ATtiny261/461/861

23. Electrical Characteristics

23.1Absolute Maximum Ratings*

..................................Operating Temperature					-55°C to +125°C	*NOTICE: Stresses beyond those listed under “Absolute
						Maximum Ratings” may cause permanent dam-
Storage Temperature .....................................					-65°C to +150°C	age to the device. This is a stress rating only and
						functional operation of the device at these or
Voltage on any Pin except			RESET			other conditions beyond those indicated in the
with respect to Ground ................................					- 0.5V to VCC+0.5V	operational sections of this specification is not
Voltage on		with respect to Ground			-0.5V to +13.0V	implied. Exposure to absolute maximum rating
	RESET					conditions for extended periods may affect
Maximum Operating Voltage					6.0V	device reliability.
DC Current per I/O Pin ...............................................					40.0 mA
DC Current VCC and GND Pins................................					200.0 mA

23.2DC Characteristics

TA = -40°C to 85°C, VCC = 1.8V to 5.5V (unless otherwise noted)(1)

Symbol

Parameter

Condition

Min.

Typ.

Max.

Units

Except XTAL1 and

VIL

Input Low-voltage

RESET

-0.5

0.2VCC

V

pin

Except XTAL1 and

VIH

Input High-voltage

RESET

0.7VCC

(3)

VCC

+0.5

V

pin

VIL1

Input Low-voltage

XTAL1 pin, External

-0.5

0.1VCC

V

Clock Selected

VIH1

Input High-voltage

XTAL1 pin, External

0.8VCC

(3)

VCC

+0.5

V

Clock Selected

VIL2

Input Low-voltage

pin

-0.5

0.2VCC

V

RESET

VIH2

(3)

Input High-voltage

RESET pin

0.9VCC

VCC

+0.5

V

VIL3

Input Low-voltage

pin as I/O

-0.5

0.2VCC

V

RESET

(3)

VIH3

Input High-voltage

RESET pin as I/O

0.7VCC

VCC

+0.5

V

Output Low Voltage(4)

I

OL

= 10 mA, V

= 5V

0.6

V

VOL

CC

(Except Reset pin)

IOL = 5 mA, VCC = 3V

0.5

V

VOH

Output High-voltage(5)

I

OH

= -10 mA, V

CC

= 5V

4.3

V

(Except Reset pin)

IOH = -5 mA, VCC = 3V

2.5

V

IIL

Input Leakage

Vcc = 5.5V, pin low

<0.05

1

µA

Current I/O Pin

(absolute value)

IIH

Input Leakage

Vcc = 5.5V, pin high

<0.05

1

µA

Current I/O Pin

(absolute value)

RRST

Reset Pull-up Resistor

30

60

kΩ

RPU

I/O Pin Pull-up Resistor

20

50

kΩ

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T = -40°C to 85°C, V

CC

= 1.8V to 5.5V (unless otherwise noted)(1)

(Continued)

A

Symbol

Parameter

Condition

Min.

Typ.

Max.

Units

Active 1MHz, V

CC

= 2V(6)

0.4

0.6

mA

Active 4MHz, V

CC

= 3V(6)

2

3

mA

Power Supply Current

Active 8MHz, V

CC

= 5V(6)

6

9

mA

Idle 1MHz, V

= 2V(6)

0.1

0.3

mA

ICC

CC

Idle 4MHz, V

= 3V(6)

0.4

1

mA

CC

Idle 8MHz, V

= 5V(6)

1.5

3

mA

CC

Power-down mode

WDT enabled, V

CC

= 3V(7)

4

10

µA

WDT disabled, V

= 3V(7)

0.15

2

µA

CC

Notes: 1. Typical values at 25 °C. Maximum values are characterized values and not test limits in production.

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

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

4.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 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.

5.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 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.

6.Values using methods described in ”Minimizing Power Consumption” on page 35. Power Reduction is enabled (PRR = 0xFF) and there is no I/O drive.

7.BOD Disabled.

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ATtiny261/461/861

23.3Speed Grades

Figure 23-1. Maximum Frequency vs. VCC
10 MHz
	Safe Operating Area
4 MHz
1.8V	2.7V	5.5V

Figure 23-2. Maximum Frequency vs. VCC

20 MHz

10 MHz

Safe Operating Area

2.7V

4.5V

5.5V

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