and reconstructs it at the output, delivering low power, high speed, and stable propagation characteristics over temperature and supply variation. Enable pins provide tri-state output control for power management and multipoint bus applications. Typical applications include isolated SPI interfaces, industrial fieldbus communication, motor drives, power inverters, battery management systems, and on-board chargers, where 150 Mbps throughput and 250 kV/us CMTI maintain signal integrity in electrically noisy conditions. When designing, maintain adequate creepage and clearance on the PCB, place 0.1 uF bypass capacitors close to both VCC pins, and verify that propagation delay and pulse-width distortion near 150 Mbps meet the timing requirements of the receiving peripheral.
ISO6442-Q1 - 150Mbps Quad-Channel Digital Isolator | TI
The Texas Instruments ISO6442-Q1 is an automotive-grade quad-channel digital isolator providing two forward and two reverse channels, a data rate up to 150 Mbps, and a common-mode transient immunity (CMTI) of 250 kV/us. The device is qualified to AEC-Q100 for automotive use and is available in reinforced and basic isolation ratings, with the ISO6442DBQRQ1 ordering option packaged in a 16-pin SSOP (DBQ) rated 3000 Vrms. A digital isolator is an integrated circuit that transmits digital signals across a galvanic isolation barrier, blocking high voltages, ground loops, and common-mode noise while passing logic data. Within the interface-IC hierarchy, digital isolators sit between a controller and noisy or high-voltage circuitry, complementing isolated transceivers, gate drivers, and isolated ADCs in systems requiring safety and signal integrity. Key features include the 250 kV/us CMTI, which keeps outputs correct in high-dv/dt environments such as motor-drive inverter legs, and the 150 Mbps data rate supporting fast SPI and parallel logic links. Enable pins allow each direction to be tri-stated for power management. In the event of input power or signal loss, default outputs are high; the ISO6442F-Q1 variant defaults low, giving designers a choice of fail-safe behavior. The ISO6442-Q1 uses TI's proven capacitive isolation technology, delivering robust EMC performance and long-term barrier reliability. The ISO644x-Q1 family (ISO6440/6441/6442 and F variants) shares package options including the DW-16 wide SOIC, DFP-16 wide SSOP, and DBQ-16 SSOP; a Functional Safety FIT rate and pin FMA document (SFFSB42) is available. Typical applications include EV battery management systems, isolated SPI links to current and voltage monitors, motor drives and inverters, and industrial fieldbus isolation. For reliable design, keep copper under the isolation barrier clear, decouple both VCC pins closely, and select the F-suffix variant when a low default output is required for safe power-loss behavior.
ISO6763 - 6-Ch Reinforced Digital Isolator 50Mbps | Texas Instruments
The Texas Instruments ISO6763 is a general-purpose six-channel (3/3 channel direction) reinforced digital isolator supporting data rates up to 50 Mbps with 5000 Vrms galvanic isolation in a 16-pin SOIC (DW, 7.50 mm width) package. It provides robust common-mode transient immunity of 50 kV/us and supports 1.8 V, 2.5 V, 3.3 V, and 5 V logic levels on both sides of the isolation barrier. A digital isolator is an interface IC that transfers digital signals across a galvanic isolation barrier while blocking high voltages, isolating ground potentials, and preventing noise coupling. Within the signal-chain hierarchy, digital isolators belong to the interface IC family and are essential building blocks in industrial data buses, isolated power supplies, and motor-drive gate-drive isolation systems. Key features include six isolation channels in a 3/3 configuration, 50 Mbps signaling for high-speed SPI and parallel interfaces, and reinforced 5000 Vrms isolation rating for safety-critical designs. The ISO6763 belongs to the ISO676x family (ISO6760, ISO6761, ISO6762, ISO6763, datasheet SLLSFK0E, August 2021, revised February 2023), which shares silicon-on-insulator-based capacitive isolation technology with the proven ISO77xx generation. The device uses TI's latest generation of capacitive isolation architecture with on-chip transformers implemented as SiO2 capacitors, delivering robust EMC performance with high CMTI. Low propagation delay and low channel-to-channel skew make it well suited for clocked interfaces. Wide-side supply support down to 1.8 V allows direct interfacing with modern low-voltage MCUs and FPGAs without level shifting. Typical applications include RS-485 and CAN bus isolation, isolated SPI for ADCs and DACs, industrial PLC I/O modules, and motor-control signal isolation connecting MCUs to gate drivers. The automotive-grade ISO6763FQDWRQ1 variant extends usage to vehicle systems requiring AEC-Q100 qualification. When designing, place 0.1 uF bypass capacitors close to both VCC1 and VCC2 pins and route signals across the barrier with generous creepage clearance; unused inputs should be tied to a defined logic level to prevent floating-channel oscillation.
ISO7321CDR - 25Mbps 2CH 3000Vrms Digital Isolator | Texas Instruments
The Texas Instruments ISO7321CDR is a low-power, dual-channel, 1/1 digital isolator delivering 25 Mbps signaling rate, 3000 Vrms galvanic isolation (1 minute per UL, 4242 Vpk per VDE), and 25 kV/us common-mode transient immunity in an 8-pin SOIC (D) package rated from -40C to +125C. A digital isolator is an IC that transfers digital signals across a galvanic isolation barrier, blocking DC and unwanted AC currents between two ground domains while permitting data to pass. Digital isolators sit within the broader signal-isolation hierarchy (isolator -> interface IC -> semiconductor) and are essential wherever safety isolation, ground-potential differences, or noise immunity are required. Key features include integrated noise filters on the logic inputs that reject high-frequency glitches, default output high and low options for fail-safe behavior, and low power consumption: typical ICC per channel at 1 Mbps is 1.7 mA with 5V supplies for the ISO7321 variant. The device supports supply voltages from 3V to 5.5V on both sides of the barrier, enabling 3.3V-to-5V logic-level translation across the isolation gap. The ISO732x family uses silicon dioxide (SiO2) insulation barriers formed by on-chip capacitive coupling, providing robust immunity to voltage transients, EMI, and ground-potential differences. The insulation barrier withstands 3000 VRMS for one minute per UL and 4242 Vpk per VDE, supporting reinforced-isolation designs in industrial equipment. Typical applications include industrial fieldbus communication, isolated SPI and UART interfaces, motor-control feedback loops, and isolated power-supply monitoring in space-constrained designs thanks to the compact SOIC-8 footprint. The 25 Mbps rate comfortably covers standard UART, SPI, and PWM signaling. When designing with the ISO7321CDR, maintain adequate creepage and clearance on the PCB to preserve the isolation rating, and place 0.1uF decoupling capacitors close to both VCC pins.
ISO7721QDRQ1 - 100Mbps 3kVrms Dual Digital Isolator | TI
The Texas Instruments ISO7721QDRQ1 is an automotive-grade, reinforced dual-channel digital isolator in an 8-pin SOIC (D, 3.90 mm width) package. It delivers 3000 Vrms isolation per UL 1577, 100 Mbps signaling rate, and 85 kV/us common-mode transient immunity (CMTI), with both channels in the 1/1 (opposite) direction configuration. A digital isolator transfers CMOS or LVCMOS logic signals across an isolation barrier, enabling ground-potential differences between circuits while blocking high voltage and noise. Digital isolators sit within the isolation and interface IC family, which spans optocouplers, magnetic couplers, and capacitive couplers; the ISO7721-Q1 belongs to TI's capacitive SiO2 isolator portfolio. Key features include the robust double-capacitive silicon dioxide (SiO2) insulation barrier that provides reinforced isolation with high electromagnetic immunity and low emissions at low power consumption. The AEC-Q100 qualification targets automotive environments such as battery management systems (BMS), on-board chargers, and DC-DC converters. In the event of input power or signal loss, the default output is high for devices without the F suffix and low for devices with the F suffix. Architecturally, each isolation channel consists of a logic input and output buffer separated by a double capacitive silicon dioxide insulation barrier. This on-chip SiO2 barrier provides high field strength and stable isolation over lifetime, with superior CMTI (85 kV/us) and EMC performance compared to optocoupler-based solutions. Typical applications include automotive BMS cell-monitoring isolation, isolated CAN and RS-485 communication front ends, isolated gate-drive signaling in traction inverters and on-board chargers, and industrial PLC digital I/O isolation. Pairing with isolated power modules such as the UCC25800-Q1 completes a fully isolated signal and power chain. Design consideration: verify supply voltage range and default-output behavior (high vs F-suffix low) against fail-safe requirements; pricing below is as of 2026-08-29.
ISO7742FDBQR - 100Mbps 4-Ch Reinforced Digital Isolator | TI
The Texas Instruments ISO7742FDBQR is a high-speed, robust-EMC reinforced quad-channel digital isolator in a 16-pin SSOP (DBQ) package with 3.90mm body width. It provides four isolation channels in a 2-forward/2-reverse configuration, supporting data rates up to 100 Mbps and operation from supply voltages of 2.25V to 5.5V on each side, enabling seamless logic-level translation across the isolation barrier. A digital isolator is a component that transmits digital signals across a galvanic isolation barrier, protecting low-voltage circuitry and users from high voltages, ground loops, and common-mode noise. Within the interface-IC hierarchy, it sits between signal-chain ICs and hostile environments, complementing isolated power converters and isolated transceivers in industrial systems. The ISO7742FDBQR belongs to TI's ISO774x family, which uses an on-chip capacitive isolation structure with an oxide barrier, achieving reinforced isolation rated at 3000 Vrms. Key features include a common-mode transient immunity (CMTI) of 85 kV/us minimum, low power consumption, default-output (F suffix) fail-safe behavior that drives outputs low when the input side is unpowered, and a projected barrier lifetime exceeding 30 years at rated working voltage. The device is characterized from -55C to +125C, covering extended industrial and automotive-adjacent environments. Technically, the ISO7742FDBQR encodes input transitions across the capacitive barrier and decodes them on the secondary side, achieving sub-100 Mbps signaling with low propagation delay and low channel-to-channel skew without optocoupler aging effects. Its robust-EMC construction provides high immunity to surge and fast transient events typical of motor-drive and inverter environments. Typical applications include isolated SPI/UART interfaces, industrial fieldbus communication, motor drives and power inverters, and isolated ADC signal paths in renewable-energy systems. Pair it with devices such as the AMC1306M25 or ISO1042 for complete isolated measurement and communication chains. Design tip: maintain datasheet creepage and clearance on the PCB under the isolation barrier, avoid traces crossing the gap, and place 0.1uF decoupling capacitors close to both VCCI and VDD pins to preserve EMC performance.
ISO7830DW - 8000VPK Reinforced 3-Ch Digital Isolator | TI
The Texas Instruments ISO7830DW is a high-performance, triple-channel digital isolator with reinforced isolation rated at 8000-VPK (VIOWM 2000-VRMS) and 14.5-mm creepage. It comes in a 16-pin wide-body SOIC (DW) package and delivers robust galvanic isolation for industrial and automotive systems. The device supports data rates up to 100 Mbps in a 3/0 channel configuration (three forward channels, no reverse), ideal for unidirectional signal isolation. A digital isolator is a component that transfers digital signals across an isolation barrier while blocking DC and unwanted AC currents between two ground domains. Digital isolators sit within the broader hierarchy of interface ICs and optocoupler replacements, using capacitive coupling instead of LED-based optocoupling. They are essential in motor drives, power converters, and communication interfaces where galvanic isolation protects low-voltage control circuitry from high-voltage transients. Key features include a high common-mode transient immunity (CMTI) of 70-100 kV/us, low power consumption (approximately 1.5 mA per channel at 1 Mbps), and a wide supply range of 2.25 V to 5.5 V on both sides. The ISO7830 is certified by VDE, CSA, and TUV for reinforced isolation, and offers a fail-safe output (default low) when the input side is unpowered. Technically, the ISO7830 uses ON-OFF keying (OOK) modulation across an integrated high-voltage capacitive isolation barrier. This architecture provides immunity to magnetic interference, high-speed transmission, and low propagation delay (typically 10.7 ns). The device operates over the industrial temperature range of -40C to +125C and is offered in tube (DW) and tape-and-reel (DWR) options. Typical applications include isolated SPI, UART, and GPIO links in industrial automation, motor control, photovoltaic inverters, EV charging stations, and medical equipment. High CMTI and reinforced isolation ratings fit noise-heavy, high-voltage environments. Design tip: maintain datasheet creepage/clearance on the PCB, keep the area under the barrier free of traces, and decouple both VCC pins with 0.1 uF ceramics close to the pins. Pricing as of 2026-08-30; single-unit price is estimated from distributor quotes and marked for verification.
ISO7831DW - 100Mbps 3-Ch Reinforced Digital Isolator | TI
The Texas Instruments ISO7831DW is a high-performance, reinforced triple-channel digital isolator with a 2/1 channel configuration (two forward, one reverse) and signaling rates up to 100 Mbps. It comes in a 16-pin wide-body SOIC (DW) package providing 14.5 mm creepage and a VIOWM working voltage of 2000 Vrms, with 5700 VRMS isolation and 8000 VPK surge capability. A digital isolator is an integrated circuit that transmits digital signals across a galvanic isolation barrier, blocking high voltages, ground loops, and common-mode transients from reaching sensitive low-voltage circuitry. Within the interface IC hierarchy, digital isolators sit between logic-level translators and fully isolated transceivers; reinforced-class devices such as the ISO7831 represent the highest isolation category under IEC 60747-17. Key features include a common-mode transient immunity (CMTI) of 70 kV/us for reliable operation in noisy switching environments, dual 2.25 V to 5.5 V supplies compatible with low-voltage logic, and an enable pin for output tri-state control. Certifications include UL 1577, IEC 60747-17 (VDE), and CSA, supporting safety-critical end equipment. Technically, the ISO7831 uses TI's proprietary capacitive isolation technology, which outperforms optocouplers with lower power, higher speed, and longer lifetime. Propagation delay is approximately 11 ns with about 1 ns pulse-width distortion, preserving signal timing integrity across the barrier. Operating temperature spans -40C to +125C for harsh industrial conditions. Typical applications include motor-drive gate-control interfaces, isolated SPI/UART communication in industrial fieldbus systems, and power inverter control where reinforced isolation is mandated. High CMTI and low EMI also suit medical equipment requiring patient-safety isolation. Design tip: place 0.1 uF decoupling capacitors close to both VCC1 and VCC2 pins, and use the enable pin to force a defined output state during power sequencing.
ISOW6441 - 150Mbps Isolator w/ Integrated DC-DC | TI
The Texas Instruments ISOW6441 is a low-emissions, reinforced, quad-channel (3 forward / 1 reverse) digital isolator with an integrated high-efficiency DC-DC converter, delivering up to 150 Mbps data rate and up to 550 mW of isolated output power in a 16-pin wide SOIC (DW) package. It targets space-constrained isolated designs where a separate isolated power supply is impractical. A digital isolator provides galvanic isolation between two circuits while allowing digital signals to cross the isolation barrier via capacitive coupling, without a direct electrical connection. Within the isolation component hierarchy, the ISOW6441 belongs to the power-integrated digital isolator family - combining signal isolation with isolated power delivery, a subset of interface and signal isolation ICs. Key features include 150 Mbps data rate, 5000 Vrms isolation rating per UL 1577, 200 kV/us common-mode transient immunity (CMTI), and a selectable isolated output voltage of 3.3V or 5V with low 30 mV output ripple. The integrated DC-DC converter is emission-optimized to meet CISPR 32 Class-B on a 2-layer board, a best-in-class achievement per TI application note SBAA810. Technically, the ISOW6441 uses TI proprietary capacitive isolation technology for high-speed, low-power data transfer, and a push-pull converter topology with an integrated transformer for efficient, low-EMI power delivery. Default output is high on input signal loss (non-F variant); the F-suffix ISOW6441F defaults low. Operating temperature spans -40C to +125C. Typical applications include isolated SPI in industrial automation, isolated UART links, motor drive gate-driver supplies, and power-supply feedback isolation, where the integrated power eliminates a separate isolated DC-DC converter, reducing board space and BOM cost. Design tip: achieve specified CISPR 32 compliance by following the recommended datasheet PCB layout, maintaining adequate clearance/creepage for the reinforced isolation rating, and placing decoupling capacitors close to supply pins.
KSZ8001LI-TR - 10/100 PHY Transceiver, MII/RMII/SMII | Microchip
The Microchip Technology KSZ8001LI-TR is a single-chip 10BASE-T/100BASE-TX/100BASE-FX physical layer transceiver that supports MII, RMII, and SMII host interfaces, housed in a 48-pin LQFP (7x7 mm) package with industrial -40C to +85C operating range. It integrates 3.3V single-supply operation, LinkMD cable diagnostics with up to 200m cable length measurement and ±2m accuracy, and robust 130m+ cable operation, making it a versatile Ethernet PHY for embedded designs. What is an Ethernet PHY transceiver? A Physical Layer device (PHY) is the analog front-end of an Ethernet link, sitting between the digital MAC controller and the magnetic transformer/RJ-45 connector. The PHY handles line coding (MLT-3 for 100BASE-TX, Manchester for 10BASE-T), clock/data recovery, adaptive equalization, and link-pulse detection. The KSZ8001LI-TR belongs to the Fast Ethernet (100 Mbps) PHY family, which falls under Interface ICs -> Network Interface -> Ethernet Transceiver in the broader semiconductor hierarchy. Key differentiating features include LinkMD TDR-based cable diagnostics that detect open/short conditions and report cable length up to 200m with ±2m accuracy, robust operation over standard Cat-5 cables up to 130m+, HP Auto-MDIX support for automatic crossover detection, and flexible MII/RMII/SMII host bus selection that lets the same PHY connect to MACs with different pin-count constraints. The device supports both copper (100BASE-TX, 10BASE-T) and fiber (100BASE-FX) media via an external fiber transceiver. The KSZ8001LI-TR architecture uses a 3.3V analog supply plus a 1.8V digital core derived from an internal LDO, with separate VDDIO rails supporting 3.3V or 2.5V MAC interface voltages. Typical power consumption is 172 mW. The PHY connects to a MAC via parallel MII (18 pins), reduced MII (RMII, ~9 pins), or serial MII (SMII, 4 pins), configured at reset via strap pins. Auto-negotiation follows IEEE 802.3u Clause 28. Typical applications include industrial Ethernet IP cameras, factory automation PLCs, networked printers, set-top box Ethernet ports, embedded IoT gateways with wired connectivity, and any embedded system requiring a small-footprint 10/100 Ethernet PHY with diagnostic capability. The LinkMD feature is particularly valuable in managed switches and remote installations where cable fault localization reduces service calls. Design considerations include providing a 25 MHz reference clock (or 50 MHz for RMII), placing the device within 25 mm of the magnetic transformer, implementing proper 50 ohm differential routing for the MDI traces, and supplying adequate decoupling (0.1 uF plus 10 uF bulk) on each supply rail. The KSZ8001LI-TR differs from the -L variant (KSZ8001L) by offering higher-grade industrial temperature support and the -TR suffix denotes Tape and Reel packaging. This page synthesizes distributor pricing as of 2026-10-16, real drop-in alternatives sourced from cross-reference databases, and practical engineering considerations to accelerate Ethernet PHY selection beyond the bare manufacturer datasheet.
KSZ8041NL-TR - 10/100 Ethernet PHY, MII/RMII, 32-QFN | Microchip
The Microchip KSZ8041NL-TR is a single-supply 10BASE-T/100BASE-TX physical layer (PHY) transceiver that provides MII and RMII MAC interfaces, housed in a 32-pin QFN (5x5 mm) package with HP Auto-MDIX support. The device operates from a single 3.3V supply (3.135V to 3.465V), supports 10/100 Mbps data rates per IEEE 802.3 and IEEE 802.3u, and integrates the line-side magnetics interface as well as baseline wander correction to extend signaling distance. A PHY (physical layer device) is the lowest tier of the Ethernet OSI stack, sitting just above the transformer/MDI and below the MAC layer. It handles line coding (MLT-3 / 4B5B), link training, auto-negotiation, and clock recovery. Within a typical embedded Ethernet design, a PHY sits between the magnetics plus RJ45 jack and an Ethernet MAC, either inside a microcontroller or as a separate controller; engineers select a discrete PHY when the host MCU/MAC lacks 10/100 support, when isolation or industrial temperature range is required, or when a broader MAC/PHY ecosystem has been validated for a given application. Key features of the KSZ8041NL-TR include 1/1 transceiver configuration with full MII and RMII MAC-side interfaces (SMII supported on the KSZ8041RNL version), HP Auto-MDIX crossover correction that eliminates the need for crossover cables, on-chip 1.8V regulator that can optionally power the MAC, low-power energy-detect mode, and linkMD cable diagnostics for opens, shorts, and cable length estimation. The mixed-signal design reportedly reduces power consumption versus competing 100 Mbps PHYs. Architecturally, the KSZ8041NL uses a DSP-based echo canceller and adaptive equalizer to achieve robust 100BASE-TX performance over CAT-5 cable, with HP Auto-MDIX implemented in the analog front end to autonegotiate polarity and pair roles. The MAC interface supports both MII (25 MHz reference clock at 100 Mbps) and RMII (50 MHz reference clock shared between MAC and PHY), enabling pin-compatible use with a wide range of microcontrollers. Typical applications include set-top boxes and IPTV gateways, network-capable printers and MFPs, industrial Ethernet sensors and PLCs, gaming consoles, and any embedded design that needs a 10/100 Ethernet port without a built-in PHY. The QFN-32 (5x5 mm) small footprint also suits space-constrained consumer and IoT appliances. When laying out this part, give the 50 MHz RMII clock trace a short, matched-length path to both the MAC and the PHY, and follow Microchip's KSZ8041NL Hardware Design Checklist for RJ45 magnetics pairing; do not skip the center-tap capacitor network on each line-side pair. This page compiles distributor pricing, drop-in alternatives, and PCB design notes not found in the bare datasheet, helping engineers select and place the KSZ8041NL-TR quickly.
KSZ9021GQI - Gigabit Ethernet PHY, GMII/MII, 128-PQFP | Microchip
The Microchip KSZ9021GQI is a triple-speed (10Base-T/100Base-TX/1000Base-T) Gigabit Ethernet physical-layer transceiver supporting GMII and MII MAC interfaces, housed in a 128-pin PQFP (14x20 mm) package. It delivers 1 Gbps data rate over standard CAT-5 unshielded twisted-pair cable with integrated termination and on-chip LDO regulators for analog and digital supplies, and operates from a single 3.3 V supply (3.135 V to 3.465 V). What is an Ethernet PHY transceiver? A PHY is the physical-layer device in the OSI stack that connects a link-layer MAC to the analog copper or optical medium, performing line coding, echo/return-loss cancellation, adaptive equalization, and clock/data recovery. The KSZ9021GQI is a single-port Gigabit PHY that combines the PCS (physical coding sublayer) and PMA (physical medium attachment) functions plus the analog front end, exposing a parallel GMII (Gigabit Media-Independent Interface) or MII to the host MAC. It sits below the MAC in the Ethernet stack and above the magnetics/RJ-45. Key features include 10/100/1000 Mbps operation on a single port, auto-negotiation and HP Auto-MDIX for crossover-polarity independence, four RGMII timing modes, per-port LED status drivers, JTAG and MDC/MDIO management, and a Wake-on-LAN link-change interrupt. Power consumption is about 400 mW active at 1000 Mbps and well below 100 mW in Energy-Efficient Ethernet (EEE) or software power-down modes. Typical industrial-grade operating temperature spans -40 C to +85 C. Internally, the silicon uses DSP-based adaptive equalization, a 125 MHz reference clock and a 1.25 GHz serializer, supporting both 1000Base-T PAM-5 (5-level pulse amplitude modulation across four twisted pairs simultaneously) and traditional 10/100BASE-TX MLT-3. A hardware-driven auto-MDI/MDIX eliminates the need for crossover cables and reduces system BOM. Typical applications include industrial Ethernet switches and routers, factory automation controllers, IP cameras and network video recorders, network-attached storage and embedded Linux networking, and telecommunications line cards. The 128-pin PQFP footprint is widely used on older and ruggedized designs that favor a leaded package over leadless QFN. When designing with this device, follow the typical-application circuit in the datasheet: four 1 percent 49.9 ohm termination resistors to the MDI pins, a 25 MHz reference crystal or external oscillator, 0.1 uF and 10 uF decoupling on each supply pin, and magnetics rated for 1000Base-T. Keep the analog/digital/PLL supply layouts separated by ferrite beads if specified. Note this part is moving toward end-of-life - confirm lifecycle status with Microchip before committing new designs.
KSZ9031RNXIA - Gigabit Ethernet PHY Transceiver RGMII | Microchip
The Microchip Technology KSZ9031RNXIA is a fully integrated triple-speed (10Base-T/100Base-TX/1000Base-T) Gigabit Ethernet physical-layer transceiver that supports 1.8V, 2.5V, and 3.3V I/O voltages with RGMII MAC interface, housed in a 48-pin QFN (7x7 mm) package with industrial temperature grade (-40C to +85C). The device provides a complete 10/100/1000 Mbps Ethernet PHY solution for transmission and reception over standard CAT-5 unshielded twisted pair (UTP) cable. An Ethernet PHY (Physical Layer transceiver) is a critical mixed-signal IC that sits between the digital MAC (Media Access Controller) in a processor/switch and the analog copper cable. PHY transceivers handle line coding (PAM-3/PAM-5 for 1000BASE-T), echo cancellation, crosstalk mitigation, and link training; they sit below the MAC in the OSI model hierarchy: PHY -> transceiver -> network interface -> wired connectivity IC. The KSZ9031 family occupies the Gigabit Ethernet PHY category within Power-over-Ethernet-aware wired networking semiconductors. Key features include Wake-on-LAN support, LinkMD cable diagnostics for cable plant fault detection, Auto-MDI/MDIX crossover, jumbo frame support up to 9.6 KB, and an integrated 1.2V LDO regulator. The RGMII interface supports 1.5V/1.8V/2.5V/3.3V HSTL, SSTL, or LVCMOS signaling to a wide range of MACs, FPGAs, and Ethernet switches. Energy-detect power-down and EEE (Energy Efficient Ethernet) further reduce system power consumption during idle link states. The KSZ9031 uses DSP-based echo and crosstalk mitigation, on-chip termination resistors, and adaptive equalization to deliver robust 1000BASE-T performance over marginal cable plants. The device provides two LED outputs, an MDIO management interface, and requires only a single 25 MHz reference clock. Typical applications include industrial Ethernet switches, factory automation controllers, automotive infotainment/networking, IP cameras and surveillance, network printers, and any embedded system requiring 10/100/1000 Mbps copper Ethernet connectivity with RGMII host interface. The KSZ9031 is AEC-Q100 qualified for automotive use. When designing with this device, provide a clean analog supply (AVDDH 3.3V) and digital supply decoupling per the datasheet reference circuit; place the 48-pin QFN thermal/exposed pad onto a proper ground-solder land with multiple thermal vias for reliable operation. Use the MDIO/MDC pins for PHY management and configuration. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
L9616-TR - LIN Bus Transceiver | STMicroelectronics | Automotive
The L9616-TR is a LIN (Local Interconnect Network) bus transceiver manufactured by STMicroelectronics, designed for automotive and industrial serial communication networks. It operates as a physical layer interface between the LIN protocol controller and the single-wire bus, supporting data rates up to 20 kbps as per the LIN standard. The device is available in an SO-8 package, making it suitable for space-constrained PCB designs. A LIN transceiver is a specialized integrated circuit that provides the physical layer for LIN networks, which are low-cost, single-wire serial communication buses used primarily in automotive body control applications. The transceiver converts the digital signals from the microcontroller's UART into bus-level voltages and vice versa, while providing protection against bus faults, ESD, and electromagnetic interference. In the system hierarchy, the LIN transceiver sits between the microcontroller (protocol layer) and the physical bus wire, forming the lowest layer of the LIN protocol stack. Key features of the L9616-TR include a wide operating voltage range of 5V to 27V, making it compatible with automotive battery voltages, and a low quiescent current for power-saving in standby modes. The device supports both normal and standby operating modes, with a wake-up capability via the bus line. It also features thermal shutdown and short-circuit protection, ensuring robust operation in harsh automotive environments. The SO-8 package provides a compact footprint with a thermal resistance of approximately 150 C/W, suitable for moderate power dissipation. The L9616-TR is built using STMicroelectronics' high-voltage BCD (Bipolar-CMOS-DMOS) technology, which integrates robust analog and digital circuitry on a single die. This technology enables the transceiver to handle high bus voltages and transient conditions while maintaining low power consumption. The device is fully compliant with the LIN 2.x and SAE J2602 standards, ensuring interoperability with other LIN nodes. Typical applications include automotive body control modules, door modules, seat control, steering column switches, and industrial sensor networks. The L9616-TR is also used in aftermarket automotive electronics and diagnostic tools. Its wide input voltage range and robust protection features make it ideal for direct connection to the vehicle battery. When designing with the L9616-TR, ensure proper bus termination (typically 1kΩ to 10kΩ pull-up to battery) and place a 100nF bypass capacitor close to the VCC pin. The TXD and RXD pins interface directly with the microcontroller's UART, and the INH pin can be used to control an external voltage regulator for power management in sleep mode.
L9969-TR - Automotive LIN Transceiver | STMicroelectronics
The L9969-TR is an automotive-grade LIN (Local Interconnect Network) transceiver from STMicroelectronics, designed for in-vehicle networking applications. It operates as a single-wire transceiver compliant with LIN 2.x and SAE J2602 standards, providing a robust physical layer interface between the LIN protocol controller and the single-wire bus. The device is available in a compact 8-pin SOIC (SO-8) package, making it suitable for space-constrained automotive electronic control units (ECUs). A LIN transceiver is a physical layer device that connects a microcontroller's UART to a single-wire bus, enabling communication at data rates up to 20 kbps. It converts the microcontroller's logic-level signals to the bus voltage levels (typically 12V) and provides protection against short circuits, overvoltage, and ESD. In the automotive network hierarchy, the LIN transceiver sits between the LIN protocol controller (often integrated in the MCU) and the physical bus, forming the lowest-cost networking layer below CAN and FlexRay. It is essential for body control modules, smart actuators, and sensor nodes. Key features of the L9969-TR include a wide operating voltage range of 5.5V to 18V (with 40V load dump protection), a low quiescent current of 10 uA in sleep mode, and a data rate of up to 20 kbps. It supports both 3.3V and 5V microcontroller interfaces, and includes a dominant state timeout and thermal shutdown protection. The device is AEC-Q100 qualified, ensuring reliability in harsh automotive environments. The L9969-TR uses a robust BiCMOS process technology, integrating a high-voltage bus driver, a receiver with slew-rate control, and protection circuitry. Its architecture ensures low electromagnetic emission (EME) and high electromagnetic immunity (EMI), meeting stringent automotive EMC requirements. The device also features a dedicated INH (inhibit) pin for controlling an external voltage regulator, enabling efficient power management in sleep mode. Typical applications include body control modules, door modules, seat control, steering column switches, and smart actuators. The L9969-TR is also used in LIN-based sensor nodes for climate control and lighting systems. Its low quiescent current makes it ideal for battery-powered modules that must remain in sleep mode for extended periods. When designing with the L9969-TR, ensure proper bus termination (typically 1 kOhm to 5V) and place a 220 pF capacitor on the bus line for EMC filtering. The INH pin should be connected to the enable input of the voltage regulator to achieve low standby power consumption. For thermal management, the SO-8 package has a thermal resistance of 150 C/W, so adequate PCB copper area is recommended for high-temperature environments.