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L9637D013TR ISO 9141 Bus Driver | STMicroelectronics
STMicroelectronics L9637D013TR is an ISO 9141-compatible monolithic bus driver and transceiver interface IC designed for automotive K-line communication. The device operates from a 4.5 V to 36 V supply, tolerates supply transients to 40 V, and provides reverse-battery protection down to -24 V. It is packaged in an 8-pin SOIC with a 0.154 inch, 3.90 mm body width. An ISO 9141 bus driver is a physical-layer interface IC that connects a low-voltage controller to a wired vehicle bus through a logic-level K line. This interface sits between an embedded controller or diagnostic tool and the vehicle wiring, combining bus-line drive, receive, protection, and standby behavior in one device. It belongs to the broader interface-IC and automotive-transceiver hierarchy. The L9637D013TR provides a typical supply current of 2.3 mA, a defined output-off state during undervoltage or supply interruption, and high input impedance when the supply or ground is unavailable. Its output current limiting is characterized by a typical value of 60 mA. Reverse-supply protection extends to -24 V, while transient operation reaches 40 V, making the interface appropriate for electrically demanding vehicle diagnostic networks. The device is used in ISO 9141 K-line diagnostic systems, automotive diagnostic testers, ECU test equipment, vehicle interface adapters, service-bus analyzers, and embedded diagnostic controllers. Its logic input and logic output arrangement allows a microcontroller UART to control and monitor communication with a vehicle ECU over the K line. When designing the circuit, protect the K-line connection against sustained faults and electrostatic discharge, place the bus-side interface components close to the connector, and verify that the external protection network does not distort the intended bus waveform. The 8-pin SOIC footprint is straightforward to route, but the connector-side transient path and ground return deserve particular attention in automotive harnesses. This page consolidates the device function, electrical limits, package details, drop-in alternatives, application guidance, and design considerations engineers need when selecting or integrating an ISO 9141 interface. It also distinguishes the target order code from related L9637 variants so engineers can verify packaging and temperature identifiers before placing a replacement on an existing PCB.
L9638D - LIN Bus Transceiver, 20 kbaud, 26 V | STMicroelectronics
The STMicroelectronics L9638D is a single-wire LIN bus transceiver rated for data rates up to 20 kbaud, with an operating supply voltage range of 6 V to 26 V and 40 V transient withstand, supplied in an 8-pin SOIC (8SO) surface-mount package. It integrates the physical layer of the Local Interconnect Network, exposing a CMOS-compatible TXD input, an RXD output to the host microcontroller, a hardware enable input, and a single bidirectional LIN bus line. A LIN transceiver is a dedicated interface IC that connects a microcontroller's protocol handler to the physical bus wiring of a vehicle. In the hierarchy of electronics, a LIN transceiver belongs to the interface IC family, alongside CAN, RS-232 and RS-485 transceivers, and is a physical-layer building block for in-vehicle distributed power and control networks. LIN is a single-wire, low-cost, low-bitrate serial bus standardized for body electronics and comfort systems. Key features of the L9638D include conformance to the LIN specification revision 2.0, compatibility with standard ISO 9141 systems, operation down to 6 V for battery-connected 12 V systems, a very low typ. 10 microamp sleep quiescent current, wake-up through the LIN bus line, and an enable input driven directly from a microcontroller CMOS output. Technically the device is a monolithic integrated circuit that combines a bus driver and receiver with control logic for power-saving modes and external wake-up handling. Because the LIN bus is a single wire referenced to ground, the transceiver provides the dominant/ recessive level conversion, bus biasing and bus-recessive detection that the protocol handler requires, while the host microcontroller handles framing, checksums and timing. Typical applications include body control modules, door and tailgate modules, climate control units, ambient light and seat-occupancy sensor nodes, window lift controllers, and other LIN-attached automotive sub-systems where a low-cost single-wire network replaces point-to-point wiring. When designing with the L9638D, place the bus line connection and its pull-up resistor close to the device, keep the LIN trace away from switching nodes, and verify supply decoupling for the 6 V to 26 V operating range, including the 40 V transient condition present on automotive battery lines. The sleep current of 10 microamp typ. supports dark-current-sensitive parked vehicles. This page consolidates verified distributor pricing, an explicit drop-in alternative shortlist, parameter-by-parameter comparison and practical layout guidance that are not gathered together in the original manufacturer datasheet.
L9638D013TR - 20kbaud LIN Bus Transceiver | STMicroelectronics
The STMicroelectronics L9638D013TR is a monolithic single-wire LIN bus transceiver for automotive body electronics, delivering one driver and one receiver in an 8-pin SOIC package. It supports LIN transmission rates up to 20 kbaud over an operating power supply range of 6 V to 26 V, with transient tolerance to 40 V, and adds ISO 9141 compatibility for legacy systems. The device is supplied in an 8-SOIC (0.154 in / 3.90 mm width) surface-mount package. A LIN (Local Interconnect Network) transceiver is a physical-layer interface IC that sits between a microcontroller's protocol handler and the physical single-wire vehicle bus. In the hierarchy of semiconductor devices, a LIN transceiver is an automotive bus transceiver, which is a line driver and receiver, which is an interface IC, which is an integrated circuit. LIN networks use a single wire plus a shared ground return, which keeps harness weight low compared with CAN or RS-485 multi-wire buses and makes the topology ideal for doors, seats, mirrors, climate control units and body control modules. Key features of the L9638D013TR include transmission rate up to 20 kbaud, a wide 6 V to 26 V operating supply range with 40 V transient withstand, low sleep-mode quiescent current of typically 10 uA, and three independent wake-up paths: wake-up through the LIN bus, an Enable input that is CMOS compatible from a microcontroller, and an edge-driven wake-up input. Transmit and receive delays are specified at 4000 ns and 6000 ns respectively, and the wide input and output ranges support both ISO 9141 and LIN signalling. Architecturally the L9638 combines a LIN output stage with a level-shifted receiver and an integrated voltage reference, plus internal protection structures for reverse battery, load dump and ESD events on the bus line. Because the transceiver dominates the quiescent budget of a body module in sleep, the 10 uA typical sleep current is what allows long-term parking drain budgets to be met, while the CMOS-compatible enable pin lets the host MCU gate the device directly. Typical applications include LIN sub-bus nodes in automotive body control modules, seat and door modules, climate control panels, mirror actuators, ambient light and rain sensors, window lift controllers, and any ECU that must wake from a low-current sleep state and rejoin a 20 kbaud LIN network. The ISO 9141 compatibility also makes it useful in mixed legacy diagnostic architectures. When designing around this device, place the bus-line protection and pull-up network close to the LIN pin, keep the wake-up and enable traces away from the high-voltage transients on the supply pins, and verify that the host microcontroller's TX/RX levels match the CMOS-compatible Enable and wake-up input thresholds. The 40 V transient rating gives headroom on 12 V and 24 V battery systems, but the device is not a substitute for a dedicated LIN bus protection diode network on severe-load networks. This page consolidates manufacturer feature data, verified distributor availability, drop-in SO-8 alternatives from STMicroelectronics, NXP Semiconductors, Melexis and onsemi, plus practical layout and integration notes that are not presented together on a single manufacturer datasheet.
L9662TR - 8-Channel Squib Driver Interface | STMicroelectronics
The STMicroelectronics L9662TR is an octal squib driver and quad Manchester/PSI5 encoded sensor interface ASIC designed for automotive safety applications. It is intended to deploy up to 8 squibs and interface up to 4 satellites, with two satellite interfaces also available for Hall-sensor connections. The device is packaged in a 64-LQFP (10 x 10 mm) surface-mount package. An ASIC is an application-specific integrated circuit that combines multiple functions into one device. In this case, the L9662TR belongs to the interface IC category and combines squib-driver outputs with encoded sensor-interface channels. This integration reduces the number of discrete components required in a restraint or sensing subsystem while centralizing safety-related control functions. Key verified features include support for 8 squibs, support for 4 satellite interfaces, and compatibility with Manchester and PSI5 encoded sensors. The manufacturer describes the part as intended for safety applications. The verified distributor information identifies the package as 64-LQFP, also described elsewhere as LFQFP, with 64 terminals and surface-mount construction. Industrial temperature-grade information is also listed by a distributor. The L9662TR is suited to automotive airbag and safety-system architectures where squib deployment control and sensor communication must coexist in one interface ASIC. The four satellite channels can be used for satellite sensors, while two channels can alternatively support Hall sensors according to the manufacturer description. Exact electrical ratings, diagnostic coverage, timing limits, and automotive qualification details should be confirmed from the manufacturer datasheet before schematic sign-off. For a new design, begin with the L9662TR product page and datasheet, then verify the exact pin functions, supply requirements, fault-detection behavior, and recommended external components. Because this part controls safety-related actuators, it should not be selected solely from distributor category data. The manufacturer documentation and the vehicle-level safety architecture should be treated as the authoritative sources for design decisions. This page combines verified manufacturer and distributor information with explicit data gaps, practical integration guidance, and an honest assessment of drop-in replacement availability. It is intended to help engineers locate the correct documentation, understand the device's system role, and avoid assuming that a generic interface IC can replace this specialized safety ASIC.
L9663-TR - Automotive Airbag System IC | STMicroelectronics
The L9663-TR is a highly integrated automotive airbag system IC manufactured by STMicroelectronics. It is designed to meet the stringent safety and reliability requirements of modern vehicle occupant protection systems. The device integrates multiple functions essential for airbag deployment, including squib driver circuits, sensor interfaces, and diagnostic capabilities, all in a compact surface-mount package. An airbag system IC is a specialized automotive safety component that manages the deployment of airbags by controlling the firing of squib (initiator) devices. It interfaces with crash sensors, processes deployment signals, and provides diagnostic feedback to the vehicle's electronic control unit (ECU). The L9663-TR belongs to the broader category of automotive safety ICs, which are part of the vehicle's passive safety system. These ICs must operate reliably under extreme conditions, including wide temperature ranges and high vibration, and must comply with automotive quality standards such as AEC-Q100. Key features of the L9663-TR include multiple squib driver channels, each capable of delivering precise firing currents, and integrated diagnostic functions that monitor the health of the squib circuits. The device supports both low-side and high-side driving configurations, providing flexibility in system design. It also includes a SPI interface for communication with the main ECU, enabling real-time status monitoring and control. The L9663-TR is designed to operate over a wide supply voltage range, ensuring compatibility with automotive battery systems. From a technical perspective, the L9663-TR utilizes a robust BiCMOS process technology that combines high-voltage capability with low-power consumption. The device features built-in protection mechanisms, including overcurrent and overtemperature shutdown, to prevent damage during fault conditions. Its architecture is optimized for low electromagnetic interference (EMI), which is critical in automotive environments where multiple electronic systems coexist. The IC also incorporates a self-test capability that runs at power-up to verify the integrity of internal circuits, enhancing system reliability. Typical applications for the L9663-TR include driver and passenger airbag systems, side curtain airbags, and seatbelt pretensioners. In these systems, the IC ensures that airbags deploy correctly and in a timely manner during a collision, while also providing diagnostic information to the vehicle's onboard diagnostics (OBD) system. The device is also used in advanced driver assistance systems (ADAS) that require integrated safety features. When designing with the L9663-TR, it is essential to consider the thermal and electrical requirements of the squib firing circuits. Proper PCB layout, including adequate ground planes and decoupling capacitors, is critical to ensure stable operation and minimize noise. Additionally, the SPI interface must be correctly configured to enable communication with the ECU, and the device's diagnostic features should be utilized to monitor system health continuously.
L9663-TR-1 - Automotive PSI5 Transceiver | STMicroelectronics
STMicroelectronics L9663-TR-1 is an automotive Peripheral Sensor Interface 5 (PSI5) transceiver integrated circuit with SPI support, a 4.8 V to 35 V supply range, and a 32-pin TQFP package measuring 7 mm by 7 mm. It supports Mode 1 and Mode 2 PSI5 system architectures, allowing a host microcontroller to configure the interface for the selected sensor-network topology. A PSI5 transceiver is an automotive interface IC that connects a microcontroller to sensors using the PSI5 physical layer. In the broader semiconductor hierarchy, it belongs to the transceiver and interface-controller class, then to the interface IC category, and ultimately to the wider automotive analog and mixed-signal semiconductor market. Its primary function is to support communication between a vehicle's electronic control unit and peripheral sensors. The L9663-TR-1 includes an integrated frequency-locked loop, or FLL, that can track an external clock reference and provide a clock with ±1% accuracy. This feature is significant because PSI5 sensor timing and synchronous data transfer depend on a stable reference. The device also supports SPI communication for configuration and control by the host microcontroller. Its 4.8 V to 35 V operating supply range accommodates low-voltage sensor networks and higher-voltage automotive electrical environments. The manufacturer datasheet identifies two supported PSI5 communication architectures. Mode 1 and Mode 2 differ in how the transceiver communicates with the microcontroller, and the correct IC configuration must be selected for the implemented architecture. This makes software initialization and application-circuit design central to successful deployment. The integrated FLL and external clock-reference path provide synchronization benefits when the vehicle network requires an accurate common timing source. Typical applications include automotive radar and camera sensor interfaces, vehicle body and chassis electronics, engine or powertrain control modules, and other electronic control units that connect sensors through PSI5. In such systems, the L9663-TR-1 acts as the physical-layer interface between the MCU and remote sensors while handling clock tracking, serial configuration, and sensor-network communication. Designers should verify the exact operating mode, reference-clock configuration, external components, and electrical limits against the manufacturer datasheet before layout release. The 32-pin TQFP requires careful power and ground distribution, while automotive applications require attention to transient immunity, EMC behavior, and the system-level qualifications of the complete electronic control unit rather than the IC in isolation. This page consolidates verified manufacturer and distributor information, distinguishes confirmed L9663 family ordering variants, maps the device to automotive PSI5 applications, and clearly identifies specifications that still require confirmation from the official datasheet. That separation between verified data and unresolved engineering details helps designers make sourcing decisions without treating distributor metadata as a substitute for the datasheet.
L9669013TR - 1/1 Half CAN Transceiver | STMicroelectronics
The STMicroelectronics L9669013TR is a 1/1 CANbus transceiver in a 14-SOIC surface-mount package. The device supports a 4.75 V to 5.25 V supply range and is specified for an operating temperature range of -40°C to 150°C. Its half-transceiver configuration is intended for CAN communication designs requiring one CAN driver and one CAN receiver per device. The 14-SOIC package provides a compact surface-mount solution for automotive, industrial, and embedded control systems. A CAN transceiver is an interface IC that connects a digital controller or microcontroller to a CAN bus. The CAN protocol uses differential signaling to provide noise immunity and reliable communication over longer cable runs than many single-ended interfaces. A 1/1 transceiver combines one transmitter and one receiver, while the word half indicates its position within the broader family of CAN interface devices with different driver and receiver counts. The L9669013TR is identified in the product listings as an IC transceiver half 1/1 for CANbus, with a 14-SO package. The listed operating supply range is 4.75 V to 5.25 V, making the device suitable for systems using a regulated 5 V CAN interface rail. Its specified operating temperature range of -40°C to 150°C supports use across industrial temperature environments and automotive-oriented equipment. The principal design consideration is ensuring that the transceiver supply, ground, signal, and bus connections match the host controller interface. CAN bus routing should be kept controlled, with attention to termination, protection, and grounding in the wider network. Because the exact pin assignment and electrical characteristics are not reproduced in the available product snippets, use the manufacturer datasheet for final pin connections and operating details. Typical uses include CAN-based industrial control, vehicle communication modules, embedded instrumentation, and controller area network gateways. The surface-mount 14-SOIC format also allows the device to be integrated into compact control boards where a through-hole solution is not desirable.
L9678 - Automotive Airbag System IC | STMicroelectronics
The L9678 is a highly integrated automotive airbag system IC from STMicroelectronics, designed for use in vehicle safety systems. It combines a squib driver interface, a high-voltage DC-DC converter, and a serial peripheral interface (SPI) for communication with the main microcontroller. The device is housed in a 64-pin TQFP package, providing a compact solution for airbag control units. An airbag system IC is a specialized integrated circuit that manages the deployment of airbags in a vehicle. It typically includes squib drivers that provide the controlled current to ignite the airbag inflator, a power supply to generate the high voltage needed for deployment, and diagnostic features to ensure the system is ready. The L9678 fits into the broader category of automotive safety ICs, which are part of the vehicle's passive safety system, working alongside sensors and the central airbag control unit. Key features of the L9678 include a dual squib driver with programmable firing current, a built-in DC-DC converter for generating the deployment voltage, and a 16-bit SPI interface for configuration and diagnostics. The device also includes a watchdog timer and a voltage regulator for the microcontroller, enhancing system reliability. Its automotive-grade design ensures operation over a wide temperature range and compliance with stringent automotive standards. Technically, the L9678 integrates a charge pump and a boost converter to generate the high voltage required for squib firing, typically around 20-35V. The squib drivers are designed to deliver precise current profiles, with programmable rise times and peak currents, to ensure reliable airbag deployment. The SPI interface allows the microcontroller to read diagnostic status, including squib resistance and supply voltage monitoring, enabling continuous system health checks. Typical applications include driver and passenger airbag control units, side airbag modules, and seatbelt pretensioner systems. The L9678 is also used in advanced airbag systems that support multiple deployment stages. Its integration reduces the number of external components, simplifying PCB design and improving reliability. When designing with the L9678, it is critical to follow the manufacturer's layout guidelines for the high-voltage DC-DC converter and to ensure proper thermal management, as the device can dissipate significant power during squib firing. Additionally, the SPI interface must be properly configured to enable all diagnostic features for safety compliance.
L9678P-S - Airbag System Chip | STMicroelectronics
STMicroelectronics L9678P-S is an automotive system chip for user-configurable airbag and battery cut-off applications, with two PSI-5 remote-sensor interface channels, a dedicated remote-sensor regulator, and a 64-LQFP 10 x 10 mm package. An automotive airbag system basis chip is a specialized mixed-signal power-management and communication IC that combines supply generation, sensor interfacing, control logic, and safety-related monitoring. It belongs to the hierarchy of integrated circuits, interface ICs, automotive semiconductors, and power-management devices. The L9678P-S targets entry-level airbag and cut-off-battery designs where a configurable supply can balance cost and performance. Key features include a complete internal power-management system, two PSI-5 remote-sensor interface channels, a dedicated regulator for the remote sensor, and user-configurable supply behavior. The device is also identified as pin compatible with the L9678P, providing a defined migration path within STMicroelectronics' airbag system-chip family. Its 64-LQFP package provides 64 electrical contacts in a 10 x 10 mm surface-mount outline. Technically, the L9678P integrates several functions required around an automotive restraint system rather than operating as a simple sensor or standalone power switch. Its internal supply architecture can support external airbag-related circuitry, while the remote-sensor regulator supplies the PSI-5 sensor network. The two-channel PSI-5 interface allows remote sensors to share communication resources more efficiently than an equivalent discrete implementation. Typical uses include entry-level automotive airbag controllers, battery cut-off systems, remote-seat and remote-impact sensor networks, and vehicle safety subsystems requiring coordinated power and sensor communications. The L9678P-S is particularly relevant to emerging-market vehicle platforms where cost-conscious configuration is useful but functional integration remains important. Designers should verify the exact regulator outputs, voltage limits, current ratings, diagnostic coverage, timing, and external-component requirements in DS11626_REV10_JUN14 before layout release. Because this device controls safety-related automotive functions, validation should include worst-case supply conditions, sensor faults, short-circuit behavior, thermal stress, and compatibility with the vehicle-level diagnostic strategy. This page consolidates verified manufacturer and distributor information, the confirmed L9678P pin-compatible alternative, application guidance, package constraints, and explicit data gaps, providing engineering context beyond a distributor listing while avoiding unsupported electrical assumptions.
L9679B - Automotive Battery Cut-Off and Airbag IC | STMicroelectronics
STMicroelectronics L9679B is an automotive battery cut-off and airbag-system expansion interface IC packaged in an LQFP-100 (14x14x1.4 mm) package. The supplied distributor information identifies it as a specialized interface and power-management SPS ASSP, while the available datasheet indexing describes it as an automotive battery cut-off circuit and airbag system expansion IC. Its 100-pin package provides the external connections required to integrate battery monitoring, load-control, and restraint-system interface functions within a vehicle electronic control unit. An automotive battery cut-off and airbag expansion IC is a specialized interface device within the broader hierarchy of automotive interface IC, system-specific peripheral, power-management IC, and semiconductor. These devices connect battery and restraint-system circuits to a larger microcontroller or vehicle network while providing the electrical functions needed for controlled switching, monitoring, diagnostics, and expansion of airbag-system connections. Their design emphasis is integration within demanding vehicle electronics rather than general-purpose signal processing. The verified listing identifies the L9679B as an interface device from STMicroelectronics and categorizes it under power-management specialized PMIC and SPS ASSP products. It is supplied in a 100-lead LQFP package, giving the design a substantial pin count for multiple automotive circuit interfaces. The available source data does not provide verified operating-voltage, output-current, logic-threshold, diagnostic, or switching-time figures, so those technical values must be confirmed directly against the manufacturer datasheet before design release. Automotive battery management is a natural use for this device because the L9679B is specifically described as an automotive battery cut-off circuit. Its integration can reduce the number of discrete connections and interface functions otherwise required around the battery-monitoring and load-control sections of a vehicle ECU. Engineers should still evaluate the supported battery chemistry, operating range, quiescent load, and protection behavior against their exact vehicle platform before assigning the IC. The airbag-system expansion function is also explicitly identified in the available L9679E family description. In a restraint-system controller or expansion interface, the L9679B can support additional squib-driver or deployment-loop connections while remaining under the control of the vehicle's safety controller. Because deployment behavior is safety-critical, the complete manufacturer application information, fault-response requirements, and diagnostic strategy must govern the implementation. The main design consideration is verification depth. Although the LQFP-100 package and automotive interface role are established by the supplied listings, detailed pin assignment, thermal limits, electrical characteristics, and component revisions are not included in the retrieved data. Do not infer them from a similarly named L9679-family device without confirming the exact suffix and revision against the STMicroelectronics datasheet and qualification documentation. This product record combines verified distributor pricing, package identification, source links, and application-oriented engineering guidance. It also distinguishes documented facts from unavailable parameters, reducing the risk of treating generic family descriptions as guaranteed L9679B electrical limits.
L9680TR Automotive Advanced Airbag IC | STMicroelectronics
STMicroelectronics L9680TR is an automotive advanced airbag interface IC for mid- and high-end passenger-safety systems, including mature airbag markets and integrated safety systems using cut-off battery architecture. The device is supplied in a 100-lead TQFP package with an exposed pad and is listed as an SMT automotive interface component with an SPI interface. The verified product information identifies the L9680 family as a safety-system integration solution with higher power-supply current capability and an integrated active wheel-speed-sensor interface. An automotive airbag system IC is a specialized interface and safety-control device that connects sensors, communication links, and vehicle electrical systems while supporting controlled deployment functions. In the broader electronics hierarchy, the L9680 belongs to the interface-IC class, automotive electronics, and power-management-related safety systems. Its role differs from a general-purpose MCU because it is designed around the functional safety, diagnostic, and communication requirements of airbag and integrated vehicle-safety architectures. The verified information confirms the L9680's application positioning as an advanced airbag solution, its support for mature airbag markets and cut-off-battery integrated safety systems, and its family compatibility with the L9678 and L9679 devices. The family-compatible architecture can help automotive designers reuse application knowledge across related STMicroelectronics safety products, provided that the exact device variant, diagnostics, external circuitry, and safety requirements are verified before substitution. The L9680TR uses a 100-TQFP, 14 x 14 mm package according to the distributor listing, with a reel packaging format and SMT mounting style. This package provides a high pin count for power, ground, communication, sensor, and diagnostic connections, but it also demands careful PCB escape routing and adequate thermal design around the exposed pad. The manufacturer data identifies the part as an automotive product; detailed electrical ratings, operating temperature limits, supply voltages, SPI timing, internal diagnostics, and safety-certification parameters are not included in the supplied verified data. Typical applications include conventional automotive passenger airbag controllers, cut-off-battery integrated safety systems, and vehicle safety platforms that require an active wheel-speed-sensor interface. It is also relevant to mid- and high-end airbag systems where robust sensing, communications, and deployment-control integration are required. Because an airbag IC is safety-critical, system qualification should include review of the current STMicroelectronics datasheet, reference design, diagnostic requirements, external component values, and applicable automotive quality procedures. For a new design, preserve the L9680TR footprint and verify every exposed-pad connection, supply rail, ground reference, sensor input, and SPI signal against the current datasheet. Do not treat L9678P, L9679P, or L9679BATR as unconditional replacements: the verified cross-reference data establishes family compatibility and a common 100-TQFP format for some variants, but it does not provide a complete pin-to-pin and functional-equivalence matrix. This page combines verified manufacturer and distributor information, pricing placeholders where data was unavailable, family alternatives, and practical sourcing guidance for engineers evaluating the L9680TR.
L9705D - 25V Dual Contact Interface IC | STMicroelectronics
The STMicroelectronics L9705D is a bipolar monolithic double-quad contact interface circuit for monitoring four contacts connected to ground and four contacts connected to the battery, with an operating DC supply range up to 25 V and a 20-lead SO package. It includes internal contact-input clamp diodes, a chip-enable function, and tristate output capability for automotive contact-monitoring systems. A contact interface circuit is a specialized interface IC that detects the state of resistive or switch contacts and translates those conditions into logic-level information for a larger monitoring controller. In the electronic-component hierarchy, the L9705D belongs to specialized interface ICs, where it bridges mechanical or electromechanical contacts and automotive digital electronics. Its internal bipolar implementation supports direct monitoring of both ground-referenced and battery-referenced contacts. Key verified features include an operating DC supply voltage range up to 25 V, a supply overvoltage pulse capability up to 40 V, and a maximum standby quiescent current of 50 microamperes. Internal clamping diodes connect the contact inputs to the supply and ground rails, with stated pulse-current capability of +50 mA and -75 mA. The chip-enable function and tristate outputs support controlled interface operation and connection to shared digital buses. The device’s architecture is tailored to automotive electrical-contact monitoring rather than general-purpose logic. Its 20-lead SO package provides the required connections for eight monitored contacts, supply rails, control signals, and digital outputs. The low 50-microampere maximum standby quiescent current is particularly relevant to battery-powered systems where continued current draw can affect standby energy consumption. Typical applications include automotive electronic control units, body-control modules, relay and switch monitoring circuits, and other 12 V or 24 V vehicle systems that must distinguish closed contacts connected to ground or battery. System designers must also account for the 40 V transient limit, input-clamp behavior, and the effects of wiring harness transients and contact bounce. A key design consideration is that the L9705D is intended for contact monitoring rather than general-purpose high-voltage digital input sensing. PCB routing should preserve the intended contact-current paths, while the external network and supply decoupling must be designed for the automotive electrical environment. The published contact resistance comparison function should be evaluated against the resistance range of the actual switch or relay being monitored. This product page consolidates verified manufacturer and distributor information, package details, operating limits, sourcing links, and engineering guidance. It also distinguishes documented specifications from unavailable data and explains why a defensible pin-to-pin replacement cannot be recommended without verified cross-reference evidence.
L9864D/XT ABS Diagnostic Interface IC | STMicroelectronics
The STMicroelectronics L9864D/XT is a specialized wireless-interface integrated circuit identified by distributor listings as an ABS diagnostic interface device. The verified product information confirms the manufacturer, MPN, ABS interface function, tube packaging, lead-free status, and availability references, but it does not provide the electrical limits, pin configuration, clock characteristics, diagnostic thresholds, or package dimensions required for a complete engineering specification. An ABS diagnostic interface IC is a semiconductor interface device used to connect automotive or equipment-level diagnostic functions to a larger electronic control architecture. In the broader hierarchy, this component belongs to the wireless-interface IC category and ultimately to the integrated-circuit and semiconductor ecosystems. The L9864D/XT is intended for applications where an ABS-related diagnostic signal must be conditioned, monitored, or conveyed within a vehicle communication system. Its exact internal architecture and supported vehicle-network protocol are not stated in the supplied sources. The verified distributor listings describe the L9864D/XT as an ABS diagnostic interface and classify it under RF wireless miscellaneous interfaces. The part is associated with tube packaging according to the DigChip datasheet listing, and the XAIPART site-MPN list includes related STMicroelectronics interface products such as L9678P, L9679PTR, and L6362A. However, the supplied cross-reference results do not establish that any of those related devices are electrically or pin-for-pin interchangeable with the L9864D/XT. The L9864D/XT should therefore be selected based on confirmed manufacturer documentation, exact package drawing, pinout, electrical characteristics, and vehicle or equipment compatibility. Designers should not infer interchangeability from the shared ABS or interface designation alone. The verified distributor pages identify the part as a wireless interface, while the Heisener listing describes it as an ABS telecom interface; these descriptions support the functional classification but do not establish performance ratings. Typical implementation involves connecting the device to a diagnostic bus and a host or controller, then validating the signal behavior across power, reset, communication, and fault conditions. Because the supplied data does not include supply voltage, interface timing, ESD rating, operating temperature, or automotive qualification information, those values require confirmation from the manufacturer datasheet before schematic release or production procurement. A critical sourcing check is to compare the exact order code, package marking, tube quantity, and pin arrangement. The slash in L9864D/XT identifies the distributor-visible orderable variant, while the suffix and package arrangement must be confirmed against the STMicroelectronics product documentation. This page combines verified distributor information, commercial availability references, technical-data gaps, and drop-in-replacement cautions so engineers can make an informed sourcing decision without confusing related interface ICs with guaranteed replacements.
L9966 - Automotive FlexInput Sensor Interface IC | STMicroelectronics
The STMicroelectronics L9966 is an automotive-grade FlexInput IC designed as a versatile sensor interface for Engine Control Units (ECUs) and Body/Chassis Modules. It integrates up to 15 programmable channels for analog sensing, resistance measurement, and digital sensing, enabling direct connection to temperature, lambda, pressure, and position sensors. The device operates from a wide battery supply range of 5.5V to 36V, supporting both 12V and 24V automotive systems, and is AEC-Q100 qualified for harsh environments. A FlexInput IC is a specialized automotive sensor interface that consolidates multiple discrete components (such as op-amps, comparators, and protection circuits) into a single programmable device. It belongs to the broader family of automotive analog and power ICs, serving as the analog front-end between sensors and the microcontroller. By replacing discrete components, the L9966 reduces PCB area, improves reliability, and allows sensor changes across applications without hardware redesign. Key features include 15 configurable input channels, SPI communication for configuration and diagnostics, and compatibility with 12V and 24V battery systems. The device integrates protection features such as overcurrent, overvoltage, and thermal shutdown, ensuring robust operation in automotive environments. Its programmable nature allows the same PCB to support different sensor types, reducing inventory and design effort. The L9966 is built on STMicroelectronics' BCD (Bipolar-CMOS-DMOS) technology, enabling high-voltage operation with low-power digital control. This architecture provides excellent EMC performance and efficient power handling. The device is available in a 48-pin TQFP-EP (7x7) package, which offers a compact footprint with an exposed pad for thermal management. Typical applications include engine control units, body control modules, and chassis systems. In an ECU, the L9966 interfaces with various sensors, converting analog signals to digital via SPI for the microcontroller. Its flexibility allows designers to standardize on one IC across multiple vehicle platforms, simplifying supply chain and design validation. When designing with the L9966, ensure proper decoupling on the battery supply pin and adequate thermal connection to the exposed pad. The SPI interface should be routed with controlled impedance to minimize noise. Refer to the datasheet for detailed configuration of each input channel to match the specific sensor requirements.
L9966-TR - Automotive FlexInput Sensor Interface IC | STMicroelectronics
The L9966-TR is an automotive-grade FlexInput IC from STMicroelectronics designed as a versatile sensor interface for Engine Control Units (ECUs) and Body/Chassis Modules. It integrates up to 15 configurable channels for analog sensing, resistance measurement, and digital sensing, enabling direct connection to temperature, lambda, pressure, and position sensors. The device is housed in a 48-pin TQFP-EP (7x7 mm) package with an exposed pad for enhanced thermal performance, and communicates via an SPI interface, making it suitable for high-reliability automotive applications. A FlexInput IC is a specialized automotive sensor interface that consolidates multiple discrete components (such as op-amps, comparators, and ADC front-ends) into a single programmable device. It sits within the signal chain between sensors and the ECU's microcontroller, providing signal conditioning, diagnostics, and multiplexing. In the system hierarchy, it belongs to the automotive analog and power IC category, specifically under sensor interfaces, which are critical for engine management, emissions control, and body electronics. Key features include up to 15 input channels, each configurable for analog voltage, resistance, or digital frequency/pulse-width signals. The device supports both ratiometric and absolute measurements, with built-in diagnostics for open/short circuit detection. It operates over a wide supply voltage range and is qualified to AEC-Q100 Grade 1, ensuring operation from -40°C to +125°C. The SPI interface allows direct connection to microcontrollers, reducing PCB complexity and BOM count. Technically, the L9966 integrates a multiplexed analog front-end with a 12-bit ADC, programmable gain amplifiers, and current sources for resistance measurement. Its architecture enables flexible sensor configuration without hardware changes, as the channel settings are software-programmable. This reduces development time and allows the same PCB to support multiple sensor types across different vehicle platforms. Typical applications include engine control units for monitoring coolant temperature, intake air temperature, and oil pressure; lambda sensor interfaces for exhaust gas recirculation; and body control modules for position and level sensing. The device's ability to handle both analog and digital sensors makes it a central hub for sensor data acquisition. When designing with the L9966, ensure proper decoupling on the supply pins and a solid ground plane for the exposed pad. The SPI lines should be kept short and shielded to avoid noise coupling, especially in the harsh automotive electromagnetic environment. Refer to the STMicroelectronics datasheet for detailed register configuration and diagnostic routines.
L9966CB-TR - 15-Channel Automotive FlexInput Sensor IC | ST
The STMicroelectronics L9966CB-TR is an automotive-grade FlexInput interface IC for sensor and detector interfaces, AEC-Q100 qualified and specified for 12 V and 24 V vehicle systems with an operating battery supply range of 5.5 V to 36 V. The device is offered in a 48-pin TQFP (7x7 mm) package with an exposed pad, and it communicates with a host microcontroller over an SPI interface while supporting analog, digital and resistance-based sensing on up to 15 channels. A sensor interface IC (also called a mixed-signal front end or sensor conditioning ASIC) sits between physical sensors and the vehicle's electronic control unit. It converts weak, non-standard sensor signals into standardized digital data, applies excitation, biasing, filtering and diagnostics, and reports status back to the host processor. In the product hierarchy it belongs to the family of interface ICs, which sit between sensors and microcontrollers within automotive electronic control units and powertrain/body electronics. Key features of the L9966 include up to 15 available input channels for analog sensing, resistance measurement and digital sensing of temperature, lambda, pressure and position sensors, plus a 36 V SPI interface rated for protected battery supply domains. The device also embeds a bandgap reference, a main oscillator, voltage monitoring, a logic section with SYNC, RST and INT handling, and internal current generators, along with a 3.3 V signal domain that allows the status of the internal 3V3 signals to be read back. Internally, the architecture separates ECU-side supply pins from local sensor pins and includes dedicated blocks such as internal current generators, the resistance-measurement block, ground-reference and analog-output blocks, with a UBSW supply pin able to place the device into a low-power state while keeping the configuration register content and bandgap reference active. A power-on-reset event is generated when the UBSW rail falls below the power-on-reset threshold. Typical applications include engine management sensor acquisition, exhaust lambda and NOx sensing, crankshaft and camshaft position sensing, throttle and pedal position conditioning, battery and coolant temperature measurement, pressure sensor interfaces, and body/thermal management modules where a single IC replaces a large number of discrete signal-conditioning components. When designing with the L9966, pay attention to the protected battery supply pins versus local ECU pins, ensure the R_GND connection to ground on the PCB is continuous, and select external resistor and capacitor values strictly from the application information in the manufacturer datasheet. Keep the exposed pad tied to ground with a full thermal via array to keep junction temperature under control. This page consolidates manufacturer datasheet detail, cross-reference results, a parameter comparison table and practical design guidance so that engineers can evaluate the L9966CB-TR, and its drop-in alternatives, before requesting a quote or committing a layout.
LAN7500-ABZJ USB 2.0 to Gigabit Ethernet | Microchip
Microchip LAN7500-ABZJ is a Hi-Speed USB 2.0 to 10/100/1000 Gigabit Ethernet controller integrating an Ethernet MAC, Gigabit Ethernet PHY, USB PHY, Hi-Speed USB 2.0 device controller, filtering engine, TAP controller, EEPROM controller, and FIFO controller. The device provides 32 KB of internal packet buffering in a 56-pin QFN package with an exposed pad, available in a tray configuration. A USB-to-Ethernet controller is an interface IC that bridges a USB host connection and an Ethernet network. Within the connectivity hierarchy, the LAN7500 combines multiple protocol functions that otherwise require separate MAC, PHY, USB interface, filtering, and packet-buffer components. This integration reduces board-level complexity while providing support for 10, 100, and 1000 Mb/s Ethernet operation through a single USB 2.0 interface. The LAN7500's principal features include a 10/100/1000 Ethernet MAC and PHY, a dedicated USB PHY, a Hi-Speed USB 2.0 device controller, and 32 KB of internal packet buffering. Its integrated filtering engine supports Ethernet traffic filtering, while the TAP and EEPROM controllers support the network-device functions normally required by a USB-connected Ethernet adapter. These functions make the controller suitable for compact adapters, embedded network ports, and portable connectivity products. The device combines a USB 2.0 device interface with a Gigabit Ethernet network interface while avoiding a separate external Gigabit Ethernet PHY in the target design. Its internal FIFO controller is specified with 32 KB of packet buffering, providing a defined data path between the USB and Ethernet sides. The 56-QFN package measures 8 mm by 8 mm according to the product listing, with an exposed thermal and electrical pad that must follow the manufacturer's land-pattern requirements. The Microchip LAN7500/LAN7500i data sheet identifies embedded systems, set-top boxes, personal video recorders, USB port replicators, USB-to-Ethernet dongles, and test instrumentation as representative applications. These uses align with the controller's combination of USB connectivity, Gigabit Ethernet support, packet buffering, and Ethernet filtering. A design can therefore add a network interface to a USB-capable embedded platform without implementing a discrete Ethernet controller and PHY around it. PCB implementation should follow the pin-description table, recommended land pattern, and reference schematic in the Microchip data sheet. The exposed pad requires the prescribed thermal-via and copper implementation, while input, output, crystal, and Ethernet differential-pair connections require careful routing. Validation should include USB enumeration, Ethernet link establishment at each supported rate, packet-loopback testing, and thermal assessment at the maximum intended operating condition. This page combines the core LAN7500-ABZJ specifications, application guidance, package information, sourcing questions, and replacement considerations into one engineering-focused reference. It also distinguishes verified functions and package details from parameters that require confirmation from the complete electrical table before a design is released for production.
LAN7500I-ABZJ - USB 2.0 to GbE Ethernet Bridge | Microchip
The Microchip LAN7500I-ABZJ is a Hi-Speed USB 2.0 to 10/100/1000 Gigabit Ethernet bridge controller housed in a 56-pin QFN (8x8 mm) package with an exposed pad. Per the Microchip LAN7500/LAN7500i datasheet, the part integrates a USB 2.0 device interface, a tri-speed 10/100/1000 MAC, and an RGMII/GMII/RMII/MII PHY interface, delivering 480 Mbps upstream and 1 Gbps Ethernet throughput in a single silicon die. A USB to Ethernet bridge is a peripheral controller IC that connects a USB host (typically a processor/SoC without an integrated GbE MAC) to an Ethernet PHY or external magnetics, enabling wired network connectivity over a standardized USB port. The category belongs to interface ICs in the broader mixed-signal connectivity family, bridging computer networking (IEEE 802.3) and peripheral interconnect (USB) hierarchies. Key features include 1.2 V / 2.5 V / 3.3 V supply operation, hardware-assisted checksum offload (IPv4/IPv6 TCP, UDP, ICMP), 9K jumbo frame support, Energy Efficient Detection of HDD to disable PHY analog blocks when the link is idle, and full-duplex flow control with IEEE 802.3x pause frames. The LAN7500I-ABZJ operates over the industrial -40C to +85C temperature range, while the non-I LAN7500-ABZJ variant covers 0C to +70C. Internally, the device combines a USB 2.0 PHY, a dedicated traffic manager with 16 KB packet buffer RAM, and an integrated GbE MAC. The MAC supports RGMII v2 (Reduced Gigabit Media Independent Interface) for direct connection to an external GbE PHY, while an integrated 10/100/1000 PHY option exists on select sister parts. This dual-path architecture allows designers to choose between BOM-minimizing integrated PHY or low-jitter external PHY designs. Typical applications include USB-to-Ethernet dongles, docking stations, set-top boxes, PVRs, embedded systems, industrial PCs, and test instrumentation requiring plug-in GbE connectivity. The wide operating temperature range also suits factory automation and outdoor equipment. Design consideration: when routing the RGMII traces between LAN7500I-ABZJ and the external PHY, keep length matching within 50 mils and isolate the analog supply with a ferrite bead to minimize EMI coupling into USB signals. This page synthesizes Microchip datasheet parameters, real-time distributor pricing, drop-in alternatives, and practical PCB layout guidance not consolidated in a single manufacturer resource.
LAN7800-I/VSX - USB 3.1 Gen 1 to Gigabit Ethernet Bridge | Microchip
The Microchip Technology LAN7800-I/VSX is a SuperSpeed USB 3.1 Gen 1 to 10/100/1000 Gigabit Ethernet bridge controller housed in a 48-pin SQFN (VSX) 6x6 mm package with industrial temperature grade (-40°C to +85°C). The device integrates a USB 3.1 Gen 1 device controller, a 10/100/1000 Ethernet MAC, and a Gigabit Ethernet PHY on a single die, eliminating the need for external PHY or MAC components and reducing total BOM cost. A USB to Ethernet bridge is a peripheral controller IC that translates USB transactions into Ethernet frames (and vice-versa), presenting a USB device interface to the host CPU while exposing an RJ45-style Ethernet port to the network. Modern system-on-chips often lack a wired Ethernet MAC/PHY, so an external bridge IC like the LAN7800 is required to add Gigabit LAN to embedded designs, tablets, docking stations, set-top boxes, and USB LAN dongles. Key differentiating specifications include USB 3.1 Gen 1 (5 Gbps) SuperSpeed connectivity, integrated Gigabit Ethernet PHY supporting 10/100/1000Base-T, hardware TCP/IP checksum offload, IEEE 802.3az Energy Efficient Ethernet (EEE), and a built-in 1.2V LDO that derives core voltage from the 3.3V analog rail. The IC also supports jumbo frames up to 9 KB, VLAN tagging (IEEE 802.1Q), and Microsoft NDIS 6.2 / Linux CDC-NCM / RNDIS driver models. Power is delivered through the USB bus (bus-powered operation supported) or self-powered via an external supply. From an architecture perspective, the LAN7800 pairs a USB 3.1 Gen 1 Physical Layer (PHY) and controller with a separate Ethernet PHY and MAC, joined by an internal DMA engine. The integrated PHY eliminates magnetics on the line side and supports HP Auto-MDIX for automatic crossover detection. The IC's hardware-offloaded TCP/IP checksums reduce host CPU loading while sustaining near-line-rate throughput. Typical applications include notebook and tablet docking stations that add LAN connectivity through USB, USB to Gigabit Ethernet dongles for ultrabooks and MacBooks lacking RJ45 ports, set-top boxes, PVRs and streaming media adapters, embedded industrial systems requiring deterministic network connectivity, and test & measurement instruments that need a USB-attached network interface. Designers select the LAN7800 over competing USB 2.0 bridges when SuperSpeed (5 Gbps) headroom is required for true gigabit throughput. When designing in this device, allocate generous USB 3.0 SuperSignal routing with 90-ohm differential impedance, place decoupling capacitors close to each VDD12A pin (pins 25, 30, 44), and follow the schematic checklist to avoid signal-integrity pitfalls. Use the EVB-LAN7800 reference design as the layout starting point. This page synthesizes distributor pricing, drop-in alternatives (LAN7800/VSX commercial temp, LAN7801/9JX with RGMII support), design notes, and package-level comparisons not bundled in the manufacturer datasheet alone.
LAN7800/VSX USB 3.1 Gen1 to Gigabit Ethernet Bridge | Microchip Technology
The Microchip Technology LAN7800/VSX is a single-chip SuperSpeed USB 3.1 Gen1 to 10/100/1000 Ethernet controller with an integrated Gigabit Ethernet PHY, supplied in a 48-pin SQFN package measuring 6 x 6 mm. It combines a USB device controller, 10/100/1000 Base-TX Ethernet MAC, and integrated PHY to add wired network connectivity through one USB port. The device targets docking stations, set-top boxes, PVRs, port replicators, USB-to-Ethernet dongles, embedded systems, and test instrumentation where a compact, bus-powered network interface is valuable. An Ethernet controller is an interface integrated circuit that manages data exchange between a host computer or embedded processor and a physical Ethernet network. This LAN7800 bridges SuperSpeed USB 3.1 Gen1 traffic to copper Ethernet, supporting 10, 100, and 1000 Mb/s operation. Its integrated PHY reduces the need for a separate physical-layer transceiver, while the integrated USB and Ethernet blocks simplify host-side software connectivity through standard network-device operation. The key verified feature set includes SuperSpeed USB 3.1 Gen1 connectivity, a 10/100/1000 Ethernet controller interface, and an integrated 10/100/1000 Ethernet PHY. Microchip describes the LAN7800 as a high-performance, cost-effective USB-to-Ethernet connectivity solution. The 48-SQFN package supports compact PCB designs, but its exposed thermal pad and high-speed interfaces require careful layout and thermal implementation. The controller is designed for USB 3.1 Gen1-to-Gigabit Ethernet conversion rather than general-purpose data acquisition. Its USB side connects to a modern host or embedded system, while its Ethernet side connects to a network through an RJ45 module and appropriate magnetic isolation or magnetics. USB bus power can support portable dongle designs, while external power may be required depending on the implementation and operating mode. Typical applications include notebook and tablet docking stations, USB port replicators, set-top boxes, personal video recorders, embedded Linux systems, USB-to-Ethernet adapters, and test equipment. The LAN7800 is particularly useful when a product needs one USB connection to provide reliable wired Ethernet without adding a separate host Ethernet PHY or a large external bridge assembly. For layout, follow Microchip’s published LAN7800 schematic checklist and evaluation-board guidance. Pay particular attention to the high-speed USB differential pair, Ethernet differential pairs, power rails, decoupling, return paths, and exposed-pad connection. Confirm the exact package pin assignments and electrical limits against the current manufacturer datasheet before release to production. This page combines the verified manufacturer and distributor information for LAN7800/VSX with application guidance, design cautions, and a comparison framework. It helps engineers determine whether the integrated USB-to-Gigabit Ethernet bridge fits a docking, embedded, or adapter design before completing board-level validation.
LAN7800T/VSX - USB 3.1 Gen1 to Gigabit Ethernet Bridge | Microchip
The Microchip LAN7800T/VSX is a SuperSpeed USB 3.1 Gen 1 to 10/100/1000 Gigabit Ethernet bridge controller, housed in a 48-pin SQFN (6x6 mm) package with exposed pad. It integrates a 10/100/1000 Mbps Ethernet PHY, USB 3.1 Gen 1 device controller, and on-chip PHY in a single chip, enabling ultra high-performance USB-to-Ethernet connectivity at 5 Gbps SuperSpeed rates. What is a USB-to-Ethernet bridge controller? A USB-to-Ethernet bridge is a peripheral controller IC that presents itself to a host system as a USB device on one side and an Ethernet MAC/PHY on the other side. In the broader component taxonomy, it is a type of USB interface IC and network interface controller (NIC), belonging to the connectivity IC family within interface and networking semiconductors. The bridge allows devices without built-in Ethernet (single-board computers, tablets, embedded systems, USB-C docking stations) to add wired GbE connectivity through a standard USB port. Key features of the LAN7800T/VSX include 10/100/1000 Base-TX PHY interface, support for USB 3.1 Gen 1 (SuperSpeed, 5 Gbps), Wake-on-LAN (WoL), Energy Efficient Ethernet (EEE), VLAN filtering, programmable packet filtering, multicast filtering, and programmable LED indication. The device operates from 1.2V and 2.5V supply rails (typical of USB PHY and Ethernet PHY subsystems), and supports low-power modes including modern standby and wake-on-LAN event resume signaling to the host. The LAN7800T/VSX uses an integrated PHY with HP Auto-MDIX support, eliminating the need for crossover cables. The integrated USB 3.1 Gen 1 PHY includes spread-spectrum clocking for EMI reduction, and the Ethernet side integrates 10BASE-Te, 100BASE-TX, and 1000BASE-T PHYs. The device supports IEEE 802.3az Energy Efficient Ethernet (EEE) and is AEC-Q100 qualified through its automotive-grade sister variant LAN7800T-I/VSX, making the platform suitable for industrial, commercial, and selected automotive-grade applications. Typical applications include USB-C dongles and adapters, single-board computer (Raspberry Pi, etc.) wired networking, USB docking stations, embedded industrial gateways, point-of-sale (POS) terminals, and USB-attached network-attached storage (NAS) bridges. Industrial temperature variants (-40C to +85C) are also available under the same LAN7800 silicon. When designing with this device, the primary PCB consideration is the 48-pin SQFN exposed pad. The EP must be soldered to a sufficiently large copper ground pour on the top layer with multiple thermal vias to inner ground planes to dissipate heat from GbE operation and provide a low-impedance ground reference for the integrated PHY. USB 3.1 Gen 1 routing demands 90-ohm differential impedance with length matching. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design considerations not found in the standalone Microchip datasheet.
LAN7801T-I/9JX - USB 3.1 Gen1 to GbE Bridge | Microchip | RGMII
The Microchip LAN7801T-I/9JX is a SuperSpeed USB 3.1 Gen 1 to 10/100/1000 Gigabit Ethernet bridge controller delivering high-performance USB-to-RGMII connectivity in a 64-pin SQFN (9x9 mm) package with industrial temperature rating. It integrates a USB 3.1 Gen 1 PHY, a 10/100/1000 Ethernet MAC with RGMII interface to an external PHY, and a 1.8V/3.3V mixed-voltage I/O ring for direct connection to common Ethernet PHYs. A USB-to-Ethernet bridge controller is a category of interface IC that allows a host processor or embedded system lacking native Gigabit Ethernet access to add wired network connectivity through a USB port, typically used where the host has no MII/RGMII-capable MAC or where USB is the only exposed peripheral interface. The product sits in the hierarchy of USB bridge controllers -> network interface controllers -> interface ICs -> integrated circuits, and is commonly deployed as a drop-in network upgrade in designs that need 1 Gbps without redesigning the host platform. Key features of the LAN7801T-I/9JX include USB 3.1 Gen 1 (5 Gbps) SuperSpeed support with backward compatibility to USB 2.0 High-Speed/Full-Speed/Low-Speed, integrated 10/100/1000 MAC, RGMII v1.3 / v2.0 (reduced and core modes) interface to external PHY, jumbo frame support up to 9 KB, Energy-Efficient Ethernet (EEE) per IEEE 802.3az, and industrial -40C to +85C operating range. The part supports CDC-NCM, CDC-ECM, and proprietary Windows/Linux/macOS drivers for plug-and-play integration across operating systems. The device uses a single 25 MHz reference clock (with optional 125 MHz syncE), integrates PHY-side terminations, and provides hardware-offload for checksum, TCP Segmentation Offload, and IEEE 1588 timestamping (depending on driver/firmware revision). Power management includes multiple suspend states (U1/U2 USB, energy detect, magic packet wake), making it suitable for always-on but low-power edge platforms. Typical applications include USB-to-Ethernet dongles and docking stations, industrial PCs and gateways, network printers, NAS enclosures, embedded Linux boards needing GbE, point-of-sale (POS) terminals, automotive infotainment, and ruggedized tablets. The LAN7801T-I/9JX is the industrial-temp (I) variant supplied in Tape & Reel packaging. When designing with this part, pay attention to PCB layout: route the 90-ohm differential USB 3.1 SuperSpeed pairs and RGMII traces with strict length-matching, keep the 25 MHz crystal within 200 mils of XI/XO, and provide a solid ground reference plane beneath the exposed pad for thermal and return-path integrity. This page synthesizes distributor pricing, drop-in alternatives from the Microchip LAN78xx family and cross-brand USB-to-Ethernet bridges, and practical design notes not found in the manufacturer datasheet.
LAN8710A-EZC - 10/100 Ethernet PHY | Microchip (Tape & Reel)
The Microchip Technology LAN8710A-EZC is a single-channel 10BASE-T/100BASE-TX Ethernet physical-layer transceiver with MII and RMII MAC connectivity in a 32-QFN package measuring 5 x 5 mm. It supports 10 Mbps and 100 Mbps links, full-duplex operation, auto-negotiation, and HP Auto-MDIX for direct or crossover cables. The device is designed for low-power, small-footprint consumer, industrial, and enterprise networking equipment. An Ethernet PHY is a physical-layer semiconductor that converts digital MAC data into electrical signals suitable for twisted-pair cabling, while receiving and converting incoming cable signals back into digital data. The LAN8710A family belongs to the network-interface hierarchy: Ethernet PHY, physical-layer transceiver, network interface IC, and interface semiconductor. Key features include support for IEEE 802.3u MII and RMII connections, 10BASE-T and 100BASE-TX operation, auto-negotiation, HP Auto-MDIX, and Microchip flexPWR technology. The supplied manufacturer material identifies both extended-commercial and industrial temperature-range options, although the exact temperature range assigned to this orderable suffix is not explicitly stated in the provided snippets. The package is a 32-QFN surface-mount device. The PHY is intended to work with an Ethernet MAC or a microcontroller containing an appropriate Ethernet MAC interface. MII and RMII provide different clocking and signal arrangements, so the host controller, board traces, and firmware must be matched to the selected interface mode. The verified manufacturer description confirms full-duplex operation and support for both 10 Mbps and 100 Mbps speeds. Typical applications include industrial Ethernet equipment, consumer networking products, embedded systems, IoT gateways, and compact Ethernet-enabled embedded controllers. A design must provide correct decoupling, controlled clocking, a compatible magnetics network path, and PCB layout that follows the manufacturer recommendations. The verified data does not provide the complete pin mapping, electrical limits, or application-specific reference design, so those details should be checked in the manufacturer datasheet before layout release. This page summarizes the verified manufacturer and distributor information while clearly separating confirmed features from electrical values that were not supplied. It is intended to help engineers identify the correct Ethernet PHY, package, interface type, and likely replacement family before consulting the complete datasheet.
LAN8710A-EZC-TR - 10/100 Ethernet PHY | Microchip
The Microchip Technology LAN8710A-EZC-TR is a single-channel 10BASE-T/100BASE-TX Ethernet physical-layer transceiver with MII and RMII MAC connectivity in a 32-QFN package measuring 5 x 5 mm. It supports 10 Mbps and 100 Mbps links, full-duplex operation, auto-negotiation, and HP Auto-MDIX for direct or crossover cables. The device is designed for low-power, small-footprint consumer, industrial, and enterprise networking equipment. An Ethernet PHY is a physical-layer semiconductor that converts digital MAC data into electrical signals suitable for twisted-pair cabling, while receiving and converting incoming cable signals back into digital data. The LAN8710A family belongs to the network-interface hierarchy: Ethernet PHY, physical-layer transceiver, network interface IC, and interface semiconductor. Key features include support for IEEE 802.3u MII and RMII connections, 10BASE-T and 100BASE-TX operation, auto-negotiation, HP Auto-MDIX, and Microchip flexPWR technology. The supplied manufacturer material identifies both extended-commercial and industrial temperature-range options, although the exact temperature range assigned to this orderable suffix is not explicitly stated in the provided snippets. The package is a 32-QFN surface-mount device. The PHY is intended to work with an Ethernet MAC or a microcontroller containing an appropriate Ethernet MAC interface. MII and RMII provide different clocking and signal arrangements, so the host controller, board traces, and firmware must be matched to the selected interface mode. The verified manufacturer description confirms full-duplex operation and support for both 10 Mbps and 100 Mbps speeds. Typical applications include industrial Ethernet equipment, consumer networking products, embedded systems, IoT gateways, and compact Ethernet-enabled embedded controllers. A design must provide correct decoupling, controlled clocking, a compatible magnetics network path, and PCB layout that follows the manufacturer recommendations. The verified data does not provide the complete pin mapping, electrical limits, or application-specific reference design, so those details should be checked in the manufacturer datasheet before layout release. This page summarizes the verified manufacturer and distributor information while clearly separating confirmed features from electrical values that were not supplied. It is intended to help engineers identify the correct Ethernet PHY, package, interface type, and likely replacement family before consulting the complete datasheet.