27
1920D–MICRO–6/08
AT89C51RC
Notes:
1. Under steady state (non-transient) conditions, I
OL must be externally limited as follows:
Maximum IOL per port pin: 10 mA
Maximum I
OL 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.
27. 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...................................................... 15.0 mA
28. DC Characteristics
The values shown in this table are valid for T
A = -40°C to 85°C and VCC = 4.0V to 5.5V, unless otherwise noted.
Symbol
Parameter
Condition
Min
Max
Units
VIL
Input Low-voltage
(Except EA)
-0.5
0.2 VCC-0.1
V
IL1
Input Low-voltage (EA)
-0.5
0.2 V
CC-0.3
V
VIH
Input High-voltage
(Except XTAL1, RST)
0.2 VCC+0.9
VCC+0.5
V
VIH1
Input High-voltage
(XTAL1, RST)
0.7 VCC
VCC+0.5
V
OL
Output Low-voltag
e(1) (Ports 1,2,3)
I
OL = 1.6 mA
0.45
V
OL1
(Port 0, ALE, PSEN)
I
OL = 3.2 mA
0.45
V
VOH
Output High-voltage
(Ports 1,2,3, ALE, PSEN)
I
OH = -60 A, VCC = 5V ± 10%
2.4
V
IOH = -25 A
0.75 VCC
V
IOH = -10 A
0.9 VCC
V
VOH1
Output High-voltage
(Port 0 in External Bus Mode)
I
OH = -800 A, VCC = 5V ± 10%
2.4
V
IOH = -300 A
0.75 VCC
V
IOH = -80 A
0.9 VCC
V
IIL
Logical 0 Input Current (Ports
1,2,3)
VIN = 0.45V
-50
A
ITL
Logical 1 to 0 Transition Current
(Ports 1,2,3)
VIN = 2V, VCC = 5V ± 10%
-650
A
ILI
Input Leakage Current (Port 0, EA)0.45 < VIN < VCC
±10
A
RRST
Reset Pull-down Resistor
10
30
k
Ω
C
IO
Pin Capacitance
Test Freq. = 1 MHz, T
A = 25°C
10
pF
I
CC
Power Supply Current
Active Mode, 12 MHz
25
mA
Idle Mode, 12 MHz
6.5
mA
V
CC = 5.5V
100
A