9
AN1248.1
May 30, 2006
1
40
2
3
4
5
6
7
8
9
10
30
29
28
27
26
25
24
23
22
21
39
38
37
36
35
34
33
32
31
11
12
13
14
15
16
17
18
19
20
NC
NC
NC
C1- C1+ C2+ C2- V
CC
NC
V
L
V+
GND
GND
V-
NC (RXEN)
VHIGH
R18
R1, 3, 4, 8, 12, 15-18, 20, 24-26, 28 = 49.9
Ω
J-RXEN
C8
C11
C12
C2-5 = 0.
1
μ
F (NOT POPULATED)
V+
V-
RXEN2 (NC)
VHIGH
R17
J-RXEN2
TP12
TP10
RXEN1
VHIGH
R16
J-RXEN1
TP11
VHIGH
J-SPB
VHIGH
J-SPA (NC)
NC (DEN)
VHIGH
R12
J-(DEN)
TP9
DY1 (DZ/SLEW)
VHIGH
R20
J-(SLEW)
TP20
R14
R7, 9 = 121
Ω
(NOT POPULATED)
R13
*A2/Y2_LB
RXBIAS
J12
RXBIAS
J11
*B
2/
Z
2_LB
R11
R10
R5, 6, 10, 11 = 499
Ω
(NOT POPULATED)
R4
B2 (NC)
TP8
J-B2
J4
VLOAD
C6
C3
Y2 (NC)
TP3
C5
Z2 (NC)
TP7
VHIGH
J-SEL2
VHIGH
J-SEL1
R7
RXBIAS
B1
/Z1_LB
R5
J1
VLOAD
C1
R6
R1
B1
TP1
J-B1
C4
Y1
TP5
C2
Z1
TP2
R9
C7
RXBIAS
J9
J10
A1/Y1
_LB
A1
TP6
R3
J-A1
VCC-VL
C10
C9
C22
C13
C9, 15, 17, 22, 27 =
1
0
μ
F
P-VCC
VCC
GND
VL
P-GND
RXBIAS
VHIGH
VHIGH
RXBIAS
RXBIAS-VCC
C24
C25
C15
VL-VHIGH
C14
C23
C16
C17
VLOAD
VLOAD
C26
C27
J14
RA2(NC)
R23
R19, 22, 23, 27 = 1k
Ω
C20
VLOAD
RB1(RA)
J6
R19
VLOAD
RA1(RB)
J13
R22
C19
VLOAD
J5
TP17
R27
C21
VLOAD
VHIGH
R26
J-(ON)
RB2 (ON)
VHIGH
R28
J-DE2
DZ2/DE2 (NC)
TP21
VHIGH
R8
J-DY2
DY2 (NC)
TP19
VHIGH
R25
J-ON/OFF
ON/OFF (NC)
TP16
C18
VHIGH
R24
J-DE1
TP18
D
Z
1/
D
E
1 (
D
Y)
VHIGH
J-LB (NC)
A2 (485/232)
VHIGH
R15
J-A2 (485/232)
TP4
@
@
* Labels swapped on Rev A board
R13, 14 = 121
Ω
C1, 6-8,10-14, 16, 18-21, 23-26 = 0.
1
μ
F
(to pin 27)
Application Note 1248
