MC33742SDWR2

Overview

The MC33742SDWR2 is a System Basis Chip (SBC) integrating an enhanced high-speed CAN transceiver with SPI-controlled power management. It features a fully protected fixed 5.0 V low dropout regulator and a second 5.0 V regulator via external pass transistor. The device supports four operating modes: Normal, Standby, Stop, and Sleep. Key specifications include a 1.0 Mbps CAN bus interface with diagnostic capability, SPI control up to 4.0 MHz, and a programmable window watchdog. It includes four wake-up inputs, interrupt/reset outputs, and a high-side switch output driver for external circuitry control.

Feature Summary

• Integrates a high-speed CAN transceiver with bus diagnostic capabilities
• Features a fully protected 5.0 V low dropout voltage regulator with current limiting and overtemperature prewarning
• Supports multiple low-power operating modes including Standby, Stop, and Sleep
• Includes a programmable window watchdog and interrupt/reset functionality

Applications

• Automotive electronic control units (ECUs)
• Nodes requiring low-power standby modes in high-speed CAN networks
• Industrial applications utilizing isolated communication networks

Procurement Notes

Verify the specific ordering suffix 'SDWR2' against official NXP documentation to confirm package type and temperature range. Ensure compatibility with the required automotive environmental standards and SPI interface timing requirements before procurement.

Selection Notes

Select this component when a combined power management and CAN transceiver solution is required for automotive ECUs. Consider the MC33742S variant if a shorter reset duration of 3.5 ms is needed compared to the standard 15 ms. Evaluate the need for external pass transistors for the secondary regulator.

Part Context

The MC33742 belongs to the SMARTMOS family of system basis chips designed for robust automotive environments. It consolidates frequently used functions into a single package, reducing board space and complexity for microcontroller-based systems requiring reliable CAN communication and regulated power supplies.

Replacement Considerations

The MC33742S is a direct functional alternative with a different reset duration. Verify pinout compatibility and thermal characteristics when substituting between the 28-pin SOICW and 48-pin QFN packages.