MC33689DDWBR2 - SPI SBC with LIN Transceiver, 32-SOIC | NXP
MPN: MC33689DDWBR2 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.42 | $6.42 |
| 10 | $5.78 | $57.80 |
| 100 | $4.95 | $495.00 |
| 500 | $4.1 | $2,050.00 |
| 1,000 | $3.55 | $3,550.00 |
MC33689DDWBR2 Overview
A System Basis Chip (SBC) is a mixed-signal IC that integrates a voltage regulator, communication transceiver, and housekeeping functions (watchdog, reset, fail-safe) into a single package. An SBC sits between the vehicle battery and the microcontroller, providing a clean regulated rail and physical-layer connectivity to in-vehicle networks. The SBC category itself falls within the broader power management hierarchy: SBC -> power management IC -> analog/mixed-signal semiconductor.
Key features include a 5.0 V, 50 mA low-dropout regulator with full protection and reporting features, an SPI interface for configuration and control, a LIN 2.0/2.1 physical-layer transceiver, and integrated fault handling. The 32-SOIC (7.50 mm wide body) package provides adequate thermal headroom for the modest internal dissipation of an SBC.
The device is implemented using NXP's automotive-qualified mixed-signal BiCMOS process and is targeted at body-electronics ECUs. Internal voltage references and current sources are trimmed at wafer level to ensure regulator accuracy across temperature. The integrated LIN transceiver meets the LIN 2.x physical-layer specification with slew-rate control and dominant-timeout protection.
Typical applications include automotive mirror control, power window lift, seat control modules, and other LIN slave nodes in body-electronics networks. Each of these subsystems uses the SBC to provide regulated logic power, microcontroller housekeeping, and a LIN physical-layer interface to the vehicle body controller.
When designing with this device, ensure the LIN bus pull-up resistor matches the master/slave application and respect the absolute maximum ratings on Vbat and the LIN pin. Use the SPI watchdog and reset features to build a proper fail-safe state into the application firmware.
This page synthesizes distributor pricing from DigiKey and Mouser, drop-in same-package alternatives, and practical design notes not aggregated in the manufacturer datasheet alone.
Drop-in alternatives for MC33689DDWBR2 — 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 MC33689DDWBR2 (same form factor and footprint) — differing in Function, Interface, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC33689DWBR2
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.1 / Unit
View Datasheet →MC33689PEFR2
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MC33689CF
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MC33984CHFK
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.09 / Unit
View Datasheet →MC33689DDWBR2 Maximum Ratings & Electrical Characteristics
| Product Type | System Basis Chip (SBC) with LIN Transceiver |
| Interface | SPI (control) + LIN (bus) |
| Supply Voltage (Vbat) | 5.5 V to 18 V |
| Integrated LDO Output | 5.0 V |
| LDO Output Current | 50 mA |
| LIN Specification | LIN 2.0 / 2.1 compliant |
| Package / Case | 32-SOIC (0.295", 7.50 mm width) |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel (TR) |
| Lead Free | Yes (per DigiKey listing) |
| Application | Automotive Mirror Control (primary); also power window, seat control |
| LIN Bus Topology | Slave |
| Watchdog / Reset | Yes (SPI-controlled) |
MC33689DDWBR2 32-soic (0.295", 7.50 mm width) Pin Configuration Guide
Pin configuration for MC33689DDWBR2 (32-soic (0.295", 7.50 mm width) 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 MC33689DDWBR2.
Refer to the datasheet for full pin configuration.
Typical Applications
MC33689DDWBR2 is suitable for 6 applications: Automotive Power Mirror Control, Power Window Lift Module, Power Seat Control Module, Door Module Module, Body Controller LIN Slave, Automotive Sunroof / Convertible Top Module.
Automotive Power Mirror Control
The MC33689DDWBR2's 5.0 V/50 mA integrated LDO, SPI control, and LIN 2.x physical layer map directly to automotive power mirror modules. According to the NXP datasheet, mirror adjustment ECUs combine an SBC + dual half-bridge driver to position mirrors; the MC33689 supplies the MCU rail, monitors faults through SPI, and links to the body controller over LIN at up to 20 kbit/s. The wide-body 32-SOIC package fits the small PCB of a mirror module and shares thermal headroom with the adjacent driver IC. Cross-brand design: a sibling NXP SBC in the same 32-SOIC footprint can be dropped in if a different feature set or higher LDO current is required without re-laying out the PCB.
Recommended
Power Window Lift Module
Power window ECUs use an SBC for power, bus interface, and diagnostics plus an external half-bridge driver for the window motor. The MC33689DDWBR's LIN 2.x transceiver communicates lift up/down requests from switches and the body controller. According to the NXP datasheet, the SBC's watchdog and reset regulators ensure the host MCU starts in a defined state; the SPI status flags report LIN bus faults, regulator dropouts, and overtemperature to the MCU for fail-safe window stop. The 32-SOIC wide-body dissipates the modest SBC power comfortably. Cross-brand design: pin-compatible NXP SBCs and TLE family LIN SBCs from Infineon in 32-SOIC can serve as second sources once SPI register compatibility is verified.
Recommended
Power Seat Control Module
Power seat ECUs integrate an SBC + multiple half-bridge drivers to actuate seat motors for recline, slide, and height. The MC33689DDWBR2 supplies the host MCU rail at 5.0 V/50 mA, communicates seat position requests over LIN 2.x, and reports faults via SPI. According to the NXP datasheet, the integrated LDO's thermal shutdown and current limit protect the SBC and the MCU rail during motor stall events. The 32-SOIC wide-body package supports the multiple-decade bus current that the SBC sees during normal seat motion. Cross-brand design: drop in another NXP 32-SOIC SBC if higher LDO current is needed for more complex seat ECUs.
Recommended
Door Module Module
Integrated door modules combine window, mirror, lock, and lighting control on one ECU. The MC33689DDWBR2's combination of regulated 5.0 V, SPI, and LIN makes it a fit for the master door module that fans out to local sub-modules. According to the NXP datasheet, the SBC's SPI interface serves the host MCU for register access, while the LIN interface links the door module to the body controller. The 50 mA LDO current is sufficient for the door MCU; additional rails for higher-current loads come from external regulators. Cross-brand design: an NXP 32-SOIC pin-compatible variant with higher LDO current scales the door module without PCB change.
Recommended
Body Controller LIN Slave
In a hierarchical body network, the MC33689DDWBR2 sits at the leaf as a LIN slave receiving commands from a master body controller over the LIN 2.x bus. The SPI control plane lets the local MCU poll register sets for bus errors, regulator status, and thermal warnings, then act on them via fail-safe firmware paths. According to the NXP datasheet, the integrated dominant-timeout prevents a single stuck slave from holding the LIN bus, preserving master communication with other nodes. Cross-brand design: TLE7263 from Infineon in 32-SOIC footprint serves as a cross-brand second source once SPI/LIN behavior is validated.
Recommended
Automotive Sunroof / Convertible Top Module
Sunroof and convertible top modules need SBC + half-bridge for the drive motor plus LIN to the body controller. The MC33689DDWBR2 supplies 5.0 V at 50 mA to the host MCU, handles the LIN 2.x command interface, and reports fault status through SPI registers. According to the NXP datasheet, the SBC's thermal shutdown and current limit support robust operation during stalled-motor events where the supply rail can dip. The 32-SOIC wide-body dissipates the SBC power with margin. Cross-brand design: choose an NXP 32-SOIC pin-compatible variant if a wider temperature grade is required for under-hood-mounted sunroof modules.
Recommended
Recommended Products Summary
Engineering reference data for MC33689DDWBR2 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC33689DWBR2 | MC33689PEFR2 | MC33689CF | MC33984CHFK |
|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 32-SOIC (7.50 mm wide body) | 32-SOIC (7.50 mm wide body) - same | 32-SOIC (7.50 mm wide body) - same | 32-SOIC (7.50 mm wide body) - same | 32-SOIC (7.50 mm wide body) - same |
| Product Type | SBC with LIN Transceiver | SBC with LIN Transceiver | SBC with LIN Transceiver | SBC with LIN Transceiver | Dual High-Side Switch |
| Supply Voltage | 5.5 V to 18 V | 5.5 V to 18 V | 5.5 V to 18 V | 5.5 V to 18 V | 8 V to 27 V |
| Integrated LDO Output | 5.0 V / 50 mA | 5.0 V / 50 mA | 5.0 V / 50 mA | 5.0 V / 50 mA | None (high-side switch) |
| Communication Interface | SPI + LIN 2.0/2.1 | SPI + LIN 2.0/2.1 | SPI + LIN 2.0/2.1 | SPI + LIN 2.0/2.1 | SPI (control only) |
| Primary Application | Mirror / window / seat LIN slave | Mirror / window / seat LIN slave | Mirror / window / seat LIN slave | Mirror / window / seat LIN slave | Lighting / general purpose load |
| Approx. Unit Price (USD, qty-1000) | 3.55 | 3.55 | 4.10 | 4.25 | 3.90 |
Key Differentiators
- Integration of LDO + LIN transceiver + SPI in a single 32-SOIC (vs MC33984CHFK)
- Wide 5.5 V to 18 V Vbat operating range (vs MC33984CHFK (8 V to 27 V))
- Automotive-grade LIN 2.x physical layer (vs Generic LIN SBCs)
Design Notes
The MC33689DDWBR2 integrates a 5.0 V / 50 mA LDO sourced from Vbat (5.5 V to 18 V). Estimate: at worst-case Vbat=18 V, the LDO drops 13 V at 50 mA = 650 mW internal dissipation. The wide-body 32-SOIC has theta_JA around 60-70 C/W on a 1 sq inch 2-layer copper pour, giving a junction rise of ~40-45 C above ambient - well within thermal limits. For higher-current host rails, use an external LDO or DC-DC instead of relying on the integrated 50 mA regulator.
Do not connect Vbat above 18 V sustained; the absolute maximum on Vbat is documented in the datasheet and exceeded only briefly under load-dump if external TVS protection is present. Place a reverse-battery and load-dump protection network ahead of the Vbat pin. The LIN bus pin needs an external master/slave pull-up; absence of the pull-up causes the bus to float and fail the physical-layer conformance check. Respect the SPI logic-level compatibility with the host MCU; the datasheet defines the VIH/VIL thresholds.
Place the Vbat bypass capacitor (typically 100 nF ceramic plus 10 uF bulk) as close as possible to the Vbat pin to handle LIN bus switching transients. Keep the LIN bus trace short and away from sensitive analog or RF traces to minimize EMI. The exposed pad (if used in this variant) should be soldered to a ground copper pour for thermal relief. Route SPI traces (SCLK, MOSI, MISO, INT) away from the LIN trace to avoid digital-noise coupling.
Compliance Information
Lead Free per DigiKey listing. AEC-Q100 qualification assumed for automotive targeting but specific grade [DATA_NEEDED] from NXP datasheet. RoHS/REACH compliance flags [DATA_NEEDED] from official NXP declaration.
