12
1001F–MICRO–6/08
AT89C4051
Notes:
1. Under steady state (non-transient) conditions, IOL must be externally limited as follows:
Maximum IOL per port pin: 20 mA
Maximum total I
OL 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 V
CC for Power-down is 2V.
16. 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...................................................... 25.0 mA
17. DC Characteristics
T
A = -40°C to 85°C, VCC = 2.7V to 6.0V (unless otherwise noted)
Symbol
Parameter
Condition
Min
Max
Units
VIL
Input Low-voltage
-0.5
0.2 VCC - 0.1
V
VIH
Input High-voltage
(Except XTAL1, RST)
0.2 VCC + 0.9
VCC + 0.5
V
IH1
Input High-voltage
(XTAL1, RST)
0.7 V
CC
V
CC + 0.5
V
VOL
(Ports 1, 3)
I
OL = 20 mA, VCC = 5V
IOL = 10 mA, VCC = 2.7V
0.5
V
VOH
Output High-voltage
(Ports 1, 3)
IOH = -80 A, VCC = 5V ± 10%
2.4
V
IOH = -30 A
0.75 VCC
V
I
OH = -12 A
0.9 V
CC
V
I
IL
Logical 0 Input Current
(Ports 1, 3)
V
IN = 0.45V
-50
A
I
TL
Logical 1 to 0 Transition Current
(Ports 1, 3)
V
IN = 2V, VCC = 5V ± 10%
-750
A
ILI
Input Leakage Current
(Port P1.0, P1.1)
0 < VIN < VCC
±10
A
VOS
Comparator Input Offset Voltage
VCC = 5V
20
mV
VCM
Comparator Input Common
Mode Voltage
0VCC
V
RRST
Reset Pulldown Resistor
50
300
K
Ω
C
IO
Pin Capacitance
Test Freq. = 1 MHz, T
A = 25°C
10
pF
ICC
Power Supply Current
Active Mode, 12 MHz, V
CC = 6V/3V
15/5.5
mA
Idle Mode, 12 MHz, VCC = 6V/3V
P1.0 & P1.1 = 0V or V
CC
5/1
mA
VCC = 6V, P1.0 & P1.1 = 0V or VCC
20
A
V
CC = 3V, P1.0 & P1.1 = 0V or VCC
5A