LTC1955EUH Linear Technology, LTC1955EUH Datasheet - Page 8

• Manufacturer Part Number: LTC1955EUH
• Description: IC INTERFACE DL SMART CARD 32QFN
• Manufacturer: Linear Technology

Specifications of LTC1955EUH

• Controller Type: Smart Card Interface
• Interface: 4-Wire Serial
• Voltage - Supply: 1.7 V ~ 5.5 V
• Current - Supply: 10µA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 32-QFN
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

LTC1955
BLOCK DIAGRAM
8
COMMUNICATIONS
COMMAND/STATUS
SERIAL PORT
SOCKET B
SMART
SMART
CARD
CARD
DATA
PRES B
ASYNC
CLK B
RST B
DATA
SYNC
SCLK
D
V
I/O B
OUT
CCB
R
D
LD
IN
IN
18
31
28
17
20
19
21
29
32
30
27
26
25
LDO B
COMMAND LATCH
SHIFT REGISTER
STATUS DATA
C
14
CONTROL
CONTROL
+
CHARGE
CLOCK
LOGIC
RESET
LOGIC
PUMP
C
11
–
CHARGE PUMP
PGND
10
SV
12
BATT
LDO A
PV
–
+
13
BATT
1.23V
CPO
15
+
–
22
24
23
8
5
4
3
7
6
2
9
1
1955 BD
V
I/O A
C4A
C8A
CLK A
RST A
PRES A
NC/NO
FAULT
SGND
DV
UNDERV
CCA
CC
DIGITAL
SUPPLY
SMART
CARD
SOCKET A
1955fb