AT89S52-24AI datasheet(29/39 Pages) ATMEL

29 / 39 page

1919C–MICRO–3/05

AT89S52

Notes:

1. Under steady state (non-transient) conditions, IOL must be externally limited as follows:

Maximum I

OL per port pin: 10 mA

Maximum I

OL per 8-bit port:

Port 0: 26 mA

Ports 1, 2, 3: 15 mA

Maximum total IOL for all output pins: 71 mA

If IOL exceeds the test condition, VOL may exceed the related specification. Pins are not guaranteed to sink current greater

than the listed test conditions.

2. Minimum V

CC for Power-down is 2V.

26. Absolute Maximum Ratings*

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

27. DC Characteristics

The values shown in this table are valid for TA = -40°C to 85°C and VCC = 4.0V to 5.5V, unless otherwise noted.

Symbol

Parameter

Condition

Min

Max

Units

VIL

Input Low Voltage

(Except EA)-0.5

0.2 VCC-0.1

IL1

Input Low Voltage (EA)-0.5

0.2 V

CC-0.3

Input High Voltage

(Except XTAL1, RST)

0.2 V

CC+0.9

CC+0.5

VIH1

Input High Voltage

(XTAL1, RST)

0.7 VCC

VCC+0.5

Output Low Voltage

(1) (Ports 1,2,3)

OL = 1.6 mA

0.45

OL1

Output Low Voltage(1)

(Port 0, ALE, PSEN)

OL = 3.2 mA

0.45

Output High Voltage

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

OH = -60 µA, VCC = 5V ± 10%

2.4

OH = -25 µA

0.75 V

IOH = -10 µA

0.9 VCC

OH1

Output High Voltage

(Port 0 in External Bus Mode)

OH = -800 µA, VCC = 5V ± 10%

2.4

OH = -300 µA

0.75 V

IOH = -80 µA

0.9 VCC

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

IN = 0.45V

-50

µA

Logical 1 to 0 Transition Current

(Ports 1,2,3)

IN = 2V, VCC = 5V ± 10%

-300

µA

Input Leakage Current (Port 0, EA)

0.45 < V

IN < VCC

±10

µA

RRST

Reset Pulldown Resistor

300

Ω

CIO

Pin Capacitance

Test Freq. = 1 MHz, TA = 25°C

ICC

Power Supply Current

Active Mode, 12 MHz

Idle Mode, 12 MHz

6.5

Power-down Mode

(1)

CC = 5.5V

µA

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