AT83C24 ATMEL Corporation, AT83C24 Datasheet - Page 34

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

Table 25. Smart Card RST (CRST pin)
Table 26. Card Presence
Table 27. TWI (SDA, SCL pins)
34
Symbol
Symbol
Symbol
R
t
t
HD;DAT
SU;DAT
V
t
CPRES
V
t
I
R
fDA
OS
OH
OL
t
F
AT83C24
Output Low-voltage
Output High Voltage
Output High Current
Rise and Fall time
Low level voltage stability
(taking into account PCB design)
High level voltage stability
(taking into account PCB design)
Parameter
CPRES weak pull-up output current
Data set-up time
Data hold time
Fall time on SDA signal
Parameter
Parameter
0.9*CVCC
CVCC-0.4
-0.25
Min
Min
Min
2.35
300
-15
4.2
20
10
0
0
Typ
Typ
Typ
10
330
0
0.12 x CVCC
CVCC+0.25
CVCC
0.50V
0.30V
0.30V
Max
Max
+15
Max
0.4
0.2
0.1
50
360
Unit
Unit
Unit
mA
µs
ns
ns
ns
V
V
V
V
I
A&B&C
I
I
B&C
I
CLASS A&B&C
Short to GND or CVCC
C
measurement between
10% and 90% of CVCC
CLASS A
CLASS B
CLASS C
CLASS A
CLASS B
CLASS C
Short to VSS
PULLUP = 1:
Internal pull-up active
Not tested
Not tested
Not tested
OL
OL
OL
OH
L
= 30pF
= -20 µA CLASS
= -200 µA CLASS A
= -200 µA CLASS
= 200 µA
Test Conditions
Test Conditions
Test Conditions
4234E–SCR–09/04