NXP Semiconductors MC33689DWBR2

Overview

MC33689DWBR2 from NXP Semiconductors (formerly Freescale) is a SPI-controlled System Basis Chip (SBC) integrating a LIN 2.0 transceiver, 5.0 V/50 mA LDO regulator with fault reporting, three protected high-side switches (HS1/HS2: 150 mA PWM-capable; HS3: 50 mA), current sense op-amp, and dual high-voltage wake-up inputs. It serves as the central power, interface, and protection hub in automotive body electronics such as power window, mirror, and seat control modules.

For engineers reviewing the MC33689DWBR2 datasheet, MC33689DWBR2 pinout, MC33689DWBR2 application, or MC33689DWBR2 equivalent, key selection criteria include its 4 MHz SPI interface timing, LIN bus wake-up capability in Sleep/Stop modes, 150 mA PWM-switching performance, thermal shutdown thresholds (165 °C), and diagnostic register accessibility via SPI.

Technical Context

The MC33689DWBR2 implements a multi-mode system controller architecture with Normal, Sleep, and Stop operational states-each with distinct power domains and wake-up sources (LIN bus, VS1/VS2 supply, L1/L2 inputs, or MCU command). Its LIN physical layer supports programmable slew rate (normal/slow/fast) and waveshaping disable for >100 kbps operation, compliant with ISO 17987-4.

Internally, the device integrates a 5.0 V LDO regulator with ±2.5% output accuracy (4.75–5.25 V at 50 mA), three independent high-side drivers with overcurrent/overtemperature latching, and a rail-to-rail current sense amplifier (±15 mV offset, 1 MHz GBW) referenced to AGND/TGND. All diagnostics-including undervoltage, overvoltage, thermal pre-warning, and switch faults-are readable via dedicated SPI status registers.

Key Specifications

Pinout & Package

MC33689DWBR2 is housed in a 32-pin SOICW (Wide-body Small Outline Integrated Circuit) package with exposed thermal pad (EW suffix), RoHS-compliant and Pb-free per 98ARH99137A.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC33883GEKR2 and TLE9263-2QX, the MC33689DWBR2 uniquely combines LIN transceiver, 5.0 V regulator, current sense op-amp, and three protected switches in a single 32-pin SOICW-making it optimal for cost-sensitive, space-constrained LIN slave nodes requiring full self-contained functionality.

Availability

MC33689DWBR2 is available at Aetrix Electronics and suitable for automotive body electronics, power seat/window control systems, and mirror adjustment modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MC33689DWBR2 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 focused on automotive, industrial, and IoT applications, delivering secure, energy-efficient, and scalable silicon solutions.

The MC33689DWBR2 belongs to NXP's System Basis Chip portfolio, designed specifically for automotive LIN slave nodes requiring integrated power management, communication, protection, and diagnostics in a single package.

FAQ

What is the maximum LIN bus data rate supported by the MC33689DWBR2?

The MC33689DWBR2 supports up to 100 kbps in standard LIN 2.0 mode with waveshaping enabled. When waveshaping is disabled via SPI configuration, the LIN transceiver allows higher data rates-verified in application testing up to 125 kbps-while maintaining bus compatibility and noise immunity per ISO 17987-4.

How does the MC33689DWBR2 handle overtemperature conditions in its high-side switches?

The MC33689DWBR2 monitors junction temperature continuously. If HS1/HS2 exceed 155 °C or HS3 exceeds 155 °C, the affected switch latches OFF, sets a fault flag in the SPI status register, and asserts the INT pin. Recovery requires SPI command or power cycle-preventing thermal runaway during sustained overload.

Can the MC33689DWBR2's current sense amplifier be used with external shunt resistors?

Yes-the MC33689DWBR2's current sense amplifier accepts differential inputs at E+ and E− pins with rail-to-rail common-mode range (−0.1 V to VCC+0.1 V) and ±15 mV input offset. It is explicitly designed for use with external shunt resistors (e.g., 10–100 mΩ) to monitor load currents up to 150 mA with high accuracy.

What wake-up sources are available in Sleep mode for the MC33689DWBR2?

In Sleep mode (VDD OFF), the MC33689DWBR2 can be woken by LIN bus activity (rising edge detected), signals on L1 or L2 inputs, or a falling edge on VS1/VS2 supply. Wake-up latency is typically 30 µs from LIN edge to VDD ramp-up, verified per Figure 9 in the datasheet.

Is the MC33689DWBR2 pin-compatible with earlier revisions like MC33689DPEW?

Yes-MC33689DWBR2 shares identical pinout, electrical characteristics, and thermal profile with MC33689DPEW. Both use the 32-pin SOICW package (EW suffix), and all functional pins-including HS1/HS2/HS3, LIN, SPI, and current sense terminals-are mapped identically per Table 1 of the datasheet.