Datasheet

ST8024 Electrical characteristics
13/31
V
DD
= 3.3 V, V
DDP
= 5 V, f
XTAL
= 10 MHz, unless otherwise noted. Typical values are to T
A
=
25 °C.
V
DD
= 3.3 V, V
DDP
= 5 V, f
XTAL
= 10 MHz, unless otherwise noted. Typical values are to
T
A
= 25 °C.
Table 14. Reset output to card reader (pin RST)
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
O(inactive)
Output voltage in inactive
mode
I
O(inactive)
= 1 mA 0 0.3
V
No Load 0 0.1
I
O(inactive)
Output current Inactive mode; pin grounded 0 -1 mA
t
D(RSTIN-RST)
RSTN to RST Delay RST Enable 2 µs
V
OL
Low level output voltage
I
OL
= 200 µA 0 0.2
V
I
OL
= 20 mA (current limit) V
CC
-0.4 V
CC
V
OH
High level output voltage
I
OH
= -200 µA 0.9V
CC
V
CC
V
I
OH
= -20 mA (current limit) 0 0.4
t
R,
t
F
Rise and fall time C
L
= 100 pF; V
CC
= 5 or 3 V 0.1 µs
Table 15. Clock output to card reader (pin CLK)
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
O(inactive)
Output voltage in inactive mode
I
O(inactive)
= 1 mA 0 0.3
V
No Load 0 0.1
I
O(inactive)
Output current
CLK Inactive mode; pin
grounded
0-1mA
V
OL
Low level output voltage
I
OL
= 200 µA 0 0.3
V
I
OL
= 70 mA (current
limit)
V
CC
-0.4 V
CC
V
OH
High level output voltage
I
OH
= -200 µA 0.9V
CC
V
CC
V
I
OH
= -70 mA (current
limit)
00.4
t
R,
t
F
Rise and fall time C
L
= 30 pF (Note 4)16ns
δ Duty factor (except for f
XTALS
)C
L
= 30 pF (Note 4)45 55%
S
R
Slew rate
Slew up or down;
C
L
= 30 pF
0.2 V/ns