DC1880A - Schematic

B
C
D
E
F
VL
2.9V - 5.5V
L1
1
GND
4
LINE IN
CAP
TOUT
TIN
RIN
ROUT
11
12
6
VDD
C3
R24
100
1206
COM PORT
(DB9)
GND
E17
GND
E18
GND
E15
E7
GND
COM PORT
ENABLE
VL
J11
TXn
4
OUT
5
R16
100k
RXD1
E12
VDD
ECO
REV
DESCRIPTION
APPROVED
DATE
-
2
1ST PROTOTYPE
KEITH B.
9-17-12
ADJ
SHDN
75k
GND
EXT
DB9
VL
TXn
VL
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
TXD2
GND
EXT
DB9
VL
IRQ
SDO
E6
RXD3
E5
R8
100
TXn
1206
JP4
SDI
SCK
CS
VL
TXD3
GND
EXT
DB9
VL
6
SCK
CS
E3
RXD4
E2
RXD1
TXD1
TXEN1
IRQ
SDO
RXD2
TXD2
TXEN2
VL
GND
GND
SDI
SCK
CS
RXD3
TXD3
TXEN3
RXD4
TXD4
0.2
0805
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
C13
8
VL
R22
4.99k
D13
RED
VL
OPEN
C12
10
OPEN R30
R14
R15
VL
JP7
VL
EXT
GND
IRQ
R11
100
1206
IRQ
4.99k
D8
36V
4.99k
E11
TXEN1
4.99k
OPEN
JP3
0.2
Q3
FQT7N10
D3
R28
0805
J7
1
S100
D9
36V
C20
R3
C15
L+3
6
2
I/Q3
3
OPEN
C14
10
D10
36V
L-3
4
OPEN
C/Q3
5
NC3
J3
VL
EXT
GND
TXEN2
R9
100
1206
R7
100
1206
0.2
VL
EXT
GND
TXEN3
Q4
FQT7N10
0805
S100
C21
R4
C17
R5
100
1206
E4
E1
TXEN2
TXEN3
TXEN4
7
J8
1
D11
36V
L+4
2
I/Q4
8
3
TXEN4
E8
2
1
5
4
3
I/Q4
L+4
NC4
C/Q4
L-4
D4
5
2
1
5
4
3
I/Q3
L+3
NC3
C/Q3
L-3
JP1
VL
EXT
GND
OPEN
C16
10
OPEN R32
D12
36V
L-4
4
OPEN
C/Q4
5
OPEN
NC4
JP13
J4
GND - SHIELD
0.1uF/25V
5
6
7
8
NC2
J2
VL
CUSTOMER NOTICE
APPROVALS
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT
TO DESIGN A CIRCUIT THAT MEETS CUSTOMER SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS
THE CUSTOMERS RESPONSIBILITY TO VERIFY
PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND
PRINTED CIRCUIT LAYOUT MAY SIGNIFICANTLY
AFFECT CIRCUIT PERFORMANCE OR RELIABILITY.
CONTACT LINEAR TECHNOLOGY APPLICATIONS
ENGINEERING FOR ASSISTANCE.
PCB DES. KEITH B.
9
VSS SDA
A2
SCL
A1
WP
A0
VCC
C/Q2
5
C7
U4
24LC025
4
3
2
1
NOTES: UNLESS OTHERWISE SPECIFIED
1. ALL RESISTORS ARE IN OHMS, 0603.
ALL CAPACITORS ARE IN MICROFARADS, 0603.
10
A
L-2
4
OPEN
R26
JP9
IRQ
I/Q2
3
OPEN
GND
EXT
DB9
VL
R23
680
4
L+2
2
VL
TXEN1
R13
D7
36V
C19
VL
2
4
6
8
10
12
14
J6
1
TXD4
1
3
5
7
9
11
13
3
NC1
2
1
5
4
3
TXn
CS
C/Q1
J1
S100
JP2
7
L-1
5
R2
L+1
SENSE-1
GATE1
CQ1
CQ2
L+2
SENSE-2
GATE2
VDD
SENSE+
L+3
SENSE-3
GATE3
CQ3
CQ4
L+4
SENSE-4
GATE4
TXEN4
I/Q1
4
OPEN
OPEN R31
1206
J12
DC590
D6
36V
Q2
FQT7N10
D2
R27
R6
100
TXD4
SCK
OPEN
C10
10
I/Q2
L+2
NC2
C/Q2
L-2
U1
LTC2874IFE
1uF/16V
JP8
L+1
2
3
JP12
LDO
ON
47.5k
C1
TXD3
C18
59k
R21
VL
SELECT
2
OPEN
309k
R20
3.3V
5.0V
5.5V
R10
100
5
D5
36V
R1
R19
JP11
E10
1206
S100
11
J5
1
10k
TXD1
E9
13
0805
R18
JP10
TXD2
0.2
Q1
FQT7N10
D1
R25
OPEN R29
2.9V
2
1
5
4
3
I/Q1
L+1
NC1
C/Q1
L-1
6
R17
RXD2
1
E16
C11
R12
100
TXn
IN
VL
4
L
REVISION HISTORY
1uF/50V
0805
U3
LT3012
E13
C4
K
100uF/63V
DIA=12.5mm
C2
RXDn
COM PORT
SELECT
JP6
1206
SDI
SDO
J10
J
C9
4.7uF/16V
3528
TXD1
SDO
VDD
8V - 30V
C8
1uF/16V
1uF/16V
SDI
I
GND
RXD4
RXD3
RXD2
RXD1
7
2
1
1uF/16V
3
VCC
VL
PS
MODE
LINE OUT
220nF/16V
3
10
8
9
VEE
1
6
2
7
3
8
4
9
5
DCD
DSR
RX
RTS
TX
CTS
DTR
C6
13
2
SW
C5
H
VL
10uH
U2
LTC2802
J9
GND
E14
JP5
5
G
GND
A
B
C
D
E
F
THIS CIRCUIT IS PROPRIETARY TO
LINEAR TECHNOLOGY AND SUPPLIED FOR
USE WITH LINEAR TECHNOLOGY PARTS.
G
H
TECHNOLOGY
APP ENG. KEITH B.
1630 McCarthy Blvd.
Milpitas, CA 95035
LTC CONFIDENTIAL
Phone: (408) 432-1900
FOR CUSTOMER
Fax: (408) 434-0507
USE ONLY
www.linear.com
TITLE: SCHEMATIC
QUAD INDUSTRIAL BUS MASTER CONTROLLER
SIZE
IC NO.
SCALE = NONE
I
DATE:
REV.
LTC2874IFE
DEMO CIRCUIT 1880A
N/A
Monday, October 28, 2013
J
2
SHEET
K
1
OF
L
1
9
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