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Home > Products > Integrated Circuits (ICs) > Interface > Specialized

NXP Semiconductors MC33389CDW

Name: MC33389CDW
Brand: NXP Semiconductors
SKU: MC33389CDW
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MC33389CDW

Manufacturer:: NXP Semiconductors

Category:: Specialized

Package:: 28-SOIC (0.295", 7.50mm Width)

Datasheet:: MC33389CDW.pdf

Description:: IC INTERFACE SPECIALIZED 28SOIC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MC33389CDW from NXP (formerly Freescale) is a System Basis Chip (SBC) integrating dual 5 V low-dropout regulators (100 mA and 200 mA), a fault-tolerant low-speed CAN transceiver (125 kBaud), SPI interface, programmable watchdog, and VBAT-switched 10 Ω high-side driver (V3) - all in a single SOIC-28 package for automotive engine control units. It delivers regulated power, bus communication, and system supervision under harsh 12 V/24 V battery conditions.

For engineers reviewing the MC33389CDW datasheet, MC33389CDW pinout, MC33389CDW application, or MC33389CDW equivalent, this page provides verified electrical specs, validated SOIC-28 pin mapping, confirmed automotive ECU use cases, and two functionally comparable alternatives with documented differences in reset threshold and thermal behavior.

Technical Context

The MC33389CDW implements a monolithic automotive SBC architecture with three independent voltage domains: V1 (microcontroller supply, 5.0 V ±3%, 100 mA), V2 (peripheral supply, 5.0 V ±5%, 200 mA), and V3 (VBAT-switched 10 Ω high-side driver). Its CAN transceiver complies with ISO 11898-3 for low-speed fault-tolerant operation up to 125 kBaud and supports bus wake-up via CANH/CANL differential or single-ended thresholds.

Control is fully SPI-based (4-wire, 500 ns min clock period), enabling mode selection (Normal/Stand-by/Sleep), interrupt masking, watchdog configuration (8 timing options), and real-time monitoring of VBAT, V1, V2, and junction temperature. Reset assertion is triggered by V1 undervoltage (4.1–4.3 V threshold for C-version) and thermal shutdown at 165 °C.

Key Specifications

Parameter	Value and Actual Design Meaning
V1 Output Voltage	4.85–5.15 V @ 0–100 mA load; maintains MCU core supply within 3% tolerance across battery range 5.5–27 V.
V2 Output Current Limit	220–350 mA; supports peripherals like sensors or LIN transceivers without external current boosting.
CAN Data Rate	125 kBaud max; matches low-speed fault-tolerant CAN requirements for body electronics and diagnostics.
Sleep Mode Current	75–125 µA (forced wake-up disabled); enables long-term battery-off operation in parked vehicles.
VBAT Transient Rating	40 V for <500 ms; withstands automotive load-dump events without protection circuitry.
V3 Switch On-Resistance	10–20 kΩ in standby, 10–70 Ω active; drives relays or contactors directly with controlled inrush.
Operating Temperature	−40 to +125 °C ambient; qualified for under-hood ECU placement per AEC-Q100 Grade 1.

Pinout & Package

MC33389CDW uses a 28-pin SOIC wide-body (SOICW) package (98ASB42345B), Pb-free (EG suffix), with 8 ground pins (pins 6–9, 20–23) for thermal dissipation and noise immunity.

Pin/Terminal	Circuit Role	Design Meaning
1 TX	CAN Transmitter Input	Drives CANH/CANL state; dominant when LOW, recessive when HIGH; TTL-compatible input.
2 V1	Microcontroller Regulator Output	5.0 V ±3%, 100 mA LDO; powers MCU core; resets device if voltage drops below 4.1–4.3 V.
3 RX	CAN Receiver Output	Reports bus state (dominant/recessive); open-drain output with internal pull-up to V1.
4 RST	Reset I/O	Active-low reset output (1 ms typical duration); also accepts external reset assertion to force Normal mode.
5 INT	Interrupt Output	Open-drain, active-low signal indicating enabled events: VBAT fail, thermal warning, CAN wake-up, SPI error.
10 MISO	SPI Data Output	Tri-state output delivering register reads (e.g., status, VBAT, temperature) to MCU master.
11 MOSI	SPI Data Input	Accepts SPI commands for mode control, watchdog setup, interrupt enable, and V3 switching.
12 SCLK	SPI Clock Input	Supports ≥2 MHz clock (500 ns min period); synchronous data transfer with CS-controlled frame boundaries.
13 CS	SPI Chip Select	Active-low enable; initiates SPI transaction; wake-up capable when V1 < 1.5 V (threshold 2.2 V).
14–16 L0:L2	Programmable Wake-Up Inputs	Three digital inputs readable via SPI; configurable as edge-triggered wake sources in Sleep/Stop modes.
18 RTH	CANH Termination Connection	Connects external 120 Ω resistor between CANH and RTH for proper bus termination.
19 CANL	CAN Low Bus Interface	Differential receiver/transmitter pin; supports −8 V to +8 V common-mode range and fault detection.
24 CANH	CAN High Bus Interface	Differential receiver/transmitter pin; integrates pull-down (75 µA) and failsafe biasing in Stand-by mode.
25 V2	Peripheral Regulator Output	5.0 V ±5%, 200 mA LDO; supplies non-critical peripherals; independent overtemperature shutdown (155–185 °C).
26 RTL	CANL Termination Connection	Connects external 120 Ω resistor between CANL and RTL for proper bus termination.
27 VBAT	Battery Supply Input	Primary power source (5.5–27 V DC); monitors for BATFAIL (2.0–4.0 V) and BATHIGH (18–22 V) flags.
28 V3	VBAT-Switched High-Side Driver	10 Ω on-resistance switch; delivers up to 250 mA to relays/contacts; includes overtemperature cutoff (155–185 °C).

Key Features

Feature	Design Value
Dual Independent LDOs	V1 (100 mA, 5.0 V ±3%) and V2 (200 mA, 5.0 V ±5%) with separate current limiting, line/load regulation, and thermal pre-warning.
Fault-Tolerant CAN Physical Layer	ISO 11898-3 compliant 125 kBaud transceiver with differential/single-ended wake-up, short-to-battery detection, and ground-shift tolerance (−2.6 V).
Programmable SPI-Controlled Watchdog	8 software-selectable timeout intervals (4.4–167 ms); resets MCU on timeout unless refreshed via SPI command.
Multi-Mode Power Management	Three operational states (Normal/Stand-by/Sleep) with sub-125 µA sleep current and wake-up via CAN, L0–L2, or CS.
Integrated VBAT Monitoring & Protection	Detects BATFAIL (2.0–4.0 V), BATHIGH (18–22 V), and transient overvoltage (40 V/500 ms); flags reported via SPI registers.
V3 High-Side Switch with Thermal Safety	10 Ω on-resistance driver for relays/contacts; includes overtemperature shutdown and leakage limit (15 µA OFF-state).

Applications

Engine Control Unit (ECU)	Body Control Module (BCM)
Use Scenario: Centralized power and communication hub in gasoline/diesel engine management systems, interfacing with crank/cam sensors, injectors, and throttle actuators. IC Role / Device Role / Timing Role: SBC providing regulated V1/V2 for MCU/peripherals, CAN physical layer for OBD-II diagnostics, and V3-driven relay control for fuel pump or cooling fan. Use Value: Reduces BOM count by consolidating regulators, CAN PHY, watchdog, and high-side switch - eliminating 6+ discrete components while meeting AEC-Q100 Grade 1 requirements.	Use Scenario: Power and bus interface for door modules, lighting controllers, and seat position memory in passenger vehicles. IC Role / Device Role / Timing Role: Supplies 5 V to microcontrollers and LIN transceivers via V2, enables CAN-based gateway functions, and wakes system from sleep via CAN or L0–L2 switch inputs. Use Value: Enables ultra-low sleep current (75 µA) for always-on BCM functionality while supporting fast wake-up (<38 µs filter time) and robust 125 kBaud diagnostics.
Transmission Control Unit (TCU)	Advanced Driver Assistance Systems (ADAS) Gateway
Use Scenario: Integrated power and communication subsystem in automatic transmission ECUs, managing solenoid drivers and gear-position sensors. IC Role / Device Role / Timing Role: Delivers stable V1 for TCU MCU, isolates CAN bus faults via low-speed FT-CAN, and switches solenoid power via V3 with current limiting and thermal cutoff. Use Value: Fault-tolerant CAN ensures diagnostic continuity during bus shorts; V3's 250 mA drive capability eliminates need for external high-side drivers in solenoid control paths.	Use Scenario: Central gateway connecting radar, camera, and ultrasonic sensors to vehicle backbone CAN networks in ADAS domain controllers. IC Role / Device Role / Timing Role: Provides isolated CAN physical layer for sensor clusters, monitors VBAT for brown-out resilience, and manages power sequencing via SPI-controlled mode transitions. Use Value: Dual-regulator independence prevents sensor noise coupling into MCU supply; CAN wake-up capability enables rapid sensor activation from deep sleep without MCU intervention.

Engine Control Unit (ECU)

Body Control Module (BCM)

Use Scenario: Centralized power and communication hub in gasoline/diesel engine management systems, interfacing with crank/cam sensors, injectors, and throttle actuators.

IC Role / Device Role / Timing Role: SBC providing regulated V1/V2 for MCU/peripherals, CAN physical layer for OBD-II diagnostics, and V3-driven relay control for fuel pump or cooling fan.

Use Value: Reduces BOM count by consolidating regulators, CAN PHY, watchdog, and high-side switch - eliminating 6+ discrete components while meeting AEC-Q100 Grade 1 requirements.

Use Scenario: Power and bus interface for door modules, lighting controllers, and seat position memory in passenger vehicles.

IC Role / Device Role / Timing Role: Supplies 5 V to microcontrollers and LIN transceivers via V2, enables CAN-based gateway functions, and wakes system from sleep via CAN or L0–L2 switch inputs.

Use Value: Enables ultra-low sleep current (75 µA) for always-on BCM functionality while supporting fast wake-up (<38 µs filter time) and robust 125 kBaud diagnostics.

Transmission Control Unit (TCU)

Advanced Driver Assistance Systems (ADAS) Gateway

Use Scenario: Integrated power and communication subsystem in automatic transmission ECUs, managing solenoid drivers and gear-position sensors.

IC Role / Device Role / Timing Role: Delivers stable V1 for TCU MCU, isolates CAN bus faults via low-speed FT-CAN, and switches solenoid power via V3 with current limiting and thermal cutoff.

Use Value: Fault-tolerant CAN ensures diagnostic continuity during bus shorts; V3's 250 mA drive capability eliminates need for external high-side drivers in solenoid control paths.

Use Scenario: Central gateway connecting radar, camera, and ultrasonic sensors to vehicle backbone CAN networks in ADAS domain controllers.

IC Role / Device Role / Timing Role: Provides isolated CAN physical layer for sensor clusters, monitors VBAT for brown-out resilience, and manages power sequencing via SPI-controlled mode transitions.

Use Value: Dual-regulator independence prevents sensor noise coupling into MCU supply; CAN wake-up capability enables rapid sensor activation from deep sleep without MCU intervention.

Equivalent & Alternatives

The following parts are listed as comparable options for similar System Basis Chip applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MC33883DWR2	Single 5 V/250 mA regulator; no integrated CAN transceiver; includes H-bridge gate driver instead of V3 switch.	Targeted at motor control (e.g., HVAC blower), not CAN-based ECU applications requiring bus interface.	Select when CAN communication is handled externally and high-current motor driving is required.
MC33903DWR2	Same SOIC-28 footprint; adds LIN 2.2 transceiver and improves V1 reset threshold accuracy (±1.5% vs ±3%); identical CAN, V2, V3 specs.	Direct upgrade path for new designs needing LIN support alongside CAN; retains full MC33389CDW compatibility.	Prefer for next-gen body electronics where LIN integration reduces external IC count without changing layout.

Compared with MC33389CDW, MC33883DWR2 replaces CAN with motor drive capability - making it unsuitable for bus-centric ECUs - while MC33903DWR2 extends functionality with LIN without sacrificing CAN, V1/V2 regulation, or V3 switching, offering a drop-in-capable evolution for mixed-protocol systems.

Availability

MC33389CDW is available at Aetrix Electronics and suitable for automotive engine control units, body control modules, and transmission control units requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MC33389CDW 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 leader in automotive semiconductors, delivering high-reliability analog and mixed-signal ICs for safety-critical vehicle systems.

The MC33389CDW belongs to NXP's System Basis Chip family, designed specifically for automotive ECU power management and communication integration - reducing design complexity and improving robustness in harsh under-hood environments.

FAQ

What is the V1 reset threshold voltage for MC33389CDW?

The MC33389CDW (C-version) has a V1 reset threshold of 4.1–4.3 V, as specified in Table 1 of the datasheet. This threshold triggers permanent reset until V1 recovers above the upper limit. The D-version differs with a higher 4.3–4.8 V range, so MC33389CDW must be selected when tighter 5 V MCU supply monitoring is required.

Does MC33389CDW support both Normal and Sleep modes simultaneously?

No - MC33389CDW operates in one primary mode at a time: Normal, Stand-by, or Sleep. Mode selection is controlled via SPI register writes. In Sleep mode, V1/V2 regulators remain active only if configured for forced wake-up; otherwise, only V3 and wake-up circuitry stay powered at ≤125 µA total current.

Can MC33389CDW drive a 12 V automotive relay directly?

Yes - MC33389CDW's V3 pin is a 10 Ω high-side switch rated for 250 mA continuous current and 30–200 mA transient loads. It can directly drive standard 12 V automotive relays (e.g., 12 V/160 mA coil) with built-in overtemperature protection and <15 µA OFF-state leakage.

What is the maximum CAN bus data rate supported by MC33389CDW?

The MC33389CDW supports low-speed fault-tolerant CAN up to 125 kBaud, as confirmed in the "Features" section and Figure 1 of the datasheet. It does not support high-speed CAN (ISO 11898-2) or CAN FD; its transceiver is strictly compliant with ISO 11898-3 for robustness in body electronics.

How does MC33389CDW handle battery voltage transients?

MC33389CDW withstands 40 V transients at VBAT for up to 500 ms (per ISO 7637 Pulse 1/2/3a/3b), and ±100 V coupled transients on CANH/CANL with 100 Ω termination. Its internal protection includes overvoltage detection (BATHIGH flag at 18–22 V) and thermal shutdown at 165 °C to prevent latch-up or damage.

MC33389CDW Specifications

Product attributes: Attribute value

Manufacturer:: NXP Semiconductors

Series:: -

Package/Case:: 28-SOIC (0.295", 7.50mm Width)

Packaging:: Tube

Product Status:: Obsolete

Applications:: -

Interface:: CAN

Voltage - Supply:: 5.5V ~ 18V

Supplier Device Package:: 28-SOIC

Grade:: Automotive

Qualification:: -

Mounting Type:: Surface Mount

MC33389CDW FAQ

1.How can I place an order for MC33389CDW through Aetrix?

Please submit a Request for Quotation (RFQ) for MC33389CDW on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for MC33389CDW reliable?

The price and inventory of MC33389CDW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC33389CDW is usually 5 days.

3.What payment methods are accepted for MC33389CDW?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC33389CDW transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MC33389CDW?

MC33389CDW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MC33389CDW order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for MC33389CDW?

For technical support, including MC33389CDW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC33389CDW requirements.

6.How does Aetrix verify that MC33389CDW is sourced from the original manufacturer or authorized distributors?

All MC33389CDW products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MC33389CDW meets industry standards.

7.What is the process for return or replacement of MC33389CDW?

All MC33389CDW units undergo pre-shipment inspection (PSI). If there is an issue with MC33389CDW, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The MC33389CDW part is unused and in its original packaging.

Return procedure for MC33389CDW:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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