AT89C51RB2/RC2
Electrical Characteristics
Absolute Maximum Ratings
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 func-
tional operation of the device at these or any other
conditions above those indicated in the operational
sections of this specification is not implied. Expo-
sure to absolute maximum rating conditions may
affect device reliability.
C = commercial......................................................0°C to 70°C
I = industrial ........................................................-40°C to 85°C
Storage Temperature .................................... -65°C to + 150°C
Voltage on VCC to VSS (standard voltage).........-0.5V to + 6.5V
Voltage on VCC to VSS (low voltage)..................-0.5V to + 4.5V
Voltage on Any Pin to VSS..........................-0.5V to VCC + 0.5V
Power Dissipation.............................................................. 1 W
Power dissipation value is based on the maximum
allowable die temperature and the thermal resis-
tance of the package.
DC Parameters for
Standard Voltage
TA = -40°C to +85°C; VSS = 0V;
VCC =2.7V to 5.5V and F = 0 to 40 MHz (both internal and external code execution)
VCC =4.5V to 5.5V and F = 0 to 60 MHz (internal code execution only)
Symbol Parameter
Min
-0.5
Typ
Max
Unit Test Conditions
VIL
Input Low Voltage
0.2 VCC - 0.1
VCC + 0.5
VCC + 0.5
V
VIH
Input High Voltage except RST, XTAL1
Input High Voltage RST, XTAL1
0.2 VCC + 0.9
0.7 VCC
V
(9)
VIH1
V
VCC = 4.5V to 5.5V
0.3
0.45
1.0
V
V
V
IOL = 100 μA(4)
IOL = 1.6 mA(4)
IOL = 3.5 mA(4)
VOL
Output Low Voltage, ports 1, 2, 3, 4 (6)
VCC = 2.7V to 5.5V
IOL = 0.8 mA(4)
0.45
V
VCC = 4.5V to 5.5V
IOL = 200 μA(4)
IOL = 3.2 mA(4)
IOL = 7.0 mA(4)
0.3
0.45
1.0
V
V
V
VOL1
Output Low Voltage, port 0, ALE, PSEN (6)
VCC = 2.7V to 5.5V
IOL = 1.6 mA(4)
0.45
V
VCC = 5V 10%
IOH = -10 μA
IOH = -30 μA
IOH = -60 μA
VCC - 0.3
VCC - 0.7
VCC - 1.5
V
V
V
VOH
Output High Voltage, ports 1, 2, 3, 4
VCC = 2.7V to 5.5V
0.9 VCC
V
IOH = -10 μA
107
4180E–8051–10/06
ATMEL [ ATMEL ]
