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NXP Semiconductors MC33298DWR2
- Part No.:
- MC33298DWR2
- Manufacturer:
- NXP Semiconductors
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MC33298DWR2.pdf
- Description:
- IC PWR SWITCH N-CHAN 1:8 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,255
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Product details
Overview
MC33298DWR2 from Freescale Semiconductor is an eight-channel low-side power switch IC with SPI serial interface, designed for automotive load control. It features 0.4 Ω RDS(ON) @ 25°C per channel, 3.0 A transient sink capability, 5.5–26.5 V wide VPWR supply range, and integrated open-load/over-current/over-temperature fault reporting via SO pin - used in body control modules to drive solenoids, relays, and lamps.
For engineers reviewing the MC33298DWR2 datasheet, MC33298DWR2 pinout, MC33298DWR2 application, or MC33298DWR2 equivalent, this page delivers verified electrical specs, SPI timing constraints up to 2.0 MHz (8.5 MHz demonstrated), thermal derating guidance for multi-output operation, and real-world fault behavior including SFPD-controlled current-limit vs. latch-off modes.
Technical Context
The MC33298DWR2 integrates an 8-bit serial-in shift register driving an 8-bit parallel output latch, enabling microcontroller bus expansion without additional GPIOs. Each output uses a discrete updrain DMOS transistor with independent analog monitoring circuitry for real-time fault detection.
Its SMARTMOS™ process combines 1.5 µm CMOS logic, bipolar/MOS analog sensing, and double-diffused MOS power transistors - delivering <2.0 mA IDD during operation while supporting 65 V output clamping and 25 µA sleep current. Fault reporting occurs via tri-state SO pin synchronized to CS transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output count | 8 independent low-side switches with open-drain configuration |
| RDS(ON) @ 25°C | 0.4 Ω max per channel at VPWR = 13 V, enabling ≤0.5 A continuous per output on standard PCB |
| VPWR range | 5.5–26.5 V operating; 28–36 V over-voltage shutdown with hysteresis prevents damage during load dump |
| SPI data rate | Guaranteed 2.0 MHz; functional up to 8.5 MHz at 25°C - supports fast MCU command throughput |
| Fault reporting | SO pin reports open-load (OFF state), short-to-battery, over-current, and over-temperature conditions serially |
| Thermal limit | 150°C junction shutdown with 10–20°C hysteresis; single-output RθJA = 37°C/W (SOICW package) |
| Supply current | Max 4.0 mA IDD during operation; 25 µA IPWR in sleep mode - critical for always-on automotive modules |
Pinout & Package
MC33298DWR2 is housed in a 24-pin SOICW (Wide-body Small Outline Integrated Circuit) package with exposed thermal pad (Case 738). Pin layout supports high-current sinking and thermal dissipation across eight GND pins (pins 5–8, 17–20).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OP0–OP7 (pins 24, 23, 14, 13, 12, 11, 2, 1) | Output drain terminals | Eight independent low-side switch outputs; each sinks up to 3.0 A transient current with 65 V clamp protection |
| VPWR (pin 21) | Main power supply input | Drives gate bias for all DMOS outputs; accepts 5.5–26.5 V; triggers over-voltage shutdown at 28–36 V |
| VDD (pin 16) | Logic supply input | Provides 4.5–5.5 V for internal CMOS logic; includes UVLO at 2.0–4.5 V to reset registers on brownout |
| SCLK, SI, SO, CS (pins 3, 4, 9, 10) | SPI interface signals | Full-duplex synchronous serial control: SI reads on SCLK falling edge; SO outputs fault status on CS high |
| RST (pin 22) | Active-low reset | Clears SPI shift register and forces all outputs OFF; requires ≥250 ns low pulse width |
| SFPD (pin 15) | Short-fault protect disable | Grounding disables latch-off on over-current; pulling to 5.0 V enables current-limit-only mode (no shutdown) |
| GND (pins 5–8, 17–20) | Power ground & thermal path | Eight dedicated ground pins reduce IR drop and improve heat spreading; essential for 0.5 A continuous per output |
Key Features
| Feature | Design Value |
|---|---|
| 8-channel SPI-controlled low-side switching | Reduces MCU GPIO count by 8; enables daisy-chaining of multiple MC33298DWR2 devices using single CS line |
| Independent per-output fault monitoring | Detects open-load (OFF), short-to-battery, over-current (3.0–6.0 A), and over-temperature (155–185°C) - reported via SO pin |
| Wide VPWR operating range | 5.5–26.5 V supports 12 V and 24 V automotive systems, including cold-crank (5.5 V) and load-dump (26.5 V) conditions |
| Low RDS(ON) and standby current | 0.4 Ω @ 25°C minimizes conduction loss; 25 µA IPWR enables always-on monitoring in battery-sensitive applications |
| Configurable fault response | SFPD pin selects between latched shutdown (SFPD = GND) or non-latching current limit (SFPD = 5.0 V) per output |
Applications
| Automotive Body Control Module | Industrial PLC Output Stage |
|---|---|
|
Use Scenario: Centralized control of door locks, interior lighting, and window motors in modern vehicles. IC Role / Device Role / Timing Role: Low-side switch IC managing eight independent 12 V loads via SPI from main ECU; handles in-rush currents during lamp turn-on. Use Value: Eliminates need for discrete driver transistors and external protection diodes; built-in 65 V clamp suppresses inductive kickback from solenoids. |
Use Scenario: Modular I/O expansion in programmable logic controllers for factory automation equipment. IC Role / Device Role / Timing Role: SPI-expander IC converting serial commands into parallel 24 V DC output control signals for valves and actuators. Use Value: Enables hot-swap-capable output modules with per-channel fault isolation - no system-wide shutdown on single short. |
| Commercial Vehicle Lighting System | Off-Highway Equipment Control |
|
Use Scenario: LED and incandescent lamp control in heavy-duty trucks and buses with stringent EMC and thermal requirements. IC Role / Device Role / Timing Role: High-efficiency low-side driver IC with current limiting for resistive lamp loads; monitors open-circuit faults during diagnostics. Use Value: Built-in open-load detection during OFF state confirms bulb integrity without external sense resistors or ADC channels. |
Use Scenario: Hydraulic valve and PTO engagement control in agricultural and construction machinery operating in harsh temperature environments. IC Role / Device Role / Timing Role: Robust power switch IC rated for -40°C to +125°C ambient; withstands vibration, moisture, and voltage transients per ISO 7637-2. Use Value: 150°C junction shutdown and thermal hysteresis prevent thermal runaway during extended duty cycles in enclosed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-side power switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NVN3320SP | Single-channel 3.0 A low-side switch; no SPI interface; requires 8× separate control lines vs. one serial bus | Lacks fault reporting and daisy-chain capability; suited for simple point-of-load control only | Select when board space is constrained and SPI complexity is unnecessary; not suitable for BOM consolidation |
| TPS27082L | 8-channel SPI low-side switch but with 1.2 A continuous rating and no open-load detection in OFF state | Lower current capacity and missing OFF-state open-load reporting limits use in lamp diagnostics | Choose for cost-sensitive industrial designs where full automotive-grade fault coverage is not required |
Compared with NVN3320SP and TPS27082L, the MC33298DWR2 uniquely delivers 8-channel SPI control, per-output open-load detection during OFF state, and 65 V clamping - making it the only option qualified for automotive body electronics requiring diagnostic compliance per ISO 16750.
Availability
MC33298DWR2 is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC output stages, and commercial vehicle lighting systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MC33298DWR2 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) is a global leader in automotive and industrial microcontrollers and analog power solutions, with deep expertise in SMARTMOS™ mixed-signal technology.
The MC33298DWR2 belongs to Freescale's automotive-grade SMARTMOS™ power switch family, engineered specifically for robust, fault-aware control of inductive and resistive loads in harsh vehicle environments.
FAQ
What is the maximum continuous current per output for MC33298DWR2 on a standard PCB?
The MC33298DWR2 supports 0.5 A continuous current per output when all eight outputs are simultaneously ON and mounted on a typical FR-4 PCB with adequate copper pour. This rating assumes TA = 25°C and accounts for thermal derating due to shared RθJA = 31°C/W (all outputs ON). Higher currents require reduced channel count or enhanced heatsinking.
How does the SFPD pin affect fault behavior in MC33298DWR2?
When SFPD is grounded, the MC33298DWR2 latches OFF individual outputs experiencing over-current (3.0–6.0 A) after a 25–100 ms delay. When SFPD is pulled to 5.0 V, the same over-current condition forces the output into current-limit mode without shutdown - allowing continued operation under fault conditions, which is critical for fail-operational systems.
Can MC33298DWR2 be used in 24 V truck applications?
Yes - the MC33298DWR2 operates across 5.5–26.5 V VPWR, covering nominal 24 V systems, cold-crank down to 5.5 V, and load-dump transients up to 26.5 V. Its over-voltage shutdown activates at 28–36 V, providing margin against extreme spikes. The device is qualified for -40°C to +125°C ambient operation, meeting commercial vehicle environmental requirements.
Does MC33298DWR2 support daisy-chaining for expanded I/O?
Yes - the MC33298DWR2 supports true daisy-chaining via its SO (serial output) and SI (serial input) pins. Multiple devices can be cascaded so that a single SPI transaction writes to all shift registers and reads back fault status from all devices sequentially, reducing MCU pin count and simplifying firmware for large-scale load control.
What is the purpose of the eight GND pins on MC33298DWR2?
The eight GND pins (pins 5–8, 17–20) on the MC33298DWR2 serve dual roles: they provide low-impedance return paths for up to 3.0 A transient current per output, minimizing voltage bounce and crosstalk, and act as primary thermal conduction paths to the PCB - essential for maintaining TJ ≤ 150°C during sustained 0.5 A per output operation.
MC33298DWR2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Switch Type:
- General Purpose
- Number of Outputs:
- 8
- Ratio - Input:Output:
- 1:8
- Output Configuration:
- Low Side
- Output Type:
- N-Channel
- Interface:
- SPI
- Voltage - Load:
- 9V ~ 26.5V
- Voltage - Supply (Vcc/Vdd):
- 2.5V ~ 4.5V
- Current - Output (Max):
- 1A
- Rds On (Typ):
- 350mOhm
- Input Type:
- -
- Features:
- -
- Fault Protection:
- Current Limiting (Fixed), Open Load Detect, Over Temperature, Over Voltage
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SOIC
MC33298DWR2 FAQ
1.How can I place an order for MC33298DWR2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC33298DWR2 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 MC33298DWR2 reliable?
The price and inventory of MC33298DWR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC33298DWR2 is usually 5 days.
3.What payment methods are accepted for MC33298DWR2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC33298DWR2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC33298DWR2?
MC33298DWR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC33298DWR2 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 MC33298DWR2?
For technical support, including MC33298DWR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC33298DWR2 requirements.
6.How does Aetrix verify that MC33298DWR2 is sourced from the original manufacturer or authorized distributors?
All MC33298DWR2 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 MC33298DWR2 meets industry standards.
7.What is the process for return or replacement of MC33298DWR2?
All MC33298DWR2 units undergo pre-shipment inspection (PSI). If there is an issue with MC33298DWR2, 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 MC33298DWR2 part is unused and in its original packaging.
Return procedure for MC33298DWR2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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