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NXP Semiconductors MC33290DR2
- Part No.:
- MC33290DR2
- Manufacturer:
- NXP Semiconductors
- Category:
- Specialized
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MC33290DR2.pdf
- Description:
- IC INTERFACE SPECIALIZED 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,257
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Product details
Overview
MC33290DR2 from Freescale Semiconductor is an ISO 9141-compliant K-line serial bus interface IC designed for automotive on-board diagnostics (OBD) systems. It provides bidirectional half-duplex level translation between a 5 V CMOS microcontroller and the vehicle's 8–18 V battery-powered K-line bus, with integrated short-circuit protection, thermal shutdown, and 8 kV ESD capability. It operates across –40°C to +125°C and is housed in an 8-pin SOICN package.
For engineers reviewing the MC33290DR2 datasheet, MC33290DR2 pinout, MC33290DR2 application, or MC33290DR2 equivalent, this device is selected for robustness in automotive diagnostic communication where voltage tolerance, bus fault resilience, and ISO 9141 physical layer compliance are mandatory design requirements.
Technical Context
The MC33290DR2 implements a dedicated analog front-end for ISO K-line signaling, featuring a current-limited active pull-down driver and internal passive pull-up to VBB. Its input thresholds (VIH/ISO = 0.7×VBB, VIL/ISO = 0.4×VBB) and hysteresis (0.05–0.1×VBB) ensure noise immunity across wide battery voltage (8–18 V) and temperature (–40°C to +125°C) ranges.
It integrates SMARTMOS process technology combining CMOS logic, bipolar/MOS analog circuitry, and DMOS power FETs - enabling simultaneous 5 V logic interfacing (VDD), high-voltage bus driving (VBB), and fault-protected ISO pin operation. Thermal shutdown triggers at 150–170°C with hysteresis, and short-circuit current is limited to 50–1000 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range (VBB) | 8.0 V to 18 V - supports full automotive battery range including cold-crank (≥6 V functional) and load-dump transients (survives 45 V peak). |
| Logic Supply (VDD) | 4.75 V to 5.25 V - compatible with standard 5 V CMOS microcontrollers without level-shifting circuitry. |
| Operating Temperature | –40°C to +125°C ambient - qualified for under-hood automotive environments per AEC-Q100 stress guidelines. |
| ISO Pin Short-Circuit Current Limit | 50 mA to 1000 mA - enables safe bus fault handling without external current-limiting resistors. |
| Fall Time (ISO) | ≤2.0 µs (RISO = 510 Ω, CISO = 10 nF) - supports data rates up to 150 kbps per ISO 9141 timing constraints. |
| ESD Protection | ±2000 V HBM - meets automotive ESD robustness requirements with minimal external protection components. |
| Thermal Shutdown Threshold | 150°C (min), 170°C (typ) - protects against latch-up during sustained bus shorts or high-temperature operation. |
| VBB Sleep Current | ≤50 µA - enables low-power diagnostic mode with negligible battery drain during vehicle standby. |
Pinout & Package
MC33290DR2 is packaged in an 8-pin SOICN (Small Outline Integrated Circuit, Narrow) surface-mount plastic package (suffix D), compliant with JEDEC MS-012AC, 1.27 mm pitch, body width 3.9 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VBB | Battery supply input | High-voltage rail (8–18 V); powers ISO driver stage and internal bias; includes 45 V transient protection capability. |
| 2 - NC | No-connect terminal | Not internally bonded; must remain unconnected per datasheet - no routing or grounding allowed. |
| 3 - GND | Signal and power return | Common reference for VDD, VBB, TX, RX, and ISO; requires low-impedance PCB connection to minimize noise coupling. |
| 4 - ISO | K-line bus interface | Bi-directional half-duplex bus node; features active pull-down, internal pull-up to VBB, short-circuit and ESD protection. |
| 5 - TX | Microcontroller transmit input | CMOS-compatible logic input (VIH = 0.7×VDD); includes internal 2–40 µA pull-up to VDD for fail-safe idle-high behavior. |
| 6 - RX | Microcontroller receive output | CMOS-compatible logic output (VOH ≥ 0.8×VDD, VOL ≤ 0.2×VDD); translates ISO bus state to MCU logic levels. |
| 7 - VDD | Digital logic supply | 5 V supply for internal logic, TX/RX buffers, and CEN interface; decoupling capacitor required near pin. |
| 8 - CEN | Chip enable control | Active-high enable (VIH ≥ 0.7×VDD); internal 2–40 µA pull-down ensures sleep mode on power-up or open-circuit condition. |
Key Features
| Feature | Design Value |
|---|---|
| ISO K-line short-circuit protection | Integrated current limiting (50–1000 mA) eliminates need for external series resistors while maintaining bus functionality during faults. |
| Thermal shutdown with hysteresis | Auto-recovery protection at 150–170°C prevents destructive latch-up during prolonged overloads or high-ambient conditions. |
| 8 kV HBM ESD capability | Robustness against electrostatic discharge without requiring additional TVS diodes on ISO line in most board layouts. |
| Standby mode with zero VBat drain | VBB current ≤50 µA when CEN = low - enables always-connected OBD interfaces without battery depletion risk. |
| Ratio-metric input thresholds | TX and CEN thresholds scale with VDD (e.g., VIH(CEN) = 0.7×VDD), ensuring reliable operation across 4.75–5.25 V supply variation. |
| 10 nF ISO bus capacitance tolerance | Guaranteed timing performance (≤2 µs fall time) even with long harnesses or connector parasitics common in vehicle wiring. |
Applications
| OBD-II Diagnostic Tool Interface | Vehicle ECU Flash Programming Port |
|---|---|
|
Use Scenario: Handheld scan tool connects to vehicle DLC (Data Link Connector) via K-line to read DTCs and perform live data streaming. IC Role / Device Role / Timing Role: MC33290DR2 acts as the physical layer translator, converting 5 V UART signals from the tool's MCU into ISO 9141-compliant K-line waveforms and vice versa. Use Value: Enables interoperability with all CARB-compliant vehicles by meeting exact ISO 9141 rise/fall time, voltage threshold, and fault-tolerance requirements. |
Use Scenario: Service technician reprograms engine control unit firmware using OEM diagnostic software over K-line. IC Role / Device Role / Timing Role: MC33290DR2 provides galvanically isolated level translation and bus drive strength to sustain reliable 10.4 kbps programming sequences across noisy vehicle harnesses. Use Value: Guarantees bit-level integrity during extended programming sessions by maintaining <2 µs ISO fall time and >1000 mA short-circuit survival. |
| Aftermarket Telematics Gateway | Automotive Test Bench Communication Module |
|
Use Scenario: Embedded telematics unit monitors vehicle health and uploads diagnostic logs via cellular link, requiring periodic K-line polling. IC Role / Device Role / Timing Role: MC33290DR2 serves as the low-power K-line interface, entering sleep mode (CEN = low) between polls to minimize quiescent current draw. Use Value: Achieves ≤50 µA VBB sleep current, extending battery life in always-on connected devices deployed in parked vehicle monitoring applications. |
Use Scenario: Lab test bench simulates K-line communication between multiple ECUs during hardware-in-the-loop (HIL) validation. IC Role / Device Role / Timing Role: MC33290DR2 replicates real-world ECU bus behavior - including thermal shutdown response and short-circuit recovery - for accurate fault injection testing. Use Value: Provides deterministic fault modes (e.g., thermal shutdown at 150°C) that match production ECU behavior, improving test coverage fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ISO K-line interface applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STL9200CD | Single-supply (5 V only), no VBB pin; requires external high-side driver for K-line; lower ESD rating (4 kV HBM). | Limited to bench tools or low-voltage modules; not suitable for direct battery-connected automotive installations. | Select when system uses regulated 5 V only and cost is prioritized over automotive-grade robustness. |
| NXP TJA1054T | Pin-compatible replacement with identical SO-8 footprint; wider VBB range (5–27 V); higher ESD (8 kV HBM); no internal VDD regulator. | Direct drop-in upgrade path for legacy MC33290DR2 designs needing extended voltage margin and improved EMC performance. | Choose for new designs requiring longer lifecycle support and enhanced transient immunity without layout change. |
Compared with STL9200CD, MC33290DR2 delivers true dual-supply operation and automotive-grade fault protection; versus TJA1054T, it offers lower standby current (50 µA vs. 100 µA) but narrower VBB range - making MC33290DR2 optimal for cost-sensitive, battery-powered OBD tools where thermal shutdown hysteresis and ratio-metric inputs are critical.
Availability
MC33290DR2 is available at Aetrix Electronics and suitable for automotive diagnostic tools, ECU programming interfaces, and telematics gateways requiring stable component supply, long-term automotive qualification, and ISO 9141 physical layer compliance.
Supply support for MC33290DR2 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 SMARTMOS process technology and AEC-Q100-qualified products.
The MC33290DR2 belongs to Freescale's ISO physical layer interface product line, engineered specifically for On-Board Diagnostic (OBD-II) systems compliant with ISO 9141-2, emphasizing fault resilience, wide supply tolerance, and seamless integration with 5 V microcontrollers.
FAQ
What is the primary function of the MC33290DR2 in an automotive diagnostic system?
The MC33290DR2 serves as the ISO 9141 K-line physical layer interface, translating 5 V CMOS logic signals from a microcontroller to battery-level (8–18 V) K-line bus voltages and vice versa. It handles bidirectional half-duplex communication, provides short-circuit and thermal protection, and ensures compliance with CARB-mandated OBD-II timing and voltage thresholds - all critical for reliable diagnostic tool-to-ECU interaction.
Does the MC33290DR2 support both ISO 9141-2 and ISO 14230-4 (KWP2000) protocols?
The MC33290DR2 is explicitly designed and specified for ISO 9141-2 physical layer compliance, including its voltage thresholds, rise/fall times, and bus drive characteristics. While KWP2000 shares the same K-line physical medium, the MC33290DR2 datasheet does not validate timing or protocol-layer features required for KWP2000 fast-initialization sequences - protocol handling remains the responsibility of the connected microcontroller.
Can the MC33290DR2 operate with a 3.3 V microcontroller?
No - the MC33290DR2 requires VDD between 4.75 V and 5.25 V and defines all logic thresholds (e.g., VIH(CEN), VIH(TX)) as ratios of VDD. Driving TX or CEN with 3.3 V violates the minimum 0.7×VDD (≥3.325 V) high-threshold requirement and risks unreliable enable or transmit behavior; a level shifter or 5 V supply rail is mandatory for interface integrity.
What is the significance of the NC pin (Pin 2) on the MC33290DR2?
Pin 2 of the MC33290DR2 is designated NC (No Connect) and must remain unconnected on the PCB. The datasheet explicitly states it is not guaranteed to be an open circuit and may be internally floating or bonded - any connection risks unpredictable behavior or damage. Layout guidelines require leaving this pad un-routed and un-soldered, consistent with Freescale's SOICN package implementation.
How does the MC33290DR2 handle reverse battery conditions?
The MC33290DR2 itself does not include reverse-battery protection circuitry. Per the datasheet's Simplified Application Diagram, reverse polarity protection is implemented externally using a series blocking diode on the VBB line. This diode prevents current flow into VBB during reverse connection, safeguarding the IC - a mandatory design step since the device's absolute maximum VBB rating is only –0.3 V.
MC33290DR2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- -
- Interface:
- Serial
- Voltage - Supply:
- 8V ~ 18V
- Supplier Device Package:
- 8-SOIC
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
MC33290DR2 FAQ
1.How can I place an order for MC33290DR2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC33290DR2 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 MC33290DR2 reliable?
The price and inventory of MC33290DR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC33290DR2 is usually 5 days.
3.What payment methods are accepted for MC33290DR2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC33290DR2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC33290DR2?
MC33290DR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC33290DR2 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 MC33290DR2?
For technical support, including MC33290DR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC33290DR2 requirements.
6.How does Aetrix verify that MC33290DR2 is sourced from the original manufacturer or authorized distributors?
All MC33290DR2 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 MC33290DR2 meets industry standards.
7.What is the process for return or replacement of MC33290DR2?
All MC33290DR2 units undergo pre-shipment inspection (PSI). If there is an issue with MC33290DR2, 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 MC33290DR2 part is unused and in its original packaging.
Return procedure for MC33290DR2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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