Datasheet

Electrical characteristics ST8024
10/31
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 (Note 1).
Table 7. Step-up converter
Symbol Parameter Test conditions Min. Typ. Max. Unit
f
CLK
Clock frequency Card active 2.2 3.2 MHz
V
th(vd-vf)
Threshold voltage for step-
up converter to change to
voltage follower
5 V card 5.2 5.8 6.2
V
3 V card 3.8 4.1 4.4
V
UP(av)
Output voltage on pin V
UP
(average value)
V
CC
= 5 V 5.2 5.7 6.2
V
V
CC
= 3 V; V
DDP
= 3.3 V 3.5 3.9 4.3
Table 8. Card supply voltage characteristics
Symbol Parameter Test conditions Min. Typ. Max. Unit
C
VCC
External capacitance
on pin V
CC
Note 2 and Note 3 80 220 nF
V
CC
Card supply voltage
(including ripple
voltage)
Card Inactive; |I
CC
| = 0 mA 5 and 3V card -0.1 0 0.1
V
Card Inactive; |I
CC
| = 1 mA 5 and 3V card -0.1 0 0.3
Card Active; |I
CC
| < 80 mA 5 V card 4.75 5 5.25
Card Active; |I
CC
| < 65 mA 3 V card 2.85 3 3.15
Card Active; single current
pulse I
P
=-100 mA; t
p
=2 µs
5 V card 4.65 5 5.25
Card Active; single current
pulse I
P
=-100 mA; t
p
=2 µs
3 V card 2.76 3 3.20
Card active; current pulses,
Q
P
= 40 nAs
5 V card 4.65 5 5.25
3 V card 2.76 3 3.20
Card Active; current pulses
Q
P
=40 nAs with
|I
CC
| < 200mA, t
p
< 400 ns
5 V card 4.65 5 5.25
3 V card 2.76 3 3.20
V
CC
(RIPPLE)
(P-P)
Ripple voltage on V
CC
(Peak to Peak value)
f
RIPPLE
= 20 kHz to 200 MHz 350 mV
|I
CC
| Card supply current
V
CC
= 0 to 5V 80
mAV
CC
= 0 to 3V 65
V
CC
short circuit to GND 90 120
S
R
Slew rate Slew up or down 0.08 0.15 0.22 V/µs