Rainbow-electronics DS8024 Bedienungsanleitung Seite 3

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DS8024
Smart Card Interface
_______________________________________________________________________________________ 3
RECOMMENDED DC OPERATING CONDITIONS (continued)
(V
DD
= +3.3V, V
DDA
= +5.0V, T
A
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
RST PIN
Output Low Voltage V
OL_RST1
I
OL_RST
= 1mA 0 0.3 V
Card-Inactive Mode
Output Current I
OL_RST1
V
O_LRST
= 0V 0 -1 mA
Output Low Voltage V
OL_RST2
I
OL_RST
= 200μA 0 0.3 V
Output High
Voltage
V
OH_RST2
I
OH_RST
= -200μA
V
CC
-
0.5
V
CC
V
Rise Time t
R_RST
C
L
= 30pF (Note 3) 0.1 μs
Fall Time t
F_RST
C
L
= 30pF (Note 3) 0.1 μs
Shutdown Current
Threshold
I
RST(SD)
-20 mA
Current Limitation I
RST(LIMIT)
-20 +20 mA
Card-Active Mode
RSTIN to RST Delay t
D(RSTIN-RST)
2 μs
CLK PIN
Output Low Voltage V
OL_CLK1
I
OLCLK
= 1mA 0 0.3 V
Card-Inactive Mode
Output Current I
OL_CLK1
V
OLCLK
= 0V 0 -1 mA
Output Low Voltage V
OL_CLK2
I
OLCLK
= 200μA 0 0.3 V
Output High
Voltage
V
OH_CLK2
I
OHCLK
= -200μA
V
CC
-
0.5
V
CC
V
Rise Time t
R_CLK
C
L
= 30pF (Note 3) 8 ns
Fall Time t
F_CLK
C
L
= 30pF (Note 3) 8 ns
Current Limitation I
CLK(LIMIT)
-70 +70 mA
Clock Frequency f
CLK
Operational (Note 3) 0 10 MHz
Duty Factor C
L
= 30pF (Note 3) 45 55 %
Card-Active Mode
Slew Rate SR C
L
= 30pF (Note 3) 0.2 V/ns
V
CC
PIN
Output Low Voltage V
CC1
I
CC
= 1mA 0 0.3 V
Card-Inactive Mode
Output Current I
CC1
V
CC
= 0V 0 -1 mA
I
CC(5V)
< 80mA 4.75 5.00 5.25
I
CC(3V)
< 65mA 2.78 3.00 3.22
5V card: current pulses of 40nC
with I < 200mA, t < 400ns,
f < 20MHz (Note 3)
4.6 5.4
Output Low Voltage V
CC2
3V card: current pulses of 24nC
with I < 200mA, t < 400ns,
f < 20MHz (Note 3)
2.75 3.25
V
V
CC(5V)
= 0 to 5V -80
Output Current I
CC2
V
CC(3V)
= 0 to 3V -65
mA
Shutdown Current
Threshold
I
CC(SD)
120 mA
Card-Active Mode
Slew Rate V
CCSR
Up/down, C < 300nF 0.05 0.16 0.22 V/μs
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