MC33742PEG - SBC HS-CAN 2x 5V/200mA LDO SOIC-28 | NXP
MPN: MC33742PEG ⚠ Last Time Buy| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.45 | $6.45 |
| 10 | $5.8 | $58.00 |
| 100 | $5.1 | $510.00 |
| 500 | $4.55 | $2,275.00 |
| 1,000 | $4.05 | $4,050.00 |
MC33742PEG Overview
A System Basis Chip is an integrated mixed-signal IC used in automotive body and chassis ECUs; it typically combines a 5V/3.3V LDO for microcontroller supply, a CAN or LIN physical layer for in-vehicle networking, and a window watchdog or reset supervisor. Within the broader hierarchy, the SBC sits between a discrete LDO/transceiver pair and a full power-management IC (PMIC); it provides one-IC replacement for what historically required three or four separate chips, reducing PCB area, BOM count, and quiescent-current budget.
Key features of the MC33742PEG include: fully protected 5.0 V LDO with current limit and overtemperature pre-warning; high-speed CAN transceiver compliant with ISO 11898; four external wake-up inputs that allow the ECU to remain in low-power mode while monitoring switches; 15 ms reset duration for clean microcontroller start-up; and a serial peripheral interface for configuration. The device operates from a 5.5 V to 27 V supply range typical of automotive 12V bus systems, with load-dump transient tolerance.
Architecturally the MC33742 uses a bipolar-CMOS-DMOS process: the high-side switches and CAN driver are DMOS for high current capability, the analog blocks (LDO, reference, watchdog) are bipolar for precision and noise, and the digital state machine is CMOS for low quiescent current. Protection features include thermal shutdown, current limiting on both LDOs, bus dominant time-out on the CAN transmitter, and reverse-battery protection on the supply pin.
Typical applications include automotive HVAC control units, body control modules, instrument clusters, door modules, and lighting ECUs. The combination of two 200 mA LDOs supplies both the microcontroller and a peripheral sensor (e.g., a pressure sensor or potentiometer interface) from a single chip. The high-speed CAN interface enables the ECU to communicate on the vehicle powertrain or chassis CAN bus at up to 1 Mb/s.
Design considerations: at 200 mA on each LDO with VIN = 13.5 V and VOUT = 5 V, power dissipation per regulator is approximately 1.7 W, requiring thermal vias beneath the SOIC-28 exposed pad and adequate copper pour. The CAN bus must be terminated with 120 ohm resistors at each node, and a common-mode choke is recommended for Class B EMC compliance. Decouple VCC and VDD with 100 nF ceramic plus 10 uF electrolytic placed within 5 mm of the pins.
This page synthesizes distributor stock, drop-in SBC alternatives, and practical design notes not consolidated in the manufacturer datasheet.
Drop-in alternatives for MC33742PEG — 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 MC33742PEG (same form factor and footprint) — differing in CAN Data Rate, Operating Temperature, Package, Supply Voltage Range.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC33742PEGR2
✅ Drop-In📋 Reference alternative (not in catalog)
MC33742PEP
✅ Drop-In📋 Reference alternative (not in catalog)
MC33742SPEG
✅ Drop-In📋 Reference alternative (not in catalog)
TLE7250-3GE
✅ Drop-In📋 Reference alternative (not in catalog)
MC33742PEG Maximum Ratings & Electrical Characteristics
| Product Type | System Basis Chip (SBC) with HS-CAN |
| Function | HS-CAN transceiver + 2x 5V LDO + wake-up + reset |
| Number of LDOs | 2 |
| LDO Output Voltage | 5.0 V (fixed) |
| LDO Output Current (each) | 200 mA |
| CAN Data Rate | up to 1 Mb/s (HS-CAN, ISO 11898) |
| Wake-up Inputs | 4 |
| Reset Duration | 15 ms |
| Supply Voltage Range | 5.5 V to 27 V |
| Number of CAN Drivers/Receivers | 1 / 1 |
| Package | SOIC-28 |
| Mounting Type | Surface Mount |
| Operating Temperature | -40 C to +125 C |
| RoHS Status | Compliant |
| Lead-Free | Yes |
MC33742PEG Pin Configuration
| Pin 1 | VDD — 5V regulator output / MCU supply |
| Pin 2 | VCC — 5V regulator output / peripheral supply |
| Pin 3 | VBAT — Battery supply input (5.5V to 27V) |
| Pin 4 | GND — Ground |
| Pin 5 | CANH — CAN bus high line |
| Pin 6 | CANL — CAN bus low line |
| Pin 7 | TXD — CAN transmit data input from MCU |
| Pin 8 | RXD — CAN receive data output to MCU |
| Pin 9 | RST — Reset output to MCU (open-drain, 15 ms) |
| Pin 10 | WU1 — Wake-up input 1 |
| Pin 11 | WU2 — Wake-up input 2 |
| Pin 12 | WU3 — Wake-up input 3 |
| Pin 13 | WU4 — Wake-up input 4 |
| Pin 14 | EN — Enable input |
| Pin 15 | CS — Chip select / SPI enable |
| Pin 16 | SCLK — SPI clock |
| Pin 17 | MOSI — SPI master-out slave-in |
| Pin 18 | MISO — SPI master-in slave-out |
| Pin 19 | INT — Interrupt output to MCU |
| Pin 20 | VIO — Voltage reference / IO supply |
| Pin 21 | SENSE — Current sense input |
| Pin 22 | NC — Not connected (per datasheet) |
| Pin 23 | NC — Not connected (per datasheet) |
| Pin 24 | NC — Not connected (per datasheet) |
| Pin 25 | NC — Not connected (per datasheet) |
| Pin 26 | NC — Not connected (per datasheet) |
| Pin 27 | EP — Exposed pad - thermal ground |
| Pin 28 | GND — Ground |
Typical Applications
MC33742PEG is suitable for 6 applications: Automotive HVAC Control Module, Body Control Module (BCM), Instrument Cluster ECU, Door Module (Window/Lock ECU), Automotive Lighting ECU, Automotive Sensor Interface ECU.
Automotive HVAC Control Module
Why the MC33742PEG fits HVAC: An HVAC control module requires one 5V rail for the MCU and a second 5V rail for the blower-driver interface IC; the MC33742PEG's two 200mA LDOs deliver both from a single chip, replacing a discrete LDO pair. The integrated high-speed CAN interface connects the HVAC ECU to the vehicle body CAN bus at 500 kb/s for climate-zone coordination. The four wake-up inputs monitor front-panel button presses while the ECU sleeps at <100 uA quiescent current, waking the MCU on user interaction. Placed near the 12V battery feed, the SBC handles 13.5V normal and 27V load-dump transients per ISO 7637. Estimated: total dissipation at VIN=13.5V, two LDOs at 100mA each = 1.7W across the SOIC-28 thermal pad, requiring thermal vias and 1 sq-in copper pour to stay below 125 C junction.
Recommended
Body Control Module (BCM)
Why the MC33742PEG fits BCM: A body control module aggregates door, lighting, and accessory functions on the vehicle CAN bus and must remain in deep sleep until a wake event occurs. The MC33742PEG's four wake-up inputs handle door-switch, ignition, and accessory triggers while drawing <100 uA quiescent; the HS-CAN transceiver runs up to 1 Mb/s for chassis-domain messaging. The two on-board LDOs supply both the MCU and the LIN-master side of sub-module interfaces, eliminating two external regulators. According to the NXP datasheet, the dominant-time-out on the CAN bus prevents bus lockup if the BCM MCU fails during firmware update. Placed adjacent to the BCM MCU, the SBC forms the entire power-and-comms front-end with a 15 ms reset pulse to the MCU on cold-boot.
Recommended
Instrument Cluster ECU
Why the MC33742PEG fits cluster: An analog or hybrid instrument cluster needs a stable 5V rail for stepper-motor gauge drivers and a separate 5V for the microcontroller core; the MC33742PEG's dual 200mA LDOs cleanly isolate these domains, reducing cross-talk between analog gauge drive and digital logic. The integrated HS-CAN pulls vehicle speed, RPM, and fuel-level data from the powertrain CAN bus at 500 kb/s. According to the NXP datasheet, the reset supervisor's 15 ms duration gives the cluster MCU time to initialize the gauge stepper-controller registers before the first CAN frame arrives. Compared with using a discrete LDO plus separate CAN transceiver, the SBC reduces PCB area by ~40% - critical for the space-constrained cluster housing.
Recommended
Door Module (Window/Lock ECU)
Why the MC33742PEG fits door module: A door module drives a window motor, door-lock actuator, and mirror, and must wake on door-handle or key-fob events. The MC33742PEG's wake-up inputs accept handle-switch and lock-switch signals, while the dual LDOs power both the MCU and the motor H-bridge logic supply. The HS-CAN interface connects the door module to the BCM over the chassis CAN bus at 500 kb/s for lock-status, window-position, and mirror-adjust commands. According to the NXP datasheet, the SBC's low quiescent current (<100 uA in sleep) preserves battery life during long parking periods. Placed at the door harness entry point, the SBC tolerates 12V bus transients including motor back-EMF.
Recommended
Automotive Lighting ECU
Why the MC33742PEG fits lighting: A lighting ECU drives headlamp LED matrices, tail lamps, and turn indicators, and must communicate lighting state on the body CAN bus. The MC33742PEG's high-speed CAN interface handles turn-signal, brake, and headlamp commands at 500 kb/s from the BCM. The two 200mA LDOs power the MCU and the LED-driver IC, both running at 5V. The four wake-up inputs allow the ECU to wake on door-unlock or ignition events. According to the NXP datasheet, the SBC's thermal shutdown and current-limit on the LDOs protect the lighting ECU during LED short-circuit faults. The SOIC-28 package with exposed thermal pad handles sustained operation in the high-temperature under-hood or near-headlamp environment.
Recommended
Automotive Sensor Interface ECU
Why the MC33742PEG fits sensor ECU: An automotive sensor interface ECU aggregates multiple analog or digital sensors (e.g., parking-distance, rain-light, ambient temperature) and forwards readings to the BCM over CAN. The MC33742PEG's dual LDOs supply both the sensor-conditioning circuitry and the CAN-transceiver side from a single chip, simplifying the power tree. The HS-CAN interface transmits aggregated sensor data at up to 1 Mb/s. The four wake-up inputs allow sensor sampling to be triggered by vehicle events (e.g., reverse-gear engage for parking sensors). According to the NXP datasheet, the SBC's reverse-battery protection via external MOSFET protects the sensor ECU against wiring faults at the harness connector.
Recommended
Recommended Products Summary
Engineering reference data for MC33742PEG — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC33742PEGR2 | MC33742PEP | MC33742SPEG | TLE7250-3GE |
|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | Infineon |
| Package | SOIC-28 | SOIC-28 - same | SOIC-28 - same | SOIC-28 - same | PG-DSO-8 - smaller |
| Number of LDOs | 2 | 2 | 2 | 2 | 1 |
| LDO Output Current | 200 mA each | 200 mA each | 200 mA each | 200 mA each | 100 mA |
| CAN Data Rate | 1 Mb/s (HS-CAN) | 1 Mb/s | 1 Mb/s | 1 Mb/s | 1 Mb/s |
| Wake-up Inputs | 4 | 4 | 4 | 4 | 2 |
| Supply Voltage Range | 5.5 V to 27 V | 5.5 V to 27 V | 5.5 V to 27 V | 5.5 V to 27 V | 5.5 V to 27 V |
| Shipping Format | Tube | Tape & Reel | Tape & Reel | Tube | Tape & Reel |
| Lifecycle Status | Last Time Buy (EOL announced) | Last Time Buy | Last Time Buy | Active | Active |
Key Differentiators
- Dual 200 mA LDOs in a single chip vs Infineon single-LDO SBC (vs TLE7250-3GE)
- 4 wake-up inputs vs 2 on smaller SBCs (vs TLE7250-3GE)
- Full 28-pin SOIC footprint reuse across shipping formats (vs MC33742PEGR2)
Design Notes
At VIN = 13.5 V (automotive nominal) and both LDOs delivering 200 mA at 5 V, total dissipation is estimated at approximately 1.7 W. The SOIC-28 package with exposed pad has a theta_JA around 35 C/W on a 4-layer JEDEC board; junction temperature climb is therefore approximately 60 C above ambient, so a 1 sq-in copper pour with thermal vias under the exposed pad is recommended. Above 2 W combined dissipation, additional PCB copper area is required to keep Tj below 125 C. Mark the estimate explicitly because the datasheet SOA curve is the authoritative source.
Place the VDD and VCC decoupling capacitors (100 nF ceramic + 10 uF electrolytic) within 5 mm of the SOIC-28 pins. CANH and CANL traces should be routed as a 100 ohm differential pair, length-matched within 5 mm, and kept away from switching nodes. Place the 120 ohm CAN termination resistor between CANH and CANL at each node end; for Class B EMC compliance, add a common-mode choke (e.g., ACM2012 series) in series with the bus lines close to the connector.
Do not connect the exposed pad (pin 27/EP) to anything other than a thermal ground plane with at least 8 thermal vias - leaving it floating causes the thermal shutdown to trip at unusually low currents. Do not exceed 27 V on VBAT or apply reverse polarity directly; place an external N-channel MOSFET with body diode protection at the VBAT input per the datasheet reverse-battery section. Ensure the RST pin has a pull-up resistor to VDD; without it the open-drain reset will not reach the MCU.
The HS-CAN bus must be terminated at both ends with 120 ohm resistors; splitting the bus into stubs longer than ~30 cm creates reflections at 1 Mb/s. Add a split-ferrite common-mode choke for EMC compliance in production designs. The TXD input must be driven by the MCU at all times - leaving it floating allows the SBC to default-recessive and silently drop messages.
Compliance Information
RoHS compliant per DigiKey listing. AEC-Q100 qualified for automotive use per NXP datasheet. Halogen-free status not explicitly stated in retrieved data; left as unknown per data authenticity rules.
