Smart card interface – Rainbow Electronics AT89C5122 User Manual
Page 189
189
AT8xC5122/23
4202E–SCR–06/06
Smart Card Interface
Card VCC 5V (for IEC7816-3 Class A cards)
Symbol
Parameter
Min
Typ
Max
Unit
Test Conditions
Vcc
Power Supply
3.0
5.5
V
CI
CC_ovf
Card Supply Current overflow
100
mA
CV
CC
Card Supply Voltage
4.6
5.4
V
V
cc
Min = 4.0V, CI
CC
= 60 mA
V
cc
Min = 3.0V, CI
CC
= 30 mA
Ripple on Card Voltage
200
mV
0 < CIcc < 60 mA
CV
CC
Card Supply Voltage during spike on Icc
4.5
5.5
Max. charge 20 nA.s
Max. duration 400 ns
Max. variation CI
CC
100 mA
T
OFF
CVcc to 0
750
μ
s
Cload=10µF, Lload=10µH
Vcard = CVcc to 0.4V
T
ON
0 to CVcc
750
μ
s
Cload=10µF, Lload=10µH
Vcard = 0V to CVcc
With Boost at 60%
Card VCC 3V Power Supply (for IEC7816-3 Class B cards)
Symbol
Parameter
Min
Typ
Max
Unit
Test Conditions
Vcc
Power Supply
3.0
5.5
V
CI
CC_ovf
Card Supply Current overflow
100
mA
CV
CC
Card Supply Voltage
2.76
3.24
V
V
cc
Min = 3.6V, CI
CC
= 55mA
V
cc
Min = 3.0V, CI
CC
= 30 mA
Ripple on Vcard
200
mV
0 < CI
CC
< 55mA
CV
CC
Card Supply Voltage during spike on Icc
2.7
3.3
V
Maxi. charge 10nA.s
Max. duration 400 ns
Max. variation CI
CC
50mA
T
OFF
CVcc to 0
750
μ
s
Cload=10µF, Lload=10µH
Vcard = CVcc to 0.4V
T
ON
0 to CVcc
750
μ
s
Cload=10µF, Lload=10µH
Vcard = 0V to CVcc
With Boost at 60%