Absolute Maximum Ratings*
*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.
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
TA = -40°C to 85°C, VCC = 2.7V to 6.0V (unless otherwise noted)
Symbol
VIL
Parameter
Condition
Min
-0.5
Max
0.2 VCC - 0.1
VCC + 0.5
VCC + 0.5
0.5
Units
Input Low-voltage
Input High-voltage
Input High-voltage
V
V
V
V
VIH
(Except XTAL1, RST)
(XTAL1, RST)
0.2 VCC + 0.9
0.7 VCC
VIH1
VOL
Output Low-voltage(1)
(Ports 1, 3)
IOL = 20 mA, VCC = 5V
IOL = 10 mA, VCC = 2.7V
VOH
Output High-voltage
(Ports 1, 3)
IOH = -80 µA, VCC = 5V 10%
2.4
V
V
I
I
OH = -30 µA
OH = -12 µA
0.75 VCC
0.9 VCC
V
IIL
ITL
ILI
Logical 0 Input Current
(Ports 1, 3)
VIN = 0.45V
-50
-750
10
µA
Logical 1 to 0 Transition Current
(Ports 1, 3)
VIN = 2V, VCC = 5V 10%
0 < VIN < VCC
µA
µA
Input Leakage Current
(Port P1.0, P1.1)
VOS
VCM
Comparator Input Offset Voltage
VCC = 5V
20
mV
V
Comparator Input Common
Mode Voltage
0
VCC
RRST
CIO
Reset Pull-down Resistor
Pin Capacitance
50
300
10
KΩ
pF
Test Freq. = 1 MHz, TA = 25°C
ICC
Power Supply Current
Active Mode, 12 MHz, VCC = 6V/3V
15/5.5
5/1
mA
mA
Idle Mode, 12 MHz, VCC = 6V/3V
P1.0 & P1.1 = 0V or VCC
Power-down Mode(2)
VCC = 6V, P1.0 & P1.1 = 0V or VCC
100
20
µA
µA
VCC = 3V, P1.0 & P1.1 = 0V or VCC
Notes: 1. Under steady state (non-transient) conditions, IOL must be externally limited as follows:
Maximum IOL per port pin: 20 mA
Maximum total IOL for all output pins: 80 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.
12
AT89C2051x2
3285B–MICRO–10/03
ATMEL [ ATMEL ]
