AT89C55-24JI Atmel, AT89C55-24JI Datasheet - Page 18

• Manufacturer Part Number: AT89C55-24JI
• Description: Microcontrollers (MCU) 80C31 w/20k
• Manufacturer: Atmel

Specifications of AT89C55-24JI

• Data Bus Width: 8 bit
• Program Memory Type: Flash
• Program Memory Size: 20 KB
• Data Ram Size: 256 B
• Interface Type: UART
• Maximum Clock Frequency: 24 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 3
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: PLCC-44
• Minimum Operating Temperature: - 40 C
• Lead Free Status / Rohs Status: No

Absolute Maximum Ratings*
DC Characteristics
The values shown in this table are valid for T
Notes:
4-186
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
Symbol
V
V
V
V
V
V
V
V
I
I
I
RRST
C
I
IL
TL
LI
CC
OL
OL1
OH
OH1
IL
IL1
IH
IH1
IO
1. Under steady state (non-transient) conditions, I
2. Minimum V
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
Maximum I
the test condition, V
test conditions.
OL
CC
per 8-bit port: Port 0: 26 mA, Ports 1, 2, 3: 15 mA. Maximum total I
for Power Down is 2V.
(2)
(1)
(1)
AT89C55
OL
may exceed the related specification. Pins are not guaranteed to sink current greater than the listed
A
= -40°C to 85°C and V
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
OL
= 1.6 mA
= 3.2 mA
= -60 A, V
= -25 A
= -10 A
= -800 A, V
= -300 A
= -80 A
= 0.45V
= 2V, V
= 6V
= 3V
must be externally limited as follows: Maximum I
IN
< V
CC
= 5V
CC
CC
CC
*NOTICE:
= 5V
= 5V
A
10%
CC
= 25°C
10%
= 5.0V
10%
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.
20%, unless otherwise noted.
0.2 V
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
50
for all output pins: 71 mA. If I
CC
CC
CC
+ 0.9
CC
CC
0.2 V
0.2 V
OL
V
V
CC
CC
per port pin: 10 mA.
Max
0.45
0.45
-650
300
100
-50
6.5
CC
CC
10
25
40
10
+ 0.5
+ 0.5
- 0.1
- 0.3
OL
exceeds
Units
mA
mA
k
pF
V
V
V
V
V
V
V
V
V
V
V
V
A
A
A
A
A