Datasheet

114
4235K–8051–05/08
AT89C51RD2/ED2
25. E lectrical Characteristics
25.1 Absolute Maximum Ratings
25.2 DC Parameters for Standard Voltage
I = industrial ........................................................-40°C to 85°C
Storage Temperature .................................... -65°C to + 150°C
Voltage on V
CC
to V
SS
......................................-0.5V to + 6.5V
VVoltage on Any Pin to V
SS
.......................-0.5V to V
CC
+ 0.5V
Power Dissipation ........................................................... 1 W
(2)
Note: Stresses at or above those listed under “Absolute
Maximum Ratings” may cause permanent damage to
the device. This is a stress rating only and functional
operation of the device at these or any other condi-
tions above those indicated in the operational
sections of this specification is not implied. Exposure
to absolute maximum rating conditions may affect
device reliability.
Power dissipation is based on the maximum allow-
able die temperature and the thermal resistance of
the package.
T
A
= -40°C to +85°C; V
SS
= 0V;
V
CC
=2.7V to 5.5V and F = 0 to 40 MHz (both internal and external code execution)
V
CC
=4.5V to 5.5V and F = 0 to 60 MHz (internal code execution only)
Symbol Parameter Min Typ Max Unit Test Conditions
V
IL
Input Low Voltage -0.5 0.2 V
CC
- 0.1 V
V
IH
Input High Voltage except RST, XTAL1 0.2 V
CC
+ 0.9 V
CC
+ 0.5 V
V
IH1
Input High Voltage RST, XTAL1 0.7 V
CC
V
CC
+ 0.5 V
V
OL
Output Low Voltage, ports 1, 2, 3, 4
(6)
0.3
0.45
1.0
V
V
V
V
CC
= 4.5V to 5.5V
I
OL
= 100 µ A
(4)
I
OL
= 1.6 mA
(4)
I
OL
= 3.5 mA
(4)
0.45 V
V
CC
= 2.7V to 5.5V
I
OL
= 0.8 mA
(4)
V
OL1
Output Low Voltage, port 0, ALE, PSEN
(6)
0.3
0.45
1.0
V
V
V
V
CC
= 4.5V to 5.5V
I
OL
= 200 µ A
(4)
I
OL
= 3.2 mA
(4)
I
OL
= 7.0 mA
(4)
0.45 V
V
CC
= 2.7V to 5.5V
I
OL
= 1.6 mA
(4)
V
OH
Output High Voltage, ports 1, 2, 3, 4
V
CC
- 0.3
V
CC
- 0.7
V
CC
- 1.5
V
V
V
V
CC
= 5V ± 10%
I
OH
= -10 µ A
I
OH
= -30 µ A
I
OH
= -60 µ A
0.9 V
CC
V
V
CC
= 2.7V to 5.5V
I
OH
= -10 µ A