DS8024 datasheet(5/15 Pages) MAXIM

5 / 15 page

Smart Card Interface

RECOMMENDED DC OPERATING CONDITIONS (continued)

(VDD = +3.3V, VDDA = +5.0V, TA = +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

VIL

-0.3

0.3 x

VDD

Input High Voltage

VIH

0.7 x

VDD

VDD +

0.3

Input Low Current

IIL_IO

0 < VIL < VDD

μA

Input High Current

IIH_IO

0 < VIH < VDD

μA

Integrated Pullup Resistor

RPU

Pullup to VDD, 5V/

3V only

120

INTERRUPT OUTPUT PIN (OFF)

Output Low Voltage

VOL

IOL = 2mA

0.3

Output High Voltage

VOH

IOH = -15μA

0.75 x

VDD

Integrated Pullup Resistor

RPU

Pullup to VDD

PRES, PRES PINS

Input Low Voltage

VIL_PRES

0.3 x

VDD

Input High Voltage

VIH_PRES

0.7 x

VDD

Input Low Current

IIL_PRES

VIL_PRES = 0V

μA

Input High Current

IIH_PRES

VIH_PRES = VDD

μA

TIMING

Activation Time

tACT

160

μs

Deactivation Time

tDEACT

μs

Window Start

CLK to Card Start

Time

Window End

160

μs

PRES/PRES Debounce Time

tDEBOUNCE

Note 1: Operation guaranteed at TA = -40°C and TA = +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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