DC1851A - Schematic

5
VCC
LB
R16
330
0603
RB1
RA2
GND
E19
DZ1
8
E24
RXEN1
9
DXEN1
10
TE485_1
11
TE485_2
12
E35
VL
E20
RA2
E21
RB2
R14
10k
0603
E41
DY2
DZ2
E40
VL
32
RB2
33
RA2
34
GND
35
VL
36
LB
37
GND
APPROVED
MITCHELL LEE
Z1
DY2
DZ1
DZ2
RXEN1
RXEN2
DXEN1
DXEN2
TE485_2
B1
GND
Y1
Z1
DY2
A2
E25
24
DZ2
B2
E26
23
RXEN2
22
DXEN2
VCC
20
VDD
C2
2.2uF
25V
TP4
E36
E31
E32
VCC
C4
2.2uF
25V
TP2
VDD
FEN
TP1
CAP
CAP
TP7
SW
SW
A1
4
25
TP3
C1
470nF
25V
Z1
J5
E34
GND
VDD
VCC
C3
2.2uF
25V
A2
B2
GND
C
Y2
Z2
5
A2
4
B2
3
GND
2
H/F
DZ2
D
Y1
1
VEE
E42
GND
2
21
VCC
485/232_2
DY2
B1
26
Z2
DY1
A1
5
27
GND
TE485_1
E30
28
Y2
485/232_1
R15
10k
0603
RA1
38
RB1
Y1
VEE
7
E29
Z1
VCC
39
DY1
Y1
29
B2
SW
E16
B1
GND
6
E28
30
A2
CAP
5
Z1
E39
GND
4
A1
19
RB2
Y1
E27
B1
3
31
VCC
18
CHANNEL 2
RA2
3
E23
C
GND
B1
VCC
17
E18
R13
10k
0603
2
FEN
R12
10k
0603
A1
16
E17
1
VCC
VL
H/F
GND
VL
E22
15
DZ1
LTC2872IUHF
485/232_2
DY1
RB2
U1
E13
A1
E33
RA1
13
CHANNEL 1
GND
05/23/11
R17
330
0603
E12
GND
RB1
DATE
PRODUCTION
CHANNEL 1
C5
100nF
25V
D1
GREEN
J3
RA1
DESCRIPTION
1
Y2
1
VEE
CHANNEL 2
E38
J2
GND
REV
D2
GREEN
GND
GND
ECO
VL
J4
485/232_1
GND
1
VCC
VCC
3V - 5.5V
D
2
REVISION HISTORY
J1
VL
1.7V -VCC
VL
3
14
VCC
4
E37
Z2
J6
VL
TP5
L1 22uH
TP6
VL
GND
B
B
DXEN1
RXEN1
VL
1
2
EXT 3
GND 5
4
R1
100
JP2
VL
JP1
VL
RXEN1
6
VL
VL 1
EXT 3
2 DXEN1
GND 5
6
4
R2
100
E1
RXEN1
VL 1
EXT 3
2 TE485_1
GND 5
6
R3
100
E2
DXEN1
485/232_1
TE485_1
JP3
VL
4
JP4
VL
VL 1
EXT 3
2 485/232_1
GND 5
6
4
R4
100
E3
TE485_1
LB
VL
JP5
VL 1
EXT 3
2
GND 5
6
LB
4
R5
100
E4
485/232_1
FEN
H/F
2 H/F
GND 5
6
4
R6
100
VL
VL 1
EXT 3
2 FEN
GND 5
6
R7
100
E6
H/F
E5
LB
JP7
VL
JP6
VL 1
EXT 3
485/232_2
E7
FEN
4
DXEN2
TE485_2
VL
JP8
VL 1
EXT 3
2 485/232_2
GND 5
6
2 TE485_2
GND 5
6
4
R8
100
4
R9
100
E8
485/232_2
JP10
VL
JP9
VL 1
EXT 3
RXEN2
VL
VL 1
EXT 3
2
GND 5
6
DXEN2
4
R10
100
E9
TE485_2
JP11
VL 1
EXT 3
2
GND 5
6
RXEN2
4
R11
100
E10
DXEN2
E11
RXEN2
E15
GND
CHANNEL 1
GND
CHANNEL 2
E14
CUSTOMER NOTICE
A
REPRESENTS PROBE PADS.
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
USED TO MANUFACTURE PCB
Y1
MH1 MH3
1
NOTES: UNLESS OTHERWISE SPECIFIED,
1. ALL RESISTORS AND CAPACITORS ARE 1206.
Y2
1
TOOLING HOLES
1
MH2
1
1
MH4
1
4
TECHNOLOGY
PCB DES. MI
APP ENG. MITCHELL L.
TITLE: SCHEMATIC
SIZE
3
2
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
RS232/RS485 DUAL MULTIPROTOCOL
TRANSCEIVER WITH INTEGRATED TERMINATION
N/A
REPRESENTS STAND OFFS
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
APPROVALS
SCALE = NONE
DATE:
IC NO.
LTC2872IUHF
DEMO CIRCUIT 1851A
Wednesday, November 02, 2011
1
SHEET 1
REV.
1
OF 1
A
Similar pages