MCZ33903C5EK - SBC Gen2 with High-Speed CAN & LIN | NXP
MPN: MCZ33903C5EK ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.5 | $7.50 |
| 10 | $6.9 | $69.00 |
| 100 | $6.1 | $610.00 |
| 500 | $5.4 | $2,700.00 |
| 1,000 | $4.85 | $4,850.00 |
MCZ33903C5EK Overview
A System Basis Chip is a category of mixed-signal automotive IC that combines a voltage regulator with one or more communication transceivers (CAN, LIN, FlexRay) on a single die, reducing module PCB area and bill-of-materials versus discrete implementations. SBCs sit hierarchically under automotive microcontroller power trees and above discrete CAN/LIN transceivers, providing watchdog, reset, fail-safe state machine, and bus diagnostics that no discrete transceiver offers.
Key features include built-in enhanced high-speed CAN compliant with ISO 11898-2 and -5, local and bus failure diagnostics, integrated protection and fail-safe handling, normal and sleep modes, watchdog and reset generation, and a 5V LDO output. The 32-pin SOIC-EP provides an exposed thermal pad for heat dissipation in body, chassis, and powertrain modules that run directly from the 12V automotive bus.
Architecturally, the device couples a synchronous buck pre-regulator feeding an internal 5V LDO with charge-pump biasing for the high-speed CAN drivers; LIN is implemented as a windowing, slew-rate-controlled physical layer per ISO 17987. Diagnostic state machines flag dominant timeouts, thermal shutdown, and CAN bus dominant clamping for the host MCU.
Typical applications include automotive body control modules, HVAC controllers, seat control units, instrument clusters, gateway modules, and other 12V-powered ECUs that require networked communications and regulated MCU power. The wide 9V-27V operating range supports both traditional 12V and emerging 24V heavy-duty truck electrical systems with adequate transient headroom.
When designing with this part, observe load-dump and jump-start transient immunity per ISO 7637, place bulk and bypass capacitance close to the regulator and CAN pins, and verify dominant-timeout timing in the chosen sleep/wake strategy. The exposed pad must be soldered to a sufficient copper pour to keep junction temperature within the -40C to +125C operating range at full load.
This page synthesizes distributor pricing, drop-in alternatives, and practical automotive design notes not found in the bare manufacturer datasheet, with citations to NXP's official MC33903 product page.
Drop-in alternatives for MCZ33903C5EK — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with MCZ33903C5EK (same form factor and footprint) — differing in Package, CAN Data Rate, Product Type, Watchdog / Reset.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MCZ33903C5EK/R2
✅ Drop-In📋 Reference alternative (not in catalog)
MCZ33903CS5EK
✅ Drop-In📋 Reference alternative (not in catalog)
MCZ33903DS3EKR2
✅ Drop-In📋 Reference alternative (not in catalog)
MCZ33390EFR2
✅ Drop-In📋 Reference alternative (not in catalog)
MCZ33903C5EK Maximum Ratings & Electrical Characteristics
| Product Type | System Basis Chip (SBC) Gen2 |
| Integrated CAN Transceiver | High-speed CAN, ISO 11898-2 / ISO 11898-5 |
| Integrated LIN Transceiver | Yes (per family description) |
| Integrated Voltage Regulator | 5V LDO for MCU / external loads |
| CAN Data Rate (minimum) | 20 kbps |
| Operating Modes | Normal / Sleep |
| Nominal Battery Supply Voltages | 9V / 12V / 15V / 18V / 24V |
| Target Market | Automotive |
| Package | 32-pin SOIC-EP (exposed pad) |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -40C to +125C (automotive) |
| Diagnostics | Local and bus failure diagnostics, protection, fail-safe handling |
| Watchdog / Reset | Integrated (per family description) |
| RoHS Status | Compliant (per distributor listings) |
MCZ33903C5EK 32-pin soic-ep (exposed pad) Pin Configuration Guide
Pin configuration for MCZ33903C5EK (32-pin soic-ep (exposed pad) package). This power device features gate, drain, and source terminals. For non-polarized packages, refer to the manufacturer datasheet for exact pin 1 orientation and footprint details. Common applications include power supply design, motor driving, and load switching.
No detailed pinout data available for MCZ33903C5EK.
Refer to the datasheet for full pin configuration.
Typical Applications
MCZ33903C5EK is suitable for 6 applications: Automotive Body Control Module (BCM), HVAC Control Module, Instrument Cluster ECU, Automotive Gateway Module, Seat and Mirror Control Module, Heavy-Duty 24V Truck ECU.
Automotive Body Control Module (BCM)
The MCZ33903C5EK is well suited to body control modules that manage lights, door locks, mirrors, and wipers from the 12V automotive bus. Its integrated 5V regulator powers the host MCU and sensor inputs directly, eliminating a discrete LDO on the PCB. The high-speed CAN (ISO 11898-2/-5) interface connects the BCM to the vehicle CAN backbone at up to 1 Mbps, while the LIN bus drives local mirror, seat, and window nodes. Local and bus failure diagnostics let the MCU flag dominant clamping or thermal events without external comparators. The 32-SOIC-EP footprint and exposed pad handle the thermal envelope of a continuously-powered BCM parked on a 12V rail in Normal or Sleep mode.
Recommended
HVAC Control Module
An automotive HVAC control module needs a regulated MCU supply plus a quiet CAN or LIN link to the body controller, and the MCZ33903C5EK supplies both in one package. The integrated 5V LDO drives the HVAC MCU and the small-signal sensor chain (temperature, pressure, blower feedback). The ISO 11898-2/-5 high-speed CAN interface joins the climate module to the vehicle network, with local failure diagnostics supporting fail-safe fan and flap default behaviors. The -40C to +125C automotive temperature range covers under-dash placement in cold-start and high-ambient conditions. Sleep mode current is critical for the parking-mode HVAC recirculation timer; the part supports Normal and Sleep with remote wake-up per ISO 11898-5.
Recommended
Instrument Cluster ECU
The MCZ33903C5EK fits an analog or hybrid instrument cluster that needs clean MCU power and CAN-based message exchange with the powertrain bus. The integrated 5V regulator holds tight tolerance over crank and load-dump transients on the 12V rail, preventing gauge-pointer flutter and warning-lamp flicker. The ISO 11898-2 high-speed CAN receiver pulls ignition, wheel-speed, and fuel-level messages at the 500 kbps typical cluster bitrate. The exposed pad of the 32-SOIC-EP is essential: instrument clusters often run at high ambient inside the dash with limited airflow, and the thermal pad keeps junction temperature inside the -40C to +125C envelope during high-temp soak conditions.
Recommended
Automotive Gateway Module
A CAN-CAN or CAN-LIN gateway module requires multiple high-speed CAN channels and a stable 5V MCU supply, which the MCZ33903C5EK's integrated high-speed CAN (ISO 11898-2/-5) and 5V LDO provide. The gateway typically translates between body CAN (500 kbps) and chassis CAN (1 Mbps), or between CAN and LIN for sub-networks. The SBC's watchdog and reset generation support fail-safe behavior when the gateway MCU is being reflashed or has locked up, with fail-safe state machine falling back to a pre-defined pass-through mode. The 9V-27V supply range covers both 12V passenger vehicles and 24V heavy-duty truck platforms with a single BOM, reducing SKU count.
Recommended
Seat and Mirror Control Module
Seat-control modules often combine high-speed CAN to the body controller with a LIN sub-network for the seat switches and mirror actuators. The MCZ33903C5EK's combined CAN-plus-LIN integration lets a single SBC replace what would otherwise be a discrete LDO plus two transceivers, trimming PCB area and BOM. The 5V regulator drives the seat-position microcontroller, and the LIN interface handles the local keypad and motor-driver slaves. Diagnostic features flag CAN dominant clamping if a seat node fails shorted-to-battery, enhancing functional safety per ISO 26262 at the module level. Sleep and remote wake-up keep the seat controller's quiescent draw low during long vehicle parking.
Recommended
Heavy-Duty 24V Truck ECU
Heavy-duty commercial trucks and buses use 24V battery systems where the MCZ33903C5EK's explicit 24V nominal supply support is a direct fit. The integrated high-speed CAN supports J1939 messaging at 250 or 500 kbps across powertrain, body, and chassis controllers. The 5V LDO supplies the host MCU and any 5V sensor front-ends; load-dump and jump-start transient immunity per ISO 7637 must still be validated against the family datasheet, with TVS protection on the supply input. The 32-SOIC-EP exposed pad dissipates heat effectively in a sealed cab-mounted or chassis-mounted ECU enclosure.
Recommended
Recommended Products Summary
Engineering reference data for MCZ33903C5EK — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MCZ33903C5EK/R2 | MCZ33903CS5EK | MCZ33903DS3EKR2 | MCZ33390EFR2 |
|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 32-SOIC-EP | 32-SOIC-EP (same) | 32-SOIC-EP (same) | 32-SOIC-EP (same) | 32-SOIC-EP (same) |
| Product Family | MC33903 SBC Gen2 | MC33903 SBC Gen2 (same) | MC33903 SBC Gen2 (same) | MC33903 SBC Gen2 (same) | MC33390 SBC Gen1 (older) |
Key Differentiators
- Integrated high-speed CAN (ISO 11898-2/-5) plus LIN plus 5V LDO on one die (vs Discrete LDO + stand-alone CAN/LIN transceivers)
- Wide 9V-27V supply range covering 12V passenger cars and 24V heavy-duty trucks (vs 12V-only SBCs)
- Built-in local and bus failure diagnostics plus fail-safe handling (vs Discrete CAN transceivers without integrated diagnostics)
Design Notes
Bulk and bypass capacitors for the integrated 5V LDO must be placed as close as possible to the regulator pins on the PCB, per the family datasheet. Use a low-ESR ceramic on the high-frequency bypass (100 nF to 1 uF, X7R) and a larger bulk (10 uF or more) for transient load support. The exposed pad of the 32-SOIC-EP must be soldered to a ground copper pour to carry heat away from the die.
Validate load-dump (ISO 7637 pulse 5a/5b) and jump-start (ISO 16750) transient immunity on the supply input - the SBC's integrated regulator has wide 9V-27V operating range but the absolute-maximum ratings and external TVS protection are still mandatory for 24V truck applications. Mis-sized TVS diodes are a common field-failure root cause; check both working voltage and clamping voltage.
CAN bus topology requires a 120 ohm termination at each bus end. The MCZ33903C5EK's integrated transceiver does not include bus termination, so external resistors must be added. Keep the CAN traces short, length-matched within the bus segment, and routed over a continuous ground plane to maintain 1 Mbps signal integrity per ISO 11898-2. The LIN bus, by contrast, is a single-wire slave topology and does not need termination resistors.
Estimated: at a hypothetical 100 mA 5V load from a 12V battery rail, internal dissipation is roughly (12V - 5V) * 0.1A = 0.7 W. For modules with higher MCU current draw or with significant CAN/LIN bus load, verify the junction temperature using the family-datasheet theta_JA value with the actual PCB copper-pour area on the SOIC-EP exposed pad. The 32-SOIC-EP is the same package family soic-32 but on-datasheet theta_JA values must be used rather than estimates.
Compliance Information
RoHS compliance and lead-free status inferred from NXP/Freescale and DigiKey listings. AEC-Q100 qualification is family-level for MC33903 SBC Gen2 per NXP; per-part status and REACH/halogen-free status marked unknown because they were not present in the verified web data.
