Datasheet

ST8024L Electrical characteristics
Doc ID 17709 Rev 5 13/35
Table 11. Data lines to card reader (pins I/O, AUX1, and AUX2 with integrated 11 kΩ pull-up
resistor to V
CC
)
Symbol Parameter
(1)
Test conditions Min. Typ. Max. Unit
V
O(inactive)
Output voltage Inactive mode
No load 0 0.1
V
I
O(inactive)
= 1 mA 0.3
I
O(inactive)
Output current Inactive mode; pin grounded -1 mA
V
OH
High level output voltage
No DC load 0.9 V
CC
V
CC
+0.1
V
5 V and 3 V cards; I
OH
< –40 µA 0.75 V
CC
V
CC
+0.1
1.8 V card I
OH
< –40 µA 0.75 V
CC
|I
OH
| ≥ 10 mA 0 0.4
V
OL
Low level output voltage
I
OL
= 1 mA 0 0.2
V
I
OL
≥ 15 mA V
CC
–0.4 V
CC
V
IH
High level input voltage
5 V and 3 V cards 1.5 V
CC
+0.3
V
1.8 V card 0.6 V
CC
V
IL
Low level input voltage
5 V and 3 V cards 0.3 1.0
V
1.8 V card 0 0.2
|I
LIH
|
High level input leakage
current
V
IH
= V
CC
10 µA
|I
IL
| Low level input current V
IL
= 0 V 600 µA
R
PU
Integrated pull-up resistor Pull-up resistor to V
CC
91113kΩ
t
T(DI)
Data input transition time V
IL
max. to V
IH
min. 1.2 µs
t
T(DO)
Data output transition
time
V
O
= 0 to V
CC
; C
L
≤ 80 pF; 10% to
90%
0.1 µs
I
PU
Current when pull-up
active
V
OH
= 0.9 V
CC
; C
L
= 80 pF -2 mA
1. V
DD
= 3.3 V, V
DDP
= 5 V, f
XTAL
= 10 MHz, unless otherwise noted. Typical values are at T
A
= 25 °C.