Rainbow Electronics DS8024 - Manual (Page 4)

DS8024
Smart Card Interface
4 _______________________________________________________________________________________
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
DATA LINES (I/O AND I/OIN)
I/O I/OIN Falling Edge Delay t D(IO-IOIN) (Note 3) 200 ns
Pullup Pulse Active Time t PU (Note 3) 100 ns
Maximum Frequency f IOMAX 1 MHz
Input Capacitance C I (Note 3) 10 pF
I/O, AUX1, AUX2 PINS
Output Low Voltage V
OL_IO1
I
OL_IO
= 1mA 0 0.3 V
Output Current I OL_IO1 V OL_IO = 0V 0 -1 mA
Card-Inactive Mode
Internal Pullup
Resistor
R
PU_IO
To V
CC
9 11 19 k
Output Low Voltage V
OL_IO2
I
OL_IO
= 1mA 0 0.3 V
Output High
Voltage
V OH_IO2 I OH_IO = < -40μA (3V/5V) 0.75 x V CC V CC V
Output Rise/Fall
Time
t OT C L = 30pF (Note 3) 0.1 μs
Input Low Voltage V IL_IO -0.3 +0.8
Input High Voltage V IH_IO 1.5 V CC
V
Input Low Current I IL_IO V IL_IO = 0V 700 μA
Input High Current I IH_IO V IH_IO = V CC 20 μA
Input Rise/Fall Time t IT (Note 3) 1.2 μs
Current Limitation I
IO(LIMIT)
C
L
= 30pF -15 +15 mA
Card-Active Mode
Current When
Pullup Active
I
PU
C L = 80pF, V OH = 0.9 x V DD
(Note 3)
-1 mA
I/OIN, AUX1IN, AUX2IN PINS
Output Low Voltage V OL I OL = 1mA 0 0.3 V
Output High Voltage V OH I OH < -40μA
0.75 x
V DD
V DD +
0.1
V
Output Rise/Fall Time t OT C L = 30pF, 10% to 90% (Note 3) 0.1 μs
Input Low Voltage V IL -0.3
0.3 x
V DD
V
Input High Voltage V
IH
0.7 x
V DD
V DD +
0.3
V
Input Low Current I IL_IO V IL = 0V 600 μA
Input High Current I IH_IO V IH = V DD 10 μA
Input Rise/Fall Time t IT V IL to V IH (Note 3) 1.2 μs
Integrated Pullup Resistor R PU Pullup to V DD 9 11 13 k
Current When Pullup Active I PU
C L = 30pF, V OH = 0.9 x V DD
(Note 3)
-1 mA