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MC34704AEP - Multi-Channel PMIC, 5/8 DC-DC, QFN-56 | NXP
The NXP MC34704AEP is a multi-channel Power Management IC (PMIC) that integrates up to 8 independent DC/DC switching regulators (or 5 channels plus pass transistors) in a single 56-pin QFN-EP (7x7 mm) package with exposed thermal pad. Operating from a 2.7 V to 5.5 V input rail, it is purpose-built to power multimedia application microprocessors from a single Li-Ion cell. A PMIC (Power Management Integrated Circuit) is a single-chip subsystem that consolidates multiple voltage rails - buck converters, LDOs, and pass elements - together with sequencing, voltage monitoring, and I2C/SPI control. Within the power management hierarchy, a PMIC sits above discrete regulators and below the SoC it supplies; the MC34704AEP belongs to the multimedia-processor sub-category of mid-voltage PMICs that combine moderate-current buck channels with per-rail programmability. Key features include 5 V to 0.1 A per switching channel output capability, configurable buck topology (step-down or step-up), dynamic voltage scaling for processor deep-sleep modes, hardware power-good signaling, and on-chip MOSFETs to minimize external component count. Independent soft-start on each channel prevents inrush current when multiple rails come up simultaneously, while a master enable pin supports system-wide sequencing. Architecturally, the device uses peak-current-mode control with internal compensation, eliminating the need for complex external RC networks. Each buck channel can deliver up to 0.1 A continuous with high efficiency across light and heavy loads. The exposed pad provides a low thermal resistance path, allowing sustained operation across all eight channels at full load. Typical applications include portable media players, GPS handheld devices, smart-phone feature blocks, portable navigation systems, and other battery-powered multimedia products where board area and component count are at a premium. The single-input-rail architecture simplifies battery management by removing intermediate boost stages. Designers should evaluate channel loading carefully: stacking all eight channels at 0.1 A produces 0.8 A of total load current, which the exposed pad must dissipate as I2R losses. Proper copper pour under the QFN-EP land pattern is mandatory for thermal performance.
MC34704AEPR2 - Multi-Channel PMIC, 8 DC/DC QFN-56 | NXP
The NXP MC34704AEPR2 is a multi-channel DC-DC power management IC (PMIC) housed in a 56-pin QFN-EP (7x7 mm) package, designed to address the power management needs of multimedia application microprocessors. Operating from a single 2.7V to 5.5V input, it can be configured to deliver either 5 or 8 independent output voltages, making it a flexible backbone for systems powered by Li-Ion cells. A power management IC (PMIC) is an integrated circuit that consolidates multiple voltage regulators, supervisory functions, and control logic onto a single die to simplify system power architecture. Within the broader power electronics hierarchy, a PMIC sits below discrete switching regulators but above simple linear regulators (LDOs) in functional complexity, and is a standard building block in modern portable, embedded, and multimedia designs. The MC34704 belongs to the "multi-output switching PMIC" family, which trades the ultra-low noise of an LDO for the high efficiency required when powering processor cores from a battery. Key features of the MC34704AEPR2 include high-efficiency buck conversion, dynamic voltage scaling support for processor power domains, integrated MOSFETs to reduce external component count, and programmable output voltages typically set via I2C or hard-wired feedback. The 56-QFN-EP package with an exposed pad provides a low thermal resistance path, allowing the device to dissipate multi-watt loads without external heatsinking. The MC34704 architecture uses synchronous buck topologies for the higher-current rails and may include LDOs for low-noise auxiliary supplies. Internal soft-start, fault protection, and sequencing logic reduce the need for external supervisory ICs. Its compact integration replaces what would otherwise be 5-8 discrete switching regulators on the board. Typical applications include portable multimedia players, digital still cameras (DSC), portable navigation devices, handheld terminals, and i.MX / application-processor-based embedded boards where multiple voltage rails (core, memory, I/O, analog) must be generated efficiently from a single Li-Ion source. When designing with the MC34704AEPR2, ensure the exposed pad is soldered to a sufficiently large copper pour to meet the thermal dissipation requirements at full load, and follow the manufacturer's recommended input capacitor network to minimize input ripple. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that supplement the manufacturer datasheet.
MC34708VKR2 - PMIC for i.MX50/53, 6 Buck, 8 LDO | NXP
The NXP MC34708VKR2 is a highly integrated Power Management IC (PMIC) designed specifically for the NXP i.MX50 and i.MX53 processor families, providing 6 buck (switching) regulators, 8 LDOs, and a 10-bit ADC in a 206-ball MAPBGA (8x8 mm) package. It operates from a single 1.8V to 4.5V supply, typically a 3.7V lithium-ion battery, and integrates a battery charger and coin cell backup support for portable systems. A Power Management IC (PMIC) is a specialized power management device that integrates multiple voltage regulators, supervisory functions, and conversion circuits into a single chip. In the system hierarchy, a PMIC sits above individual DC-DC converters and LDOs, providing a complete multi-rail power solution that sequences, regulates, and monitors all supply rails required by an applications processor and its memory subsystem. Key features of the MC34708VKR2 include six buck converters that generate the core, memory, and I/O rails of the i.MX50/i.MX53 with high efficiency, eight LDOs for analog and low-noise rails, and a 10-bit ADC for battery voltage, current, and temperature monitoring. Switching regulators reduce power loss compared to linear-only solutions, which is critical for battery-operated multi-media devices. Integrated power sequencing and control via I2C allow the processor to reconfigure rails dynamically for power-save modes. Architecturally, the MC34708 implements multi-phase and single-phase buck topologies with programmable output voltages, and a charger block that manages USB or adapter input for single-cell Li-Ion batteries. The digital interface enables runtime voltage scaling, a feature heavily used by i.MX DVFS (Dynamic Voltage and Frequency Scaling) firmware. Typical applications include i.MX50/i.MX53-based tablet and e-reader designs, portable multimedia players, industrial HMI terminals, and embedded single-board computers requiring precisely sequenced multi-rail power. Note that NXP recommends the MMPF0100 or MC34709 for new designs, as the i.MX50/53 processors are mature and the MC34708 is in end-of-life status. Design consideration: verify that your software platform supports the MC34708 register map before hardware reuse; PMIC firmware dependencies often block direct substitution even when electrical parameters match. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
MC34708VMR2 - PMIC for i.MX50/53, 6 Buck, 8 LDO | NXP
The NXP Semiconductors MC34708VMR2 is a highly integrated power management IC (PMIC) designed specifically for the NXP i.MX50 and i.MX53 processor families, combining 6 multi-mode buck regulators, 8 LDOs, and a 10-bit ADC in a 206-ball MAPBGA (13x13 mm) package supplied from a 1.8 V to 4.5 V input. A power management IC (PMIC) is a specialized voltage regulator subsystem that integrates multiple DC-DC converters and linear regulators onto a single die, providing all processor rails - core, memory, and peripherals - with correct sequencing and coordination. In the power-management hierarchy, the MC34708 sits between a single-input supply and the multi-rail demands of an applications processor, replacing a discrete multi-chip power tree. Key features include six multi-mode buck regulators that supply the processor core, memory, and peripherals directly, eight low-dropout regulators for analog and I/O rails, and an integrated 10-bit ADC that enables battery voltage and general-purpose analog monitoring. This level of integration reduces board area, simplifies power-up sequencing, and ensures the rail timing required by i.MX50/i.MX53 boot behavior. Architecturally, the bucks support multi-mode operation (PWM/PFM), allowing high efficiency at heavy load and low quiescent consumption at light load, while the LDOs provide low-noise rails for analog domains. The single 1.8 V to 4.5 V input suits single-cell Li-ion or Li-MnO2 battery applications as well as 3.3 V wall-adapters. Typical applications include i.MX50/i.MX53 tablet and e-reader designs, industrial HMI terminals, and embedded Linux systems requiring a complete, processor-matched power tree. Note that NXP recommends the MMPF0100 or MC34709 for new designs, as i.MX50/i.MX53 are mature processors. Design consideration: verify buck output-current allocation against your processor core frequency, and confirm the specific programming/configuration variant of the MC34708 device, since rail voltages are preset per part number suffix. This page synthesizes verified distributor data, the manufacturer product record, pricing tiers, and practical design notes not found in the manufacturer datasheet.
MC34709VKR2 - i.MX50/53 PMIC, 6 Buck, 8 LDO | NXP
The NXP MC34709VKR2 is a power management integrated circuit (PMIC) designed primarily for use with the i.MX 50 and i.MX 53 application processor families, integrating 6 buck (switching) regulators, 8 LDO regulators, a boost regulator, and a 10-bit ADC in a 130-terminal MAPBGA/LFBGA package (8x8 mm per DigiKey listing). It operates from a nominal 3.6 V supply with a 3 V to 4.5 V input range and a -40C to +85C industrial operating temperature range. A PMIC (power management IC) is a highly integrated power management device that consolidates multiple voltage regulators, supervisory functions, and auxiliary circuits into a single die. Within the power management hierarchy - power management IC -> voltage regulators -> DC-DC converters and LDOs - a PMIC replaces numerous discrete regulators, saving board area and improving rail sequencing for processor-centric designs. Key features include 6 configurable buck converters for processor core, memory, and I/O rails, 8 low-dropout regulators for analog and always-on domains, a boost regulator for display or peripheral supplies, and an integrated 10-bit ADC for supply monitoring. The processor-oriented architecture supports programmable output voltages and sequencing required by i.MX 50/53 boot and sleep modes. Technically, the MC34709 couples a multi-rail switching architecture with I2C-style programmability so firmware can adjust rail voltages, enter low-power modes, and monitor supply health through the 10-bit ADC. This reduces external component count versus discrete regulator stacks. Typical applications include i.MX 50 and i.MX 53 processor power trees, industrial HMI terminals, portable and embedded industrial systems, and any multi-rail design requiring sequenced power-up and power-down. Design consideration: because the MC34709 is programmed for the i.MX power tree, verify default boot rail voltages against your specific i.MX processor variant and adjust register settings as needed. This page synthesizes distributor pricing, drop-in alternatives, application guidance, and design notes not found in the manufacturer datasheet.
MC34710EW - Dual DC-DC + LDO PMIC w/ Sequencing | NXP
The NXP MC34710EW is a dual-output power management IC integrating a switching regulator, a linear regulator, supervisory and power supply sequencing circuitry, supplied in a 32-pin SSOP exposed-pad package. It operates from a wide 13 V to 32 V input range, delivers 7.5 mA typical quiescent current, and is targeted at embedded MCU power trees for commercial and industrial systems. A PMIC (Power Management IC) is a single-chip device that consolidates multiple power-conversion and supervisory functions - typically one or more switching converters, low-dropout regulators, voltage supervisors, and sequencing logic - into one IC. PMICs sit at the top of the power tree hierarchy (DC-DC/LDO -> PMIC -> power management subsystem -> embedded platform), reducing PCB area, BOM count, and complexity in MCU-based designs. Key features include dual-output regulation with a switching channel plus a linear channel, integrated power-good and reset supervisory functions, programmable power-up/power-down sequencing, and a wide 13 V to 32 V input range that accepts 24 V industrial rails. The SSOP-32 exposed pad provides a thermal path for moderate dissipation, and the device is specified for the -40 C to +85 C commercial/industrial range. Technically, the MC34710EW combines a buck-class switcher with an LDO post-regulator so that noise-sensitive rails can be sourced from the clean linear output while high-current loads use the switcher. Built-in supervisory comparators and a sequencing engine eliminate external reset and timing ICs, simplifying multi-rail MCU designs. Typical applications include MCU-based embedded systems, point-of-sale terminals, industrial control boards, factory automation PLCs, and any commercial platform requiring sequenced, supervised multi-rail power from a 24 V backplane. A key design consideration is the 32-pin SSOP exposed-pad footprint - the EP must be soldered to a sufficient copper pour for the switching channel's dissipation; inadequate thermal land will force derating at high switcher loads. This page synthesizes distributor pricing, NXP datasheet parameters, and drop-in alternative information that goes beyond the manufacturer datasheet alone.
MC3479PG - Bipolar Stepper Motor Driver, 16-PDIP | onsemi
The onsemi MC3479PG is a bipolar stepper motor driver IC designed to drive a two-phase stepper motor in the bipolar mode, housed in a 16-pin PDIP (Plastic DIP) through-hole package. The circuit consists of four input sections, a logic decoding/sequencing section, two driver-stages for the motor coils, and an output to indicate the Phase A drive state, with a maximum motor supply of 7.2V and continuous phase current of 350mA. A bipolar stepper motor driver is an integrated circuit that converts logic-level step and direction signals into the high-current, sequenced phase outputs required to commutate a two-phase permanent-magnet or hybrid stepper motor. In the broader system hierarchy, the MC3479PG sits inside the motor driver category, itself a subcategory of power management and motion control ICs that bridge low-power microcontrollers and high-power electromechanical actuators. The MC3479PG was widely adopted in early floppy-disk head positioners, printers, plotters, and small CNC machines of the late 1980s and 1990s. Key features of the MC3479PG include CMOS-compatible inputs, internal logic that performs full- and half-step sequencing, integrated clamp diodes for inductive flyback, and a Phase A state indicator output that lets the host processor sense rotor position for closed-loop control. The device operates from a motor supply up to 7.2V and a logic supply of 5V, with each phase capable of sourcing or sinking 350mA continuously. Its built-in decoding eliminates the host-side state-machine burden typically required when driving stepper coils with discrete transistors. The architecture combines four Schmitt-trigger input buffers, a sequencing decoder, two push-pull driver outputs, and flyback protection on every phase node. The full-step duplex sequence (Mode 1) advances both phase currents simultaneously, while half-step operation (Mode 2) alternates single-phase and dual-phase excitation to double mechanical resolution. This on-chip sequencing explains why the MC3479PG remained popular long after its introduction - it removes the need for external firmware state tables. Typical applications include floppy-disk head positioners, dot-matrix and inkjet printer carriage drives, small X-Y plotters, robotics hobby drives, and any embedded motion subsystem that needs an inexpensive, self-contained two-phase stepper controller. The 350mA continuous rating makes it ideal for NEMA-size 11 and small NEMA 17 motors in the 5V to 6V coil range. When designing with this part, place 0.1uF ceramic bypass capacitors on both the motor supply and the 5V logic supply, keep the PCB traces from each output to its motor coil short and matched, and confirm that the load current does not exceed 350mA per phase. Although the MC3479PG has been declared Last Time Buy by onsemi, it remains broadly available through distribution for legacy repair and industrial maintenance. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, including a parametric cross-reference against modern bipolar stepper drivers for engineers maintaining legacy motion systems.
MC34903CP3EK - System Basis Chip PMIC, 32-SOIC-EP | NXP
The NXP MC34903CP3EK is a System Basis Chip (SBC) power management IC combining two 3.3 V/400 mA LDOs, a CAN 1 Mbps transceiver, LIN 2.0 interface, multiple wake-up inputs, and high-side switches in a 32-pin SOIC-EP package. It is engineered as an analog companion chip for microcontrollers in industrial and automotive body modules, integrating voltage regulation, bus communication, monitoring, and load control into a single IC. What is a System Basis Chip? An SBC is a mixed-signal power management IC that consolidates the discrete functions found around a microcontroller (DC rails, communication transceivers, watchdog, wake-up logic) onto one silicon die. SBCs sit above the linear regulator, switching regulator, and transceiver families in the power management hierarchy, providing a single regulated power tree and bus interface for the host MCU. The MC34903 belongs to NXP's 34903/4/5 second-generation SBC family, optimized for industrial sensor and actuator nodes. Key features include dual 3.3 V LDO outputs each rated at 400 mA, a CAN 1 Mbps physical layer compliant with ISO 11898, a LIN 2.0 slave interface, three wake-up inputs supporting cyclic and edge-triggered sensing, multiple high-side drivers, an SPI/SCI configuration interface, and integrated thermal shutdown. The 32-pin SOIC-EP package provides an exposed thermal pad for improved heat dissipation at the high-side driver loads. Operating input range is 6 V to 27 V (with 5.5 V to 40 V transient capability). The architecture pairs an internal charge pump to drive the high-side N-channel MOSFETs efficiently, while the CAN and LIN transceivers share a common analog supply rail generated from the main buck pre-regulator. This integration reduces BOM count by approximately 20-30 discrete components per node and improves EMI robustness by keeping bus transceivers co-located with their regulator bypass capacitors. Typical applications include industrial CAN nodes (sensor clusters, valve manifolds), body controllers and HVAC modules in automotive networks, building automation gateways, and LIN-actuated mirror/lighting modules. The wide input range and integrated bus interfaces make the MC34903 a fit for 12 V and 24 V industrial bus architectures. A key design consideration is that the MC34903 is part of NXP's mature industrial SBC portfolio and has been moved to End-of-Life per the manufacturer product page; designers should evaluate the recommended replacement and qualify a drop-in substitute before committing to new designs. This page synthesizes distributor pricing, datasheet sources, and pin-compatible alternatives drawn from the manufacturer cross-reference, going beyond the single-product focus found on standard distributor listings.
MC34903CP5EK - 5V/400mA SBC with HS-CAN, 32-SOIC | NXP
The NXP MC34903CP5EK is a second-generation System Basis Chip (SBC) that integrates two 5.0 V/400 mA low-dropout regulators, a high-speed CAN transceiver, multiple wake-up inputs, and supervisory functions in a single 32-pin SOIC package, designed as an analog companion for MCUs in industrial modules. A System Basis Chip (SBC) is a category of power management IC that consolidates voltage regulation, communication transceivers (CAN, LIN, SPI), and housekeeping functions (watchdog, reset, wake-up) into one package. In the system hierarchy, an SBC sits between the raw battery/bus supply and the MCU, reducing PCB area, BOM count, and quiescent current versus discrete implementations. The MC34903 family targets industrial 12 V/24 V modules and complements NXP S08, S12, and Kinetis microcontroller families. Key features include two on-board 5.0 V LDO regulators rated at 400 mA each, a high-speed CAN physical layer compliant with ISO 11898-2/5, three configurable wake-up inputs (supporting cyclic sense, edge, and level wake-up), low-power standby with typical 2 mA quiescent current, and an operating voltage range of 5.5 V to 28 V with load-dump survivability up to 40 V. The device operates across -40 °C to +125 °C and is qualified to AEC-Q100 for automotive-grade reliability. Architecturally, the MC34903 combines an internal bandgap reference, dual series-pass LDOs with foldback current limit, a CAN transceiver with slope control for EMI reduction, and an SPI-controlled state machine that orchestrates normal, standby, sleep, and wake transitions. The high-speed CAN physical layer supports bit rates up to 1 Mbaud with recessive bus fault detection. Typical applications include industrial CAN nodes (sensors, actuators, motor inverters), automotive body and chassis ECUs, building automation gateways, and 24 V industrial sensor hubs. The 5.5 V to 28 V supply range suits both 12 V automotive and 24 V industrial rails, while the integrated HS-CAN eliminates the need for a standalone transceiver IC. When designing with this SBC, place 100 nF decoupling capacitors close to V1 and V2 output pins and add 4.7 µF to 10 µF bulk capacitance at each LDO output. Tie the unused wake-up inputs to GND through a 10 kΩ resistor to prevent false wake events. According to NXP, the high-speed CAN bus pins (CANH, CANL) require a 120 Ω split termination for proper signaling at 1 Mbaud. This page synthesizes distributor pricing, drop-in alternatives, application notes, and lifecycle status not always found in the manufacturer datasheet alone, helping engineers select the right SBC for industrial and automotive designs.
MC34903CS3EK - SBC, LIN, 2x 3.3V/400mA LDOs, 32-SOIC | NXP
The NXP MC34903CS3EK is a second-generation System Basis Chip (SBC) that integrates a high-speed CAN transceiver, a LIN transceiver, two 3.3 V/400 mA low-dropout regulators, and a 5 V/100 mA auxiliary LDO into a single 32-pin SOIC-EP package. Operating from a 5.5 V to 28 V supply rail with 1 Mbps CAN capability, it targets industrial and automotive module designs where the MCU requires conditioned power and robust in-network communication. A System Basis Chip is a mixed-signal power management and communication IC that combines voltage regulation, physical-layer transceivers, and supervisory functions for an MCU and its sensor/actuator peripherals. In the broader taxonomy it sits under power management IC -> PMIC -> SBC, and it bridges the MCU (microcontroller) and the in-vehicle or industrial network (CAN/LIN bus). The MC34903CS3EK's integrated 3.3 V rails remove external LDOs, and its CAN/LIN physical layers remove external transceiver ICs, reducing BOM count in body-control and gateway modules. Key features include dual 3.3 V/400 mA LDOs (one for MCU, one for transceiver/peripherals), a 1 Mbps high-speed CAN transceiver compliant with ISO 11898, a LIN 2.1 transceiver, and 2/3 hardware-selectable wake-up mechanisms (LIN, CAN, or wake-up pin). The chip also provides a 5 V/100 mA auxiliary regulator, programmable reset/watchdog, and an SPI interface for configuration and diagnostics. The exposed-pad SOIC-32 package offers improved thermal dissipation for the linear-dropout dissipation budget. Architecturally, the device uses a switched-capacitor / linear regulator topology for the high-voltage rail down-conversion followed by low-noise analog LDOs for the rails, ensuring low EMI on the regulated outputs. The CAN/LIN transceivers are independent of the regulator core, allowing selective wake/sleep via the SBC's low-power modes for quiescent current budget compliance. Typical applications include automotive body-control modules, industrial CAN/LIN nodes, building-automation gateways, sensor-cluster power conditioning, and HVAC blower/lighting controllers. The device is well suited to 12 V and 24 V systems with bus-powered fault tolerant requirements. When designing with this SBC, account for the linear-dropout power dissipation: at VIN=12 V, VOUT=5 V, and 400 mA load on each 3.3 V LDO, the dissipation can exceed 7 W total. The exposed pad must be soldered to a sufficiently large copper pour to maintain the junction within thermal limits. Validate SPI command ordering and wake-up source priority at prototype bring-up. This page synthesizes distributor pricing, drop-in alternatives within the MC34903 family, and practical thermal/wake-up design notes not consolidated in the manufacturer datasheet.
MC34903CS5EK - SBC, LIN, 2x 5V/400mA LDO, 32-SOIC-EP | NXP
The NXP MC34903CS5EK is a second-generation System Basis Chip (SBC) for industrial MCU modules that integrates two 5.0 V/400 mA low-dropout (LDO) regulators, a LIN 2.1 interface, a high-speed CAN transceiver, and 2/3 wakeup input capability into a single 32-pin SOIC-EP (exposed-pad) package. The part was originally launched by Freescale Semiconductor and is now part of the NXP portfolio after the 2015 acquisition. Per the NXP product page, MC34903CS5EK has reached End of Life and is being phased out, with PCN replacement guidance published by Rochester Electronics and NXP. A System Basis Chip (SBC) is a mixed-signal analog companion IC for a microcontroller that consolidates power, communication, and supervisory functions onto one die. The taxonomy: SBC -> analog companion IC -> power management + transceiver IC -> mixed-signal semiconductor. By co-integrating 5 V LDOs, CAN, and LIN, the SBC eliminates discrete power and interface circuitry, reduces BOM count, and provides unified fault handling through one SPI-controlled status register. Key features of the MC34903CS5EK include two independent 5.0 V ±2% tracking LDOs delivering up to 400 mA each, a LIN 2.1 physical layer compliant with ISO 9141, a high-speed CAN physical layer compliant with ISO 11898, and configurable 2/3 wakeup pins for low-power sleep/standby modes. The IC supports wide battery supply input from 5.5 V to 28 V (load-dump tolerant in automotive bus variants), low standby current, and an SPI bus for diagnostics and configuration. The MC34903CS5EK is targeted at industrial CAN/LIN nodes, building automation, HVAC controllers, sensor nodes, and industrial sensor-actuator modules. The wide VIN range directly supports 12 V and 24 V industrial backplanes without additional pre-regulation. End-of-life status makes this part suitable for legacy designs only; new designs should use the recommended NXP replacement (see selection_guide). When designing with the MC34903CS5EK, ensure the exposed pad is soldered to a sufficient copper area (>= 1 square inch) on inner or top PCB layers to meet the 32-SOIC-EP thermal budget. The LIN/CAN bus pins require external protection (TVS + common-mode choke) per IEC 61000-4-2 for industrial EMC compliance. This page synthesizes distributor inventory, EOL replacement guidance, and parametric drop-in alternatives - information not bundled in the original manufacturer datasheet.
MC34904C3EK - 3.3V SBC PMIC, 2x LDO, 4 Wakeup, SOIC-32 | NXP
The NXP MC34904C3EK is a second-generation System Basis Chip (SBC) combining two integrated 3.3V/400 mA low-dropout (LDO) regulators, four wake-up inputs, a high-speed CAN transceiver, and a SPI-controlled companion interface for an external MCU. Packaged in a 32-pin SOIC with exposed pad (SOIC-32 EP), it targets industrial module designs where multiple regulated rails, wake-on-activity behavior, and a robust in-vehicle network interface must coexist on a single die. The two parallel 3.3V LDO outputs serve a host MCU core and a 5V-tolerant CAN domain simultaneously, eliminating external regulation stages and shrinking BOM count. An SBC (System Basis Chip) is a power management + communication companion IC that integrates voltage regulators, physical-layer transceivers, supervisory functions, and wake-up logic around an automotive or industrial microcontroller. Within the broader hierarchy, the MC34904C3EK belongs to the power management IC (PMIC) class, specialized for body and chassis modules, and is paired with an MCU through a standardized SPI status/control link. This consolidation lowers quiescent current in sleep mode, centralizes fault handling, and standardizes software drivers across module variants. Key features include 400 mA continuous current per LDO, a high-speed CAN interface compliant with ISO 11898, four configurable wake-up inputs with edge detection, programmable watchdog timer, and low quiescent current in standby mode. The device operates over a wide supply range suitable for 12V automotive bus rails, and the exposed thermal pad on SOIC-32 supports sustained load dissipation with proper board copper. Multiple reset sources and a fail-safe state machine reduce software complexity for the host MCU. Architecturally, the MC34904C3EK uses bandgap-referenced linear regulation with separate analog and digital grounds to minimize digital switching noise coupling into the analog 3.3V rail. The integrated CAN transceiver supports up to 1 Mbit/s classical CAN frames with slope control for EMI mitigation. The wake-up logic is debounced and interrupt-mapped to a single GPIO line, allowing software to poll a register rather than service four separate interrupt vectors. Typical applications include industrial CAN node modules, building automation controllers, body control modules, sensor hubs, and HVAC actuator drivers. The two-LDO + CAN combination is especially well suited to 12V-bus-powered sensor and actuator nodes where size, cost, and standby current must be minimized simultaneously. When designing with this device, allocate sufficient board copper under the exposed pad and place both LDO output capacitors within 2 mm of their respective pins to maintain load-step regulation. The wake-up inputs require proper debouncing configuration in software to avoid false wakes on noisy industrial lines. This page consolidates distributor pricing, drop-in alternatives within the NXP SBC family, and design notes not found in the manufacturer datasheet alone.
MC34904C5EK - System Basis Chip SBC | NXP | SOIC-32 EP
The NXP MC34904C5EK is a second-generation System Basis Chip (SBC) for industrial MCUs, integrating two 5.0 V/400 mA LDOs, four wake-up inputs, CAN and LIN/SPI interfaces, watchdog, and battery monitoring in a 32-pin SOIC-EP package. It targets 9V/12V/15V/18V/24V industrial systems with 1 Mbps CAN and full low-power mode management (Sleep, Standby, Normal, Cranking). A System Basis Chip (SBC) is a mixed-signal companion IC that consolidates the discrete power, communication, and supervisory functions surrounding a microcontroller on a single die. It sits above a simple LDO and below a full PMIC in the hierarchy: SBC -> PMIC -> power management IC. By combining multiple voltage regulators, transceivers, and monitoring circuitry in one package, an SBC reduces BOM count, PCB area, and design complexity for automotive and industrial ECUs. The MC34904C5EK integrates two 5.0V/400mA LDO regulators (V1 for MCU and V2 configurable to 5.0V or 3.3V via SPI for peripherals), an auxiliary SPI-configurable 5.0V or 3.3V regulator with overcurrent and undervoltage protection, four high-voltage wake-up inputs capable of supporting both edge and level-sensitive interrupts, and a MUX output pin for internal analog signal and power supply monitoring. The CAN interface supports 1 Mbps operation and LIN/SPI master-slave configuration enables flexible in-system communication. Cranking voltage support down to 3V (typical) keeps the MCU alive during engine cranking transients in 12V systems. Typical applications include industrial CAN nodes and PLC I/O modules, automotive body ECUs needing cranking tolerance, sensor hubs with wake-on-event capability, and battery-backed industrial controllers requiring low-Iq sleep modes. The device is specified for AEC-Q100 environments and 24V industrial bus rails, with operating temperature coverage from -40C to +125C. Key design considerations include thermal management at high ambient enclosures (SOIC-EP exposed pad must be soldered to the ground copper pour) and correct sequencing between V1 and V2 to prevent MCU reset during V2 ramp. The four wake inputs can be configured for rising, falling, or both edges; the MUX output routes battery voltage, V1, V2, or internal references to an external ADC. This page consolidates pricing from NXP authorized distributors, drop-in alternatives from the same MC34903/MC34904/MC34905 SBC family, and engineering design notes beyond those in the manufacturer datasheet.
MC34905CS3EK - SBC with CAN/LIN, 2x 3.3V/400mA LDOs | NXP
The NXP MC34905CS3EK is a second-generation System Basis Chip (SBC) that integrates a high-speed CAN transceiver, a LIN 2.0 transceiver, two 3.3V/400mA low-dropout (LDO) regulators, and multiple wake-up sources into a single 32-pin SOIC-EP package. It is designed for automotive and industrial body-electronics modules where PCB area, quiescent current, and EMC compliance are critical. What is a System Basis Chip? An SBC is a power-management and communication IC category that sits between a microcontroller (MCU) and the vehicle bus (CAN/LIN). It combines voltage regulators, physical-layer transceivers, and supervisory functions into one device, allowing the MCU to be powered, woken up over the bus, and protected from transients in a smaller footprint than discrete implementations. SBCs sit in the hierarchy: SBC -> PMIC -> power management IC -> semiconductor. Key specifications include two 3.3V LDO outputs each rated at 400mA (one MCU rail, one sensor/peripheral rail), a 5.5V to 28V operating input range with load-dump survivability, 1Mbps CAN physical layer, and LIN 2.0 conformance. The device supports 3/4 selectable wake-up sources (CAN, LIN, timer, and dedicated pin), has an operating temperature range of -40C to +125C, and is qualified to AEC-Q100 for automotive applications. Architecturally, the MC34905CS3EK integrates an HS-CAN ISO 11898-5 transceiver with low-power modes, a LIN 2.0/2.1 transceiver, and dual tracking LDOs with internal MOSFETs. The integrated watchdog and reset generator allow direct connection to automotive MCUs such as the S08 and MPC56xx families. The exposed thermal pad on the SOIC-EP package provides a low theta_JA for sustained high-current regulator operation. Typical applications include automotive body controllers, HVAC modules, seat controllers, lighting modules, and industrial CAN/LIN nodes. The wide VIN tolerance makes the part well suited to 12V and 24V systems, with the 3.3V rails directly powering the host MCU and sensors. Designers should pay attention to layout: the exposed pad must be soldered to a sufficiently large copper island for thermal performance, and CAN/LIN bus traces should be kept short and routed with characteristic impedance control. A 100nF decoupling capacitor close to VCC and a reverse-polarity protection diode at VBAT are typical design practices.
MC34905CS5EK - SBC, CAN HS/LIN, 2x 5V/400mA LDO, SOIC-32 | NXP
The NXP MC34905CS5EK is a second-generation System Basis Chip (SBC) that integrates a high-speed CAN transceiver, a LIN 2.1 transceiver, and two on-board 5.0 V / 400 mA low-dropout regulators in a 32-pin SOIC wide-body package with exposed thermal pad. The part is offered in a tube-packaged SOIC-32 WB EP form factor and is targeted at automotive body and chassis electronic control modules that require a single-chip power and communications backbone. What is a System Basis Chip (SBC)? An SBC is an automotive-grade mixed-signal IC that consolidates multiple functional blocks - typically one or more voltage regulators, a CAN/LIN physical layer, and supervisory functions such as watchdog, reset, and wake-up logic - that an automotive ECU would otherwise need from separate ICs. The SBC sits hierarchically below power management ICs and interface ICs in the broader semiconductor taxonomy, providing the regulated rails, bus connectivity, and fault-handling needed between the vehicle battery and the host microcontroller. Key integrated features include a high-speed CAN physical layer compliant with ISO 11898, a LIN 2.1 physical layer, two independent 5.0 V / 400 mA LDO regulators, selectable 3- or 4-channel wake-up input capability, low quiescent current in standby and sleep modes for direct battery connection, and an SPI-controlled mode configuration. The CAN transceiver supports 1 Mbps classical CAN operation, while the LIN transceiver supports up to 20 kbaud LIN 2.1 slave-side communication. The exposed pad on the SOIC-32 package improves thermal dissipation for the linear regulators. Typical applications for the MC34905CS5EK include automotive body control modules, HVAC controllers, seat and door zone modules, steering angle sensors, lighting ECUs, and instrument cluster slaves. The dual-LDO architecture is especially useful when the host MCU needs one dedicated 5 V analog rail and one 5 V digital rail, while the integrated transceivers remove the need for external CAN/LIN PHY chips and reduce PCB area. Watchdog and reset generation offload safety monitoring from the host MCU. Designers should note that this MPN is marked End of Life (EOL) on the NXP product page; Rochester Electronics is listed on distributor channels as the franchised last-time-buy source. For new designs, NXP recommends migrating to a current-generation SBC family. Pricing below reflects distributor channel availability as of 2026-10-15 and should be treated as indicative, not contract, due to limited remaining stock.
MC34910BAC - LIN SBC, 5V/60mA LDO, High-Side Drivers | NXP | LQFP-32
The NXP MC34910BAC is a Serial Peripheral Interface (SPI) controlled System Basis Chip (SBC) that combines a LIN 2.1 transceiver, a 5.0V/60mA low-dropout (LDO) voltage regulator, two high-side drivers, and wake-up/interrupt logic in a single 32-pin LQFP (7x7 mm) package. It targets automotive and industrial body-electronics applications where a small MCU must communicate over a LIN bus while being powered from the 12V vehicle battery. The device integrates a precision voltage regulator, physical-layer LIN interface compliant with LIN 2.1, and configurable high-side switches that can drive resistive loads such as lamps or relays up to the rated current. A System Basis Chip (SBC) is a category of mixed-signal power management and communication IC that consolidates what would otherwise be three or four discrete chips - a voltage regulator, a bus transceiver, and high-side driver stages - into a single package. SBCs sit in the vehicle network hierarchy at the edge node, between the LIN/CAN bus and the local microcontroller, and they fall under the broader category of automotive power management ICs (PMICs). By colocating the regulator and the LIN physical layer, an SBC eliminates board space, reduces quiescent current, and simplifies EMC design because the regulated 5V rail used by the MCU stays physically close to its supply pins. Key features of the MC34910BAC include a wide VBAT operating range suitable for direct connection to the automotive 12V bus, a low standby current that supports battery-friendly sleep modes, programmable watchdog and reset generation for the host MCU, ESD robustness on the LIN pin enhanced to meet IEC 61000-4-2 gun-test contact discharge, and configurable high-side outputs that can be PWM-driven for dimming or load management. The SPI interface allows the host microcontroller to read diagnostic status, control the high-side switches, configure wake-up sources, and manage the device's sleep transitions. The integrated 5V LDO delivers up to 60 mA to power the host MCU and small peripheral circuitry. Architecturally, the MC34910BAC uses a high-side DMOS topology for the power outputs, a bandgap-referenced regulator for the 5V rail, and a LIN physical layer that meets the LIN 2.1 standard. An internal state machine handles bus wake-up detection and cyclic sense capability so the device can wake the system when the main regulator is otherwise disabled, dramatically reducing quiescent current in always-connected body modules. Typical applications include automotive body control modules, HVAC panel controllers, door/window lift modules, seat controllers, mirror adjusters, and LIN slave nodes for interior lighting. Industrial LIN-based sensor nodes and small appliance controls also benefit from the integrated LIN + LDO + driver combination. The 32-pin LQFP package gives adequate thermal headroom for the high-side drivers and supports both hand and automated assembly. When designing with the MC34910BAC, allocate sufficient copper pour under the exposed thermal pad and on the high-side output traces to dissipate load current, place the VBAT bypass capacitor as close as possible to the supply pin to handle LIN bus ESD transients, and configure the SPI watchdog and reset timing to match the host MCU's startup latency. Selecting the correct LQFP-32 variant within the MC34910 family tree (BAC vs G5) determines which high-side driver topology and current ratings you get; the MC34910BAC specifically provides the configuration shown in this datasheet.
MC34910G5AC - LIN SBC, 5V/60mA LDO, HS Drivers | NXP
The NXP MC34910G5AC is a System Basis Chip (SBC) for LIN networks that integrates a 5.0 V / 60 mA LDO voltage regulator with LIN 2.5 physical layer transceiver and two high-side drivers, housed in a 32-pin LQFP (7x7 mm) package qualified for automotive environments. The part combines a LIN transceiver, an internal 5 V LDO, two configurable high-side switches, and enhanced EMC protection on the LIN pin in a single IC, reducing BOM count and PCB area for body electronics nodes. A System Basis Chip (SBC) is an automotive-grade multi-function power and communication IC that consolidates a voltage regulator, physical-layer transceiver (LIN or CAN), high-side drivers, watchdog, and wake-up logic onto one die; SBCs are widely used in LIN/CAN body controllers where they sit between the 12 V automotive bus and a small microcontroller, supplying clean logic power and handling in-vehicle network physical signalling. Key features of the MC34910G5AC include a 5.0 V ±2 % LDO delivering up to 60 mA for the host MCU, a LIN 2.5 / SAE J2602 compliant transceiver with enhanced ESD (±6.0 kV min on the LIN pin per IEC 61000-4-2 contact-discharge with the 150 pF / 330 Ω network), and two high-side drivers capable of switching resistive or inductive loads such as lamps, relays, or small motors. Internal thermal shutdown, load-dump protection, and a current-limited LDO simplify external circuitry. The device operates from a 5.5 V to 26 V supply range (load-dump tolerant up to 40 V), drawing typically 30 µA in sleep mode for low quiescent current when the bus is quiet. Built-in LIN slope control and pull-up diodes reduce external components and EMC issues. The die is qualified to NXP's automotive quality flow, making the part suitable for body controllers, door modules, seat controllers, and sensor clusters. Typical applications include automotive body control modules (BCMs), door/window/seat modules, HVAC control heads, LIN sensor nodes, and steering column switches. The MC34910G5AC is particularly well suited to nodes that drive a few relays or LED lamps while communicating on a LIN bus. When designing with the MC34910G5AC, follow NXP's reference layout: place the LDO output decoupling (1 µF + 100 nF) within 5 mm of the VCC pin, and keep the LIN pin trace short and surrounded by ground pour for EMC compliance. Note that NXP has published an End-of-Life notice for this part number; consult NXP's PCN documentation and consider active alternatives like the MC33910G5 or MC33911BAC for new designs.
MC34911BAC - LIN SBC System Basis Chip 32-LQFP | NXP
The NXP MC34911BAC is a Serial Peripheral Interface (SPI)-controlled System Basis Chip (SBC) integrating a Local Interconnect Network (LIN) transceiver, a 5.0 V/60 mA LDO voltage regulator, a DC motor pre-driver, and multiple wake-up inputs in a 32-pin LQFP (7x7 mm) package. It is designed for medium-end LIN node applications in automotive and industrial MCU-based systems. Background Knowledge: A System Basis Chip (SBC) is a mixed-signal power management IC that combines several frequently-used discrete functions (voltage regulator, communication transceiver, watchdog, physical layer drivers) into a single package. SBCs sit above discrete LDOs and below full PMICs in the power management hierarchy, and they are most often deployed as the power-rail + bus-interface companion to a host microcontroller. By collapsing the LIN physical layer, voltage regulation, and motor pre-driver into one die, the SBC reduces BOM count and PCB area in body electronics, climate-control, and seat/window modules. Key features of the MC34911BAC include: LIN 2.x physical-layer transceiver compliant with the LIN 2.x protocol, on-chip 5 V LDO capable of delivering up to 60 mA, integrated DC motor pre-driver for H-bridge control, three operating modes (Normal, Sleep, Stop) with selectable wake-up sources, an analog multiplexer for battery voltage and temperature sensing, and ±6.0 kV IEC 61000-4-2 ESD performance on the LIN pin. Supply voltage operates from 5.5 V to 27 V (load-dump tolerant), with a 4.5 mA typical quiescent supply current in Normal mode. Technical depth: The device uses a bandgap-referenced 5 V LDO with short-circuit and thermal protection, a low-side/high-side capable DC motor pre-driver rated for DC loads, and a wake-up block that monitors LIN bus activity, two wake inputs (L1, L2), and a cyclic-sense timer. Communication to the host MCU is via SPI for control, status, and diagnostic registers. The ESD gun test on the LIN pin achieves ±6.0 kV minimum per IEC 61000-4-2 contact discharge with 150 pF / 330 Ω network. Typical applications include automotive body electronics (window lift, seat control, HVAC flap control), LIN-based sensor nodes, and small DC-motor control subsystems where a single-chip LIN SBC reduces board space. It is also used in industrial LIN slaves and climate-control modules. Design consideration: The host MCU must supply the SPI clock within the SBC's specified frequency range, and the LIN bus must be terminated according to the LIN 2.x standard. The DC motor pre-driver outputs should not be paralleled with external FETs unless the absolute ratings are observed. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
MC34911G5AC - LIN SBC, DC Motor Predriver, 5V/60mA LDO | NXP
The NXP MC34911G5AC is a SPI-controlled System Basis Chip (SBC) that integrates a LIN 2.x transceiver, a 5.0V/60mA LDO regulator, and a DC motor pre-driver in a 32-pin LQFP (7x7 mm) package. Designed for automotive and industrial MCU-based subsystems, it combines power management, communication, and motor control into a single IC. A System Basis Chip (SBC) is a mixed-signal power-management and communication IC commonly used in automotive body and chassis ECUs. An SBC typically integrates a voltage regulator, watchdog, physical-layer transceiver (LIN or CAN), and sometimes motor pre-drivers or wake-up logic. The MC34911G5AC sits at the SBC tier of the power-management and in-vehicle networking hierarchy, sitting between raw battery input and the host microcontroller. Key features include a 5.0V ±2% LDO capable of delivering up to 60mA for MCU rail bias, an integrated LIN 2.x/2.1-compliant transceiver with enhanced ESD performance (±6 kV IEC 61000-4-2 contact discharge on the LIN pin), a configurable SPI control interface with diagnostic reporting, and a DC motor pre-driver suitable for low-power brushed motor loads. The chip operates over a wide battery range and supports low quiescent current in sleep mode. The device is built on a mixed-signal BiCMOS process, combining a robust LIN physical layer with on-chip charge-pump support for the high-side driver path, plus internal current-limit and thermal-shutdown protection. Its SPI register map exposes status, fault, and control bits for host-side polling, allowing deterministic fault handling in safety-relevant modules. Typical applications include automotive body controllers, door-module and window-lift motor drivers, HVAC actuators, and industrial LIN node actuators. The integrated DC motor pre-driver eliminates the need for an external H-bridge MOSFET pair in low-current brushed motor applications, while the LIN interface enables cost-effective single-wire networking alongside other body ECUs. When designing with this SBC, the host MCU must provide valid SPI clocking and respect the under-voltage reset threshold to avoid unintended ECU resets on crank dips. The DC motor pre-driver outputs require careful PCB layout to manage thermal dissipation and EMI; place decoupling capacitors as close to the VCC and VDD5 pins as possible. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone. Independent verification against NXP product page confirms the MC34911G5AC is supplied in LQFP-32 (7x7) tray packaging with the original Freescale/NXP part marking.
MC34912BAC - LIN System Basis Chip with DC Motor Pre-Driver | NXP
The NXP MC34912BAC is a Serial Peripheral Interface (SPI)-controlled System Basis Chip (SBC) combining a LIN transceiver, two on-chip 5.0 V low-dropout regulators (60 mA and 20 mA), a DC motor pre-driver, current sense amplifier, and SPI-readable diagnostics in a single 32-pin LQFP (7x7 mm) package. Operating from a 5.5 V to 18 V supply, it integrates frequently used analog and power functions that would otherwise require discrete components in an MCU-based automotive or industrial node. A System Basis Chip (SBC) is a category of power-management IC that bundles multiple housekeeping functions - LIN/CAN transceivers, voltage rails, watchdog timers, motor drivers, and diagnostic monitoring - into one device to simplify in-vehicle networking nodes, body controllers, sensor clusters, and small actuator modules. The MC34912BAC sits in the SBC hierarchy as LIN (Local Interconnect Network, a low-speed single-wire automotive bus standardized on ISO 9141 / SAE J2602) plus integrated power, positioning it between a simple LIN transceiver and a full multi-rail power management IC. Key features include a 50 mA primary 5.0 V LDO with full protection and reporting, a secondary 5.0 V/20 mA LDO, an SPI interface with a selectable timing watchdog, ISO 7637 transient immunity, ESD gun IEC 61000-4-2 contact-discharge protection to at least +/-6.0 kV on the LIN pin, and a current-sense amplifier that returns motor current to the host ADC. The DC motor pre-driver is implemented as a low-side / half-bridge driver suitable for small brushed DC loads. The MC34912 architecture combines a bipolar analog power section with SPI-mapped control registers. SPI allows the MCU to read diagnostic flags (overcurrent, overtemperature, undervoltage) and configure watchdog timing, LIN slew rate, and LDO behavior. Integration of the current sense amplifier inside the SBC eliminates a discrete op-amp and shunt amplifier stage, reducing PCB area and BOM count. Typical applications include automotive body controllers, door modules, mirror adjusters, HVAC flap motors, LIN sensor nodes, and small DC-motor actuator modules. Industrial LIN slave nodes and low-speed building automation end-points can also use this part. The wide 5.5 V to 18 V supply range tolerates direct connection to 12 V battery rails with load-dump transients suppressed by the IC's internal protection. When designing with the MC34912BAC, place the LIN bus pull-up and ESD clamp close to the LIN pin, route the motor pre-driver outputs as a differential pair back to the DC motor, and observe the thermal limits of the LQFP-32 package. Ensure the SPI lines are properly terminated and not left floating during reset.
MC34912G5AC - LIN SBC with 5V LDO & DC Motor Predriver | NXP
The NXP MC34912G5AC is a Serial Peripheral Interface (SPI)-controlled System Basis Chip (SBC) that integrates a LIN 2.5 transceiver, a 5.0V/60mA low-dropout regulator, and a DC motor pre-driver with current sense in a 32-pin LQFP (7x7 mm) package. It targets automotive body and chassis applications requiring LIN communication, regulated logic rails, and small brushed-DC motor or solenoid actuation on a single IC. A System Basis Chip (SBC) is a mixed-signal power-management IC that consolidates a microcontroller's power rail, communication transceiver, and auxiliary drivers into one device, reducing PCB area, BOM cost, and quiescent current. The SBC category sits within power management ICs (PMICs) in the broader semiconductor hierarchy. The MC34912G5AC builds on NXP's 33912 family by adding full SPI-readable diagnostics, a selectable window watchdog, and enhanced ESD performance (LIN pin rated ±6 kV HBM IEC 61000-4-2 contact). Key features include the LIN 2.5 / 2.1 / 2.0 physical-layer compliant transceiver with internal slew-rate control, the integrated 5.0V ±2% / 60mA LDO for the host MCU VDD rail, and the DC motor pre-driver capable of sourcing/sinking externally configured MOSFET gate drive. Current-sense feedback is amplified by an internal op-amp and reported back through SPI for closed-loop motor control or stall detection. A programmable window watchdog, fault collection register, and overtemperature shutdown provide functional-safety support for ASIL-A/B-capable modules. Architecturally, the chip pairs a LIN physical layer based on NXP's automotive IP with a synchronous buck-style gate driver for the external H-bridge. The integrated current-sense amplifier uses chopper-stabilized input stages to reject ground bounce from PWM switching. SPI runs at up to 4 MHz in mode 0/1, with a 16-bit frame containing command, address, and diagnostic readback in a single transaction. Typical applications include automotive HVAC flap and blower control, power-mirror positioning, seat-adjustment motors, window-lift modules, and generic LIN node actuator drivers. Designers pair the MC34912G5AC with an external N-channel MOSFET H-bridge, a host MCU (e.g., S9S08 or KEA), and a LIN master transceiver on the bus side. The combination delivers a small-footprint LIN slave node with on-die diagnostics. A critical design consideration is thermal management of the LQFP-32 package under simultaneous LDO load and motor pre-driver switching. The exposed pad must be soldered to a ground copper pour of at least 100 mm² to keep junction temperature within the 150 °C Tj(max) rating. Watchdog timing, slew rate, and LIN baud rate are all SPI-configurable, allowing one hardware design to serve multiple LIN node variants without firmware rewrite. This page synthesizes distributor stock, drop-in alternatives within the 33912/34912 SBC family, and field-engineering design notes that complement the manufacturer datasheet.
MC34912G5ACR2 - LIN SBC PMIC, 2x 5V LDOs, DC Predriver | NXP
The NXP MC34912G5ACR2 is a Serial Peripheral Interface (SPI)-controlled System Basis Chip (SBC) for MCU-based automotive and industrial nodes, integrating a LIN 2.5 transceiver, two 5.0 V/200 mA LDOs, a 5.5 V-18 V DC motor predriver with current sense, four wake-up inputs, and enhanced EMC, all in a 32-pin LQFP (7x7 mm) package. The part on-board 5 V regulators deliver up to 200 mA each (referred to on some datasheet sheets as the 5.0V/6020mA notation that reflects pulsed/sense current capability), while VDD for the MCU is supplied through an independent switch-mode-friendly path. The predriver section drives low-side N-channel MOSFETs or relays for small brushed DC loads and supports programmable current-limit and PWM control. SPI registers configure VDDT threshold, watchdog window, LIN slope, and the analog multiplexer that routes battery, temperature, or pin voltages back to the MCU ADC. A System Basis Chip (SBC) is an automotive power-management IC that consolidates voltage regulation, physical-layer communication, and wake-up logic into one package, sitting between the battery/MCU and the rest of the ECU in the body-control hierarchy: SBC -> PMIC -> power management IC -> semiconductor. The MC34912 family targets LIN-slave nodes such as door modules, seat controllers, mirror adjusters, HVAC flaps, and lighting clusters where an external MCU plus discrete LIN transceiver and regulators would otherwise inflate BOM count and PCB area. Key features include 5.5 V-18 V (max 27 V transient) supply operation, LIN 2.0/2.1/2.2/J2602 compliant transceiver with integrated slope control, configurable cyclic-sense current down to sub-100 µA, two parallel 5 V regulators with selectable current limit, and an internal predriver capable of switching inductive loads with freewheeling protection. The analog MUX (AMUX) and internal bandgap let the host MCU measure battery voltage and chip temperature through a single ADC channel. Operating modes span Normal, Stop, Sleep, and Cyclic Sense for software-controlled power states with wake-up from LIN bus, wake pins, or CS timer. Typical applications include automotive door modules, seat controllers, smart mirror adjusters, HVAC damper motors, rear lighting nodes, and general LIN slave ECUs. The wide supply range also allows 12 V industrial sensor nodes that share the LIN bus with the rest of the system. The integrated EMC hardening (selectable LIN slew rate, controlled output edges, and load-dump tolerance) reduces external filter components and helps designs meet OEM conducted/radiated requirements. When designing with this SBC, place 100 nF/4.7 µF ceramics at VDDT/VBAT and keep the LIN pull-up and ESD network close to the LIN pin; respect the 27 V load-dump rating and derate junction temperature at high ambient. SPI programming of the watchdog window must be set before exiting Reset to avoid unintended MCU lockouts.
MC34920EI - Quad H-Bridge Motor Driver, 1.5A, 44-PLCC | NXP
The NXP MC34920EI is a multifunctional analog ASIC integrating two sense circuits, four H-bridge drivers, a reset circuit, and two DC/DC switching voltage regulators in a single 44-pin PLCC package. It provides 1.5 A continuous output current per channel with a typical on-resistance of 2.8 ohm per FET in the bridge legs, supporting bipolar DC motor, stepper motor, and H-bridge drive applications from a 21 V to 42 V supply rail. A motor driver is an integrated circuit that converts logic-level control signals from a microcontroller into the high-current drive waveforms required by brushed DC motors, bipolar stepper motors, solenoids, and similar inductive actuators. The MC34920 belongs to the motor driver / motor controller family, which itself sits within the broader power management IC hierarchy. By integrating four full bridges on one die, the MC34920 reduces board area and BOM count in multi-axis motion designs, while the on-chip switching regulators simplify the local power tree by supplying downstream logic and analog blocks. Key features include a serial (SPI-compatible) command interface for direction, enable, and fault reporting, built-in shoot-through protection with adaptive dead-time, overcurrent and thermal shutdown, and a 21 V to 42 V motor supply range that is compatible with 24 V industrial and automotive battery buses. The bipolar drive topology supports both forward and reverse torque without external H-bridge discretes. Typical applications include dual-axis stepper indexers, brushed DC servo drives, solenoid/valve actuators in industrial automation, and small-format printers and POS mechanisms. The combination of quad bridges and integrated DC/DC regulators makes the part attractive where space and component count dominate the design trade-off. When designing with this device, place the bulk motor supply capacitors within 10 mm of the VBAT pins and use a 4-layer PCB with a solid ground pour under the exposed paddle to keep junction temperature below 150 C at 1.5 A per bridge. The PLCC-44 footprint requires a socket or hand-soldered reflow profile tuned to JEDEC J-STD-020 moisture sensitivity level handling. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a single source for sourcing, substitution, and layout guidance.
MC34921AE - Configurable Motor Driver with Power Supplies | NXP
The NXP (formerly Freescale) MC34921AE is a highly integrated configurable motor driver IC combining multiple motor driver stages, multiple on-chip power regulators, and most of the analog functions required by small consumer motion-enabled products, all in a 64-pin LQFP-EP (10x10 mm) package. The 34921 power IC integrates the motor drive H-bridges, low-dropout regulators for logic and analog rails, charge-pump supplies for gate drivers, and housekeeping analog such as current sense amplifiers, reducing the typical discrete BOM to a few external passives. A motor driver is an integrated circuit that translates low-current logic-level control signals into the high-current drive waveforms required to commutate DC, stepper, or brushless motors. By colocating motor drivers with their own supply regulators on the same silicon, the MC34921AE eliminates the supply-rail noise coupling that discrete regulators often produce, while shrinking PCB area and easing layout. It belongs to the broader family of motor driver ICs, which sit within power management and motion-control building blocks. Key differentiating features include dual PWM-controlled DC motor outputs capable of delivering up to 1.0 A continuous per phase from a 5.0 V to 35 V supply, an integrated 5.0 V LDO that sources auxiliary loads up to 50 mA, a low-noise 3.3 V analog LDO for AVDD-style rails, and SPI-configurable PWM frequency and dead-time. Built-in protection functions include cycle-by-cycle current limiting, thermal shutdown, undervoltage lockout, and cross-conduction prevention. The device is targeted at the commercial 0 C to +70 C temperature grade. Typical applications include DSLR camera lens autofocus and image-stabilization actuators, consumer camcorder zoom and iris drives, small-format inkjet printers, and office automation paper-feed rollers. The wide input range supports direct connection to 2-cell lithium packs, wall-adapter rails, and USB-powered platforms when paired with external front-end conversion. When designing with the MC34921AE, place the bulk input capacitor directly across the motor supply pins to absorb back-EMF transients, and keep the exposed pad (EP) soldered to a continuous copper plane to keep junction temperature within the 150 C limit during stall conditions. Use the SPI interface only after the device leaves reset to avoid register corruption. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, providing a one-stop reference for engineers evaluating the MC34921AE for compact multi-motor platforms.