MC33742DWR2 - SBC with HS-CAN Transceiver, SPI | NXP
MPN： MC33742DWR2 ✓ 啟用中MC33742DWR2 概覽
A System Basis Chip (SBC) is a multi-function automotive power-and-interface IC that consolidates a voltage regulator, CAN/LIN transceivers, watchdog, and SPI control into a single package - reducing PCB area in body, chassis, and powertrain ECUs versus discrete implementations. Architecturally the MC33742DWR2 sits between a discrete 5V regulator plus separate CAN transceiver and a full MCU integration, providing the regulator, bus driver, and housekeeping functions while leaving the host microcontroller external.
Key features include 1 Mbps CAN bus interface with bus diagnostics, SPI control at frequencies up to 4.0 MHz, a 5.0 V fixed LDO with current limiting, over-temperature prewarning and reset, plus an auxiliary regulator through an external pass element. The device is designed to operate in automotive -40C to +125C ambient, supports wake-up via CAN bus or external signal, and provides protected bus pins tolerant to -27 V to +40 V.
Typical applications include automotive body control modules, HVAC and instrument-cluster ECUs, door/seat/lighting modules, CAN node power conditioning, and industrial CAN-based distributed I/O. The 1 Mbps bus speed and integrated diagnostics suit on-vehicle networks requiring real-time fault reporting.
When designing with this device, bypass the internal regulator with low-ESR ceramic and bulk capacitors sized for the load step, and keep the CAN bus stubs short to meet ISO 11898 signal-integrity margins. A series resistor on the bus may be needed to limit slew rate in non-isolated test setups.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that are not consolidated on the manufacturer datasheet, including cross-brand options and AEO-optimized selection guidance for engineers.
直接替換替代品，適用於 MC33742DWR2 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
MC33742PEFR2
✅ 直接替換📋 參考替代品（不在目錄中）
MC33742SEFR2
✅ 直接替換📋 參考替代品（不在目錄中）
MC33742DW
✅ 直接替換📋 參考替代品（不在目錄中）
MC33742DWR2 規格
| 功能 | System Basis Chip (SBC) with Enhanced High-Speed CAN Transceiver |
| CAN Standard | CAN 2.0 compliant, ISO 11898-2/5 |
| CAN Bus Speed | 1 Mbps (maximum) |
| Internal Regulator Output | 5.0 V fixed LDO |
| Internal Regulator Protection | Current limiting, over-temperature prewarning, reset |
| Auxiliary Regulator | External pass-transistor (second rail capability) |
| SPI Control Frequency | Up to 4.0 MHz |
| Bus Diagnostics | Bus-dominant timeout, thermal shutdown, bus failure detection |
| 工作溫度範圍 | -40C to +125C (automotive) |
| 封裝 | 28-pin SOIC (DW), wide-body |
| 安裝類型 | Surface Mount |
| MSL 等級 | 3 (168 hours) |
| RoHS 狀態 | Compliant |
| Bus Fault Tolerance | -27 V to +40 V on CAN bus pins |
| Wake-up Sources | CAN bus wake, external wake |
MC33742DWR2 腳位配置
| 腳位 1 | L1 — Internal 5.0V LDO output / regulator pin |
| 腳位 2 | GND — Ground |
| 腳位 3 | VCC — Internal 5.0V LDO output |
| 腳位 4 | VCC5V — 5V supply input / output sense |
| 腳位 5 | VSUP — Battery supply input (12V typical) |
| 腳位 6 | VPWR — External pass-transistor driver base |
| 腳位 7 | WAKE — Wake-up input |
| 腳位 8 | INT — Interrupt output to MCU |
| 腳位 9 | RST — Reset output for host MCU |
| 腳位 10 | CS — SPI chip select input |
| 腳位 11 | SCLK — SPI clock input |
| 腳位 12 | MOSI — SPI data input |
| 腳位 13 | MISO — SPI data output |
| 腳位 14 | TXDC — CAN transmit data input from MCU |
| 腳位 15 | RXDC — CAN receive data output to MCU |
| 腳位 16 | CANL — CAN bus low line |
| 腳位 17 | CANH — CAN bus high line |
| 腳位 18 | SPLIT — CAN bus split termination reference |
| 腳位 19 | TXD — CAN TX (data from MCU) |
| 腳位 20 | RXD — CAN RX (data to MCU) |
| 腳位 21 | EN — Enable input |
| 腳位 22 | TEST — Test mode (per datasheet) |
| 腳位 23 | NC — Not connected (per datasheet) |
| 腳位 24 | NC — Not connected (per datasheet) |
| 腳位 25 | NC — Not connected (per datasheet) |
| 腳位 26 | NC — Not connected (per datasheet) |
| 腳位 27 | NC — Not connected (per datasheet) |
| 腳位 28 | NC — Not connected (per datasheet) |
典型應用
MC33742DWR2 適用於 6 應用s: Automotive Body Control Module, Instrument Cluster and HVAC ECU, Lighting Control Module (CAN Connected), CAN-Based Industrial Distributed I/O, Electric Vehicle Charger Auxiliary Circuit, Automotive Gateway Telematics.
Automotive Body Control Module
The MC33742DWR2's integrated 5.0 V LDO + 1 Mbps HS-CAN transceiver makes it ideal for body control modules consolidating door/lamp/wiper functions. Power dissipation benefits: the internal LDO with current-limiting and over-temperature pre-warning supplies the host MCU at 5.0 V without an external regulator, freeing PCB area; CAN bus diagnostics via SPI deliver bus-failure telemetry to the BCM host. Placed between the 12 V battery rail (subject to load-dump transients) and the CAN bus, the same chip supplies MCU power and CAN physical layer - reducing BOM count by ~2 components vs discrete implementations.
推薦
Instrument Cluster and HVAC ECU
Cluster and HVAC ECUs require reliable 5 V analog supply for gauge drivers plus CAN connectivity to powertrain/CAN bus - the MC33742DWR2's 5.0 V fixed LDO with reset and the auxiliary external pass-transistor regulator address both rails from one SBC. Quiescent-current and SPI programmable wake-up support periodic cluster operation without keeping the battery awake. Compared with a discrete regulator + isolated CAN transceiver, the MC33742DWR2 saves roughly 1.5 cm² of PCB and reduces BOM count for cost-sensitive cluster programs.
推薦
Lighting Control Module (CAN Connected)
Front/rear lighting modules need CAN connectivity and a 5 V rail for LED driver microcontrollers; the MC33742DWR2 provides both plus bus-failure diagnostics required for OEM return-material authorization analysis. Its -27 V to +40 V bus fault tolerance endures double-battery jump-start transients common in body-electronics lighting harnesses. SPI programmability supports per-module dimming/sequencing firmware without changing firmware between model variants.
推薦
CAN-Based Industrial Distributed I/O
Industrial CANopen slave modules require robust 24 V supply tolerance and CAN-bus protection - the MC33742DWR2's protected bus pins and SPI diagnostics map directly to industrial fieldbus applications. The auxiliary regulator drives an external pass-transistor for the higher-current 3.3 V rail needed by digital isolators, supplying both rails from a single SBC. Designs that previously required a discrete CAN transceiver plus separate DC-DC may consolidate into one MC33742DWR2 + one external PNP, reducing parts count by approximately 30 percent.
推薦
Electric Vehicle Charger Auxiliary Circuit
EV charger stations require CAN connectivity to the vehicle ECU plus CAN-based diagnostics, and the MC33742DWR2 integrates both the 5 V host supply and the bus interface. The auxiliary external-pass regulator supplies the relay-driver coils needed for HV isolation contactors, reducing cost vs. dedicated DC-DC converters. Combined protection (-27 V to +40 V bus) lets the SBC survive the harsh switching environment of an EVSE HV/LV boundary.
推薦
Automotive Gateway Telematics
Telematics gateways aggregate CAN traffic between powertrain/CAN body networks; the MC33742DWR2's 1 Mbps CAN support, SPI control, and SBC diagnostics provide the bridge physical layer with companion NXP SBCs for CAN-FD/LIN trunks. Its 5.0 V LDO + aux regulator supports the gateway MCU and cellular modem coexistence rails from a single chip. Compared with the legacy MC33742PEFR2, the SOIC wide-body package offers improved handling for high-volume refurbishment flows.
推薦
推薦產品摘要
工程參考資料，適用於 MC33742DWR2 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | MC33742PEFR2 | MC33742SEFR2 | MC33742DW |
|---|---|---|---|---|
| Package | 28-SOIC (DW) | 28-SOIC Power-Edge (PEP) | 28-SOIC Power-Edge (PEP) | 28-SOIC (DW) |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Function | SBC-E-HS + 5V LDO | SBC-E-HS + 5V LDO | SBC-E-HS + 5V LDO | SBC-E-HS + 5V LDO |
| CAN Bus Speed | 1 Mbps | 1 Mbps | 1 Mbps | 1 Mbps |
| Internal Regulator | 5.0V fixed LDO | 5.0V fixed LDO | 5.0V fixed LDO | 5.0V fixed LDO |
| SPI Frequency | 4.0 MHz max | 4.0 MHz max | 4.0 MHz max | 4.0 MHz max |
| Bus Fault Tolerance | -27V to +40V | -27V to +40V | -27V to +40V | -27V to +40V |
| Operating Temperature | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C |
| Carrier Packaging | Tape & Reel (R2) | Tape & Reel (R2) | Tape & Reel (R2) | Tube / Tray |
主要差異化特點
- Single 5V LDO + external pass-transistor driver in one chip (對比Discrete 5V regulator + isolated CAN transceiver (e.g. TLE4275 + TJA1042))
- SPI programmable diagnostic reporting for bus faults (對比TJA1057 standalone CAN transceiver)
- Automotive -27V to +40V bus fault tolerance built in (對比MC33901 SBC)
設計說明
Estimated: At VSUP=12V, VCC=5V, and a 100 mA MCU load, the internal LDO dissipates approximately 0.7W. With the 28-pin SOIC DW package typical theta_JA around 50 C/W, junction temperature rise is roughly 35C above ambient - acceptable for automotive under-hood 85C ambient conditions. Decouple VSUP close to the pin with a 47uF bulk + 100nF ceramic to survive load-dump and cold-crank transients per OEM fault injection. The auxiliary external pass transistor (driven by VPWR pin) should be sized for total current beyond the internal LDO budget - verify its safe-operating area on second-source PNP datasheets.
Route CANH/CANL as a differential pair with 120-ohm characteristic impedance and minimize stub length from the bus to the device pins. Place the split-termination capacitor (typically 4.7 nF series per ISO 11898) close to the SPLIT pin and CANH/CANL termination resistors (60-ohm split is acceptable). Keep regulator output capacitors within 5 mm of VCC/L1 to maintain stability margin during load transients. The exposed thermal pad on the PEP variant must be soldered to a 1 square inch copper pour to extract full SBC-E-HS thermal budget.
Do not exceed -27V to +40V on CANH/CANL even though the SBC has internal protection. The 3-wire WAKEx/INT circuits require pull-up/pull-down resistors to the host MCU rails - floating the wake pin causes phantom wake events. Avoid sequencing SPI writes during the device reset window (RST low) - wait for RST to release before initiating SPI frames. When migrating from MC33742 to MC33742S, re-validate register map for SPI commands flagged as 'reserved' on the legacy part to avoid undefined-state reactions.
合規資訊
RoHS compliant per NXP material declaration. AEC-Q100 qualified per automotive SBC product family classification. Halogen-free status varies by assembly site; request latest supplier materials report.
