132
OEM6 Family Installation and Operation User Manual Rev 7
Figure 63: OEM628 ESD Protection for EVENT and PPS Strobes Schematic
Table 25: ESD Critical Components
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
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.
EVENT1
OEM628_EVENT1
PPS
C102
22pF
U100
74LVC1G86
C101
22pF
R103
0
Optional PPS Buffer
P1500, pin 8
OEM628_PPS
P1500, pin 4
FB100
3V3
3V3
3V3
R100 NNP
R102 0
R101 NNP
FB101
U101
PLC03-6
IO1
GND1
GND2
IO2
IO4
GND4
GND3
IO3
1
2
3
4
1
2
4
5
3
8
7
6
5
D
D
D
D
D
D
D
VCC
GND
C100
0.1µF
Designator
Manufacturer
Manufacturer Part Number
FFB100, FB101 TDK
MMZ1005B800C
U100
Texas Instruments
SN74LVC1G86DCK
U101
Semtech
Bourns
OnSemi
LC03-6.TBT
CDNBS08-PLC03-6
LC03-6R2G
C101, C102
various
(22 pF 5% 50V COG 0603)
3V3
R101
1.0K
R100
270
D100
Green
Q100
MMBTA06
D
3V3
R103
1.0K
R102
270
D101
Red
Q101
MMBTA06
D
OEM628_PVALID
P1500, pin 10
OEM628_ERROR
P1500, pin 9