LCD Display Inverter

Display Inverter / VGA Board / LCD Controller

FreescaleMC33662 Automotive LIN Bus Connectivity Solution

Freescale’s MC33662 is an automotive LIN bus, supports automotive networks, and is compatible with LIN protocol standards 1.3, 2.0, 2.1 and SAEJ2602-2CAN, operating voltage VSDUP 7-18VDC, functions up to 27VDC, can handle 40V when unloaded, LIN bus can withstand 15.0kV ESD IEC61000-4-2, WAKE pin can withstand 20kV ESD, VSUP pin can withstand 25kV ESD, target applications in automotive dashboards, HVAC, automotive lighting, door and window lift and seat control, airbags, body control Module and central gateway, driver information system and powertrain in hybrid system and LIN connection system. This paper introduces the main features of MC33662, simplified block diagram, application circuit and typical application circuit of master/slave node.

The Local Interconnect Network (LIN) is a serial communication protocol, designed to support automotive networks in conjunction with a Controller Area Network (CAN). As the lowest level of a hierarchical network, LIN enables cost-effective communication with sensors and actuators when all the features of CAN are not required. The three 33662 versions are designed to operate at different maximum baud rates. The MC33662LEF and MC33662SEF offer a normal baud rate (20 kbps), and the MC33662JEF, a slow baud rate (10 kbps). They integrate a fast baud rate (above 100 kbps), as reported by the RXD pin for test and programming modes. They provide excellent EMC (Electromagnetic Compatibility) and Radiated Emission performance, ESD (Electrostatic Discharge) robustness, and safe behavior, in the event of a LIN bus short-to-ground, or a LIN bus leakage during low-power mode.

Main features of MC33662:

•Operational from a VSUP of 7.0 to 18V DC, functional up to 27V DC, and handles 40 V during Load Dump

•Compatible with LIN Protocol Specification 1.3, 2.0, 2.1, and SAEJ2602-2

•Active bus wave shaping, offering excellent radiated emission performance

•Sustains up to 15.0 kV minimum ESD IEC61000-4-2 on the LIN Bus, 20 kV on the WAKE pin, and 25 kV on the VSUP pin

•Very high immunity against electromagnetic interference

•Low standby current in Sleep mode

•Over-temperature protection

•Local and remote Wake-up capability reported by the RXD pin

•Fast baud rate selection reported by RXD pin

•5.0 V and 3.3 V compatible digital inputs without any required external components

MC33662 target application:


Instrument Cluster

Heating Ventilation and Air Conditioning (HVAC)

Automotive Lighting

Doors, Window Lift and Seat Control


Body Control Module and Central Gateway

Body Electronics

Driver Information Systems

Powertrain and Hybrid Systems

Gasoline and Diesel Engine Management

Hybrid Electric Vehicles

Body Electronics

Driver Information Systems

Powertrain and Hybrid Systems


Local Interconnect Network (LIN)

Figure 1. Simplified block diagram of the MC33662

Figure 2. MC33662 LIN interface

Figure 3. MC33662 main LIN bus simplified application circuit diagram

Figure 4. Typical application circuit of MC33662 master node

Figure 5. MC33662 Slave Node Typical Application Circuit
For details, see: