Datasheet

Electrical characteristics ST8024
12/31
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.
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
= 0.9V
CC
; C
L
= 80 pF -1 mA
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 Test conditions Min. Typ. Max. Unit
Table 12. Data lines to microcontroller (pins I/OUC, AUX1UC AND AUX2UC with integrated 11
kΩ pull-up resistor to V
DD
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
OH
High level output voltage
5 and 3 V card; I
OH
< − 40µA 0.75 V
DD
V
DD
+0.1
V
No DC Load 0.9 V
DD
V
DD
+0.1
V
OL
Low level output voltage I
OL
= 1 mA 0 0.3 V
V
IH
High level input voltage 0.7 V
DD
V
DD
+0.3 V
V
IL
Low level input voltage -0.3 0.3 V
DD
V
|I
LIH
|
High level input leakage
current
V
IH
= V
DD
10 µA
|I
L
| Low level input current V
IL
= 0 V 600 µA
R
PU
Internal pull-up resistance to
V
DD
Pull-up resistor to V
DD
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
DD
; C
L
< 30 pF;
10% to 90%
0.1 µs
I
PU
Current when pull-up active V
OH
= 0.9V
DD
; C
L
= 30 pF -1 mA
Table 13. Internal oscillator
Symbol Parameter Test conditions Min. Typ. Max. Unit
f
OSC(INT)
Frequency of internal oscillator
Inactive mode 55 140 200 kHz
Active mode 2.2 2.7 3.2 MHz