16. 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
*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.
17. DC Characteristics
T
A
= -40°C to 85°C, V
CC
= 2.7V to 6.0V (unless otherwise noted)
Symbol
V
IL
V
IH
V
IH1
V
OL
Parameter
Input Low-voltage
Input High-voltage
Input High-voltage
Output Low-voltage
(Ports 1, 3)
Output High-voltage
(Ports 1, 3)
Logical 0 Input Current
(Ports 1, 3)
Logical 1 to 0 Transition Current
(Ports 1, 3)
Input Leakage Current
(Port P1.0, P1.1)
Comparator Input Offset Voltage
Comparator Input Common
Mode Voltage
Reset Pull-down Resistor
Pin Capacitance
Test Freq. = 1 MHz, T
A
= 25°C
Active Mode, 12 MHz, V
CC
= 6V/3V
Power Supply Current
I
CC
Power-down Mode
Notes:
Idle Mode, 12 MHz, V
CC
= 6V/3V
P1.0 & P1.1 = 0V or V
CC
V
CC
= 6V, P1.0 & P1.1 = 0V or V
CC
V
CC
= 3V, P1.0 & P1.1 = 0V or V
CC
(Except XTAL1, RST)
(XTAL1, RST)
I
OL
= 20 mA, V
CC
= 5V
I
OL
= 10 mA, V
CC
= 2.7V
I
OH
= -80
μA,
V
CC
= 5V
±
10%
V
OH
I
OH
= -30
μA
I
OH
= -12
μA
I
IL
I
TL
I
LI
V
OS
V
CM
RRST
C
IO
V
IN
= 0.45V
V
IN
= 2V, V
CC
= 5V
±
10%
0 < V
IN
< V
CC
V
CC
= 5V
0
50
2.4
0.75 V
CC
0.9 V
CC
-50
-750
±10
20
V
CC
300
10
15/5.5
5/1
100
20
Condition
Min
-0.5
0.2 V
CC
+ 0.9
0.7 V
CC
Max
0.2 V
CC
- 0.1
V
CC
+ 0.5
V
CC
+ 0.5
0.5
Units
V
V
V
V
V
V
V
µA
µA
µA
mV
V
kΩ
pF
mA
mA
µA
µA
1. Under steady state (non-transient) conditions, I
OL
must be externally limited as follows:
Maximum I
OL
per port pin: 20 mA
Maximum total I
OL
for all output pins: 80 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.
12
AT89C2051
0368H–MICRO–6/08
ATMEL [ ATMEL CORPORATION ]
