Features
High Performance, Low Power AVR
®
8-Bit Microcontroller
Advanced RISC Architecture
123 Powerful Instructions – Most Single Clock Cycle Execution
32 x 8 General Purpose Working Registers
Fully Static Operation
Non-volatile Program and Data Memories
2/4/8K Byte of In-System Programmable Program Memory Flash
Endurance: 10,000 Write/Erase Cycles
128/256/512 Bytes In-System Programmable EEPROM
Endurance: 100,000 Write/Erase Cycles
128/256/512 Bytes Internal SRAM
Data retention: 20 years at 85°C / 100 years at 25C
Programming Lock for Self-Programming Flash Program & EEPROM Data Security
Peripheral Features
8/16-bit Timer/Counter with Prescaler
8/10-bit High Speed Timer/Counter with Separate Prescaler
3 High Frequency PWM Outputs with Separate Output Compare Registers
Programmable Dead Time Generator
10-bit ADC
11 Single-Ended Channels
16 Differential ADC Channel Pairs
15 Differential ADC Channel Pairs with Programmable Gain (1x, 8x, 20x, 32x)
On-chip Analog Comparator
Programmable Watchdog Timer with Separate On-chip Oscillator
Universal Serial Interface with Start Condition Detector
Special Microcontroller Features
debugWIRE On-chip Debug System
In-System Programmable via SPI Port
External and Internal Interrupt Sources
Low Power Idle, ADC Noise Reduction, Standby and Power-Down Modes
Enhanced Power-on Reset Circuit
Programmable Brown-out Detection Circuit
Internal Calibrated Oscillator
On-chip Temperature Sensor
I/O and Packages
16 Programmable I/O Lines
Available in 20-pin PDIP, 20-pin SOIC and 32-pad MLF
Operating Voltage:
1.8 – 5.5V for ATtiny261V/461V/861V
2.7 – 5.5V for ATtiny261/461/861
Speed Grade:
ATtiny261V/461V/861V: 0 – 4 MHz @ 1.8 – 5.5V, 0 – 10 MHz @ 2.7 – 5.5V
ATtiny261/461/861: 0 – 10 MHz @ 2.7 – 5.5V, 0 – 20 MHz @ 4.5 – 5.5V
Industrial Temperature Range
Low Power Consumption
Active Mode (1 MHz System Clock): 300 µA @ 1.8V
Power-Down Mode: 0.1 µA at 1.8V
8-bit
Microcontroller
with 2/4/8K
Bytes In-System
Programmable
Flash
ATtiny261/V*
ATtiny461/V
ATtiny861/V
Summary
*Mature
2588FS–AVR–06/2013
2
2588FS–AVR–06/2013
ATtiny261/461/861
1. Pin Configurations
Figure 1-1. Pinout ATtiny261/461/861 and ATtiny261V/461V/861V
Note: To ensure mechanical stability the center pad underneath the QFN/MLF package should be soldered to ground on the board.
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
(MOSI/DI/SDA/OC1A/PCINT8) PB0
(MISO/DO/OC1A/PCINT9) PB1
(SCK/USCK/SCL/OC1B/PCINT10) PB2
(OC1B/PCINT11) PB3
VCC
GND
(ADC7/OC1D/CLKI/XTAL1/PCINT12) PB4
(ADC8/OC1D/CLKO/XTAL2/PCINT13) PB5
(ADC9/INT0/T0/PCINT14) PB6
(ADC10/RESET/PCINT15) PB7
PA0 (ADC0/DI/SDA/PCINT0)
PA1 (ADC1/DO/PCINT1)
PA2 (ADC2/INT1/USCK/SCL/PCINT2)
PA3 (AREF/PCINT3)
AGND
AVCC
PA4 (ADC3/ICP0/PCINT4)
PA5 (ADC4/AIN2/PCINT5)
PA6 (ADC5/AIN0/PCINT6)
PA7 (ADC6/AIN1/PCINT7)
PDIP/SOIC
1
2
3
4
5
6
7
8
24
23
22
21
20
19
18
17
32
31
30
29
28
27
26
25
9
10
11
12
13
14
15
16
NC
(OC1B/PCINT11) PB3
NC
VCC
GND
NC
(ADC7/OC1D/CLKI/XTAL1/PCINT12) PB4
(ADC8/OC1D/CLKO/XTAL2/PCINT13) PB5
NC
PA2 (ADC2/INT1/USCK/SCL/PCINT2)
PA3 (AREF/PCINT3)
AGND
NC
NC
AVCC
PA4 (ADC3/ICP0/PCINT4)
NC
(ADC9/INT0/T0/PCINT14) PB6
(ADC10/RESET/PCINT15) PB7
NC
(ADC6/AIN1/PCINT7) PA7
(ADC5/AIN0/PCINT6) PA6
(ADC4/AIN2/PCINT5) PA5
NC
PB2 (SCK/USCK/SCL/OC1B/PCINT10)
PB1 (MISO/DO/OC1A/PCINT9)
PB0 (MOSI/DI/SDA/OC1A/PCINT8)
NC
NC
NC
PA0 (ADC0/DI/SDA/PCINT0)
PA1 (ADC1/DO/PCINT1)
QFN/MLF
3
2588FS–AVR–06/2013
ATtiny261/461/861
1.1 Pin Descriptions
1.1.1 VCC
Supply voltage.
1.1.2 GND
Ground.
1.1.3 AVCC
Analog supply voltage. This is the supply voltage pin for the Analog-to-digital Converter (ADC),
the analog comparator, the Brown-Out Detector (BOD), the internal voltage reference and Port
A. It should be externally connected to VCC, even if some peripherals such as the ADC are not
used. If the ADC is used AVCC should be connected to VCC through a low-pass filter.
1.1.4 AGND
Analog ground.
1.1.5 Port A (PA7:PA0)
An 8-bit, bi-directional I/O port with internal pull-up resistors, individually selectable for each bit.
Output buffers have symmetrical drive characteristics with both high sink and source capability.
As inputs, port pins that are externally pulled low will source current if pull-up resistors have
been activated. Port pins are tri-stated when a reset condition becomes active, even if the clock
is not running.
Port A also serves the functions of various special features of the device, as listed on page 63.
1.1.6 Port B (PB7:PB0)
An 8-bit, bi-directional I/O port with internal pull-up resistors, individually selectable for each bit.
Output buffers have symmetrical drive characteristics with both high sink and source capability.
As inputs, port pins that are externally pulled low will source current if pull-up resistors have
been activated. Port pins are tri-stated when a reset condition becomes active, even if the clock
is not running.
Port B also serves the functions of various special features of the device, as listed on page 66.
1.1.7 RESET
Reset input. A low level on this pin for longer than the minimum pulse length will generate a
reset, even if the clock is not running and provided the reset pin has not been disabled. The min-
imum pulse length is given in Table 19-4 on page 190. Shorter pulses are not guaranteed to
generate a reset.
The reset pin can also be used as a (weak) I/O pin.

ATTINY461-20MU

Mfr. #:
Manufacturer:
Microchip Technology / Atmel
Description:
8-bit Microcontrollers - MCU AVR 4K FLSH 256B EE 256B SRAM ADC 5V
Lifecycle:
New from this manufacturer.
Delivery:
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