ATtiny25 Atmel Corporation, ATtiny25 Datasheet - Page 4

• Manufacturer Part Number: ATtiny25
• Manufacturer: Atmel Corporation

Specifications of ATtiny25

• Flash (kbytes): 2 Kbytes
• Pin Count: 8
• Max. Operating Frequency: 20 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 4
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 6
• Ext Interrupts: 6
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 4
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 0.12
• Eeprom (bytes): 128
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 105
• I/o Supply Class: 1.8 to 5.5
• Operating Voltage (vcc): 1.8 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 2
• Output Compare Channels: 5
• Pwm Channels: 6
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

1.3
1.3.1
Table 1-2.
1.4
4
Calibration
Method
Factory
Calibration
User
Calibration
Clock Characteristics
System and Reset Characteristics
ATtiny25
Calibrated Internal RC Oscillator Accuracy
Calibration Accuracy of Internal RC Oscillator
Fixed frequency within:
Target Frequency
It is possible to manually calibrate the internal oscillator to be more accurate than default factory
calibration. Please note that the oscillator frequency depends on temperature and voltage. Volt-
age and temperature characteristics can be found in
page
Notes:
Table 1-3.
Note:
8.0 MHz
Symbol
6 – 8 MHz
V
V
t
t
V
HYST
BOD
t
I
RST
RST
BG
BG
BG
28.
1. Accuracy of oscillator frequency at calibration point (fixed temperature and fixed voltage).
2. ATtiny25/V, only: 6.4 MHz in ATtiny15 Compatibility Mode.
3. Voltage range for ATtiny25V.
4. Voltage range for ATtiny25.
1. Values are guidelines only.
(2)
Parameter
RESET Pin Threshold Voltage
Minimum pulse width on
RESET Pin
Brown-out Detector Hysteresis
Min Pulse Width on
Brown-out Reset
Bandgap reference
voltage
Bandgap reference
start-up time
Bandgap reference
current consumption
Reset, Brown-out and Internal Voltage Characteristics
Fixed voltage within:
1.8V - 5.5V
2.7V - 5.5V
V
3V
CC
(3)
(4)
Condition
V
V
V
T
V
T
V
T
A
A
A
CC
CC
CC
CC
CC
= 25°C
= 25°C
= 25°C
Fixed temperature
-40°C to +105°C
= 3V
= 3V
= 5.5V
= 2.7V
= 2.7V
Temperature
Figure 2-36 on page 28
within:
25°C
0.2 V
Min
1.0
(1)
CC
Typ
Accuracy at given Voltage
1.1
50
40
15
2
(1)
2586N–Appendix A–AVR–08/11
& Temperature
and
0.9 V
Max
±10%
2.5
1.2
±1%
70
Figure 2-37 on
CC
(1)
Units
(1)
mV
µA
µs
µs
µs
V
V