ATtiny43U datasheet(156/182 Pages) ATMEL

156 / 182 page

156

8048B–AVR–03/09

ATtiny43U

Notes:

1. “Max” means the highest value where the pin is guaranteed to be read as low.

2. Not tested in production.

3. “Min” means the lowest value where the pin is guaranteed to be read as high.

4. Although each I/O port can under steady state (non-transient) conditions sink more than indicated, the sum of all IOL currents

may not exceed 60 mA, or the boost converter limits. If I

OL limits are exceeded the corresponding VOL levels can not be guar-

anteed. Pins are not guaranteed to sink currents greater than those listed.

5. Pins PB1, PB2, PB4 and PB5 are high sink I/O pins.

6. Although each I/O port can under steady state (non-transient) conditions source more than indicated, the sum of all I

OH cur-

rents may not exceed 60 mA, or the boost converter limits. If IOH limits are exceeded the corresponding VOH levels can not be

guaranteed. Pins are not guaranteed to source currents greater than those listed.

7. See “Boost Converter Characteristics” on page 159 for current consumption of entire device, including boost converter.

20.3

Speed Grades

Figure 20-1. Maximum Frequency vs. V

CC (Boost Converter Disregarded).

RPU

Pull-up Resistor, I/O Pin

CC = 5.5V, input low

Pull-up Resistor, RESET Pin

CC = 5.5V, input low

ICC

Supply Current,

Active Mode,

Without Boost Converter

(7)

f = 1MHz, VCC = 2V

0.2

0.55

f = 4MHz, VCC = 3V

1.3

2.5

f = 8MHz, VCC = 5V

Supply Current,

Idle Mode,

Without Boost Converter

(7)

f = 1MHz, VCC = 2V

0.04

0.15

f = 4MHz, VCC = 3V

0.25

0.6

f = 8MHz, VCC = 5V

1.0

2.0

Supply Current,

Power-Down Mode,

Without Boost Converter

(7)

WDT enabled, VCC = 3V

4.5

µA

WDT disabled, VCC = 3V

0.35

µA

Table 20-1.

DC Characteristics. T

A = -40°C to 85°C (Continued)

Symbol

Parameter

Condition

Min.

Typ.

Max.

Units

8 MHz

4 MHz

1.8V

2.7V

5.5V

Safe Operating Area

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