LTC1955 Linear Technology, LTC1955 Datasheet - Page 18

• Manufacturer Part Number: LTC1955
• Description: Dual Smart Card Interface
• Manufacturer: Linear Technology

LTC1955
APPLICATIO S I FOR ATIO
18
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INTERFACE
INTERFACE
COMMAND
POWER
4-WIRE
4-WIRE
INPUT
FAULT
CARD
U
U
W
Figure 7. Multiple LTC1955s Daisy Chained Together
U
4.7 F
4.7 F
4.7 F
12, 13
12, 13
12, 13
9, 10
9, 10
9, 10
23
24
27
28
26
25
29
30
32
31
23
24
27
28
26
25
29
30
32
31
23
24
27
28
26
25
29
30
32
31
1
1
1
V
GND
DV
UNDERV
FAULT
D
D
SCLK
LD
DATA
R
SYNC
ASYNC
V
GND
DV
UNDERV
FAULT
D
D
SCLK
LD
DATA
R
SYNC
ASYNC
V
GND
DV
UNDERV
FAULT
D
D
SCLK
LD
DATA
R
SYNC
ASYNC
BATT
BATT
BATT
IN
OUT
IN
IN
OUT
IN
IN
OUT
IN
CC
CC
CC
C
C
C
–
–
–
11
11
11
1 F
1 F
1 F
C
C
C
+
+
+
14
LTC1955
14
LTC1955
14
LTC1955
PRES B
PRES B
PRES B
21
21
21
PRES A
PRES A
PRES A
CPO
CPO
CPO
2
2
2
15
15
15
4.7 F
4.7 F
4.7 F
VENDOR CARD
VENDOR CARD
VENDOR CARD
VENDOR CARD
SMART CARD
SMART CARD
1955 F07
sn1955 1955fs