ATMEGA168-20PU Atmel, ATMEGA168-20PU Datasheet - Page 302

• Manufacturer Part Number: ATMEGA168-20PU
• Description: IC AVR MCU 16K 20MHZ 28DIP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA168-20PU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 23
• Program Memory Size: 16KB (8K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 6x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-DIP (0.300", 7.62mm)
• Processor Series: ATMEGA16x
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 1 KB
• Interface Type: 2-Wire, SPI, USART, Serial
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 23
• Number Of Timers: 3
• Operating Supply Voltage: 2.7 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 6 Channel
• A/d Inputs: 6-Channel, 10-Bit
• Cpu Speed: 20 MIPS
• Eeprom Memory: 512 Bytes
• Input Output: 23
• Interface: I2C/SPI/UART/USART
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 28-pin PDIP
• Programmable Memory: 16K Bytes
• Timers: 2-8-bit, 1-16-bit
• Voltage, Range: 4.5-5.5 V
• Controller Family/series: AVR MEGA
• No. Of I/o's: 23
• Eeprom Memory Size: 512Byte
• Ram Memory Size: 1KB
• Rohs Compliant: Yes
• For Use With: ATSTK600-TQFP32 - STK600 SOCKET/ADAPTER 32-TQFPATSTK600 - DEV KIT FOR AVR/AVR32770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAGATAVRDRAGON - KIT DRAGON 32KB FLASH MEM AVRATAVRISP2 - PROGRAMMER AVR IN SYSTEMATJTAGICE2 - AVR ON-CHIP D-BUG SYSTEM
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

26.6
Table 26-2
Interface meets or exceeds these requirements under the noted conditions.
Timing symbols refer to
Table 26-2.
302
Symbol
VIL
VIH
Vhys
VOL
tr
tof
tSP
I
i
(1)
(1)
(1)
(1)
(1)
2-wire Serial Interface Characteristics
ATmega48/88/168
describes the requirements for devices connected to the 2-wire Serial Bus. The ATmega48/88/168 2-wire Serial
Parameter
Input Low-voltage
Input High-voltage
Hysteresis of Schmitt Trigger Inputs
Output Low-voltage
Rise Time for both SDA and SCL
Output Fall Time from V
Spikes Suppressed by Input Filter
Input Current each I/O Pin
2-wire Serial Bus Requirements
Figure
Figure 26-2. Maximum Frequency vs. V
Figure 26-3. Maximum Frequency vs. V
26-4.
IHmin
to V
10 MHz
20 MHz
10 MHz
ILmax
4 MHz
1.8V
2.7V
10 pF < C
0.1V
3 mA sink current
CC
Condition
Safe Operating Area
< V
b
CC
CC
< 400 pF
i
< 0.9V
Safe Operating Area
, ATmega48V/88V/168V
, ATmega48/88/168
2.7V
CC
4.5V
(3)
20 + 0.1C
20 + 0.1C
0.05 V
0.7 V
-0.5
5.5V
Min
-10
0
0
CC
CC
b
b
(2)
(3)(2)
(3)(2)
5.5V
V
0.3 V
CC
50
Max
300
250
0.4
10
–
+ 0.5
(2)
CC
2545E–AVR–02/05
Units
µA
ns
ns
ns
V
V
V
V