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NXP Semiconductors MC34904C3EKR2
- Part No.:
- MC34904C3EKR2
- Manufacturer:
- NXP Semiconductors
- Category:
- Power Management - Specialized
- Package:
- 32-SSOP (0.295", 7.50mm Width) Exposed Pad
- Datasheet:
-
MC34904C3EKR2.pdf
- Description:
- IC SWITCH HIGH SIDE
- Quantity:
- Payment:
- Shipping:
Inventory:4,429
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Product details
Overview
MC34904C3EKR2 from NXP Semiconductors (formerly Freescale) is a System Basis Chip (SBC) integrating a 3.3 V MCU power regulator, high-speed CAN transceiver (ISO 11898-2/5), four programmable wake-up inputs, and SPI-controlled diagnostics. It delivers fail-safe operation, bus fault detection, and ultra-low quiescent current (≤35 µA in LP mode with VDD OFF) for automotive body control modules and industrial ECU designs.
For engineers reviewing the MC34904C3EKR2 datasheet, MC34904C3EKR2 pinout, MC34904C3EKR2 application, or MC34904C3EKR2 equivalent, this page provides verified functional identity, validated SOIC-32EP package mapping, confirmed 32-pin terminal roles, real-world LP-mode current specs, and two manufacturer-validated alternative parts for system-level power/CAN integration.
Technical Context
The MC34904C3EKR2 implements a SMARTMOS-based power management architecture with dual supply rails (VSUP1/VSUP2), a configurable 3.3 V VDD regulator supporting external PNP ballasting, and an embedded ISO 11898-5-compliant CAN physical layer with SPLIT, CANH, and CANL outputs. Its state machine enforces fail-safe behavior during watchdog timeout, VDD undervoltage, or RST pin faults.
It supports five low-power modes with wake-up via CAN bus activity, I/O transitions, SPI message, timer, or VDD overcurrent detection. The device includes analog monitoring via MUX-OUT (selectable VSENSE, VDD, VAUX, or internal reference), integrated voltage/current/temperature protection, and LIN-free configuration-distinguishing it from MC34903/34905 variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Output | 3.3 V ±3% at 150 mA; supports external PNP for 200 mA total with shared thermal dissipation |
| CAN Interface | ISO 11898-2 and -5 compliant; 40 kb/s to 1 Mb/s baud rate; integrated SPLIT output for common-mode filtering |
| Quiescent Current (LP) | ≤35 µA at 125 °C with VDD OFF; enables battery-critical applications requiring >10-year shelf life |
| Wake-up Inputs | 4 dedicated pins (I/O-0 to I/O-3); configurable as inputs or HS outputs; each triggers LP exit on edge or level |
| Operating Temp | -40 °C to +125 °C ambient; qualified per AEC-Q100 Grade 1; junction limit 150 °C |
| Supply Range | VSUP1/VSUP2: 4.0–28 V DC; supports cranking (4.0 V min) and load dump (40 V transient) |
| MUX Monitoring | Single MUX-OUT pin selectable via SPI to monitor VSENSE, VDD, VAUX, or internal bandgap reference |
Pinout & Package
MC34904C3EKR2 uses a 32-pin SOIC with exposed pad (SOIC-32EP), thermally optimized for automotive PCBs. Pin 1 is VSUP/1; pins 17–19 and 20–21 are NC (no-connect); EX PAD is GND-connected lead frame for thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSUP/1 (Pin 1) | Battery Input | Main supply for VDD regulator, POR circuitry, and internal logic; supports 4.0–28 V operation |
| VDD (Pin 28) | MCU Power Output | 3.3 V regulated output; max 150 mA native, extendable to 200 mA with external PNP transistor |
| CANH (Pin 7), CANL (Pin 8) | CAN Bus Drivers | Differential outputs compliant with ISO 11898-2/5; include bus fault diagnostics and short-to-battery protection |
| SPLIT (Pin 10) | CAN Termination Midpoint | Output for connecting center tap of split termination resistor network to reduce EMI |
| SAFE (Pin 5) | Fault Indicator | Open-drain active-low output asserted during watchdog timeout, VDD undervoltage, or RST fault |
| I/O-0 to I/O-3 (Pins 15, 21, 31, 3) | Configurable I/O | Programmable as wake-up inputs or HS drivers; support cyclic sense in LP mode with I/O-0/I/O-1 pairing |
| MUX-OUT (Pin 14) | Analog Monitor | SPI-selectable output for MCU ADC reading of VSENSE, VDD, VAUX, or internal reference |
| INT (Pin 23), RST (Pin 22) | System Control | Active-low interrupt and MCU reset outputs; both include internal pull-ups to VDD |
Key Features
| Feature | Design Value |
|---|---|
| Fail-Safe State Machine | Automatically asserts SAFE pin and disables non-critical outputs on VDD undervoltage, watchdog timeout, or RST pin fault |
| Multi-Threshold Undervoltage Detection | Separate VSUP1/VSUP2 UVLO thresholds (6.0 V/6.5 V) with hysteresis to handle cranking and cold-start conditions |
| Embedded CAN Diagnostics | Real-time bus fault detection (short-to-battery, short-to-ground, open-wire) with diagnostic flag reporting via SPI |
| LP Mode Flexibility | Five distinct low-power states with configurable wake-up sources including CAN bus activity, I/O edges, and SPI-triggered events |
| Thermal Protection | Integrated temperature pre-warning (140 °C) and shutdown (160 °C) with hysteresis to prevent permanent damage |
Applications
| Body Control Module | Industrial PLC I/O Hub |
|---|---|
Use Scenario: Centralized power and communication management for door locks, lighting, and window controls in 12 V vehicle architectures. IC Role / Device Role / Timing Role: System Basis Chip providing regulated 3.3 V MCU supply, ISO 11898-5 CAN interface, and wake-up capability from door switch inputs. Use Value: Eliminates discrete regulators, CAN transceivers, and wake-up supervisors-reducing BOM count by ≥7 components while maintaining AEC-Q100 compliance. | Use Scenario: Remote I/O node in factory automation systems requiring robust CAN connectivity and low standby power. IC Role / Device Role / Timing Role: Power manager and CAN PHY for microcontroller-based sensor/actuator interfaces operating in harsh industrial environments. Use Value: Enables <35 µA sleep current for battery-backed nodes and withstands 40 V load-dump transients without external TVS diodes. |
| Motor Drive ECU | Robotics Motion Controller |
Use Scenario: Power and communication subsystem for BLDC motor controllers in electric power steering or HVAC actuators. IC Role / Device Role / Timing Role: Supplies 3.3 V to motor control MCU, drives CAN bus for torque/speed commands, and monitors battery voltage via VSENSE. Use Value: Integrated VSENSE input and MUX-OUT allow real-time battery health monitoring without adding external ADC channels. | Use Scenario: Compact motion controller for collaborative robots needing fail-safe shutdown and multi-sensor wake-up capability. IC Role / Device Role / Timing Role: Fault-tolerant SBC delivering regulated power, CAN bus interface, and programmable wake-up from encoder or safety sensor inputs. Use Value: Fail-safe state machine ensures immediate SAFE assertion on MCU lockup-meeting ISO 13849 PLd functional safety requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar System Basis Chip applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC34903CP3EK/R2 | No CAN interface; 3.3 V VDD only; 3 wake-up inputs; no VAUX or VCAUX outputs | Suitable for LIN-only or CAN-less ECU designs where cost reduction outweighs CAN integration need | Select when CAN is not required and board space allows separate CAN transceiver |
| MC34904C5EK/R2 | 5.0 V VDD output instead of 3.3 V; identical pinout, CAN, wake-up, and LP features | Used where legacy MCU requires 5 V supply; same PCB layout but different decoupling capacitor values | Select for 5 V MCU platforms-no layout change needed, only regulator feedback resistor update |
Compared with MC34903CP3EK/R2, MC34904C3EKR2 adds integrated CAN PHY and one extra wake-up input; compared with MC34904C5EK/R2, it delivers 3.3 V instead of 5.0 V at VDD-enabling direct compatibility with modern low-voltage MCUs without level-shifting.
Availability
MC34904C3EKR2 is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC I/O hubs, and robotics motion controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MC34904C3EKR2 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 analog, power management, and automotive-grade ICs.
The MC34904C3EKR2 belongs to NXP's System Basis Chip product line, designed specifically for automotive and industrial electronic control units requiring integrated power regulation, high-speed CAN, and fail-safe supervision in a single package.
FAQ
What is the maximum continuous output current of the VDD regulator in MC34904C3EKR2?
The MC34904C3EKR2 VDD regulator delivers up to 150 mA continuously without external components. With an external PNP pass transistor connected to VB, VE, and VBAUX pins, total output current extends to 200 mA while sharing thermal load-verified in the Electrical Characteristics table under "Output Current limitation" and "Drop voltage with external transistor" parameters.
Does MC34904C3EKR2 support LIN interface functionality?
No, MC34904C3EKR2 does not include a LIN interface. Per Table 2 in the device variations documentation, MC34904 variants have zero LIN interfaces-unlike MC34903S or MC34905S. All 34904 part numbers (including MC34904C3EKR2) are designated LIN-free, with I/O-2 and LIN-T pins repurposed as general-purpose wake-up inputs.
What is the minimum VSUP voltage required to maintain regulated 3.3 V output on MC34904C3EKR2?
MC34904C3EKR2 maintains regulated 3.3 V output down to VSUP = 4.0 V in extended low-voltage mode, as specified in Table 6 ("Extended DC Low Voltage Range"). Below 4.0 V, VDD drops out and the device enters reset-ensuring reliable operation during automotive cranking events.
How does the SAFE pin function in MC34904C3EKR2 during a watchdog timeout?
During a watchdog timeout, the MC34904C3EKR2's internal state machine asserts the SAFE pin low (open-drain) within 100 µs, disabling non-critical outputs and signaling fault condition to external circuitry. This action is part of the fail-safe operation defined in Section 4.7 of the datasheet and occurs independently of MCU software control.
Is MC34904C3EKR2 pin-compatible with other devices in the 34903/4/5 family?
Yes, MC34904C3EKR2 is footprint-compatible with MC34903 and MC34905 variants in the same SOIC-32EP package, as confirmed in Figure 8 and the "Device Variations" section. However, pin functions differ-e.g., pins 17–19 are NC on MC34904 but used for LIN on MC34905S-so firmware and external circuitry must be validated per variant.
MC34904C3EKR2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 32-SSOP (0.295", 7.50mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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
MC34904C3EKR2 FAQ
1.How can I place an order for MC34904C3EKR2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC34904C3EKR2 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 MC34904C3EKR2 reliable?
The price and inventory of MC34904C3EKR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC34904C3EKR2 is usually 5 days.
3.What payment methods are accepted for MC34904C3EKR2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC34904C3EKR2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC34904C3EKR2?
MC34904C3EKR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC34904C3EKR2 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 MC34904C3EKR2?
For technical support, including MC34904C3EKR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC34904C3EKR2 requirements.
6.How does Aetrix verify that MC34904C3EKR2 is sourced from the original manufacturer or authorized distributors?
All MC34904C3EKR2 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 MC34904C3EKR2 meets industry standards.
7.What is the process for return or replacement of MC34904C3EKR2?
All MC34904C3EKR2 units undergo pre-shipment inspection (PSI). If there is an issue with MC34904C3EKR2, 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 MC34904C3EKR2 part is unused and in its original packaging.
Return procedure for MC34904C3EKR2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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