AT89 datasheet(31/41 Pages) ATMEL

31 / 41 page

AT89S8252

0401F–MICRO–11/03

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 I

OL for all output pins: 71 mA

If I

OL exceeds the test condition, V

OL 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

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

DC Characteristics

The values shown in this table are valid for TA = -40°C to 85°C and VCC = 5.0V ± 20%, 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

0.5

OL1

Output Low-voltage

(1)

(Port 0, ALE, PSEN)

OL = 3.2 mA

0.5

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 µA0.9 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 µA0.9 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%

-650

µA

ILI

Input Leakage Current

(Port 0, EA)

0.45 < VIN < VCC

±10

µA

RRST

Reset Pull-down Resistor

300

Ω

CIO

Pin Capacitance

Test Freq. = 1 MHz, TA = 25°C

Power Supply Current

Active Mode, 12 MHz

Idle Mode, 12 MHz

6.5

Power-down Mode

(2)

CC = 6V

100

µA

CC = 3V

µA

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