Datasheet

ST8024 Electrical characteristics
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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.
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 9. Crystal connection (pins XTAL1 and XTAL2)
Symbol Parameter Test conditions Min. Typ. Max. Unit
C
XTAL1,2
External capacitance on pins XTAIL1,
XTAIL2
Depends on type of
crystal or resonator used
15 pF
f
XTAL
Crystal frequency 2 26 MHz
f
XTAL1
Frequency applied on pin XTAL1 0 26 MHz
V
IH
High level input voltage on pin XTAIL1 0.7 V
DD
V
DD
+0.3 V
V
IL
Low level input voltage on pin XTAIL1 -0.3 +0.3V
DD
V
Table 10. Data lines (pins I/O, I/OUC, AUX1, AUX2, AUX1UC AND AUX2UC)
Symbol Parameter Test conditions Min. Typ. Max. Unit
t
D(I/O-I/OUC),
t
D(I/OUC-I/O)
I/O to I/OUC, I/OUC to I/O falling edge
delay
200 ns
t
pu
Active pull-up pulse width 100 ns
f
I/O(MAX)
Maximum frequency on data lines 1 MHz
C
I
Input capacitance on data lines 10 pF
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
V
O(inactive)
Output voltage Inactive mode
NO LOAD 0 0.1
V
I
O(inactive)
=1mA 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
V5 and 3 V cards; I
OH
< - 40µA 0.75 V
CC
V
CC
+0.1
|I
OH
| ≥ 10mA 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 1.5 V
CC
+0.3 V
V
IL
Low level input voltage 0.3 0.8 V
|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