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Absolute Maximum Ratings*
Operating Temperature ................................. -55°C to +125°C
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...................................................... 25.0 mA
DC Characteristics
T
= -40°C to 85°C, V
A
CC
Symbol
Parameter
V
Input Low Voltage
IL
V
Input High Voltage
IH
V
Input High Voltage
IH1
V
Output Low Voltage
OL
(Ports 1, 3)
V
Output High Voltage
OH
(Ports 1, 3)
I
Logical 0 Input Current
IL
(Ports 1, 3)
I
Logical 1 to 0 Transition Current
TL
(Ports 1, 3)
I
Input Leakage Current
LI
(Port P1.0, P1.1)
V
Comparator Input Offset Voltage
OS
V
Comparator Input Common
CM
Mode Voltage
RRST
Reset Pulldown Resistor
C
Pin Capacitance
IO
I
Power Supply Current
CC
Power Down Mode
Notes:
1. Under steady state (non-transient) conditions, I
Maximum I
OL
Maximum total I
If I
exceeds the test condition, V
OL
than the listed test conditions.
2. Minimum V
CC
= 2.0V to 6.0V (unless otherwise noted)
(1)
(2)
per port pin: 20 mA
for all output pins: 80 mA
OL
may exceed the related specification. Pins are not guaranteed to sink current greater
OL
for Power Down is 2V.
*NOTICE:
Condition
(Except XTAL1, RST)
(XTAL1, RST)
I
= 20 mA, V
= 5V
OL
CC
I
= 10 mA, V
= 2.7V
OL
CC
= -80 µA, V
= 5V ± 10%
I
OH
CC
= -30 µA
I
OH
= -12 µA
I
OH
V
= 0.45V
IN
= 5V ± 10%
V
= 2V, V
IN
CC
0 < V
< V
IN
CC
V
= 5V
CC
Test Freq. = 1 MHz, T
= 25°C
A
Active Mode, 12 MHz, V
CC
Idle Mode, 12 MHz, V
= 6V/3V
CC
P1.0 & P1.1 = 0V or V
CC
V
= 6V P1.0 & P1.1 = 0V or V
CC
V
= 3V P1.0 & P1.1 = 0V or V
CC
must be externally limited as follows:
OL
AT89C2051
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.
Min
-0.5
0.2 V
+ 0.9
CC
0.7 V
CC
2.4
0.75 V
CC
0.9 V
CC
0
50
= 6V/3V
CC
CC
Max
Units
0.2 V
- 0.1
V
CC
V
+ 0.5
V
CC
V
+ 0.5
V
CC
0.5
V
V
V
V
µA
-50
µA
-750
±10
µA
20
mV
V
V
CC
300
KΩ
10
pF
15/5.5
mA
5/1
mA
µA
100
µA
20
4-23
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