ATmega48 Atmel Corporation, ATmega48 Datasheet - Page 303

• Manufacturer Part Number: ATmega48
• Manufacturer: Atmel Corporation

Specifications of ATmega48

• Flash (kbytes): 4 Kbytes
• Pin Count: 32
• Max. Operating Frequency: 20 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 12
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 23
• Ext Interrupts: 24
• Usb Speed: No
• Usb Interface: No
• Spi: 2
• Twi (i2c): 1
• Uart: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 0.5
• Eeprom (bytes): 256
• Self Program Memory: NO
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8 to 5.5
• Operating Voltage (vcc): 1.8 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 3
• Output Compare Channels: 6
• Input Capture Channels: 1
• Pwm Channels: 6
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

29. Electrical characteristics
29.1
29.2
T
2545T–AVR–05/11
A
Operating temperature................................... -55°C to +125°C
Storage temperature...................................... -65°C to +150°C
Voltage on any pin except RESET
with respect to ground .................................-0.5V to V
Voltage on RESET with respect to ground ......-0.5V to +13.0V
Maximum operating voltage.............................................. 6.0V
DC current per I/O pin.................................................. 40.0mA
DC current
Symbol
V
V
V
V
V
V
V
V
V
V
I
I
R
R
IL
IH
IL
IH
IL1
IH1
IL2
IH2
IL3
IH3
OL
OH
RST
PU
= -40°C to 85°C, V
Absolute maximum ratings*
DC characteristics
V
Parameter
Input low voltage, except
XTAL1 and RESET pin
Input high voltage, except
XTAL1 and RESET pins
Input low voltage,
XTAL1 pin
Input high voltage,
XTAL1 pin
Input low voltage,
RESET pin
Input high voltage,
RESET pin
Input low voltage,
RESET pin as I/O
Input high voltage,
RESET pin as I/O
Output low voltage
RESET pin as I/O
Output high voltage
RESET pin as I/O
Input leakage
current I/O pin
Input leakage
current I/O pin
Reset pull-up resistor
I/O pin pull-up resistor
CC
and GND pins .................................. 200.0mA
CC
= 1.8V to 5.5V (unless otherwise noted).
(3)
(4)
,
,
Condition
V
V
V
V
V
V
V
V
V
V
V
V
V
I
I
I
I
V
(absolute value)
V
(absolute value)
OL
OL
OH
OH
CC
CC
CC
CC
CC
CC
CC
CC
CC
CC
CC
CC
CC
CC
CC
= 20mA, V
= 6mA, V
= -20mA, V
= -10mA, V
= 1.8V - 2.4V
= 2.4V - 5.5V
= 1.8V - 2.4V
= 2.4V - 5.5V
= 1.8V - 5.5V
= 1.8V - 2.4V
= 2.4V - 5.5V
= 1.8V - 5.5V
= 1.8V - 5.5V
= 1.8V - 2.4V
= 2.4V - 5.5V
= 1.8V - 2.4V
= 2.4V - 5.5V
= 5.5V, pin low
= 5.5V, pin high
CC
CC
CC
CC
CC
+0.5V
= 3V
= 5V
= 5V
= 3V
*NOTICE:
Minimum
0.7V
0.6V
0.8V
0.7V
0.9V
0.7V
0.6V
-0.5
-0.5
-0.5
-0.5
-0.5
-0.5
4.2
2.3
30
20
CC
CC
CC
CC
CC
CC
CC
(2)
(2)
(2)
(2)
(2)
(2)
(2)
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
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.
Typical
ATmega48/88/168
Maximum
V
V
V
V
V
V
V
0.2V
0.3V
0.1V
0.2V
0.2V
0.3V
CC
CC
CC
CC
CC
CC
CC
0.7
0.5
60
50
1
1
+ 0.5
+ 0.5
+ 0.5
+ 0.5
+ 0.5
+ 0.5
+ 0.5
CC
CC
CC
CC
CC
CC
(1)
(1)
(1)
(1)
(1)
(1)
Units
kΩ
µA
V
303