AT89C55WD View Datasheet(PDF) - Atmel Corporation
Part Name
Description
MFG CO.
'AT89C55WD' PDF : 35 Pages View PDF
26. 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...................................................... 15.0 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.
27. DC Characteristics
The values shown in this table are valid for TA = -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
VIL1
Input Low Voltage (EA)
-0.5
0.2 VCC-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
VOL
Output Low Voltage(1) (Ports 1,2,3)
IOL = 1.6 mA
0.45
V
VOL1
Output Low Voltage(1) (Port 0, ALE, PSEN)
IOL = 3.2 mA
0.45
V
VOH
Output High Voltage
(Ports 1,2,3, ALE, PSEN)
IOH = -60 µA, VCC = 5V ± 10%
2.4
V
IOH = -25 µA
0.75 VCC
V
IOH = -10 µA
0.9 VCC
V
IOH = -800 µA, VCC = 5V ± 10%
2.4
V
VOH1
Output High Voltage
(Port 0 in External Bus Mode)
IOH = -300 µA
0.75 VCC
V
IOH = -80 µA
0.9 VCC
V
IIL
Logical 0 Input Current (Ports 1,2,3)
VIN = 0.45V
-50
µA
ITL
Logical 1 to 0 Transition Current (Ports 1,2,3) VIN = 2V, VCC = 5V ± 10%
-650
µA
ILI
Input Leakage Current (Port 0, EA)
0.45 < VIN < VCC
±10
µA
RRST Reset Pulldown Resistor
10
30
kΩ
CIO
ICC
Notes:
Pin Capacitance
Test Freq. = 1 MHz, TA = 25°C
10
pF
Power Supply Current
Active Mode, 12 MHz
Idle Mode, 12 MHz
25
mA
6.5
mA
Power-down Mode(1)
VCC = 5.5V
100
µA
1. Under steady state (non-transient) conditions, IOL must be externally limited as follows:
Maximum IOL per port pin: 10 mA
Maximum IOL 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.
26 AT89C55WD
1921C–MICRO–3/05
Share Link: 
