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...
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 used in many classic Arduino-style boards. If a USB host library mentions AVR support, it suggests the examples or compatibility may be aimed at those older microcontroller boards.
- 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 chip that runs your program and controls connected inputs and outputs. For this product, it is the part that reads buttons and sensors, drives the display and speaker, and communicates over Bluetooth.
- 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 is temporary memory used while a device is running, and its contents are lost when power is removed. A “Run in RAM” mode is useful for testing settings without permanently programming the module, but it may not support every feature.
Find this product in
ATtiny84A Datasheet
Datasheet · 690.7 KB · Click any page to view full size
Supplier page — sparkfun.com
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