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NXP Semiconductors MC33287DWR2
- Part No.:
- MC33287DWR2
- Manufacturer:
- NXP Semiconductors
- Category:
- Power Management - Specialized
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MC33287DWR2.pdf
- Description:
- IC SWITCH DUAL LOW-SIDE 20-SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,639
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Product details
Overview
MC33287DWR2 from Freescale Semiconductor is an automotive-grade contact monitoring and dual low-side protected driver IC. It interfaces switch contacts (to battery or ground) with a microcontroller, featuring eight 40 V-rated sense inputs with ratiometric thresholds and two current-limited (535 mA typ.) low-side drivers internally clamped to 50 V, used in vehicle body control modules for load supervision and fault diagnostics.
For engineers reviewing the MC33287DWR2 datasheet, MC33287DWR2 pinout, MC33287DWR2 application, or MC33287DWR2 equivalent, key selection criteria include high-voltage input sensing capability, integrated thermal/overcurrent protection per driver, multiplexed diagnostic reporting via OUT1, and compatibility with 5 V microcontroller logic levels under extended supply conditions (VDD1 = 5.0–18 V).
Technical Context
The MC33287DWR2 integrates an 8-to-1 analog multiplexer with address decoding (AD0–AD2) to route IN0–IN6 or internal fault signals (DIAGD1/DIAGD2) to OUT1, while IN7 connects directly to OUT7. Its dual low-side drivers (OUTD1/OUTD2) use complementary command logic: CD1 active-low and CD2 active-high, each with independent overtemperature shutdown and voltage-based fault detection (VFAULT = 2.0–3.5 V).
Input sensing operates ratiometrically to VDD1, supporting both switch-to-battery and switch-to-ground configurations. Standby current is 55 µA (typ.), and dynamic response includes tON = 1.3 µs (typ.) and tFALL = 1.0 µs (typ.), enabling fast contact state capture in automotive wake-up and status polling systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD1 Operating Range | 5.0–18 V - supports wide automotive battery voltage range including cold-crank (5 V) and load-dump (up to 40 V max rating) |
| Sense Input Voltage Rating | 40 V - enables direct interface to 12/24 V automotive switch networks without external level-shifting |
| Low-Side Output Current Limit | 535 mA (typ.) - provides controlled drive for relays, lamps, and solenoids while preventing destructive inrush |
| Output Clamp Voltage | 50 V (typ.) - suppresses inductive kickback from loads like fuel injectors or window motors |
| Standby Supply Current | 55 µA (typ.) - minimizes quiescent power in always-on vehicle modules |
| Operating Temperature | -40°C to +125°C - qualified for under-hood and body-control module environments |
| Package | 20-pin SOICW (DW suffix) - surface-mount package with enhanced thermal performance (RθJ-A = 100°C/W) |
Pinout & Package
MC33287DWR2 is housed in a 20-pin Small Outline Integrated Circuit Wide-body (SOICW) package, optimized for automotive thermal and mechanical reliability. Pin spacing is 1.27 mm, body width is 7.5 mm, and it complies with JEDEC MS-013AC standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 / VDD2 (Pins 1, 20) | High-voltage power supply input | VDD1 powers sense inputs and drivers (5–18 V); VDD2 supplies logic core (4.75–5.25 V) |
| IN0–IN7 (Pins 2–9, 16–19) | High-voltage sense inputs | Monitor switch states (to VBAT or GND); IN0–IN6 multiplexed to OUT1, IN7 direct to OUT7 |
| AD0–AD2 (Pins 3–5) | Multiplexer address select | Control which of IN0–IN6 or DIAGD1/DIAGD2 appears on OUT1 (3-bit binary decode) |
| CD1 / CD2 (Pins 12–13) | Driver command inputs | CD1 active-low controls OUTD1; CD2 active-high controls OUTD2 - polarity differs per driver |
| OUTD1 / OUTD2 (Pins 9, 11) | Low-side driver outputs | Switched ground paths for inductive/capacitive loads; include current limiting and thermal shutdown |
| OUT1 / OUT7 (Pins 14–15) | Multiplexed and direct diagnostic outputs | OUT1 reports selected input/fault; OUT7 mirrors IN7 status - both TTL-compatible (0–6 V swing) |
| GND (Pin 10) | Analog/digital reference ground | Common return for all internal circuitry; must be low-impedance connection in PCB layout |
Key Features
| Feature | Design Value |
|---|---|
| Eight 40 V sense inputs with ratiometric thresholds | Enables robust switch monitoring across full automotive battery range without external resistive dividers |
| Dual low-side drivers with independent fault reporting | Each driver provides real-time overtemperature and overload status via dedicated DIAG pins routed through multiplexer |
| 55 µA standby current | Supports low-power wake-on-contact functionality in always-on vehicle domains (e.g., door open detection) |
| Integrated 50 V output clamp | Eliminates need for external TVS diodes on driver outputs, reducing BOM count and board space |
| Pb-free SOICW packaging (EG suffix compatible) | Fulfills RoHS compliance requirements while maintaining thermal performance identical to legacy DW variant |
Applications
| Body Control Module (BCM) | Seat Position Memory System |
|---|---|
Use Scenario: Monitoring 8 vehicle switches (door ajar, trunk release, hood open, ignition position) and driving interior lamps or seat motor relays. IC Role / Device Role / Timing Role: Central contact monitor and protected load driver - senses mechanical switch states and actuates loads with built-in fault feedback. Use Value: Reduces MCU GPIO count by 8+2 pins; eliminates discrete protection components per driver; enables diagnostic logging of open/short faults per channel. | Use Scenario: Detecting seat track/motor limit switches and controlling bidirectional seat adjustment motors via H-bridge pre-driver interface. IC Role / Device Role / Timing Role: High-voltage switch interface and current-limited low-side enable for motor control logic - supports safe stall detection and thermal derating. Use Value: Enables precise end-stop detection without external comparators; driver current limit prevents motor winding damage during jam conditions. |
| Power Window Control Unit | Roof Panel Sunshade Actuator |
Use Scenario: Reading window switch inputs (up/down/auto) and driving window lift motor relays or half-bridge gate drivers. IC Role / Device Role / Timing Role: Contact status acquisition and protected low-side switching - handles noisy switch bounce and inductive relay kickback. Use Value: Built-in 50 V clamp absorbs relay coil energy; multiplexed OUT1 allows single ADC input to monitor all 8 switches and fault states. | Use Scenario: Monitoring sunshade position sensors and driving small DC gearmotor with stall protection. IC Role / Device Role / Timing Role: Low-power switch supervisor and thermally protected driver - operates in standby mode until shade movement is commanded. Use Value: 55 µA standby current extends battery life in infrequent-use accessories; independent thermal shutdown prevents motor overheating during obstruction events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive contact monitoring and low-side driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NXP MC33883 | Single-channel high-side driver with SPI interface; no integrated sense inputs or multiplexer | Requires external switch interface circuitry; suited for high-side load control only | Select when high-side switching and digital configuration (SPI) are required over analog multiplexing and dual low-side drive |
| Infineon BTS724G | Dual-channel high-side smart power switch; includes embedded PWM control but no contact monitoring inputs | Lacks 8-channel HV sensing; designed for direct MCU PWM control rather than switch-state polling | Choose for applications needing programmable current limits and integrated PWM dimming, not multi-switch monitoring |
Compared with MC33287DWR2, MC33883 offers digital configurability but requires external sensing infrastructure, while BTS724G delivers advanced protection features for high-side loads but omits the integrated contact monitoring architecture essential for BCM switch consolidation.
Availability
MC33287DWR2 is available at Aetrix Electronics and suitable for automotive body control modules, seat position memory systems, power window control units, and roof panel sunshade actuators requiring stable component supply across extended temperature and voltage ranges.
Supply support for MC33287DWR2 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
Freescale Semiconductor (now part of NXP Semiconductors) was a leading designer of automotive and industrial analog/mixed-signal ICs, known for robust, AEC-Q100 qualified products targeting harsh-environment applications.
The MC33287DWR2 belongs to Freescale's analog interface product line, engineered specifically for automotive body electronics to consolidate switch monitoring and protected load driving into a single IC - reducing system cost, PCB area, and validation effort.
FAQ
What is the maximum input voltage rating for the sense inputs on the MC33287DWR2?
The MC33287DWR2 sense inputs (IN0–IN7) are rated for up to 40 V absolute maximum, with input clamp voltage specified at 17–23 V (at I = 100 µA). This rating allows direct connection to 12 V and 24 V automotive battery rails without external voltage dividers, provided a series resistor ≥25 kΩ is used per input per datasheet Note 1.
How does the MC33287DWR2 report fault conditions from its low-side drivers?
The MC33287DWR2 reports driver faults via two dedicated open-drain diagnostic outputs: DIAGD1 and DIAGD2. These signals reflect overload (short-to-ground or open-load) and overtemperature events. They are routed internally to the 8-to-1 multiplexer and appear on OUT1 when AD2–AD0 = 111, enabling MCU readback using a single ADC or comparator input - no additional GPIOs required for fault monitoring.
Can the MC33287DWR2 operate with a 5 V microcontroller logic supply?
Yes, the MC33287DWR2 supports 5 V microcontroller interfacing: VDD2 operates from 4.75–5.25 V (full specification), and all logic-compatible outputs (OUT1, OUT7, DIAGD1/DIAGD2) swing 0–6 V, matching standard TTL/CMOS thresholds. Inputs AD0–AD2 and CD1/CD2 accept VIH = 8×VDD2 (≥40 V) and VIL ≤ 4×VDD2 (≤20 V), ensuring noise-immune operation even with 5 V MCU I/O.
What is the purpose of the AD0–AD2 pins on the MC33287DWR2?
The AD0–AD2 pins on the MC33287DWR2 serve as a 3-bit binary address decoder for the internal 8-to-1 analog multiplexer. They determine which signal - IN0 through IN6, or DIAGD1/DIAGD2 - is routed to the OUT1 output pin. This allows a single MCU input to sequentially sample all eight monitored switch states and two driver fault signals without requiring additional ADC channels or GPIOs.
Does the MC33287DWR2 support both switch-to-battery and switch-to-ground configurations?
Yes, the MC33287DWR2 supports both configurations: each of the eight sense inputs (IN0–IN7) can monitor switches connected either between VBAT and the input pin (switch-to-battery) or between the input pin and GND (switch-to-ground). The input threshold is ratiometric to VDD1, ensuring consistent detection across varying battery voltages - a critical feature for reliable operation in automotive start-stop and load-dump conditions.
MC33287DWR2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- Contact Monitor
- Current - Supply:
- 55µA
- Voltage - Supply:
- 7V ~ 18V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
MC33287DWR2 FAQ
1.How can I place an order for MC33287DWR2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC33287DWR2 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 MC33287DWR2 reliable?
The price and inventory of MC33287DWR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC33287DWR2 is usually 5 days.
3.What payment methods are accepted for MC33287DWR2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC33287DWR2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC33287DWR2?
MC33287DWR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC33287DWR2 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 MC33287DWR2?
For technical support, including MC33287DWR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC33287DWR2 requirements.
6.How does Aetrix verify that MC33287DWR2 is sourced from the original manufacturer or authorized distributors?
All MC33287DWR2 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 MC33287DWR2 meets industry standards.
7.What is the process for return or replacement of MC33287DWR2?
All MC33287DWR2 units undergo pre-shipment inspection (PSI). If there is an issue with MC33287DWR2, 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 MC33287DWR2 part is unused and in its original packaging.
Return procedure for MC33287DWR2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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