User`s guide

LONWORKS LPT-10 Transceiver User’s Guide 2-13
NET_A
NET_B
T1
T2
VCC
CLK
GND
TXEN
CLKSEL0
RX_ACTIVE
RXD
TXD/CLKSEL1
~RESET
Notes:
1. Repeater must operate at 2.5MHz. This can be accomplished by dividing down a 5.0MHz oscillator
with a flip/flop.
2. Observe polarity shown for C11, C12, C21, C22, C31, and C32.
3. C11, C12, C21, C22, C31 and C32 are required only for connection to link power networks.
C11
C12
See Note 4
C18
FTT-10
C14 C13
C15
+
+
+5V
(spark gaps)
See Notes 2 and 3
D13B D14B
D13A D14A
~SLEEP
CLK
~RESET
TXEN
CLKSEL0
RX_ACTIVE
RXD
TXD/CLKSEL1
NET_A
NET_B
VCC
GND
To/From
Network
Segment 1
WAKEUP_CAP
WAKEUP_OUTNC
V+
INDUCTOR
+5V
C3 C2 C1
L1
LVI
+5V
+5V
RxD1
RxA1
RxD2
RxA2
RxD1
RxA1
RxD3
RxD0
RxA3
RxA0
TxD/CS1
TxEn
Clk
TxEn
TxD/CS1
Clk
~Reset
RxD0
RxA0
See Note 5
See Note 5
TxD/CS1
TxEn
Clk
~Reset
5.0 MHz
Osc
D
F/F
Q
~Q
NC
See Note 1
LPT-10
D11B D11A
D12A D12B
Rr
Rr
To/From
Network
Segment 2
Figure 2.6a Four-Way Repeater Schematic (page 1 of 2)