Datasheet

47
3286P–MICRO–3/10
AT89S8253
Notes: 1. Under steady state (non-transient) conditions, I
OL
must be externally limited as follows:
Maximum I
OL
per port pin: 10 mA,
Maximum I
OL
per 8-bit port:15 mA,
Maximum total I
OL
for all output pins: 71 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.
29. 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
30. DC Characteristics
The values shown in this table are valid for T
A
= -40°C to 85°C and V
CC
= 2.7 to 5.5V, unless otherwise noted
Symbol Parameter Condition Min Max
V
IL
Input Low-voltage (Except EA, XTAL1, RST, Port 0) -0.5V 0.2 V
CC
- 0.1V
V
IL1
Input Low-voltage (EA, XTAL1, RST, Port 0) -0.5V 0.3 V
CC
V
IH
Input High-voltage (Except EA, XTAL1, RST, Port 0) 0.5 V
CC
V
CC
+ 0.5V
V
IH1
Input High-voltage (EA, XTAL1, RST, Port 0) 0.7 V
CC
V
CC
+ 0.5V
V
OL
Output Low-voltage
(1)
I
OL
= 10 mA, V
CC
= 4.0V, T
A
= 85°C 0.5V
V
OH
Output High-voltage
When Weak Pull Ups are Enabled
(Ports 1, 2, 3, ALE, PSEN
)
I
OH
= -60 µA, T
A
= 85°C 2.4V
I
OH
= -25 µA, T
A
= 85°C 0.75 V
CC
I
OH
= -10 µA, T
A
= 85°C 0.9 V
CC
V
OH1
Output High-voltage
When Strong Pull Ups are Enabled
(Port 0 in External Bus Mode, P1, 2, 3,
ALE, PSEN
)
I
OH
= -40 mA, T
A
= 85°C 2.4V
I
OH
= -25 mA, T
A
= 85°C 0.75 V
CC
I
OH
= -10 mA, T
A
= 85°C 0.9 V
CC
I
IL
Logical 0 Input Current (Ports 1, 2, 3) V
IN
= 0.45V, V
CC
= 5.5V, T
A
= -40°C -50 µA
I
TL
Logical 1 to 0 Transition Current (Ports
1, 2, 3)
V
IN
= 2V, V
CC
= 5.5V, T
A
= -40°C -352 µA
I
LI
Input Leakage Current (Port 0, EA) 0.45V< V
IN
< V
CC
±10 µA
RRST Reset Pull-down Resistor 50 KΩ 150 KΩ
C
IO
Pin Capacitance Test Freq. = 1 MHz, T
A
= 25°C 10 pF
I
CC
Power Supply Current
Active Mode, 12 MHz, V
CC
= 5.5V, T
A
= -40°C 10 mA
Idle Mode, 12 MHz, V
CC
= 5.5V, T
A
= -40°C 3.5 mA
Power-down Mode
(2)
V
CC
= 5.5V, T
A
= -40°C 100 µA
V
CC
= 4.0V, T
A
= -40°C 20 µA