Rainbow Electronics AT83C24NDS - Manual (Page 29)

29
4234F–SCR–10/05
AT83C24
V
OL
Output Low-voltage (I/O, C4, C8, PRES/INT)
0.05
0.4
V
V
I
OL
= -100
μA
I
OL =
-1.2 mA
V
OH
Output High Voltage (C4, C8, PRES/INT)
V
OH
on I/O depends on external pull up value
0.8 x EVCC EVCC V
EVCC from 1.6V to VCC
I
OH
= 100
μA
EI
CC
Extra Supply Current +3 mA C
L
= 100 nF
R
PRES/INT
PRES/INT weak pull-up output current 300 330 360 κΩ
Short to VSS
INT_PULLUP = 0: Internal
pull-up active.
EVCC EVCC pin not connected to a power supply Vpeak - 10 mV Vpeak Vpeak + 25 mV V
C
L
= 100 nF, EIcc = +3
mA
Vpeak on I/O from 1.6V to
VCC
EAUTO = 1:
min duration 1µs,
min frequency 0.1Hz,
spikes <50ns are filtered.
EVCC EVCC pin connected to a power supply
Vpeak -
200mV
EAUTO = 1
CLK Clock signal for AT83C24 4 48 MHz
If DCK[2:0] =0
(CLK=4MHz to 4.61MHz),
a duty cycle of 50% is
needed.
CLK Clock signal for AT83C24NDS 18 48 MHz
no constrainst on duty
cycle
Table 18. Host Interface (I/O, C4, C8, CLK, A2, A1, A0, CMDVCC, PRES/INT) (Continued)
Symbol Parameter Min Typ Max Unit Test Conditions
Table 19. Host Interface (SCL, SDA, RESET)
Symbol Parameter Min Typ Max Unit Test Conditions
V
IL
Input Low-voltage -0.5
1.9
0.3 x VCC
V
VCC > 4.5V
VCC <= 4.5V
V
IH
Input High Voltage
3
0.7 x VCC
VCC + 0.5 V
VCC > 4.5V
VCC <= 4.5V
V
OL
Output Low-voltage 0.4 V I
OL
= -3 mA
V
HIST
Input trigger hysteresis 0.1 x VCC
Table 20. Smart Card Class A
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
120
130
130
150
mA VCC from 3 to 5.5V