Datasheet
174
8183F–AVR–06/12
ATtiny24A/44A/84A
Notes: 1. Typical values at 25°C.
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. Not tested in production.
5. 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.
6. 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.
7. 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 21-87, Figure 21-88, Figure 21-89, and Figure 21-90
(starting on page 226).
8. These are test limits, which account for leakage currents of the test environment. Actual device leakage currents are lower.
9. Values are with external clock using methods described in “Minimizing Power Consumption” on page 35. Power Reduction
is enabled (PRR = 0xFF) and there is no I/O drive.
10. BOD Disabled.
20.3 Speed
The maximum operating frequency of the device depends on V
CC.
As shown in Figure 20-1, the
relationship between maximum frequency and V
CC
is linear in the region 1.8V < V
CC
< 4.5V.
Figure 20-1. Maximum Frequency vs. V
CC
I
CC
Supply Current,
Active Mode
(9)
f = 1 MHz, V
CC
= 2V 0.25 0.5 mA
f = 4 MHz, V
CC
= 3V 1.2 2 mA
f = 8 MHz, V
CC
= 5V 4.4 7 mA
Supply Current,
Idle Mode
(9)
f = 1 MHz, V
CC
= 2V 0.04 0.2 mA
f = 4 MHz, V
CC
= 3V 0.25 0.6 mA
f = 8 MHz, V
CC
= 5V 1.3 2 mA
Supply Current,
Power-Down Mode
(10)
WDT enabled, V
CC
= 3V 4 10 µA
WDT disabled, V
CC
= 3V 0.13 2 µA
Table 20-1. DC Characteristics. T
A
= -40°C to +85°C (Continued)
Symbol Parameter Condition Min Typ
(1)
Max Units
4 MHz
1.8V 5.5V
4.5V
20 MHz