AT89C51

4-37

Absolute Maximum Ratings*

DC Characteristics

Notes:

Port 0: 26 mA

Ports 1, 2, 3: 15 mA

than the listed test conditions.

Operating Temperature .................................. -55°C to +125°C

*NOTICE:

Stresses beyond those listed under “Absolute

Maximum Ratings” may cause permanent dam-

age to the device. This is a stress rating only and

functional operation of the device at these or any

other conditions beyond those indicated in the

operational sections of this specification is not

implied. Exposure to absolute maximum rating

conditions for extended periods may affect device

reliability.

Storage Temperature ..................................... -65°C to +150°C

Voltage on Any Pin

with Respect to Ground .....................................-1.0V to +7.0V

Maximum Operating Voltage............................................. 6.6V

DC Output Current...................................................... 15.0 mA

Symbol

Parameter

Condition

Min

Max

Units

Input Low Voltage

(Except EA)-0.5

V

Input Low Voltage (EA)-0.5

V

Input High Voltage

(Except XTAL1, RST)

V

Input High Voltage

(XTAL1, RST)

V

0.45

V

(Port 0, ALE, PSEN)

0.45

V

Output High Voltage

(Ports 1,2,3, ALE, PSEN)

2.4

V

V

V

Output High Voltage

(Port 0 in External Bus Mode)

2.4

V

V

V

Logical 0 Input Current (Ports 1,2,3)

-50

µA

Logical 1 to 0 Transition Current

(Ports 1,2,3)

-650

µA

±10

µA

RRST

Reset Pulldown Resistor

50

300

K

Ω

Pin Capacitance

10

pF

Power Supply Current

Active Mode, 12 MHz

20

mA

Idle Mode, 12 MHz

5

mA

100

µA

40

µA