AT83C24 ATMEL Corporation, AT83C24 Datasheet - Page 31

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

Table 20. Smart Card Class A
Notes:
4234E–SCR–09/04
Table 21. Smart Card Class B
Vcardok up Vcardok high level threshold
Symbol
CI
Vcardok
Vcardok down
down
Vcardok up
CI
CC
T
Symbol
VHL
CC
_ovf
T
T
VHL
VLH
1. Capacitor: X7R type or X5R type, max ESR value is 30m
Replacing 3.3µF by 2.2µF in parrallel with 1µF is better for ESR and noise reduction.
Parameter
Card Supply Current Capability
Card Supply Current Overflow:
ICCADJ = 0 (reset value)
ICCADJ = 1
Ripple on CVCC
Spikes on CVCC
Vcardok low level threshold
CVCC valid to 0
CVCC valid to 0
CVCC 0 to Valid
Vcardok high level threshold
Vcardok low level threshold
Spikes on CVCC
Ripple on CVCC
Parameter
Min
2.76
2.76
Min
4.75
2.8
65
65
66
66
4.6
4.8
4.6
(100kHz-100MHz),
Typ
130
140
130
400
2.9
Typ
60
150
180
500
180
240
170
110
3
4.9
4.8
4.8
60
Max
3.24
140
150
200
350
250
500
Max
200
350
250
750
250
250
300
250
5.3
Unit
mA
mA
mV
V
V
V
Unit
mV
s
V
V
V
s
s
Icard = 0, VCC
C
(see note 1)
C
VCC=3V to 5.5V,
VCC > 5.35V,
VCC from 3.0 to 5.5V
0 < Icard < 65mA C
0 < Icard < 65mA C
Maxi. charge 40 nA.s
Max. duration 400 ns
Max. variation Icard 200mA
L
L
Icard = 0, VCC
C
C
(see note 1)
VCC = 3V, C
Icard =
Icard = mA
VCC = 3V, C
Icard =
Icard = mA
0 < Icard < 60mA C
for AT83C24
0 < Icard < 65mA C
for AT83C24NDS
Max. charge 40 nA.s
Max. duration 400 ns
Max. Icard variation 200 mA
AT83C24
AT83C24NDS
= 3.3 F Icard = 0
= 10 F Icard = 0
L
L
= 3.3 F Icard = 0
= 10 F Icard = 0
Test Conditions
Test Conditions
AT83C24
mA
mA
L
L
> V
STEPREG = 1
= 3.3µF
= 10µF
> V
STEPREG=0
PFDP
L
L
PFDP
L
= 3.3µF
=10µF
L
= 3.3µF
=10µF
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