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NXP Semiconductors MC33660BEFR2
- Part No.:
- MC33660BEFR2
- Manufacturer:
- NXP Semiconductors
- Category:
- Specialized
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MC33660BEFR2.pdf
- Description:
- IC INTERFACE SPECIALIZED 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:27,206
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Product details
Overview
MC33660BEFR2 from NXP Semiconductors is an ISO K-line serial link interface IC designed for automotive on-board diagnostics (OBD) communication between microcontrollers and external diagnostic tools via the ISO 9141-2 physical layer. It supports bi-directional half-duplex operation, operates from 8.0 V to 18 V VBB supply, withstands ±25 kV module-level ESD (air discharge), and features thermal shutdown with hysteresis at 150–170 °C. It is used in vehicle service scan tools and production-line programming interfaces.
For engineers reviewing the MC33660BEFR2 datasheet, MC33660BEFR2 pinout, MC33660BEFR2 application, or MC33660BEFR2 equivalent, key selection criteria include ISO 9141-2 compliance, battery-voltage-tolerant bus driver (ISO pin), integrated short-circuit and over-temperature protection, and SOICN-8 packaging suitable for automotive-grade PCB layouts with high-reliability transient immunity.
Technical Context
The MC33660BEFR2 implements a dedicated K-line transceiver function using SMARTMOS process technology, integrating CMOS logic, bipolar/MOS analog circuitry, and DMOS power FETs to enable robust level translation between 5 V MCU logic (VDD) and battery-referenced bus signals (VBB/ISO). Its internal active pull-down on the ISO pin provides current-limited drive capability up to 200 mA, while the TX input includes passive pull-up and RX output meets CMOS-compatible voltage thresholds.
It supports ISO 9141-2 timing requirements with guaranteed propagation delay ≤2.0 µs and fall time ≤2.0 µs under 510 Ω load and 10 nF parasitic capacitance. The device remains functional across -40 °C to +125 °C ambient temperature and survives ISO 7637-2 Pulse 5a (82 V) and Pulse 5b (45 V) load dump events when protected with external 470 Ω resistor and 100 nF capacitor on VBB.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBB Supply Range | 8.0 V to 18 V - enables direct connection to automotive battery rail without external regulation |
| Operating Temperature | -40 °C to +125 °C - qualified for under-hood and engine control module environments |
| ISO Pin Short-Circuit Current Limit | 50–200 mA - prevents latch-up and damage during bus shorts to battery or ground |
| Module-Level ESD (Air Discharge) | ±25,000 V on ISO pin with 33 V zener + 470 pF - meets ISO 10605 Level 4 for metal-enclosed modules |
| Propagation Delay (ISO) | ≤2.0 µs - ensures reliable timing compliance with ISO 9141-2 10.4 kbps nominal data rate |
| Fall Time (ISO) | ≤2.0 µs with 510 Ω + 10 nF - supports stable signal edges in noisy vehicle harnesses |
| Thermal Shutdown Threshold | 150–170 °C - protects against sustained overload or ambient overheating without latch-up |
| VDD Sleep Current | ≤0.1 mA - enables low-power diagnostic wake-up modes without draining MCU supply |
Pinout & Package
MC33660BEFR2 is housed in an 8-pin SOICN (Small Outline Integrated Circuit, Narrow) package per JEDEC MS-012, with 1.27 mm pitch and Pb-free EF suffix. The package is RoHS-compliant and rated for reflow per JEDEC J-STD-020C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VBB | Battery supply input | Accepts 8–18 V vehicle battery rail; internally protected against ISO 7637-2 Pulse 5a/b transients |
| 2 - NC | No-connect terminal | Not electrically bonded; must remain unconnected per design - no routing or grounding allowed |
| 3 - GND | Signal and power return | Common reference for VDD, VBB, ISO, TX, RX, and CEN; requires low-impedance PCB plane |
| 4 - ISO | K-line bus interface | Bi-directional half-duplex bus pin; integrates active pull-down, short-circuit limiting, and ±25 kV ESD protection |
| 5 - TX | Transmit logic input | CMOS-compatible 5 V input; internal passive pull-up ensures defined state if MCU is unpowered or floating |
| 6 - RX | Receive logic output | CMOS-compatible 5 V output; drives MCU SCIRxD directly; VOH ≥0.8×VDD, VOL ≤0.2×VDD at 250 µA sink/source |
| 7 - VDD | Digital logic supply | 5.0 V ±5% input for internal logic; draws ≤1.0 mA quiescent current and ≤0.1 mA in sleep mode |
| 8 - CEN | Chip enable control | Active-high enable; internal passive pull-down holds device in sleep mode if left un-driven |
Key Features
| Feature | Design Value |
|---|---|
| ISO K-line bus driver with short-circuit protection | Current-limited ISO output (50–200 mA) prevents damage during bus faults without external components |
| Integrated thermal shutdown with hysteresis | Auto-recovery behavior (150 °C trip / ~130 °C reset) avoids oscillation during thermal stress |
| Ratio-metric TX/RX thresholds | VIH/VIL thresholds scale with VDD, ensuring compatibility with varying MCU supply tolerances |
| Standby mode with zero VBAT current drain | VBB sleep current ≤50 µA enables always-connected diagnostic ports without battery drain |
| Robust ESD architecture for metal modules | ±25 kV air-discharge rating on ISO pin with minimal external components (zener + capacitor) |
| Load dump survival per ISO 7637-2/3 | Withstands 82 V (Pulse 5a) and 45 V (Pulse 5b) transients when protected by 470 Ω + 100 nF on VBB |
Applications
| Automotive OBD-II Diagnostic Port | Production-Line ECU Programming |
|---|---|
|
Use Scenario: Vehicle service bay connection of scan tools to OBD-II DLC (Data Link Connector) for emissions testing and fault code reading. IC Role / Device Role / Timing Role: K-line transceiver translating 5 V MCU UART signals to battery-referenced ISO 9141-2 bus levels with precise timing compliance. Use Value: Enables certified CARB-compliant diagnostics without external level shifters or discrete protection devices. |
Use Scenario: End-of-line (EOL) flashing of engine control unit firmware via factory test equipment connected to vehicle harness. IC Role / Device Role / Timing Role: Robust physical layer interface handling repeated hot-plug cycles and harness-induced transients during high-volume manufacturing. Use Value: Eliminates field failures due to ESD or load dump during automated programming, reducing test station downtime. |
| Off-Board Telematics Module | Heavy-Duty Equipment Diagnostics |
|
Use Scenario: Retrofit telematics gateway communicating with legacy ECUs via K-line in commercial fleet vehicles. IC Role / Device Role / Timing Role: Isolates MCU domain from harsh vehicle bus; provides fail-safe bus termination and fault recovery. Use Value: Extends product lifetime in mixed-voltage systems where battery voltage fluctuates from 6 V cranking to 14.8 V charging. |
Use Scenario: Diagnostic interface in agricultural tractors or construction machinery with extended temperature exposure and high EMI. IC Role / Device Role / Timing Role: High-immunity K-line driver meeting ISO 11898-3 and SAE J1939-15 physical layer robustness requirements. Use Value: Reduces need for external TVS diodes and RC filters, lowering BOM cost and board space in ruggedized enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar K-line transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC33661BEFR2 | Includes L-line driver in addition to K-line; higher pin count (14-pin SOIC); identical VBB range and ESD rating | Required only when dual-line ISO 9141-2 (K+L) diagnostics are needed; not drop-in compatible | Select MC33661BEFR2 only if L-line functionality is mandated by target vehicle platform or OEM specification |
| STB33660TR | Pin-compatible SO-8 replacement; same electrical specs but lower ESD rating (±8 kV HBM vs. ±25 kV module-level) | Suitable for non-metal-enclosed modules or applications without ISO 10605 Level 4 compliance requirement | Choose STB33660TR for cost-sensitive consumer-grade diagnostics where full automotive module-level ESD is not required |
Compared with MC33660BEFR2, MC33661BEFR2 adds L-line support but requires PCB redesign, while STB33660TR offers footprint compatibility but lacks the ±25 kV air-discharge immunity critical for metal-housed diagnostic tools.
Availability
MC33660BEFR2 is available at Aetrix Electronics and suitable for automotive OBD-II diagnostic ports, production-line ECU programming stations, and off-board telematics gateways requiring stable component supply across extended temperature and voltage extremes.
Supply support for MC33660BEFR2 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 company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.
The MC33660BEFR2 belongs to NXP's automotive interface IC portfolio, engineered specifically for ISO 9141-2 K-line diagnostics in harsh vehicle environments - emphasizing reliability, transient immunity, and seamless integration with 5 V microcontrollers.
FAQ
What is the primary function of the MC33660BEFR2 in automotive systems?
The MC33660BEFR2 serves as an ISO 9141-2 K-line physical layer transceiver, enabling half-duplex communication between a 5 V microcontroller and the vehicle's diagnostic bus. It translates logic-level signals to battery-referenced levels, provides short-circuit and thermal protection, and meets stringent automotive EMC and reliability standards - all within the MC33660BEFR2's SOICN-8 package.
Does the MC33660BEFR2 support both K-line and L-line communication?
No, the MC33660BEFR2 supports K-line only. It does not include an L-line driver. For dual-line ISO 9141-2 implementations, NXP offers the MC33661BEFR2, which integrates both K-line and L-line drivers in a 14-pin SOIC package. The MC33660BEFR2 is strictly a K-line-only solution optimized for cost and footprint in single-line diagnostic applications.
What external components are required for basic operation of the MC33660BEFR2?
For basic operation, the MC33660BEFR2 requires only a 510 Ω pull-up resistor from ISO to VBB and a reverse-battery blocking diode on VBB. For full ISO 7637-2 compliance, add a 470 Ω series resistor and 100 nF capacitor to GND on VBB. For ±25 kV module-level ESD protection, use a 33 V zener diode and 470 pF capacitor from ISO to GND - all specified in the MC33660BEFR2 datasheet.
How does the MC33660BEFR2 handle battery voltage transients like load dump?
The MC33660BEFR2 withstands ISO 7637-2 Pulse 5a (82 V) and Pulse 5b (45 V) load dump events when protected by a 470 Ω series resistor and 100 nF capacitor on the VBB pin. Its internal SMARTMOS structure provides inherent robustness, but external filtering is mandatory to keep VBB within absolute maximum ratings - a requirement explicitly validated for the MC33660BEFR2 in automotive qualification testing.
Is the MC33660BEFR2 pin-compatible with earlier versions like MC33660EF?
Yes, the MC33660BEFR2 is pin-compatible and functionally identical to MC33660EF and MC33660BEF. The "B" suffix denotes the enhanced version with improved load dump and ESD specifications, and "R2" indicates tape-and-reel packaging. All share the same SOICN-8 footprint, pinout, and logic interface - making MC33660BEFR2 a direct replacement for legacy variants in new designs.
MC33660BEFR2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- -
- Interface:
- Serial Link Bus Interface
- Voltage - Supply:
- 8V ~ 18V
- Supplier Device Package:
- 8-SOIC
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
MC33660BEFR2 FAQ
1.How can I place an order for MC33660BEFR2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC33660BEFR2 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 MC33660BEFR2 reliable?
The price and inventory of MC33660BEFR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC33660BEFR2 is usually 5 days.
3.What payment methods are accepted for MC33660BEFR2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC33660BEFR2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC33660BEFR2?
MC33660BEFR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC33660BEFR2 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 MC33660BEFR2?
For technical support, including MC33660BEFR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC33660BEFR2 requirements.
6.How does Aetrix verify that MC33660BEFR2 is sourced from the original manufacturer or authorized distributors?
All MC33660BEFR2 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 MC33660BEFR2 meets industry standards.
7.What is the process for return or replacement of MC33660BEFR2?
All MC33660BEFR2 units undergo pre-shipment inspection (PSI). If there is an issue with MC33660BEFR2, 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 MC33660BEFR2 part is unused and in its original packaging.
Return procedure for MC33660BEFR2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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