SparkFun
ATtiny84A AVR 8-bit Microcontroller IC
· MPN: COM-19582
The ATtiny84A is a low-power CMOS 8-bit microcontroller based on the AVR enhanced RISC architecture. It is suited to compact embedded projects where you need...
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The ATtiny84A is a low-power CMOS 8-bit microcontroller based on the AVR enhanced RISC architecture. It is suited to compact embedded projects where you need a small AVR controller with flexible I/O and low-voltage operation.
By executing powerful instructions in a single clock cycle, the ATtiny84A can achieve throughputs approaching 1 MIPS per MHz, helping designers balance power consumption against processing speed.
This surface-mount IC includes 12 I/O lines, FLASH program memory, EEPROM, RAM, an internal oscillator, ADC channels and common embedded peripherals such as PWM, watchdog timer and brown-out detection/reset.
Specifications:
- Core Processor: AVR
- Core Size: 8-Bit
- Speed: 20MHz
- Connectivity: USI
- Peripherals: Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
- Number of I/O: 12
- Program Memory Size: 8KB (4K x 16)
- Program Memory Type: FLASH
- EEPROM Size: 512 x 8
- RAM Size: 512 x 8
- Voltage - Supply (Vcc/Vdd): 1.8V ~ 5.5V
- Data Converters: A/D 8x10b
- Oscillator Type: Internal
- Operating Temperature: -40°C ~ 85°C (TA)
- Mounting Type: Surface Mount
A handy choice for small AVR-based controllers, low-power gadgets, sensor nodes and custom embedded hardware.
Jargon buster
Plain-language definitions for the technical terms used above.
- ADC
- An analogue-to-digital converter reads a changing voltage and turns it into a number the microcontroller can use. It matters when connecting analogue sensors such as light, sound, or variable-resistor sensors.
- AVR
- AVR is a family of 8-bit microcontrollers (made by Microchip, formerly Atmel) used in many classic Arduino-style boards such as the Uno and Nano. They are widely supported but older, which can be a limit for memory- or speed-intensive tasks.
- EEPROM
- A type of non-volatile memory that keeps stored data even when power is turned off. In a sensor module, it can be used to store settings or calibration data so they do not need to be re-entered every time.
- microcontroller
- A microcontroller is a small computer on a single chip that runs a stored program and controls connected inputs and outputs such as buttons, sensors, displays and communication interfaces. In a device built around one, it is the part that executes the code and coordinates the device's behaviour.
- PWM
- Pulse Width Modulation is a way for a digital pin to simulate variable output power by switching on and off very quickly. It matters for controlling things like LED brightness, motor speed, or servo-style signals from a microcontroller pin.
- RAM
- RAM (random-access memory) is fast, temporary memory a device uses for working data while it is running; in its common volatile form, its contents are lost when power is removed. Some devices offer a mode that applies settings to RAM only, which is handy for testing changes temporarily because they are not stored permanently and disappear at power-off.
- VCC
- VCC is the positive power-supply connection on a chip or module. Connecting it to the correct supply voltage is needed for the part to power on and helps avoid damaging the electronics.
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ATtiny84A Datasheet
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Supplier page — sparkfun.com
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