Rainbow Electronics DS8024 - Manual (Page 5)

DS8024
Smart Card Interface
_______________________________________________________________________________________ 5
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
CONTROL PINS (CLKDIV1, CLKDIV2, CMDVCC, RSTIN, 5V/3V)
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 0 < V IL < V DD 5 μA
Input High Current I IH_IO 0 < V IH < V DD 5 μA
Integrated Pullup Resistor R PU Pullup to V DD , 5V/ 3V only 50 85 120 k
INTERRUPT OUTPUT PIN (OFF)
Output Low Voltage V OL I OL = 2mA 0 0.3 V
Output High Voltage V OH I OH = -15μA
0.75 x
V DD
V
Integrated Pullup Resistor R PU Pullup to V DD 12 20 28 k
PRES, PRES PINS
Input Low Voltage V IL_PRES
0.3 x
V DD
V
Input High Voltage V IH_PRES
0.7 x
V DD
V
Input Low Current I
IL_PRES
V
IL_PRES
= 0V 40 μA
Input High Current I IH_PRES V IH_PRES = V DD 40 μA
TIMING
Activation Time t ACT 160 μs
Deactivation Time t DEACT 80 μs
Window Start t 3 95 CLK to Card Start
Time
Window End t 5 160
μs
PRES/PRES Debounce Time t DEBOUNCE 8 ms
Note 1: Operation guaranteed at T
A
= -40°C and T
A
= +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.