ATtiny5 datasheet(117/168 Pages) ATMEL

117 / 168 page

117

8127C–AVR–10/09

ATtiny4/5/9/10

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 (10 mA at VCC = 5V, 5 mA at VCC = 3V) under steady state

conditions (non-transient), the sum of all IOL (for all ports) should not exceed 60 mA. If IOL exceeds the test conditions, 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 (10 mA at VCC = 5V, 5 mA at VCC = 3V) under steady state

conditions (non-transient), 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 17-25 on page 135, and Figure 17-26 on page 135.

6. Values are with external clock using methods described in “Minimizing Power Consumption” on page 24. Power Reduction

is enabled (PRR = 0xFF) and there is no I/O drive.

7. BOD Disabled.

16.3 Speed Grades

The maximum operating frequency of the device depends on VCC . As shown in Figure 16-1, the

relationship between maximum frequency vs. VCC is linear between 1.8V < VCC < 4.5V.

Figure 16-1. Maximum Frequency vs. VCC

ICC

Power Supply Current(6)

Active 1MHz, VCC = 2V

0.2

0.5

Active 4MHz, VCC = 3V

0.8

1.5

Active 8MHz, VCC = 5V

2.7

Idle 1MHz, VCC = 2V

0.02

0.2

Idle 4MHz, VCC = 3V

0.13

0.5

Idle 8MHz, VCC = 5V

0.6

1.5

Power-down mode(7)

WDT enabled, VCC = 3V

4.5

µA

WDT disabled, VCC = 3V

0.15

µA

Table 16-1.

DC Characteristics. TA = -40°C to +85°C (Continued)

Symbol

Parameter

Condition

Min.

Typ.

Max.

Units

4 MHz

8 MHz

1.8V

5.5V

4.5V

2.7V

12 MHz

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