My Inquiry
My Account
NXP Semiconductors MC34903CP5EK
- Part No.:
- MC34903CP5EK
- Manufacturer:
- NXP Semiconductors
- Category:
- Power Management - Specialized
- Package:
- 32-SSOP (0.295", 7.50mm Width) Exposed Pad
- Datasheet:
-
MC34903CP5EK.pdf
- Description:
- IC SBC HIGH SPEED CAN 5V 32SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,794
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MC34903CP5EK from NXP Semiconductors (formerly Freescale) is a System Basis Chip (SBC) integrating a 5.0 V MCU power regulator, high-speed CAN transceiver (ISO 11898-2/5), three wake-up inputs, and SPI-controlled diagnostics. It operates across -40°C to +125°C, supports 40 kb/s–1 Mb/s CAN baud rates, and delivers <35 µA quiescent current in LP mode with VDD OFF. Used in automotive body control modules requiring fail-safe power management and bus communication.
For engineers reviewing the MC34903CP5EK datasheet, MC34903CP5EK pinout, MC34903CP5EK application, or MC34903CP5EK equivalent, this page provides verified technical context, exact pin functions for SOIC-32EP layout, low-power mode behavior, CAN/LIN interface boundaries, and validated alternative SBCs for ECU redesign or supply continuity planning.
Technical Context
The MC34903CP5EK implements a SMARTMOS-based power management architecture with dual-supply inputs (VSUP/1 and VSUP2), a fail-safe state machine, and configurable low-power modes including VDD ON/OFF variants. Its CAN interface complies with ISO 11898-2 and -5, featuring bus fault diagnostics, local failure detection, and split-termination support via the SPLIT pin.
It includes three programmable wake-up inputs (I/O-0, I/O-2, I/O-3), no LIN interface (P-suffix variant), and SPI-accessible monitoring of VSENSE, temperature, and internal regulators. The device lacks VAUX output but retains MUX-OUT for analog parameter selection and SAFE open-drain fault signaling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Output | 5.0 V ±2%, 150 mA max without external PNP; supports 200 mA with ballast transistor |
| CAN Interface | ISO 11898-2/5 compliant, 40 kb/s–1 Mb/s baud rate, integrated CANH/CANL drivers and SPLIT output |
| Quiescent Current (LP, VDD OFF) | ≤35 µA at 125°C - enables long-term battery-powered sleep in ECUs |
| Wake-up Inputs | 3 dedicated pins (I/O-0, I/O-2, I/O-3); configurable as inputs or HS outputs with short-to-GND protection |
| Operating Temp Range | -40°C to +125°C - qualified for under-hood automotive applications |
| Supply Voltage Range | VSUP/1: 4.0–28 V DC; supports cranking (low-V) and load-dump (40 V transient) conditions |
| Fault Monitoring | Integrated VDD undervoltage/overcurrent, VSUP loss detection (BATFAIL ≤4.0 V), thermal pre-warning (140°C) |
Pinout & Package
MC34903CP5EK uses a 32-pin SOIC package with exposed pad (SOIC-32EP), RoHS-compliant (EK suffix), footprint-compatible with MC34903S/MC34904/MC34905 family members.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSUP/1 | Battery Supply Input | Main power input for internal regulators and reset circuitry; supports 4.0–28 V operation and load-dump transients up to 40 V |
| VDD | MCU Power Output | 5.0 V regulated output (±2%) for microcontroller; 150 mA continuous, 200 mA with external PNP ballast |
| CANH / CANL | CAN Bus Drivers | Differential high-speed CAN physical layer outputs; include bus fault diagnostics and fail-safe shutdown |
| SPLIT | CAN Termination Midpoint | Output for connection to center tap of split CAN termination resistor network (e.g., two 60 Ω resistors) |
| SAFE | Fault Indicator | Open-drain active-low output asserted during watchdog timeout, VDD undervoltage, RST fault, or thermal shutdown |
| I/O-0 / I/O-2 / I/O-3 | Configurable Wake-up I/O | Three pins usable as wake-up inputs in LP mode or HS switch outputs; include short-to-GND detection |
| MUX-OUT | Analog Multiplex Output | SPI-selectable analog monitor output (VSENSE, die temp, VDD, etc.) with internal pull-down for current sensing |
| INT / RST / CS / SCLK / MOSI / MISO | SPI & Control Interface | Standard 4-wire SPI plus interrupt and reset signals; CS transition wakes device from LP mode with VDD ON |
Key Features
| Feature | Design Value |
|---|---|
| Fail-safe State Machine | Hardware-enforced safe state transitions with watchdog supervision, independent of MCU firmware execution |
| Low-Power Mode Flexibility | VDD ON/OFF options with sub-35 µA quiescent current; wake-up sources include CAN activity, I/O transitions, SPI messages |
| Integrated CAN Transceiver | Meets ISO 11898-2/5; includes bus fault diagnostics, local failure detection, and SPLIT output for robust termination |
| Multi-Threshold Undervoltage Detection | Separate VSUP/1 and VSUP2 UVLO thresholds (6.0 V/6.5 V) with hysteresis - supports cranking and system-level voltage sequencing |
| Diagnostic Monitoring | SPI-accessible flags for VDD overcurrent, thermal pre-warning (140°C), BATFAIL detection, and internal regulator status |
Applications
| Body Control Module (BCM) | Door Module |
|---|---|
Use Scenario: Centralized vehicle subsystem managing lighting, locks, windows, and mirrors via CAN and discrete I/O. IC Role / Device Role / Timing Role: MC34903CP5EK serves as primary power manager and CAN interface, supplying regulated 5.0 V to MCU while enabling fail-safe wake-up and diagnostics. Use Value: Eliminates need for discrete CAN transceiver and LDO; reduces BOM count by 3–4 components and supports ASIL-B–capable fault reporting via SAFE pin. | Use Scenario: Distributed module controlling window lift, mirror adjustment, and door lock actuation in harsh under-door environments. IC Role / Device Role / Timing Role: MC34903CP5EK provides battery-supplied 5.0 V power, monitors VSENSE for battery health, and wakes MCU on window switch press or CAN command. Use Value: Enables >10-year battery life in sleep mode (<35 µA) and withstands 40 V load-dump transients without external TVS. |
| Seat Control Unit | Roof Module |
Use Scenario: Motor-driven seat position memory and heating control with CAN coordination and LIN-free design. IC Role / Device Role / Timing Role: MC34903CP5EK supplies MCU and motor drivers, monitors VDD current for stall detection, and asserts SAFE on overtemperature or undervoltage. Use Value: Integrated overcurrent and thermal pre-warning (140°C) allow early motor fault detection before shutdown, improving system reliability. | Use Scenario: Sunroof, panoramic roof, or shade control unit requiring compact, thermally robust power management near glass surfaces. IC Role / Device Role / Timing Role: MC34903CP5EK delivers stable 5.0 V under wide ambient range (-40°C to +125°C), uses MUX-OUT to monitor internal die temperature, and supports cyclic sense for periodic self-check. Use Value: Eliminates external temperature sensor and reduces thermal derating margin by using on-die thermal monitoring with 140°C pre-warning threshold. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar System Basis Chip applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC33903DP5EK | Successor generation with enhanced ESD (±15 kV HBM), lower LP current (15 µA), and updated fail-safe logic; same SOIC-32EP footprint | Supports newer OEM EMC requirements; adds VDD current sense accuracy improvement and extended diagnostic register set | Preferred for new designs requiring AEC-Q100 Rev G compliance and improved transient immunity |
| TLE9471-3ES | Infineon SBC with integrated 5 V/250 mA regulator, CAN FD support, and LIN 2.2; QFN-48 package, not pin-compatible | Enables CAN FD upgrade path and multi-rail flexibility (3.3 V/5 V aux); requires PCB redesign due to different pin count and layout | Consider when migrating to CAN FD or needing higher auxiliary current capability beyond MC34903CP5EK's limits |
Compared with MC34903CP5EK, MC33903DP5EK offers direct drop-in replacement with tighter specs and modern qualification, while TLE9471-3ES provides CAN FD and expanded features at the cost of board redesign - both serve distinct lifecycle and performance tiers within automotive SBC selection.
Availability
MC34903CP5EK is available at Aetrix Electronics and suitable for automotive body control modules, door modules, seat control units, and roof modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MC34903CP5EK 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, with deep expertise in automotive electronics and functional safety.
The MC34903CP5EK belongs to NXP's System Basis Chip product line, designed specifically for automotive electronic control units requiring integrated power regulation, high-speed CAN communication, and fail-safe diagnostics in space-constrained modules.
FAQ
What is the maximum CAN baud rate supported by the MC34903CP5EK?
The MC34903CP5EK supports high-speed CAN operation from 40 kb/s up to 1.0 Mb/s, fully compliant with ISO 11898-2 and ISO 11898-5 standards. This range covers standard automotive CAN implementations including powertrain, chassis, and body networks. The MC34903CP5EK does not support CAN FD or higher-rate protocols.
Does the MC34903CP5EK include a LIN interface?
No, the MC34903CP5EK does not include a LIN interface. The "P" suffix in the part number explicitly denotes the zero-LIN variant of the MC34903 family. Unlike the MC34903S (single-LIN) version, the MC34903CP5EK omits LIN-T, RXD-L, TXD-L, and LIN pins, leaving those positions as No Connect (NC) in the SOIC-32EP package.
What is the quiescent current of the MC34903CP5EK in low-power mode with VDD turned off?
In low-power mode with VDD OFF, the MC34903CP5EK draws ≤35 µA at 125°C and ≤15 µA at 25°C from VSUP/1, as specified in the Static Electrical Characteristics table. This ultra-low current enables multi-year battery standby in always-on automotive modules such as door handles or keyless entry receivers.
Can the MC34903CP5EK drive external PNP transistors to extend VDD current capability?
Yes, the MC34903CP5EK supports external PNP ballast transistors via its VE (emitter) and VB (base) pins. When implemented, this configuration extends VDD output current capability from 150 mA to 200 mA while sharing thermal load. The drop voltage under 200 mA load is guaranteed ≤500 mV, and the ballast ratio (K) is configurable between 1.5× and 2.5× internal current.
What fault conditions cause the SAFE pin to assert on the MC34903CP5EK?
The SAFE pin on the MC34903CP5EK asserts low during confirmed fault conditions including: VDD undervoltage or overcurrent, watchdog timeout, RST pin fault (e.g., stuck low), thermal shutdown (>160°C), or VSUP loss detected via BATFAIL threshold (≤4.0 V). It is an open-drain output requiring external pull-up and serves as hardware-level fail-safe signaling to the MCU or external safety controller.
MC34903CP5EK 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
MC34903CP5EK FAQ
1.How can I place an order for MC34903CP5EK through Aetrix?
Please submit a Request for Quotation (RFQ) for MC34903CP5EK 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 MC34903CP5EK reliable?
The price and inventory of MC34903CP5EK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC34903CP5EK is usually 5 days.
3.What payment methods are accepted for MC34903CP5EK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC34903CP5EK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC34903CP5EK?
MC34903CP5EK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC34903CP5EK 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 MC34903CP5EK?
For technical support, including MC34903CP5EK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC34903CP5EK requirements.
6.How does Aetrix verify that MC34903CP5EK is sourced from the original manufacturer or authorized distributors?
All MC34903CP5EK 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 MC34903CP5EK meets industry standards.
7.What is the process for return or replacement of MC34903CP5EK?
All MC34903CP5EK units undergo pre-shipment inspection (PSI). If there is an issue with MC34903CP5EK, 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 MC34903CP5EK part is unused and in its original packaging.
Return procedure for MC34903CP5EK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MC34903CP5EK Tags
-
TPS2511DGNR
Texas Instruments
-
UTC2000/MG
Microchip Technology
-
TUSB320HAIRWBR
Texas Instruments
-
TPS61252DSGR
Texas Instruments
-
PI5USB30216CXUAEX
Diodes Incorporated
-
SN6501DBVR
Texas Instruments
-
CYPD3177-24LQXQT
Infineon Technologies
-
SN6501QDBVRQ1
Texas Instruments
-
STUSB1600AQTR
STMicroelectronics
-
SN6505BDBVR
Texas Instruments
-
SN6501DBVT
Texas Instruments
-
TPS65150PWPR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
