Click here for production status of specific part numbers. Evaluates: MAX13054A MAX13054A Shield EV Kit General Description Quick Start The MAX13054A Shield is a fully assembled and tested Required Equipment PCB that demonstrates the functionality of the MAX13054A MAX13054A Shield fault-protected with extended common mode input range 5V, 500mA DC power supply and 25kV ESD Human Body Model (HBM) controller area network (CAN) transceiver. The shield features a digital Signal/function generator isolator, used as a level translator between the CAN bus Oscilloscope and the controller interface and operates from a range of 1.71V to 5.5V supply. Procedure 1) Place the MAX13054A Shield on a nonconductive Features surface to ensure that nothing on the PCB gets Integrated Protection Increases Robustness shorted to the workspace. 65V Fault Tolerant CANH and CANL 2) Set the jumpers of JU1, JU2, JU CANH, and JU 25kV ESD HBM (Human Body Model) CANL to 2-3 position. 25V Extended Common Mode Input Range (CMR) 3) Place two shunts on JU8. Transmitter Dominant Timeout Prevents Lockup a. Shunt pins 4-5 to connect TXD signal to D0 of JU6. Short-Circuit Protection b. Shunt pins 2-3 to connect RXD signal to D1 of JU6. Thermal Shutdown 4) Shunt STBY U1 and GND on JU12, 1-2 position. Family Provides Flexible Design Options 5) Place shunts on JU3, JU10, JU15, and JU20, 1-2 STBY Input for Low-Current Mode, Slow Slew position. Rate, Normal Operating Mode 6) Verify that all jumpers are in their default position as 1.62V to 5.5V Logic-Supply (V ) Range shown in Table 1. L 7) With +5V power supply disabled, connect the positive High-Speed Operation of Up to 2Mbps terminal to VCC EXT, VL EXT, and IOREF test Operating Temperature Range of -40C to +125C in points. Connect the negative terminal to the GND 8-pin SOIC Package test point. 8) Connect the positive terminal of the function generator to D1 of JU6 and negative terminal to any GND test Ordering Information appears at end of data sheet. points on the shield. 9) Turn on the +5V DC power supply. 10) Set Function generator to output a 250KHz square wave between 0V and 5V, and then enable function generator output. 11) Connect oscilloscope probes on CANH and CANL to GND test points of the Shield. Verify the difference voltage between CANH and CANL matches TXD input signal. The difference voltage should be between +1.5V and +3V in dominant mode and -120mV to +12mV in recessive mode. 12) Connect an oscilloscope probe on D0 of JU6 and verify the RXD output signal matches the TXD input signal. 319-100141 Rev 1 4/18Evaluates: MAX13054A MAX13054A Shield EV Kit outputs. The 60-60 split termination has a footprint for Detailed Description of Hardware a capacitor to reduce high frequency noise and common The MAX13054A Shield is a fully assembled and tested mode drift. If the board is evaluated in a system and is circuit board for evaluating the MAX13054A fault- connected at the end of the cable, then select the 120 protected high speed CAN transceiver (U1) with 65V (60-60) termination. The termination resistors on the of fault protection. The Shield is designed to evaluate MAX13054A Shield should be changed to a 60 with MAX13054A alone or in a CAN system. The MAX13054A optional footprint for a 100pF load, to simulate a complete Shield enables mbed or Arduino platform to communicate system load during evaluation. CANH and CANL can also on a CAN bus. The MAX14932 digital isolator is used as be left unloaded. a level translator with a 1.71V to 5.5V supply range. TXD and RXD Configuration Powering the Board Digital channel assignments for TXD and RXD are select- The MAX13054A Shield requires one power supply for 5V ed via JU8. It consists of three columns, and 14 rows. operation. The power supply can come from an external The columns labeled TXD and RXD are connected to supply or the Arduino/Mbed microcontrollers 5V supply. INA1 and OUTA1 pins on of the MAX14932FASE+ (U2), To select the external supply, shunt the JU1 VDD pin to respectively. The middle column is the digital I/O pins, VDD EXT pin option, 2-3 default position. To connect the D0 to D13. This provides flexibility for the user to select Arduino/mbed 5V supply to VDD, shunt JU1 VDD pin to different resources on the microcontroller for transmitting 5V, 1-2 position. Similarly, the V supply is selected using L and receiving signals to and from the CAN transceiver. JU2. Shunt JU2 to 2-3 position to select the external Table 2 shows the list of JU8 jumper options. supply from a range of 1.62V to 5.5V. Shunt JU2 to 1-2 position to select the Arduino/mbed 5V supply. Refer to DB9 Connector Table 1 for jumper settings. The MAX13054A Shield has a DB9 connector to CANH and CANL (pins 7 and 2, respectively). On-Board Termination A properly terminated CAN bus is terminated at each end SD Card with the characteristic impedance of the cable. For CAT5 The MAX13054A Shield has a SD card socket. The or CAT6 cables, this is typically 120 on each end for micro-SD card is connected to D10-D13 to interface with a 60 load on the CAN driver. The MAX13054A Shield Arduino/mbed board through SPI. features a selectable 60 load and a 60-60 split termination circuit between the CANH and CANL driver Maxim Integrated 2 www.maximintegrated.com