NXP Semiconductors MC33889DWR2

Overview

MC33889DWR2 from NXP Semiconductors is a system basis chip (SBC) integrating a 5.0 V LDO regulator (200 mA), low-speed fault-tolerant CAN transceiver (125 kbps), programmable watchdog, SPI interface, dual wake-up inputs, and an internally switched high-side power switch (HS1). It operates across -40°C to 125°C in 28-pin SOICW package and serves as central power management and communication hub for automotive microcontroller modules.

For engineers reviewing the MC33889DWR2 datasheet, MC33889DWR2 pinout, MC33889DWR2 application, or MC33889DWR2 equivalent, this page delivers verified electrical specs, mode-dependent current consumption (e.g., 55–90 μA in Sleep2), CAN threshold differences vs. MC33889B, HS1 R_DS(on) at 125°C, and real-world wake-up timing (t_WAKE = 8–30 μs).

Technical Context

The MC33889DWR2 implements a SMARTMOS-based architecture with four operational modes (Normal, Standby, Stop, Sleep), each with distinct supply current profiles and functional availability - e.g., oscillator active only in Normal/Standby/Stop1/Stop3, disabled in Sleep2. Its CAN transceiver complies with ISO 11898-3 for fault-tolerant low-speed networks and features dedicated TermVbat mode with CANL/CANH single-ended wake-up detection (V_WAKE,H = 1.2–2.7 V, V_WAKE,L = 2.5–3.9 V).

It includes dual regulated outputs: VDD1 (5.0 V ±2%, 200 mA) with overtemperature prewarning (130°C) and shutdown (160–190°C), and V2 (tracking regulator controlled via V2CTRL) supporting external PNP ballast transistor for flexible peripheral voltage/current delivery. SPI control enables register-level configuration of watchdog periods (WD1–WD4), cyclic sense timing (CSFWU1–CSFWU8), and mode transitions.

Key Specifications

Pinout & Package

MC33889DWR2 uses a 28-pin SOICW (wide-body) plastic package with exposed thermal pad (R_THJ/P = 20°C/W), rated for -40°C to 125°C ambient operation and compatible with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar system basis chip applications.

Compared with MC33889BPEG, MC33889DWR2 offers higher CANH drive (100 mA vs. 75 mA typ), tighter differential threshold (3.5 V min), and guaranteed 25 μs SPI timing - making it preferred for noise-prone or high-reliability automotive nodes. Versus TCANI2G, MC33889DWR2 reduces component count by integrating power, communication, and control in one die.

Availability

MC33889DWR2 is available at Aetrix Electronics and suitable for automotive body electronics, door modules, seat control units, and roof systems requiring stable component supply, AEC-Q100 qualification, and long-term production continuity.

Supply support for MC33889DWR2 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

NXP Semiconductors is a global semiconductor leader specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with broad portfolio of automotive-grade analog and mixed-signal ICs.

The MC33889DWR2 belongs to NXP's System Basis Chip product line, designed specifically to consolidate power regulation, communication interface, and system supervision functions into a single IC for automotive microcontroller subsystems.

FAQ

What is the maximum continuous supply voltage for MC33889DWR2?

The MC33889DWR2 supports a continuous VSUP voltage range of 4.5 V to 27 V. It tolerates transient load-dump conditions up to 40 V and jump-start events up to 27 V, meeting ISO 7637-2 Pulse 5a requirements. Operation within 5.5–18 V is nominal; 4.5–5.5 V enables reduced functionality, and 18–27 V maintains full feature availability including CAN and watchdog operation.

How does MC33889DWR2 differ from MC33889BPEG in CAN receiver performance?

The MC33889DWR2 has stricter CAN differential receiver thresholds: V_DIFF1 (recessive-to-dominant) minimum is 3.5 V versus 3.2 V for MC33889BPEG, and V_DIFF2 (dominant-to-recessive) minimum is also 3.5 V. Additionally, MC33889DWR2 specifies t_2SPI = 25 μs for inter-SPI message timing - a requirement absent in the B version - ensuring deterministic register access in time-critical firmware.

What is the purpose of the V2CTRL and V2 pins on MC33889DWR2?

V2CTRL is an output that drives the base of an external PNP transistor to implement a tracking regulator; V2 is the emitter output of that transistor, delivering a voltage closely matching VDD1 (e.g., 5.0 V) or scaled via external resistors. This allows MC33889DWR2 to power peripherals independently of the MCU supply while maintaining tight regulation and current capability up to 200 mA depending on the external transistor.

Can MC33889DWR2 wake up from Sleep mode using CAN bus activity alone?

Yes - MC33889DWR2 supports TermVbat mode, which enables wake-up from Sleep or Stop modes using dominant pulses on CANL or CANH even when VSUP is disconnected. The wake-up threshold is V_WAKE,H = 1.2–2.7 V on CANH and V_WAKE,L = 2.5–3.9 V on CANL, with minimum dominant time of 8–30 μs, allowing fast response to remote commands without auxiliary power rails.

What thermal protection features does MC33889DWR2 include?

MC33889DWR2 integrates overtemperature prewarning (TPW = 130–160°C) that sets the VDDTEMP flag, and thermal shutdown (TSD = 160–190°C) that disables outputs. The difference between thresholds (20–40°C) provides hysteresis to prevent oscillation. These protections apply in Normal and Standby modes; junction temperature is monitored continuously, and thermal resistance (R_THJ/P = 20°C/W) is specified to ground pins for heatsinking design.