Application Circuits
Typical Application Circuits
Multidrop CAN Bus
MAX33040E
MAX33040E
MICROCONTROLLER
MICROCONTROLLER
RX
RX
Transmit Data Input. Drive TXD high to set the driver in the recessive state. Drive TXD low to set the driver in the dominant state. TXD has an internal pullup to VDD.
TXD
TXD
GPIO
GPIO
Receive Data Output. RXD is high when CANH and CANL are in the recessive state. RXD is low when CANH and CANL are in the dominant state.
RXD
RXD
Transmit Data Input. Drive TXD high to set the driver in the recessive state. Drive TXD low to set the driver in the dominant state. TXD has an internal pullup to VDD.
TXD
TXD
Standby Mode. A logic-high on STBY pin selects the standby mode. In standby mode, the transceiver is not able to transmit data and the receiver is in low power mode. A logic-low on STBY pin puts the transceiver in normal operating mode. A 39.2kΩ external resistor can be used to connect the STBY pin to ground for slow slew rate.
STBY
STBY
TRANSCEIVER 4
TRANSCEIVER 4
TRANSCEIVER 2
TRANSCEIVER 2
TRANSCEIVER 3
TRANSCEIVER 3
3.3V
3.3V
60ꭥ
60
Ω
60ꭥ
60
Ω
60ꭥ
60
Ω
60ꭥ
60
Ω
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
Shutdown Input, CMOS/TTL compatible. Drive SHDN high to put MAX33040E/MAX33041E in shutdown. SHDN has an internal pulldown resistor to GND.
SHDN
SHDN
GPIO
GPIO
