Rainbow-electronics DS8024 Bedienungsanleitung PDF herunterladen (Seite 5)

DS8024

Smart Card Interface

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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

CONTROL PINS (CLKDIV1, CLKDIV2, CMDVCC, RSTIN, 5V/3V)

Input Low Voltage V

-0.3

0.3 x

Input High Voltage V

0.7 x

0.3

Input Low Current I

IL_IO

0 < V

< V

5 μA

Input High Current I

IH_IO

0 < V

< V

5 μA

Integrated Pullup Resistor R

Pullup to V

, 5V/3V only 50 85 120 k

INTERRUPT OUTPUT PIN (OFF)

Output Low Voltage V

= 2mA 0 0.3 V

Output High Voltage V

= -15μA

0.75 x

Integrated Pullup Resistor R

Pullup to V

12 20 28 k

PRES, PRES PINS

Input Low Voltage V

IL_PRES

0.3 x

Input High Voltage V

IH_PRES

0.7 x

Input Low Current I

IL_PRES

= 0V 40 μA

Input High Current I

IH_PRES

= V

40 μA

TIMING

Activation Time t

ACT

160 μs

Deactivation Time t

DEACT

80 μs

Window Start t

CLK to Card Start

Time

Window End t

160

μs

PRES/PRES Debounce Time t

DEBOUNCE

8 ms

Note 1: Operation guaranteed at T

= -40°C and T

= +85°C, but not tested.

Note 2: IDD_IC measures the amount of current used by the DS8024 to provide the smart card current minus the load.

Note 3: Guaranteed by design, but not production tested.

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Smart Card Interface 1

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