參數(shù)資料
型號(hào): LTC1756
廠商: Linear Technology Corporation
英文描述: Smart Card Interface
中文描述: 智能卡接口
文件頁(yè)數(shù): 3/12頁(yè)
文件大?。?/td> 149K
代理商: LTC1756
3
LTC1756
ELECTRICAL CHARACTERISTICS
temperature range, otherwise specificatons are at T
A
= 25
°
C. V
IN
= 2.7V to 5.5V, unless otherwise noted.
The
G
denotes specifications which apply over the full specified
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2:
The LTC1756 is guaranteed to meet performance specifications
from 0
°
C to 70
°
C. Specifications over the –40
°
C to 85
°
C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 3:
The DATA and I/O pull-down drivers must sink up to 250
μ
A
sourced by the internal current sources.
PARAMETER
RIN, CIN, PWR, 5V/3V
High Input Voltage Threshold (V
IH
)
Low Input Voltage Threshold (V
IL
)
Input Current (I
IH
/I
IL
)
READY, CARD
Pull-Up Current (I
OH
)
Low Level Output Voltage (V
OL
)
Smart Card Input/Output I/O, V
CC
= 3V or 5V
High Input Voltage Threshold (V
IH
)
Low Input Voltage Threshold (V
IL
)
High Level Output Voltage (V
OH
)
Low Level Output Voltage (V
OL
)
Rise/ Fall Time
Short-Circuit Current
CLK
High Level Output Voltage (V
OH
)
Low Level Output Voltage (V
OL
)
CLK Rise/Fall Time
CLK Frequency
RST
High Level Output Voltage (V
OH
)
Low Level Output Voltage (V
OL
)
RST Rise/Fall Time
PRES
High Input Voltage Threshold (V
IH
)
Low Input Voltage Threshold (V
IL
)
PRES Pull-Up Current
PRES Debounce Time
CONDITIONS
MIN
TYP
MAX
UNITS
G
0.7 V
IN
0.5 V
IN
0.5 V
IN
V
V
G
0.2 V
IN
1
G
–1
μ
A
G
250
nA
V
Sink Current = –20
μ
A
G
0.3
I
IH(MAX)
=
±
20
μ
A
I
IL(MAX)
= 1mA
Source Current = 20
μ
A, DATA = V
IN
Sink Current = –1mA, DATA = 0V (Note 3)
Loaded with 30pF, 10% to 90%
Shorted to V
CC
G
0.6 V
CC
0.5 V
CC
0.5 V
CC
V
V
V
V
G
0.8
G
0.8 V
CC
G
0.3
0.5
5
G
μ
s
mA
G
3.5
Source Current = 100
μ
A
Sink Current = –200
μ
A
CLK Loaded with 30pF
CLK Loaded with 30pF
G
V
CC
– 0.5
V
V
G
0.3
16
G
ns
G
5
MHz
Source Current = 200
μ
A
Sink Current = –200
μ
A
Loaded with 30pF
G
0.8 V
CC
V
V
G
0.3
0.5
G
μ
s
G
0.7 V
IN
0.5 V
IN
0.5 V
IN
1
80
V
V
G
0.2 V
IN
V
PRES
= 0V
Proportional to the 0.68
μ
F Charge Pump Capacitor
G
0.5
40
μ
A
ms
G
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