ATTINY44-20SSU Atmel, ATTINY44-20SSU Datasheet - Page 177

• Manufacturer Part Number: ATTINY44-20SSU
• Description: IC MCU AVR 4K FLASH 20MHZ 14SOIC
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY44-20SSU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: USI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 12
• Program Memory Size: 4KB (2K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 256 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: 14-SOIC (3.9mm Width), 14-SOL
• Cpu Family: ATtiny
• Device Core: AVR
• Device Core Size: 8b
• Frequency (max): 20MHz
• Interface Type: SPI/USI
• Total Internal Ram Size: 256Byte
• # I/os (max): 12
• Number Of Timers - General Purpose: 2
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 2.7V
• On-chip Adc: 8-chx10-bit
• Instruction Set Architecture: RISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 14
• Package Type: SOIC
• For Use With: ATAVRISP2 - PROGRAMMER AVR IN SYSTEM
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

20.4.2
Figure 20-3. External Clock Drive Waveform
Table 20-3.
20.5
8006K–AVR–10/10
Symbol
1/t
t
t
t
t
t
Δ
CLCL
CHCX
CLCX
CLCH
CHCL
t
CLCL
CLCL
System and Reset Characteristics
External Clock Drive
Parameter
Clock Frequency
Clock Period
High Time
Low Time
Rise Time
Fall Time
Change in period from one clock cycle to the next
External Clock Drive Characteristics
V
IL1
V
Table 20-4.
Note:
IH1
Symbol
V
V
t
t
V
RST
HYST
BOD
t
I
RST
BG
BG
BG
1. Values are guidelines only.
Parameter
RESET Pin Threshold Voltage
Minimum pulse width on RESET
Pin
Brown-out Detector Hysteresis
Min Pulse Width on
Brown-out Reset
Internal bandgap reference
voltage
Internal bandgap reference
start-up time
Internal bandgap reference
current consumption
Reset, Brown-out, and Internal Voltage Characteristics
V
Min.
250
100
100
CC
0
= 1.8 - 5.5V
Max.
Condition
V
V
V
V
T
V
T
V
T
2.0
2.0
A
A
A
CC
CC
CC
CC
CC
CC
4
2
= 25°C
= 25°C
= 25°C
= 1.8V
= 3V
= 5V
= 5V
= 5V
= 5V
V
Min.
100
CC
40
40
0
= 2.7 - 5.5V
0.2 V
Min
1.0
Max.
1.6
1.6
10
(1)
2
CC
ATtiny24/44/84
Typ
2000
V
700
400
1.1
50
40
15
Min.
2
CC
50
20
20
0
(1)
= 4.5 - 5.5V
0.9V
Max
Max.
1.2
70
0.5
0.5
20
2
CC
(1)
Units
Units
MHz
mV
µA
ns
µs
µs
ns
ns
ns
µs
µs
%
V
V
177