Application Circuits
Typical Application Circuit
Multidrop CAN Bus
MAX33011E/12E/14E/15E
MAX33011E/12E/14E/15E
MICROCONTROLLER
MICROCONTROLLER
RX
RX
Transmit Data Input. TXD is a CMOS/TTL compatible input from a CAN controller with an internal pullup to VDD.
TXD
TXD
GPIO
GPIO
Receive Data Output. RXD is a CMOS/TTL compatible output from the physical bus lines CANH and CANL.
RXD
RXD
Transmit Data Input. TXD is a CMOS/TTL compatible input from a CAN controller with an internal pullup to VDD.
TXD
TXD
S/STBY
S/STBY
TRANSCEIVER 4
TRANSCEIVER 4
TRANSCEIVER 2
TRANSCEIVER 2
TRANSCEIVER 3
TRANSCEIVER 3
1.8V
1.8V
5V
5V
60ꭥ
60
Ω
Logic Supply Input. VL is the logic supply voltage for the input/output between the CAN transceiver and controller. VL allows full compatibility from +1.62V to +5.5V logic on all digital lines. Bypass to GND with a 0.1µF capacitor. Connect VL to VDD for 5V logic compatibility.
VL
V
L
Supply Voltage. Bypass VDD to GND with a 0.1µF capacitor.
VDD
V
DD
47nF
47nF
47nF
47nF
0.1µF
0.1µF
0.1µF
0.1µF
Fault Detected Indication. Stays low when fault is not detected. Release to high if an overcurrent, overvoltage, or transmission failure is detected.
FAULT
FAULT
Loopback Mode. When connected to logic-high, the transmitter and receiver are placed in a high-impedance state. Internally, the TXD line drives directly to the RXD line for loopback that can be used for self-diagnostic of the transceiver without disturbing the bus. When loopback mode is not used, connect to GND or leave floating.
LPBK
LPBK
GPIO
GPIO
GPIO
GPIO
60ꭥ
60
Ω
60ꭥ
60
Ω
60ꭥ
60
Ω
