Can Interface; Bill Of Materials (Critical Components); Oem615 Pv Led Drive Buffer Schematic; Oem615 Can Transceiver Implementation Schematic - Novatel OEM6 Series User Manual

FB100, FB101
U101
C101, C102
A.1.3

CAN Interface

The OEM615 provides two 2.7V (3.3 V-compatible) CMOS-level CAN controller ports. An external
transceiver is required. The following figure shows a typical CAN transceiver implementation.
The combination of ferrite beads and small value capacitors are not necessarily required but may provide
improved EMI performance. A low capacitance TVS device provides ESD protection.
Figure 48: OEM615 CAN Transceiver Implementation Schematic
OEM615_CAN1TX
J1101, pin 7
OEM615_CAN1RX
J1101, pin 6
R101
22.1K-1%
Only use a 120 Ω termination resistor when the CAN device is used at one end of the CAN bus. Multiple
terminations along the length of the CAN bus will degrade performance for all CAN devices on the bus.
The slew rate adjustment resistor (R101) value in Figure 48 on page 110 sets the slew rate for
applications for SAE J1939 agricultural applications. Other applications may require a different slew rate.
Refer to the transceiver product sheet for more information.
OEM6 Family Installation and Operation User Manual Rev 7
Figure 47: OEM615 PV LED Drive Buffer Schematic
OEM615_PV
J1101, pin 17
Table 15: Bill of Materials (critical components)
Designator Manufacturer
TDK
Semtech
Bourns
OnSemi
various
3V3
U100
R100
5.1K-1%
1 3
D VCC
4 5
R VREF
8 7
RS CANH
2 6
GND CANL
TI SN65HVD231
C101
0.1µF
D
D D
3V3
R100
270
D100
Green
R101
1.0K Q100
MMBTA06
D
Manufacturer Part Number
MMZ1005B800C
LC03-6.TBT
CDNBS08-PLC03-6
LC03-6R2G
(22 pF 5% 50 V COG 0603)
FB100
U101
PLC03-6
C101 1 8
IO4
IO1
22pF
2 7
GND4
GND1
3 6
GND3
GND2
D
D 4 5
IO2 IO3
FB101
C102
22pF
D
CAN1+
120 ohm termination only
required if unit is on the
R102
end of the CAN bus
120
(not all CAN devices
require termination)
D
CAN1-
110