ATMEGA644A-PU Atmel, ATMEGA644A-PU Datasheet - Page 568

• Manufacturer Part Number: ATMEGA644A-PU
• Description: IC MCU AVR 64K FLASH 40PDIP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA644A-PU

• 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: 32
• Program Memory Size: 64KB (32K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 2K x 8
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 40-DIP (0.600", 15.24mm)
• Processor Series: ATmega
• Core: AVR
• Data Bus Width: 8 bit
• Data Ram Size: 4 KB
• Interface Type: JTAG, TWI, SPI, USART
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 3
• Operating Supply Voltage: 3.3 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• Minimum Operating Temperature: - 40 C
• Operating Temperature Range: - 40 C to + 85 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

32.3
8272A–AVR–01/10
44M1
K
Package Drawing Contact:
[e-mail]
L
E2
Note: JEDEC Standard MO-220, Fig. 1 (SAW Singulation) VKKD-3.
Marked Pin# 1 ID
K
BOTTOM VIEW
164A/164PA/324A/324PA/644A/644PA/1284/1284P
b
TOP VIEW
D2
D
e
44M1, 44-pad, 7 x 7 x 1.0 mm Body, Lead
Pitch 0.50 mm, 5.20 mm Exposed Pad, Thermally
Enhanced Plastic Very Thin Quad Flat No
Lead Package (VQFN)
TITLE
1
2
3
E
Pin #1 Corner
Option B
Option C
Option A
Pin #1
Triangle
Pin #1
Chamfer
(C 0.30)
Pin #1
Notch
(0.20 R)
A
SIDE VIEW
SYMBOL
A
A1
A3
b
D
D2
E
E2
e
L
K
SEATING PLANE
A1
A3
0.80
0.18
6.90
5.00
6.90
5.00
0.59
0.20
COMMON DIMENSIONS
MIN
(Unit of Measure = mm)
–
GPC
ZWS
0.20 REF
0.50 BSC
NOM
0.90
0.02
0.23
7.00
5.20
7.00
5.20
0.64
0.26
DRAWING NO.
MAX
1.00
0.05
0.30
7.10
5.40
7.10
5.40
0.69
0.41
44M1
NOTE
9/26/08
REV.
H
568