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NXP Semiconductors MC34910BAC
- Part No.:
- MC34910BAC
- Manufacturer:
- NXP Semiconductors
- Category:
- Power Management - Specialized
- Package:
- 32-LQFP
- Datasheet:
-
MC34910BAC.pdf
- Description:
- SYSTEM BASIS CHIP, LIN, 1X 5.0V/
- Quantity:
- Payment:
- Shipping:
Inventory:250
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Product details
Overview
MC34910BAC from NXP Semiconductors (formerly Freescale) is a LIN System Basis Chip (SBC) integrating a LIN 2.0/2.1 transceiver, dual 50 mA/60 mA high-side drivers, 5.0 V low-dropout regulator (60 mA), configurable window watchdog, and high-voltage analog/logic input (L1) with selectable divider ratio. It operates across -40 °C to +85 °C and targets automotive body electronics requiring integrated power, communication, and load control.
For engineers reviewing the MC34910BAC datasheet, MC34910BAC pinout, MC34910BAC application, or MC34910BAC equivalent, this device supports SPI-controlled diagnostics, LIN wake-up from Sleep/Stop modes, PWM-controlled high-side switching, battery voltage sensing via VSENSE, and Hall sensor supply (HVDD) - all in a 32-pin LQFP package compliant with SAE J2602-2.
Technical Context
The MC34910BAC implements a multi-mode power management architecture with Normal, Sleep, and Stop operating states. Its LIN transceiver supports up to 100 kbps with configurable waveshaping and J2602-2 conformance, including undervoltage detection (5.0–6.0 V threshold) and ±100 V transient immunity on LIN bus per ISO 7637-2.
Two independent high-side switches (HS1/HS2) feature current limiting (60–250 mA), open-load detection (5.0–7.5 mA), short-circuit protection (shutdown at VSUP −2.0 V), and thermal shutdown (140–180 °C). The L1 input serves as both digital wake-up source and high-voltage analog monitor (divided by 0.95× or 3.6×), while ADOUT0 provides multiplexed analog outputs for temperature, VSENSE, and L1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| LIN Compliance | LIN Protocol Specification 2.0, 2.1, and SAE J2602-2 - ensures interoperability with automotive LIN networks and conformance-tested physical layer behavior. |
| Operating Temp | -40 °C to +85 °C - qualified for passenger compartment and non-engine-bay automotive applications without extended thermal derating. |
| VDD Regulator | 5.0 V ±2.5%, 60 mA max output - powers MCU peripherals and enables low-voltage reset (LVR) with 4.3–4.7 V threshold. |
| High-side Outputs | HS1/HS2: RDS(on) ≤7.0 Ω @ 25 °C, current limit 60–250 mA - drives small solenoids, LEDs, or relays with built-in fault reporting. |
| SPI Interface | Up to 4.0 MHz clock, full-duplex, with CS-controlled tri-state MISO - enables real-time register access and diagnostics without CPU overhead. |
| Watchdog | Configurable window watchdog (8.5–205 ms range via external resistor) - detects firmware lockup and forces recovery without external components. |
| Analog Input | L1 pin supports 0–40 V DC input with 0.95× or 3.6× internal divider; ADOUT0 delivers ratiometric output - enables contact monitoring and battery sensing with single ADC channel. |
Pinout & Package
MC34910BAC is housed in a 32-pin LQFP (7 mm × 7 mm, 0.8 mm pitch) with exposed thermal pad. Pin assignments follow the MC33910 family layout, validated for MC34910BAC/R2 per Freescale documentation (MC33910BAC Product Specifications, pp. 51–96).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RXD / TXD | LIN bus interface I/O | Full-duplex LIN physical layer connection; RXD reports bus state to MCU, TXD controls driver output. |
| MOSI / MISO / SCLK / CS | SPI serial interface | 4-wire SPI enables register read/write, diagnostics, and configuration; MISO tri-states when CS high. |
| HS1 / HS2 | High-side switch outputs | Direct drive outputs for resistive/inductive loads; support PWM dimming and fault flagging (HSxCL, HSxOP). |
| L1 | Wake-up & analog input | Digital wake-up source (with 33 kΩ series resistor) and high-voltage analog monitor (divided by 0.95× or 3.6×). |
| VSENSE | Battery voltage sense | Direct connection to battery rail with internal 5.25× divider; enables accurate VBAT monitoring without external resistors. |
| HVDD | Hall sensor supply | Switchable 5.0 V output (20–50 mA) with 2.0% matching to VDD - powers Hall-effect sensors with minimal voltage drift. |
| VDD | Main regulator output | Primary 5.0 V supply (60 mA) for MCU core logic and peripherals; includes LVR, line/load regulation, and dropout <0.25 V. |
| WDCONF | Watchdog configuration | External resistor sets watchdog timeout (8.5–205 ms); open pin defaults to ~110 ms period. |
Key Features
| Feature | Design Value |
|---|---|
| LIN Transceiver with J2602 Support | Enables robust communication in noisy automotive environments with ±100 V pulse 3b immunity and conformance-tested slew rate control. |
| Dual High-side Switches with Diagnostics | Provides independent load control with real-time current limiting, open-load detection, and thermal shutdown - eliminating need for discrete protection circuitry. |
| Integrated Analog Multiplexer | Routes chip temperature, VSENSE, and L1 voltage to single ADOUT0 pin - reduces MCU ADC channel count and simplifies board routing. |
| Three Operating Modes (Normal/Sleep/Stop) | Reduces quiescent current to 33 µA (Sleep) or 62 µA (Stop) - meets automotive OEM requirements for low-power standby and wake-on-LIN functionality. |
| Configurable Window Watchdog | Prevents system hang with programmable timeout and window violation detection - avoids false resets during valid long-latency operations. |
Applications
| Window Lift Control | Mirror Adjustment |
|---|---|
|
Use Scenario: Bidirectional motor control for power windows with anti-pinch detection and position feedback. IC Role / Device Role / Timing Role: MC34910BAC supplies regulated 5 V to MCU and Hall sensors, drives window motor via HS1/HS2, monitors battery voltage (VSENSE), and wakes MCU via L1 or LIN bus. Use Value: Integrates power, communication, and load control in one IC - eliminates discrete regulators, level shifters, and protection diodes, reducing BOM count by ≥7 components. |
Use Scenario: Compact side-view mirror folding/unfolding and tilt adjustment using small DC motors. IC Role / Device Role / Timing Role: MC34910BAC acts as local LIN node, delivering 5 V to mirror MCU, driving motor H-bridge enable lines via HS1/HS2, and reporting faults over SPI. Use Value: Enables fail-safe operation with open-load and overtemperature detection - prevents motor stall damage and supports diagnostic trouble code (DTC) generation. |
| Door Lock Actuation | Sunroof Motor Control |
|
Use Scenario: Electromechanical door lock solenoid activation triggered by key fob or body controller via LIN. IC Role / Device Role / Timing Role: MC34910BAC receives LIN commands, asserts HS1 to energize lock solenoid, monitors supply health (VBATFAIL), and signals status via IRQ pin. Use Value: Built-in current limiting (60–250 mA) matches typical solenoid hold currents - avoids external current-sense resistors and op-amps. |
Use Scenario: Controlled opening/closing of panoramic sunroofs with obstacle detection and soft-stop behavior. IC Role / Device Role / Timing Role: MC34910BAC supplies HVDD to Hall sensors for position tracking, drives sunroof motor via HS1/HS2, senses battery voltage (VSENSE), and reports thermal events. Use Value: On-chip temperature sensing (9.0–12 mV/K gain) enables real-time junction monitoring - allows dynamic current derating before thermal shutdown. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LIN SBC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC33910BAC/R2 | Identical pinout and feature set, but rated for -40 °C to +125 °C junction temperature - higher thermal capability with same electrical specs. | Required for under-hood or high-ambient-temperature locations where >85 °C ambient is expected. | Select MC33910BAC/R2 when extended temperature range is mandatory; MC34910BAC/R2 is cost-optimized for cabin modules. |
| TLF35584ESV50 | Infineon LIN SBC with 3.3 V VDD output, integrated CAN transceiver, and enhanced ASIL-B safety features - no HVDD or L1 analog input. | Targets safety-critical systems needing ISO 26262 compliance; lacks analog monitoring capability for contact sensing. | Choose TLF35584ESV50 only if CAN coexistence or functional safety certification is required; MC34910BAC offers superior analog integration for cost-sensitive body nodes. |
Compared with MC33910BAC/R2, MC34910BAC/R2 trades junction temperature margin (-40 °C to +125 °C → -40 °C to +85 °C) for lower cost and qualification effort, while retaining identical LIN performance, high-side drive capability, and analog multiplexer functionality. Against TLF35584ESV50, MC34910BAC/R2 provides dedicated HVDD and L1 analog monitoring but omits CAN and ASIL-B support.
Availability
MC34910BAC is available at Aetrix Electronics and suitable for window lift, mirror adjustment, door lock, and sunroof control systems requiring stable component supply, automotive-grade reliability, and long-term production continuity.
Supply support for MC34910BAC includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
NXP Semiconductors acquired Freescale in 2015 and maintains full technical and manufacturing continuity for the MC33910/MC34910 family of automotive System Basis Chips.
The MC34910BAC belongs to NXP's LIN SBC product line, designed specifically for cost-optimized automotive body electronics nodes requiring integrated power regulation, LIN communication, and high-side load driving without external protection components.
FAQ
What is the maximum LIN data rate supported by the MC34910BAC?
The MC34910BAC LIN transceiver supports up to 100 kbps with waveshaping enabled, compliant with LIN Physical Layer Specification 2.0/2.1 and SAE J2602-2. At higher rates, waveshaping can be disabled via SPI register control to maintain signal integrity on longer bus segments.
Does the MC34910BAC require external components for its 5.0 V regulators?
Yes - the MC34910BAC VDD regulator requires an external capacitor of 2.0–100 µF (ESR 0.1–10 Ω), and the HVDD output requires 1.0–10 µF (ESR 0.1–5 Ω). These capacitors ensure stability, transient response, and noise suppression per Freescale's validated design guidelines.
How does the MC34910BAC handle wake-up from Sleep mode?
The MC34910BAC supports wake-up from Sleep mode via LIN bus activity, L1 digital input, cyclic sense, or forced wake-up command. Upon wake-up, it asserts IRQ and transitions to Normal mode within 150 ms, enabling rapid system resumption without MCU polling.
Can the L1 pin on the MC34910BAC be used for both digital wake-up and analog sensing simultaneously?
No - the L1 pin functions either as a digital wake-up input (with 33 kΩ series resistor) or as a high-voltage analog input (with internal 0.95× or 3.6× divider), selected via SPI-configurable L1DS bit. Simultaneous use is not supported due to shared input path and multiplexer routing.
What thermal protection features are implemented in the MC34910BAC high-side switches?
The MC34910BAC high-side switches include overtemperature shutdown (140–180 °C), with 10 °C hysteresis, and thermal prewarning interrupt (90–140 °C). Both HS1 and HS2 are independently monitored, and shutdown disables the output while setting the HSxOT flag in the HSSR register.
MC34910BAC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 32-LQFP
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Applications:
- System Basis Chip
- Current - Supply:
- 4.5mA
- Voltage - Supply:
- 5.5V ~ 18V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-LQFP (7x7)
MC34910BAC FAQ
1.How can I place an order for MC34910BAC through Aetrix?
Please submit a Request for Quotation (RFQ) for MC34910BAC on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MC34910BAC reliable?
The price and inventory of MC34910BAC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC34910BAC is usually 5 days.
3.What payment methods are accepted for MC34910BAC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC34910BAC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC34910BAC?
MC34910BAC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC34910BAC order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MC34910BAC?
For technical support, including MC34910BAC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC34910BAC requirements.
6.How does Aetrix verify that MC34910BAC is sourced from the original manufacturer or authorized distributors?
All MC34910BAC products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MC34910BAC meets industry standards.
7.What is the process for return or replacement of MC34910BAC?
All MC34910BAC units undergo pre-shipment inspection (PSI). If there is an issue with MC34910BAC, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MC34910BAC part is unused and in its original packaging.
Return procedure for MC34910BAC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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