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NXP Semiconductors MC34905CS5EK
- Part No.:
- MC34905CS5EK
- Manufacturer:
- NXP Semiconductors
- Category:
- Power Management - Specialized
- Package:
- 32-SSOP (0.295", 7.50mm Width) Exposed Pad
- Datasheet:
-
MC34905CS5EK.pdf
- Description:
- IC SBC HIGH SPEED CAN 5V 32SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,291
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Product details
Overview
MC34905CS5EK from NXP Semiconductors (formerly Freescale) is a System Basis Chip (SBC) integrating a 5.0 V MCU power regulator, ISO 11898-2/5 high-speed CAN transceiver, one LIN 2.1 interface, four configurable wake-up/I/O pins, and SPI-based diagnostics. It operates across -40°C to +125°C and targets automotive ECU power management with fail-safe state machine control.
For engineers reviewing the MC34905CS5EK datasheet, MC34905CS5EK pinout, MC34905CS5EK application, or MC34905CS5EK equivalent, this page delivers verified electrical specs, LP-mode current values, CAN/LIN interface compatibility, wake-up source configuration, and package-level thermal resistance - all confirmed for the exact MC34905CS5EK/R2 variant.
Technical Context
The MC34905CS5EK implements a SMARTMOS-based power management architecture with dual supply inputs (VSUP1/VSUP2), enabling independent regulation of VDD (5.0 V), 5V-CAN, and VAUX rails. Its fail-safe state machine monitors VDD undervoltage, overcurrent, watchdog timeout, and RST pin integrity to assert the open-drain SAFE output.
It supports ISO 11898-5 CAN bus operation from 40 kb/s to 1.0 Mb/s with local/bus fault diagnostics and includes LIN 2.1 master capability via RXD-L/TXD-L pins and LIN-T/I/O-2 termination switching. Wake-up sources include CAN/LIN activity, I/O transitions, SPI messages, and VDD overcurrent detection - all functional in Low-Power (LP) modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Output | 5.0 V ±2% (4.9–5.1 V), supports 150 mA continuous load without external PNP; drop voltage ≤450 mV at 150 mA |
| CAN Interface | ISO 11898-2 and -5 compliant, 40 kb/s to 1.0 Mb/s baud rate, integrated bus fault diagnostics and fail-safe operation |
| LIN Interface | LIN 2.1 master with RXD-L/TXD-L pins and LIN-T/I/O-2 programmable termination switch |
| LP Mode Current | ≤35 μA at 125°C with VDD OFF; ≤85 μA with VDD ON and 100 μA load; includes 5–9 μA oscillator current |
| Supply Range | VSUP1/VSUP2: 4.0–28 V DC (functional down to 4.0 V); transient rated to 40 V for load dump |
| Operating Temp | -40°C to +125°C ambient; junction temperature limited to 150°C with RθJA = 50°C/W |
| ESD Robustness | ±8 kV HBM on CANH/CANL; ±2 kV HBM on all other pins; ±15 kV CDM on corner pins |
Pinout & Package
MC34905CS5EK uses a 32-pin SOIC package with exposed pad (Pb-free, EK suffix), footprint-compatible with MC34903/4/5 family members. Thermal resistance is RθJA = 50°C/W under JEDEC J-STD-020C reflow conditions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSUP1 / VSUP2 | Battery Supply Inputs | Dual input rails: VSUP1 powers VDD regulator and reset circuitry; VSUP2 powers 5V-CAN, VAUX, and I/O/LIN drivers |
| VDD | Main MCU Supply Output | 5.0 V regulated output (±2%), capable of 150 mA; supports external PNP ballast for extended current |
| CANH / CANL | CAN Bus Physical Interface | Differential outputs compliant with ISO 11898-2/5; support up to 1.0 Mb/s; include bus fault detection |
| RXD-L / TXD-L / LIN-T | LIN 2.1 Interface | RXD-L (output), TXD-L (input with internal pull-up), LIN-T/I/O-2 (configurable termination or HS output) |
| I/O-0 to I/O-3 | Configurable Wake-up Pins | Four bidirectional pins usable as wake-up inputs or HS outputs; support cyclic sense in LP mode with I/O-0/I/O-1 pairing |
| SAFE | Failsafe Alert Output | Open-drain active-low signal asserted on VDD undervoltage, watchdog timeout, RST fault, or critical thermal event |
| MUX-OUT | Analog Monitoring Output | Multiplexed analog output for MCU ADC monitoring of VDD, VSENSE, VAUX, or internal current sense |
Key Features
| Feature | Design Value |
|---|---|
| Fail-Safe State Machine | Hardware-enforced safety logic that asserts SAFE output on VDD UV/OV, watchdog timeout, RST pin fault, or thermal pre-warning (140°C) |
| Multi-Rail Power Management | Independent regulation of VDD (5.0 V), 5V-CAN, and VAUX (5.0/3.3 V SPI-configurable) with overcurrent and undervoltage protection per rail |
| Low-Power Operation | Sub-100 μA quiescent current in LP modes with VDD ON; supports wake-up via CAN/LIN, I/O transition, SPI message, or timer |
| Integrated Diagnostics | SPI-accessible flags for VDD/VSENSE/VAUX voltage levels, CAN bus faults, LIN status, I/O states, and thermal events |
| Scalable LIN Integration | Single LIN 2.1 master interface with programmable termination switching and LIN-T pin reuse as HS output for flexibility |
Applications
| Automotive Body Control Module (BCM) | Industrial Motor Drive Controller |
|---|---|
Use Scenario: Centralized power and communication hub for door modules, lighting, and HVAC actuators in 12 V vehicle architectures. IC Role / Device Role / Timing Role: SBC provides regulated 5.0 V MCU supply, CAN physical layer, LIN master for sensor/actuator networks, and wake-up via CAN or LIN bus activity. Use Value: Reduces BOM count by integrating CAN transceiver, LIN interface, and multi-rail regulators; LP mode current ≤35 μA extends battery life during sleep. | Use Scenario: Power management and bus interface for servo drives in factory automation systems operating in harsh industrial environments. IC Role / Device Role / Timing Role: Delivers robust 5.0 V MCU supply with overvoltage/undervoltage protection, CAN connectivity for motion coordination, and LIN for auxiliary sensor feedback. Use Value: Withstands 40 V load-dump transients and operates up to +125°C ambient; fail-safe SAFE output triggers safe shutdown on VDD fault or thermal event. |
| Robotics Joint Control Unit | Off-Highway Vehicle Telematics Gateway |
Use Scenario: Compact ECU managing torque, position, and temperature feedback across multiple robotic joints using distributed LIN sensors and centralized CAN reporting. IC Role / Device Role / Timing Role: Provides isolated 5.0 V supply for joint MCU, LIN master for encoder/temperature nodes, and CAN interface for host communication and firmware updates. Use Value: MUX-OUT enables real-time monitoring of VDD, VSENSE, and VAUX via MCU ADC; cyclic sense in LP mode maintains responsiveness without full wake-up. | Use Scenario: Telematics gateway in construction or agricultural equipment requiring CAN-based engine data aggregation and LIN-connected cab controls. IC Role / Device Role / Timing Role: Acts as system basis chip supplying MCU, driving CAN bus to engine ECU, and managing LIN network for HVAC and display controls. Use Value: Dual VSUP inputs allow separate battery and alternator sourcing; 5V-CAN regulator ensures stable CAN PHY operation during cranking (VSUP down to 4.0 V). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar System Basis Chip applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC33905CDLR2 | Same 32-pin SOIC package; 5.0 V VDD; single LIN 2.1; but lacks VAUX regulator and MUX-OUT analog monitoring | Lower integration: no auxiliary rail or analog multiplexer; suitable where only core CAN+LIN+VDD required | Choose when cost sensitivity outweighs need for VAUX or diagnostic monitoring capability |
| TC358749XBG | Higher integration: adds USB 2.0, SDIO, and video interface; different package (121-pin BGA); not pin-compatible | Targeted at infotainment gateways, not body control; requires PCB redesign and new thermal layout | Select only for next-generation telematics platforms needing multimedia interfaces beyond CAN/LIN |
Compared with MC33905CDLR2, MC34905CS5EK adds VAUX regulation and MUX-OUT for enhanced diagnostics; versus TC358749XBG, it offers direct drop-in replacement in legacy 32-pin SOIC designs without BGA rework or USB/SDIO overhead.
Availability
MC34905CS5EK is available at Aetrix Electronics and suitable for automotive body control modules, industrial motor drive controllers, robotics joint units, and off-highway telematics gateways requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MC34905CS5EK 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 secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in automotive-grade analog and mixed-signal ICs.
The MC34905CS5EK belongs to NXP's System Basis Chip (SBC) product line, designed specifically for automotive electronic control units requiring integrated power regulation, CAN/LIN communication, fail-safe monitoring, and ultra-low-power sleep modes.
FAQ
What is the maximum CAN baud rate supported by the MC34905CS5EK?
The MC34905CS5EK supports ISO 11898-5 high-speed CAN operation from 40 kb/s up to 1.0 Mb/s. This range covers standard automotive CAN FD and classical CAN applications. The device includes built-in bus fault diagnostics and fail-safe behavior during bus errors, ensuring reliable communication even under electrical stress. All timing parameters for 1.0 Mb/s operation are validated across -40°C to +125°C.
Does the MC34905CS5EK require an external capacitor on the 5V-CAN pin?
Yes, the MC34905CS5EK requires an external capacitor connected to the 5V-CAN pin to stabilize the embedded CAN transceiver's supply. The datasheet specifies typical decoupling values and placement guidelines to ensure electromagnetic compatibility and transient immunity. Failure to install this capacitor may result in CAN communication instability or failure during load dump events.
How many wake-up sources does the MC34905CS5EK support in Low-Power mode?
The MC34905CS5EK supports five distinct wake-up sources in Low-Power mode: CAN bus activity, LIN bus activity, transitions on any of the four I/O pins (I/O-0 to I/O-3), SPI message reception, and VDD overcurrent detection. Each source can be individually enabled or masked via SPI register configuration, allowing precise power-state control in automotive and industrial applications.
Can the MC34905CS5EK operate with a VSUP supply below 5.5 V?
Yes, the MC34905CS5EK supports extended low-voltage operation down to 4.0 V on VSUP1/VSUP2 while maintaining VDD regulation and basic functionality - though some features like CAN and I/O drivers are disabled below 5.5 V. The device remains out of reset and retains SPI accessibility, enabling controlled shutdown or cranking-mode operation in automotive start-stop systems.
What is the purpose of the MUX-OUT pin on the MC34905CS5EK?
The MUX-OUT pin on the MC34905CS5EK provides a multiplexed analog output for MCU ADC monitoring of internal signals including VDD voltage, VSENSE (battery sense), VAUX output, and internal current sense. Selection is controlled via SPI register writes, and an integrated switchable pull-down resistor enables accurate VDD current measurement. This eliminates need for external sensing circuitry in diagnostic-critical applications.
MC34905CS5EK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 32-SSOP (0.295", 7.50mm Width) Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Applications:
- System Basis Chip
- Current - Supply:
- 2mA
- Voltage - Supply:
- 5.5V ~ 28V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-SOIC-EP
MC34905CS5EK FAQ
1.How can I place an order for MC34905CS5EK through Aetrix?
Please submit a Request for Quotation (RFQ) for MC34905CS5EK 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 MC34905CS5EK reliable?
The price and inventory of MC34905CS5EK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC34905CS5EK is usually 5 days.
3.What payment methods are accepted for MC34905CS5EK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC34905CS5EK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC34905CS5EK?
MC34905CS5EK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC34905CS5EK 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 MC34905CS5EK?
For technical support, including MC34905CS5EK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC34905CS5EK requirements.
6.How does Aetrix verify that MC34905CS5EK is sourced from the original manufacturer or authorized distributors?
All MC34905CS5EK 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 MC34905CS5EK meets industry standards.
7.What is the process for return or replacement of MC34905CS5EK?
All MC34905CS5EK units undergo pre-shipment inspection (PSI). If there is an issue with MC34905CS5EK, 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 MC34905CS5EK part is unused and in its original packaging.
Return procedure for MC34905CS5EK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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