AT89C51ED2-RDTUM datasheet(114/137 Pages) ATMEL

114 / 137 page

114

4235K–8051–05/08

AT89C51RD2/ED2

25. Electrical 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 VCC to VSS ......................................-0.5V to + 6.5V

VVoltage on Any Pin to VSS .......................-0.5V to VCC + 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.

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

Typ

Max

Unit

Test Conditions

Input Low Voltage

-0.5

0.2 V

CC - 0.1

Input High Voltage except RST, XTAL1

0.2 V

CC + 0.9

CC + 0.5

IH1

Input High Voltage RST, XTAL1

0.7 V

CC + 0.5

Output Low Voltage, ports 1, 2, 3, 4 (6)

0.3

0.45

1.0

CC = 4.5V to 5.5V

OL = 100 µA

(4)

OL = 1.6 mA

(4)

OL = 3.5 mA

(4)

0.45

CC = 2.7V to 5.5V

OL = 0.8 mA

(4)

OL1

Output Low Voltage, port 0, ALE, PSEN (6)

0.3

0.45

1.0

CC = 4.5V to 5.5V

OL = 200 µA

(4)

OL = 3.2 mA

(4)

OL = 7.0 mA

(4)

0.45

CC = 2.7V to 5.5V

OL = 1.6 mA

(4)

VOH

Output High Voltage, ports 1, 2, 3, 4

VCC - 0.3

VCC - 0.7

VCC - 1.5

VCC = 5V ± 10%

IOH = -10 µA

IOH = -30 µA

IOH = -60 µA

0.9 VCC

VCC = 2.7V to 5.5V

IOH = -10 µA

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