Datasheet
196
8246A–AVR–11/09
ATtiny2313A/4313
Notes: 1. “Min” means the lowest value where the pin is guaranteed to be read as high.
2. “Max” means the highest value where the pin is guaranteed to be read as low.
3. Although each I/O port can sink more than the test conditions (20 mA at V
CC
= 5V, 10 mA at V
CC
= 3V) under steady state
conditions (non-transient), the following must be observed:
1] The sum of all IOL, for all ports, should not exceed 60 mA.
If IOL exceeds the test condition, VOL may exceed the related specification. Pins are not guaranteed to sink current greater
than the listed test condition.
4. Although each I/O port can source more than the test conditions (20 mA at V
CC
= 5V, 10 mA at V
CC
= 3V) under steady state
conditions (non-transient), the following must be observed:
1] The sum of all IOH, for all ports, should not exceed 60 mA.
If IOH exceeds the test condition, VOH may exceed the related specification. Pins are not guaranteed to source current
greater than the listed test condition.
5. 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 22-29 and Figure 22-30.
6. These are test limits, which account for leakage currents of the test environment. Actual device leakage currents are lower.
7. Values using methods described in “Minimizing Power Consumption” on page 35. Power Reduction is enabled (PRR =
0xFF), the external clock is selected (CKSEL = 0000), and there is no I/O drive.
8. BOD Disabled.
21.3 Speed Grades
The maximum operating frequency of the device depends on V
CC.
As shown in Figure 21-1, the
relationship between maximum frequency and V
CC
is linear in the region 1.8V < V
CC
< 4.5V.
Figure 21-1. Maximum Frequency vs. V
CC
I
CC
Power Supply Current
Active 1MHz, V
CC
= 2V
(7)
0.2 0.55 mA
Active 4MHz, V
CC
= 3V
(7)
1.3 2.5 mA
Active 8MHz, V
CC
= 5V
(7)
3.9 7 mA
Idle 1MHz, V
CC
= 2V
(7)
0.03 0.15 mA
Idle 4MHz, V
CC
= 3V
(7)
0.25 0.6 mA
Idle 8MHz, V
CC
= 5V
(7)
12mA
Power-down mode
WDT enabled, V
CC
= 3V
(8)
410µA
WDT disabled, V
CC
= 3V
(8)
< 0.15 2 µA
T
A
= -40°C to 85°C, V
CC
= 1.8V to 5.5V (unless otherwise noted) (Continued)
Symbol Parameter Condition Min. Typ. Max. Units
4 MHz
1.8V 5.5V
4.5V
20 MHz