Rainbow Electronics AT83C24NDS - Manual (Page 30)

30
4234F–SCR–10/05
AT83C24
Notes: 1. Capacitor: X7R type or X5R type, max ESR value is 30m
Ω (100kHz-100MHz),
Replacing 3.3µF by 2.2µF in parrallel with 1µF is better for ESR and noise reduction.
Ripple on CVCC
60
150
200
350
mV
0 < Icard < 60mA C
L
=10µF
for AT83C24
0 < Icard < 65mA C
L
= 3.3µF
for AT83C24NDS
Spikes on CVCC 4.6 5.3 V
Max. charge 40 nA.s
Max. duration 400 ns
Max. Icard variation 200 mA
Vcardok up Vcardok high level threshold 4.8 4.9 V
Vcardok down Vcardok low level threshold
4.6
4.75
4.8
4.8
V
AT83C24
AT83C24NDS
T
VHL
CVCC valid to 0
180
500
250
750
μs
Icard = 0, VCC > V
PFDP
C
L
= 3.3
μ
F Icard = 0
C
L
= 10
μ
F Icard = 0
(see note 1)
T
VLH
CVCC 0 to Valid
180
110
240
170
250
250
300
250
μs
VCC = 3V, C
L
= 3.3µF
Icard =
65mA
Icard = 0mA
VCC = 3V, C
L
= 10µF
Icard =
65mA
Icard =
0mA
Table 20. Smart Card Class A
Symbol Parameter Min Typ Max Unit Test Conditions
Table 21. Smart Card Class B
Symbol Parameter Min Typ Max Unit Test Conditions
CI
CC
Card Supply Current Capability
65
65
mA
VCC=3V to 5.5V, STEPREG=0
VCC > 5.35V, STEPREG = 1
CI
CC
_ovf
Card Supply Current Overflow:
ICCADJ = 0 (reset value)
ICCADJ = 1
66
66
130
140
140
150
mA VCC from 3.0 to 5.5V
Ripple on CVCC 60
200
350
mV
0 < Icard < 65mA C
L
=10µF
0 < Icard < 65mA C
L
= 3.3µF
Spikes on CVCC 2.76 3.24 V
Maxi. charge 40 nA.s
Max. duration 400 ns
Max. variation Icard 200mA
Vcardok up Vcardok high level threshold 2.8 3 V
Vcardok
down
Vcardok low level threshold 2.76 2.9 V
T
VHL
CVCC valid to 0
130
400
250
500
μs
Icard = 0, VCC > V
PFDP
C
L
= 3.3
μ
F Icard = 0
(see note 1)
C
L
= 10
μ
F Icard = 0