At83c26 – Rainbow Electronics AT83C26 User Manual
Page 70
70
7511B–SCR–10/05
AT83C26
Table 59. Smart Card 1, 2, 3, 4, 5 Clock (CCLK1, CCLK2, CCLK3, CCLK4, CCLK5)
Symbol
Parameter
Min
Typ
Max
Unit
Test Conditions
V
OL
Output low voltage
0.3
V
Class A: I
OL
= -200µA
Class B: I
OL
= -200µA
Class C: I
OL
= -200µA
V
OH
Output High Voltage
0.8 CVCC
V
Class A: I
OH
= 200µA
Class B: I
OH
= 200µA
Class C: I
OH
= 200µA
t
R
Rise time
16
ns
C
L
= 30pF Class A
C
L
= 30pF Class B
C
L
= 30pF Class C
t
F
Fall time
16
ns
C
L
= 30pF Class A
C
L
= 30pF Class B
C
L
= 30pF Class C
Low level voltage stability
(taking into account PCB design)
-0.25
-0.25
-0.25
0.6
0.4
0.4
V
Class A
Class B
Class C
High level voltage stability
(taking into account PCB design)
CVCC-0.5
CVCC+0.25
V
CVCC= Class A, Class B
or Class C
CCLK
Smart card clock frequency
24
MHz
Table 60. Smart Card n I/Os (CIOn, CC4n, CC8n, CRSTn) (n =1, 2, 3, 4, 5)
Symbol
Parameter
Min
Typ
Max
Unit
Test Conditions
V
IL
Input Low-voltage
-0.5
0.15 CVCC
V
V
IH
Input High Voltage
0.7 CVCC
CVCC + 0.5
V
V
OL
Output Low-voltage
0.3
V
I
OL
= -1mA
V
OH
Output High Voltage
0.8 CVCC
V
Class A: I
OH
= 20µA
Class B: I
OH
= 20µA
Class C: I
OH
= 20µA
I
IL
Input Low Current
500
µA
I
IH
Input High Current
-20
+20
μ
A
I
OS
Output Short Circuit Current
-15
+15
mA
Short to GND or CVCC
Low level voltage stability
(taking into account PCB design)
-0.25
-0.25
-0.25
0.6
0.4
0.4
V
Class A
Class B
Class C
High level voltage stability
(taking into account PCB design)
CVCC-0.5
CVCC+0.25
V
CVCC= Class A, Class B
or Class C
t
R
Rise time
100
μ
s
C
L
= 30pF Class A
C
L
= 30pF Class B
C
L
= 30pF Class C