Echelon LonWorks Router - Manual (Page 80)

CP0
CP1 CP3
RST~ CP4
32 RX
34 TX 38
28 39
Router 5000
LPT-11 Link Power
Transceiver
8
NETB
NETA
R1
10k
+3.3 V
+5 V
RXD
TXD
GND
VCC
INDUCTOR
6
9
10
4
5
NET_A
NET_B
2
1
GND
36
VDD3V3
Low drop-out
linear regulator
L1
1 mH
INPUT
+5 V OUTPUT
+3.3 V
C5
0.1 µF
C4
22 µF
V+
3
C6
100 µF
OE
10 MHz
18 pF C2
30 pF
C1
33 pF
R3
200
R2
1M
XOUT XIN
CLK
7
+5 V
23 24
GROUND GUARD
U1
U2
U3
CP2
37
C3
0.1 µF
Figure 35. Connecting a Router 5000 to an LPT-11 Link Power Transceiver
Table 16. Example Bill of Materials for the LPT-11 Circuit
Designator Value
C1 33 pF
C2 30 pF
C3, C5 0.1 µF
C4 22 µF, DCWV ≥10 V, I
ripple
≥200 mA
rms
@ 100 kHz, ESR ≤1.2 Ω
C6 100 µF, DCWV ≥63 V, I
ripple
≥100
mA
rms
@ 100 kHz
L1 1 mH, DCR ≤4 Ω, I
sat
≥200 mA, F
res
≥800 kHz
R1 10 kΩ
70 Developing a LONWORKS Router