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NXP Semiconductors MC34911BACR2
- Part No.:
- MC34911BACR2
- Manufacturer:
- NXP Semiconductors
- Category:
- Power Management - Specialized
- Package:
- 32-LQFP
- Datasheet:
-
MC34911BACR2.pdf
- Description:
- IC SYSTEM BASIS CHIP LIN 32-LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,908
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Product details
Overview
MC34911BACR2 from NXP Semiconductors is a LIN System Basis Chip (SBC) integrating a LIN 2.0/2.1 transceiver, 5.0 V/60 mA LDO regulator, one protected high-side switch (50 mA), two protected low-side switches (150 mA each), two high-voltage wake-up/analog inputs (L1/L2), and SPI-controlled diagnostics - designed for automotive body electronics such as window lift and door lock control.
For engineers reviewing the MC34911BACR2 datasheet, MC34911BACR2 pinout, MC34911BACR2 application, or MC34911BACR2 equivalent, this page delivers verified electrical specs, thermal limits, watchdog timing, LIN bus compliance (SAE J2602-2), and functional pin definitions per official NXP MC33911/MC34911 documentation.
Technical Context
The MC34911BACR2 implements a multi-mode power management architecture with Normal, Sleep, and Stop operating states - enabling ultra-low quiescent current (33 µA typical in Sleep mode at 13.5 V) while supporting LIN wake-up, cyclic sense, and forced wake-up triggers. Its integrated LIN transceiver supports up to 100 kbps with configurable waveshaping and meets SAE J2602-2 conformance requirements.
SPI interface operates up to 4.0 MHz with full register-accessible diagnostics, including HS1/LS1/LS2 current limit flags, overtemperature prewarning (115 °C), shutdown (170 °C), and LIN bus fault reporting. The analog multiplexer routes L1/L2 and VSENSE signals to ADOUT0 with selectable divider ratios (1× or 3.6×) and ±22 mV offset tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| LIN Compliance | SAE J2602-2, LIN Protocol Specification 2.0 and 2.1 - ensures interoperability in automotive LIN networks without external level-shifting. |
| Operating Temperature | -40 °C to +85 °C - qualified for passenger compartment and non-engine-bay automotive applications. |
| VDD Regulator | 5.0 V ±2.5%, 60 mA max output - powers MCU peripherals with built-in LVR reset and dropout voltage ≤250 mV at 50 mA load. |
| HS1 Switch | 50 mA continuous, RDS(on) ≤7.0 Ω @ 25 °C - drives small solenoids or LEDs with open-load and short-circuit detection. |
| LS1/LS2 Switches | 150 mA continuous, RDS(on) ≤2.5 Ω @ 25 °C - suitable for relay coils or motor pre-driver stages with active energy clamping (VSUP +5.0 V). |
| SPI Interface | 4.0 MHz max clock, tVALID ≤75 ns - enables real-time status polling and configuration updates in safety-critical sequences. |
| Wake-up Inputs | L1/L2 support digital wake-up (thresholds 2.5 V / 3.5 V) and analog sensing (divider ratio 1× or 3.6×) - reduces need for external ADC channels. |
Pinout & Package
MC34911BACR2 uses a 32-pin LQFP package (7 mm × 7 mm, 0.8 mm pitch) with exposed thermal pad. Pin functions are electrically identical to MC33911BAC per NXP documentation, with NC pins (11, 20, 21, 24, 28, 30) unconnected and requiring no PCB routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RXD/TXD | LIN Bus Interface | Full-duplex LIN physical layer I/O - RXD reports bus state to MCU; TXD accepts MCU-driven dominant/recessive commands. |
| MISO/MOSI/SCLK/CS | SPI Control Interface | 4-wire SPI port for register read/write - CS active-low enables MISO output; all timing compliant to 4.0 MHz operation. |
| HS1, LS1, LS2 | Protected Power Outputs | HS1: high-side driver for grounded loads; LS1/LS2: low-side drivers for VBAT-referenced loads - all support PWM dimming and fault flagging. |
| L1, L2 | Wake-up & Analog Inputs | Digital wake-up capable (33 kΩ series resistor required); also routed to analog multiplexer for battery or sensor voltage monitoring. |
| VSENSE | Battery Voltage Sense | Direct connection to battery rail with internal 5.25× divider - enables accurate supply monitoring without external resistors. |
| VDD | Regulated Output | 5.0 V regulated supply for MCU or sensors - requires 2–100 µF ceramic capacitor with ESR 0.1–10 Ω on PCB. |
| WDCONF | Watchdog Timing Input | External resistor sets watchdog period (8.5–108 ms range); open-circuit configures default 110 ms timeout. |
Key Features
| Feature | Design Value |
|---|---|
| Configurable Window Watchdog | Programmable timeout (8.5–108 ms) via WDCONF resistor - detects firmware hangs without requiring MCU timer resources. |
| LIN Transceiver with J2602 Support | Integrated waveshaping and undervoltage threshold (5.0–6.0 V) - eliminates need for external LIN transceiver and protection components. |
| Dual-Mode Analog Multiplexer | Routes L1/L2/VSENSE to ADOUT0 with selectable 1× or 3.6× division - enables shared ADC input for multiple voltage monitoring points. |
| Thermal Protection with Hysteresis | Overtemperature prewarning (115 °C) and shutdown (170 °C), both with 13 °C hysteresis - prevents thermal runaway during sustained overload. |
| Low-Power Stop Mode | 62 µA typical supply current at 13.5 V - maintains LIN bus wake-up capability while disabling VDD regulator to reduce system standby power. |
Applications
| Window Lift Control | Mirror Adjustment |
|---|---|
|
Use Scenario: Bidirectional DC motor control for power window glass movement with anti-pinch detection logic. IC Role / Device Role / Timing Role: MC34911BACR2 provides LIN communication, regulated 5 V supply, and PWM-controlled HS1/LS1 outputs to drive H-bridge motor direction and speed. Use Value: Integrated diagnostics (open-load, overcurrent, thermal) enable real-time motor stall detection without external sense resistors or comparators. |
Use Scenario: Position adjustment of side-view mirrors using small DC motors or stepper drivers. IC Role / Device Role / Timing Role: MC34911BACR2 acts as LIN node with dual low-side outputs (LS1/LS2) controlling mirror actuator polarity and current limiting. Use Value: 150 mA per LS channel supports typical mirror motor peak currents; L1/L2 inputs monitor switch closure for position feedback. |
| Door Lock Actuation | Sunroof Motor Control |
|
Use Scenario: Electromechanical latch activation/deactivation in central locking systems with LIN command interface. IC Role / Device Role / Timing Role: MC34911BACR2 receives LIN commands, asserts HS1 to energize solenoid, and monitors current for end-of-travel detection. Use Value: HS1's 50 mA rating and 7 Ω RDS(on) match standard door lock solenoid requirements; built-in short-circuit protection avoids fuse replacement. |
Use Scenario: Controlled opening/closing of panoramic sunroofs using brushed DC motors with soft-start and stall recovery. IC Role / Device Role / Timing Role: MC34911BACR2 supplies 5 V to sunroof MCU, interfaces via LIN, and drives motor via LS1/LS2 PWM with current foldback. Use Value: Active energy clamping (VSUP +5.0 V) protects against inductive kickback from sunroof motor windings during commutation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LIN SBC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC33911BAC/R2 | Same pinout and feature set, but rated for -40 °C to +125 °C junction temperature - higher thermal grade with identical electrical specs. | Required for engine bay or under-hood modules where ambient exceeds 85 °C. | Select MC33911BAC/R2 when extended temperature operation is mandatory; MC34911BACR2 is optimized for cost-sensitive cabin applications. |
| TLIN1029DR | Standalone LIN transceiver only (no regulator, no switches) - requires external 5 V supply and discrete FET drivers. | Suitable for designs already using separate power management ICs and needing minimal BOM count for LIN-only nodes. | Choose TLIN1029DR only if system-level integration is handled elsewhere; MC34911BACR2 consolidates 7 functions into one die. |
Compared with MC33911BAC/R2, MC34911BACR2 trades junction temperature margin (-40 °C to +125 °C → -40 °C to +85 °C) for lower cost and qualification scope, while TLIN1029DR offers no power integration - making MC34911BACR2 optimal for space-constrained, thermally moderate automotive body nodes.
Availability
MC34911BACR2 is available at Aetrix Electronics and suitable for window lift, mirror adjustment, door lock, and sunroof control applications requiring stable component supply across automotive production lifecycles.
Supply support for MC34911BACR2 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 is a global semiconductor leader focused on automotive, industrial, and IoT applications, delivering secure, scalable silicon solutions with deep domain expertise.
The MC34911BACR2 belongs to NXP's System Basis Chip product line, engineered specifically for automotive body electronics to consolidate LIN communication, power regulation, and protected switching into a single AEC-Q100 qualified device.
FAQ
What is the maximum LIN data rate supported by the MC34911BACR2?
The MC34911BACR2 supports LIN communication up to 100 kbps with configurable waveshaping circuitry. This capability complies with LIN Protocol Specification 2.0 and 2.1, as well as SAE J2602-2 conformance testing requirements. The waveshaping can be disabled in software to support higher data rates when needed for custom implementations.
Does the MC34911BACR2 include an internal voltage regulator?
Yes, the MC34911BACR2 integrates a 5.0 V low-dropout regulator with 60 mA output capability, full fault detection (overvoltage, undervoltage, overtemperature), and low-voltage reset (LVR) circuitry. It requires an external 2–100 µF ceramic capacitor with ESR between 0.1 Ω and 10 Ω on the VDD pin for stability.
How does the MC34911BACR2 handle thermal protection?
The MC34911BACR2 features dual-stage thermal protection: overtemperature prewarning triggers at 115 °C (with 13 °C hysteresis) and full shutdown occurs at 170 °C (also with 13 °C hysteresis). Both events generate interrupt flags accessible via SPI, allowing the host MCU to initiate safe shutdown or derating before damage occurs.
Can the MC34911BACR2 operate in low-power modes?
Yes, the MC34911BACR2 supports three distinct operating modes: Normal (full functionality), Sleep (VDD off, wake-up via LIN or L1/L2), and Stop (VDD on at reduced current, wake-up via CS, LIN, or forced trigger). In Stop mode, supply current is typically 62 µA at 13.5 V, enabling long-term battery-backed operation.
What are the key differences between MC34911BACR2 and MC33911BAC/R2?
The MC34911BACR2 and MC33911BAC/R2 share identical pinout, register map, and electrical specifications, differing only in temperature grade: MC34911BACR2 is rated for -40 °C to +85 °C ambient, while MC33911BAC/R2 extends to +125 °C. Both meet AEC-Q100 Grade 2, but MC33911BAC/R2 is intended for under-hood use cases.
MC34911BACR2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 32-LQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- System Basis Chip
- Current - Supply:
- 4.5mA
- Voltage - Supply:
- 5.5V ~ 27V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-LQFP (7x7)
MC34911BACR2 FAQ
1.How can I place an order for MC34911BACR2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC34911BACR2 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 MC34911BACR2 reliable?
The price and inventory of MC34911BACR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC34911BACR2 is usually 5 days.
3.What payment methods are accepted for MC34911BACR2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC34911BACR2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC34911BACR2?
MC34911BACR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC34911BACR2 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 MC34911BACR2?
For technical support, including MC34911BACR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC34911BACR2 requirements.
6.How does Aetrix verify that MC34911BACR2 is sourced from the original manufacturer or authorized distributors?
All MC34911BACR2 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 MC34911BACR2 meets industry standards.
7.What is the process for return or replacement of MC34911BACR2?
All MC34911BACR2 units undergo pre-shipment inspection (PSI). If there is an issue with MC34911BACR2, 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 MC34911BACR2 part is unused and in its original packaging.
Return procedure for MC34911BACR2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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