LTC1955EUH Linear Technology, LTC1955EUH Datasheet - Page 3

• 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

ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifi cations are at T
PARAMETER
I
I
Charge Pump
R
CPO Turn-On Time
Smart Card Supplies V
V
V
Undervoltage Detection
Overcurrent Detection
Smart Card Detection
Debounce Time (
PRES A, PRES B Pull-Up Current
Deactivation Time (
CLK A, CLK B
Low Level Output Voltage (V
High Level Output Voltage (V
Rise/Fall Time (Note 2)
CLK A, CLK B Frequency (Note 2)
RST A, RST B, C4A, C8A
Low Level Output Voltage (V
High Level Output Voltage (V
Rise/Fall Time (Note 2)
I/O A, I/O B
Low Level Output Voltage (V
High Level Output Voltage (V
Rise/Fall Time (Note 2)
Short-Circuit Current (Note 2)
DATA
Low Level Output Voltage (V
High Level Output Voltage (V
Rise/Fall Time
R
Low Input Threshold (V
High Input Threshold (V
Input Current (I
DVCC
DVCC
OLCP
CCA/B
CCA/B
IN
, D
Operating Current
Shutdown Current
IN
5V Mode Open-Loop Output Resistance
Output Voltage
Turn-On Time
, SCLK, LD, SYNC, ASYNC, NC/NO
IH
/I
IL
)
PRES A/B to
RST to V
CCA
IL
IH
)
)
, V
OL
OL
OL
OL
OH
OH
OH
OH
CCB
), (Note 2)
), (Note 2)
), (Note 2)
)
), (Note 2)
), (Note 2)
), (Note 2)
)
CC
= 0.4V)
D15/D7)
CONDITIONS
V
I
5V Mode, 0 < I
3V Mode, 0 < I
1.8V Mode, 0 < I
I
Relative to Nominal Output
5V Mode
V
V
I
Sink Current = –200μA
Source Current = 200μA
Loaded with 50pF , 10% to 90%
Sink Current = –200μA
Source Current = 200μA
Loaded with 50pF , 10% to 90%
Sink Current = –1mA (V
Source Current = 20μA (V
Loaded with 50pF , 10% to 90%
V
Sink Current = –500μA (V
Source Current = 20μA (V
Loaded with 50pF , 10% to 90%
CCA/B
CCA/B
CCA/B
BATT
NC/NO
PRESA/B
DATA
= 3.075V, I
= 0V
= 0mA, 10% to 90%
= 0mA, 10% to 90%
= 0mA, C
= 0V
A
= 0
= 25°C. V
CCA/B
CCA/B
The
VCCA/B
CPO
CCA/B
= I
< 60mA
< 50mA
l
PVBATT
< 30mA
= 1μF
denotes the specifi cations which apply over the full operating
CCA
DATA
I/OA/B
DATA
I/OA/B
+ I
= V
= 0V)
CCB
= V
= 0V)
= V
SVBATT
= 120mA (Note 3)
DVCC
CCA/B
)
= 3.3V, DV
)
CC
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
= 3.3V, unless otherwise noted.
0.85 • V
V
V
0.85 • DV
0.8 • DV
CCA/B
CCA/B
MIN
4.65
2.75
1.65
–9
65
20
10
–1
– 0.2
– 0.2
CCA/B
CC
CC
1.25
TYP
100
0.5
5.7
0.6
1.8
0.8
10
–5
35
20
5
3
5
LTC1955
0.15 • DV
MAX
5.35
3.25
1.95
–2.5
135
250
100
500
500
1.5
8.5
1.5
1.5
2.5
0.2
0.2
0.3
0.3
25
60
16
10
1
CC
UNITS
1955fb
3
MHz
mA
mA
ms
ms
ms
μA
μA
μA
μA
μs
ns
ns
ns
ns
Ω
%
V
V
V
V
V
V
V
V
V
V
V
V
V