at89c55-12qi ATMEL Corporation, at89c55-12qi Datasheet - Page 18

• Manufacturer Part Number: at89c55-12qi
• Description: 8-bit Microcontroller With Bytes Flash
• Manufacturer: ATMEL Corporation

Absolute Maximum Ratings*
DC Characteristics
The values shown in this table are valid for T
Notes: 1. Under steady state (non-transient) conditions, I
18
Symbol
V
V
V
V
V
V
V
V
I
I
I
RRST
C
I
IL
TL
LI
CC
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
IL
IL1
IH
IH1
OL
OL1
OH
OH1
IO
must be externally limited as follows:
Maximum I
Maximum I
Ports 1, 2, 3: 15 mA
Parameter
Input Low Voltage
Input Low Voltage (EA)
Input High Voltage
Input High Voltage
Output Low Voltage
(Ports 1, 2, 3)
Output Low Voltage
(Port 0, ALE, PSEN)
Output High Voltage
(Ports 1, 2, 3, ALE, PSEN)
Output High Voltage
(Port 0 in External Bus
Mode)
Logical 0 Input Current
(Ports 1, 2, 3)
Logical 1 to 0 Transition
Current (Ports 1, 2, 3)
Input Leakage Current
(Port 0, EA)
Reset Pulldown Resistor
Pin Capacitance
Power Supply Current
Power Down Mode
OL
OL
per port pin: 10 mA
per 8 bit port: Port 0: 26 mA,
AT89C55
(2)
(1)
(1)
Condition
(Except EA)
(Except XTAL1, RST)
(XTAL1, RST)
I
I
I
I
I
I
I
I
V
V
0.45 < V
Test Freq. = 1 MHz, T
Active Mode, 12 MHz
Idle Mode, 12 MHz
V
V
OL
OL
OH
OH
OH
OH
OH
OH
IN
IN
CC
CC
= 1.6 mA
= 3.2 mA
A
= -60 A, V
= -25 A
= -10 A
= -800 A, V
= -300 A
= -80 A
= 0.45V
= 2V
= 6V
= 3V
= -40°C to 85°C and V
IN
< V
OL
CC
CC
CC
= 5V
= 5V
2. Minimum V
*NOTICE: Stresses beyond those listed under “Absolute Maxi-
A
Maximum total I
If I
specification. Pins are not guaranteed to sink current greater
than the listed test conditions.
= 25°C
mum Ratings” may cause permanent damage to the device.
This is a stress rating only and functional operation of the
device at these or any other conditions beyond those indi-
cated in the operational sections of this specification is not
implied. Exposure to absolute maximum rating conditions
for extended periods may affect device reliability.
OL
10%
10%
CC
exceeds the test condition, V
= 5.0V
CC
0.2 V
for Power Down is 2V.
0.75 V
0.75 V
OL
0.9 V
0.9 V
0.7 V
Min
-0.5
-0.5
CC
2.4
2.4
for all output pins: 71 mA
50
20%, unless otherwise noted.
CC
CC
CC
+ 0.9
CC
CC
0.2 V
0.2 V
OL
V
V
CC
CC
may exceed the related
Max
-650
0.45
0.45
300
100
-50
6.5
CC
CC
10
25
40
10
+ 0.5
+ 0.5
- 0.1
- 0.3
Units
mA
mA
k
pF
V
V
V
V
V
V
V
V
V
V
V
V
A
A
A
A
A