AT89S52
26. Absolute Maximum Ratings*
*NOTICE:
Stresses beyond those listed under “Absolute
Operating Temperature.................................. -55°C to +125°C
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
VIL
Parameter
Condition
Min
-0.5
Max
Units
Input Low Voltage
(Except EA)
0.2 VCC-0.1
0.2 VCC-0.3
VCC+0.5
VCC+0.5
0.45
V
V
V
V
V
VIL1
Input Low Voltage (EA)
Input High Voltage
-0.5
VIH
(Except XTAL1, RST)
(XTAL1, RST)
0.2 VCC+0.9
0.7 VCC
VIH1
VOL
Input High Voltage
Output Low Voltage(1) (Ports 1,2,3)
IOL = 1.6 mA
Output Low Voltage(1)
(Port 0, ALE, PSEN)
VOL1
IOL = 3.2 mA
0.45
V
IOH = -60 µA, VCC = 5V 10%
IOH = -25 µA
2.4
V
V
Output High Voltage
(Ports 1,2,3, ALE, PSEN)
VOH
0.75 VCC
0.9 VCC
2.4
IOH = -10 µA
V
IOH = -800 µA, VCC = 5V 10%
V
Output High Voltage
(Port 0 in External Bus Mode)
VOH1
I
OH = -300 µA
0.75 VCC
0.9 VCC
V
IOH = -80 µA
VIN = 0.45V
V
IIL
Logical 0 Input Current (Ports 1,2,3)
-50
µA
Logical 1 to 0 Transition Current
(Ports 1,2,3)
ITL
VIN = 2V, VCC = 5V 10%
-300
µA
ILI
Input Leakage Current (Port 0, EA)
Reset Pulldown Resistor
Pin Capacitance
0.45 < VIN < VCC
10
300
10
µA
KΩ
pF
RRST
CIO
50
Test Freq. = 1 MHz, TA = 25°C
Active Mode, 12 MHz
Idle Mode, 12 MHz
VCC = 5.5V
25
mA
mA
µA
Power Supply Current
Power-down Mode(1)
ICC
6.5
50
Notes: 1. Under steady state (non-transient) conditions, IOL must be externally limited as follows:
Maximum IOL per port pin: 10 mA
Maximum IOL 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.
29
1919C–MICRO–3/05
ATMEL [ ATMEL ]
