Rainbow-electronics DS8024 Manual de usuario descargar pdf (Pagina 4)

DS8024

Smart Card Interface

4 _______________________________________________________________________________________

RECOMMENDED DC OPERATING CONDITIONS (continued)

= +3.3V, V

DDA

= +5.0V, T

= +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

(Note 3) 100 ns

Maximum Frequency f

IOMAX

1 MHz

Input Capacitance C

(Note 3) 10 pF

I/O, AUX1, AUX2 PINS

Output Low Voltage V

OL_IO1

OL_IO

= 1mA 0 0.3 V

Output Current I

OL_IO1

OL_IO

= 0V 0 -1 mA

Card-Inactive Mode

Internal Pullup

Resistor

PU_IO

To V

9 11 19 k

Output Low Voltage V

OL_IO2

OL_IO

= 1mA 0 0.3 V

Output High

Voltage

OH_IO2

OH_IO

= < -40μA (3V/5V) 0.75 x V

Output Rise/Fall

Time

= 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

Input Low Current I

IL_IO

= 0V 700 μA

Input High Current I

IH_IO

= V

20 μA

Input Rise/Fall Time t

(Note 3) 1.2 μs

Current Limitation I

IO(LIMIT)

= 30pF -15 +15 mA

Card-Active Mode

Current When

Pullup Active

= 80pF, V

= 0.9 x V

(Note 3)

-1 mA

I/OIN, AUX1IN, AUX2IN PINS

Output Low Voltage V

= 1mA 0 0.3 V

Output High Voltage V

< -40μA

0.75 x

0.1

Output Rise/Fall Time t

= 30pF, 10% to 90% (Note 3) 0.1 μs

Input Low Voltage V

-0.3

0.3 x

Input High Voltage V

0.7 x

0.3

Input Low Current I

IL_IO

= 0V 600 μA

Input High Current I

IH_IO

= V

10 μA

Input Rise/Fall Time t

to V

(Note 3) 1.2 μs

Integrated Pullup Resistor R

Pullup to V

9 11 13 k

Current When Pullup Active I

= 30pF, V

= 0.9 x V

(Note 3)

-1 mA

1 2 3 4 5 6 7 8 9 ... 14 15

Smart Card Interface 1

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Rainbow-electronics DS8024 Manual de usuario Pagina 4

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