ATMEGA168-20AI Atmel, ATMEGA168-20AI Datasheet - Page 363

• Manufacturer Part Number: ATMEGA168-20AI
• Description: IC AVR MCU 16K 20MHZ 32TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA168-20AI

• 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 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-TQFP, 32-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

35. Datasheet Revision History
35.1
35.2
35.3
35.4
35.5
35.6
2545S–AVR–07/10
Rev. 2545S-07/10
Rev. 2545R-07/09
Rev. 2545Q-06/09
Rev. 2545P-02/09
Rev. 2545O-02/09
Rev. 2545N-01/09
Please note that the referring page numbers in this section are referred to this document. The
referring revision in this section are referring to the document revision.
1.
2.
1.
2.
1.
2.
1.
1.
2.
1.
2.
3.
Changed minimum Power-on Reset Threshold Voltage (falling) to 0.05V in
Note 6 and Note 7 in
have been removed.
Document updated according to Atmel standard.
Updated
Updated the last page with Atmel’s new addresses.
Removed the heading “About”. The subsections of this sectionis now separate sec-
tions, “Resources”, “Data Retention” and “About Code Examples”
Updated
Removed Power-off slope rate from
3 on page
Removed section “Power-on slope rate” from
page
Updated
designs”.
Merged the sections Resources, Data Retention and About Code Examples under
one common section,
Updated
306.
“Errata” on page
“Ordering Information” on page
Figure 8-4 on page
“Features” on page 1
306.
“Resources” on page
Table 28-5, “2-wire Serial Bus Requirements,” on page 307
356.
34.
and added the note “Not recommended for new
Table 28-3 on page
349.
7.
“System and Reset Characteristics” on
ATmega48/88/168
306.
Table 28-
363