AT89S52_08 datasheet(29/38 Pages) ATMEL

Part #	AT89S52

Description	8-bit Microcontroller with 8K Bytes In-System Programmable Flash

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Manufacturer	ATMEL [ATMEL Corporation]

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29

1919D–MICRO–6/08

AT89S52

Notes:

1. Under steady state (non-transient) conditions, I

OL must be externally limited as follows:

Maximum IOL 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 VCC 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 T

A = -40°C to 85°C and VCC = 4.0V to 5.5V, unless otherwise noted.

Symbol

Parameter

Condition

Min

Max

Units

V

IL

Input Low Voltage

(Except EA)

-0.5

0.2 V

CC-0.1

V

IL1

Input Low Voltage (EA)

-0.5

0.2 V

CC-0.3

V

IH

Input High Voltage

(Except XTAL1, RST)

0.2 V

CC+0.9

V

CC+0.5

V

IH1

Input High Voltage

(XTAL1, RST)

0.7 V

CC

V

CC+0.5

V

OL

Output Low Voltage(1) (Ports 1,2,3)

I

OL = 1.6 mA

0.45

V

OL1

Output Low Voltage(1)

(Port 0, ALE, PSEN)

I

OL = 3.2 mA

0.45

V

OH

Output High Voltage

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

I

OH = -60 µA, VCC = 5V ± 10%

2.4

V

I

OH = -25 µA

0.75 V

CC

V

I

OH = -10 µA

0.9 V

CC

V

OH1

Output High Voltage

(Port 0 in External Bus Mode)

I

OH = -800 µA, VCC = 5V ± 10%

2.4

V

I

OH = -300 µA

0.75 V

CC

V

I

OH = -80 µA

0.9 V

CC

V

I

IL

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

V

IN = 0.45V

-50

µA

I

TL

Logical 1 to 0 Transition Current

(Ports 1,2,3)

V

IN = 2V, VCC = 5V ± 10%

-300

µA

I

LI

Input Leakage Current (Port 0, EA)

0.45 < V

IN < VCC

±10

µA

RRST

Reset Pulldown Resistor

50

300

K

Ω

C

IO

Pin Capacitance

Test Freq. = 1 MHz, T

A = 25°C

10

pF

I

CC

Power Supply Current

Active Mode, 12 MHz

25

mA

Idle Mode, 12 MHz

6.5

mA

Power-down Mode

(1)

V

CC = 5.5V

50

µA

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