AT83C24 ATMEL Corporation, AT83C24 Datasheet - Page 32

• Manufacturer Part Number: AT83C24
• Description: Smart Card Reader Interface with Power Management
• Manufacturer: ATMEL Corporation

Notes:
Notes:
Table 23. Smart Card Clock (CCLK pin)
32
Table 21. Smart Card Class B
Symbol
Symbol
Table 22. Smart Card Class C
Vcardok up Vcardok high level threshold
T
V
t
V
I
R
Symbol
OS
CI
VLH
Vcardok
OH
OL
t
down
F
CI
T
T
CC
1. Capacitor: X7R type or X5R type, max ESR value is 30m
1. Capacitor: X7R type or X5R type, max ESR value is 30m
VHL
VLH
CC
_ovf
Replacing 3.3µF by 2.2µF in parrallel with 1µF is better for ESR and noise reduction.
Replacing 3.3µF by 2.2µF in parrallel with 1µF is better for ESR and noise reduction.
AT83C24
Parameter
Output Low-voltage
Output High Voltage
Short Circuit Current
Rise and Fall time
Parameter
CVCC 0 to Valid
Parameter
Card Supply Current Capability
Card Supply Current Overflow:
ICCADJ = 0 (reset value)
ICCADJ = 1
Spikes on CVCC
Vcardok low level threshold
CVCC valid to 0
CVCC 0 to valid
CVCC - 0.45
0.7CVCC
Min
-30
Min
0
Min
1.68
1.75
1.7
40
(100kHz-100MHz),
(100kHz-100MHz),
Typ
Typ
1.75
180
200
100
Typ
1.8
140
110
130
100
45
50
60
Max
1.92
300
300
150
100
CVCC
CVCC
80
Max
Max
22.5
250
250
250
250
0.4
30
16
50
Unit
mA
mA
V
V
V
Unit
s
s
s
Unit
mA
ns
VCC = 3V
Icard = 0, C
CVCC = 1.8V to 0.4V
Icard = 40mA, C
Icard = 0, C
Icard = 40mA, C
Icard = 0, C
CVCC = 0.4 to VCARDOK
V
V
VCC = 3V, C
Icard =
Icard = mA
VCC = 3V, C
Icard =
Icard = mA
Test Conditions
I
A&B&C
I
A&B
CLASS C
Short to GND or CVCC
C
C
C
measurement between
10% and 90% of CVCC
OL
OH
L =
L =
L =
Test Conditions
= -200 A CLASS
= +200 A CLASS
30 pF CLASS A
30 pF CLASS B
30 pF CLASS C
L
L
Test Conditions
L
mA
mA
= 10 F
= 3.3 F
= 10 F
L
L
L
L
= 3.3µF
= 10µF
4234E–SCR–09/04
= 10 F
= 3.3 F
(1)
(1)
(1)
(1)
(1)