Can Interface; Esd Critical Components; Oem628 Esd Protection For Event And Pps Strobes Schematic; Oem628 Led Drive Buffer For Error And Pv Signals Schematic - Novatel OEM6 Series User Manual

Figure 63: OEM628 ESD Protection for EVENT and PPS Strobes Schematic
OEM628_EVENT1
P1500, pin 8
OEM628_PPS
P1500, pin 4
3V3
Designator
FFB100, FB101 TDK
U100
U101
C101, C102
The ERROR and PV signals are generally used on enclosure products to control a status LED. These
signals have low drive strengths and require a buffer to drive an LED. A simple buffer circuit is shown
below.
Figure 64: OEM628 LED Drive Buffer for ERROR and PV Signals Schematic
OEM628_PVALID
P1500, pin 10
C.1.3

CAN Interface

The OEM628 provides two 2.7 V (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.
132
3V3
C100
0.1µF
R100 NNP
3V3
D
5
1
4
VCC

R101 NNP
2
U100
GND
3
74LVC1G86
R102 0
D
D
Optional PPS Buffer
Table 25: ESD Critical Components
Manufacturer
Texas Instruments
Semtech
Bourns
OnSemi
various
3V3
R100
270
D100
Green
R101
1.0K
Q100
MMBTA06
D
FB100
C101
22pF
D
D
FB101
R103
0
C102
22pF
D
Manufacturer Part Number
MMZ1005B800C
SN74LVC1G86DCK
LC03-6.TBT
CDNBS08-PLC03-6
LC03-6R2G
(22 pF 5% 50V COG 0603)
OEM628_ERROR
P1500, pin 9
OEM6 Family Installation and Operation User Manual Rev 7
EVENT1
U101
PLC03-6
1
8
IO1 IO4
2
7
GND1 GND4
3 6
GND2 GND3
4 5 D
IO2 IO3
PPS
3V3
R102
270
D101
Red
R103
1.0K
Q101
MMBTA06
D