ATTINY40 Datasheet, PDF (166/216 Pages) ATMEL Corporation – 8-bit AVR Microcontroller with 4K Bytes In-System Programmable Flash

Table 21-1. DC Characteristics. T_A = -40°C to +85°C (Continued)
Symbol Parameter
Condition
Min
Typ⁽¹⁾
Max
Units
I_CC
Notes:
Active 1MHz, V_CC = 2V
0.4
0.6
mA
Active 4MHz, V_CC = 3V
1.1
2
mA
Power Supply Current^{(7) Active 8MHz, VCC = 5V}
Idle 1MHz, V_CC = 2V
3.2
5
mA
0.03
0.2
mA
Idle 4MHz, V_CC = 3V
0.2
0.5
mA
Idle 8MHz, V_CC = 5V
0.8
1.5
mA
Power-down mode⁽⁸⁾
1. Typical values at 25°C.
WDT enabled, V_CC = 3V
WDT disabled, V_CC = 3V
4.5
10
µA
0.15
2
µA
2. “Min” means the lowest value where the pin is guaranteed to be read as high.
3. “Max” means the highest value where the pin is guaranteed to be read as low.
4. Although each I/O port can sink more than the test conditions (10 mA at V_CC = 5V, 5 mA at V_CC = 3V) under steady state
conditions (non-transient), the sum of all I_OL (for all ports) should not exceed 60 mA. If I_OL exceeds the test conditions, V_OL
may exceed the related specification. Pins are not guaranteed to sink current greater than the listed test condition.
5. Although each I/O port can source more than the test conditions (10 mA at V_CC = 5V, 5 mA at V_CC = 3V) under steady state
conditions (non-transient), the sum of all I_OH (for all ports) should not exceed 60 mA. If I_OH exceeds the test condition, V_OH
may exceed the related specification. Pins are not guaranteed to source current greater than the listed test condition.
6. The RESET pin must tolerate high voltages when entering and operating in programming modes and, as a consequence,
has a weak drive strength as compared to regular I/O pins. See Figure 22-32 to Figure 22-37, starting from page 188.
7. Values are with external clock using methods described in “Minimizing Power Consumption” on page 29. Power Reduction
is enabled (PRR = 0xFF) and there is no I/O drive.
8. BOD Disabled.
21.3 Speed
The maximum operating frequency of the device depends on V_CC . As shown in Figure 21-1, the
relationship between maximum frequency vs. V_CC is linear between 1.8V - 2.7V and 2.7V - 4.5V.
Figure 21-1. Maximum Frequency vs. V_CC
12 MHz
8 MHz
4 MHz
1.8V
2.7V
4.5V
5.5V
166 ATtiny40
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