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ATTINY84A-MU

Microchip TechnologyExtended

-40℃~+85℃ 1.8V~5.5V 10bit 12 20MHz 512Byte 512Byte 8 Bit 8KB AVR Built-in FLASH VQFN-20-EP(4x4) Microcontrollers (MCU/MPU/SOC) ROHS

DatasheetJLCPCBLCSC
Part id
microchip/ATTINY84A-MU
Category
Microcontrollers (MCU, MPU, SOC)
Package
QFN-20-EP(4x4)
Pins
21
In stock
74 at JLCPCB (C1522082)
Used on
6 open-source boards

Overview

The ATTINY84A-MU is a microcontroller made by Microchip Technology in a QFN-20-EP(4x4) package with 21 pins. -40℃~+85℃ 1.8V~5.5V 10bit 12 20MHz 512Byte 512Byte 8 Bit 8KB AVR Built-in FLASH VQFN-20-EP(4x4) Microcontrollers (MCU/MPU/SOC) ROHS.

PCBKit's library has its KiCad symbol (MCU_Microchip_ATtiny:ATtiny84A-M, from KiCad's library) and its footprint (Package_DFN_QFN:QFN-20-1EP_4x4mm_P0.5mm_EP2.6x2.6mm, from KiCad's library), ready for a KiCad board. 74 are in stock at JLCPCB (part C1522082). 6 open-source boards in 4 repositories on GitHub use it.

Symbol

1PA42PA33PA24PA15AREF/PA08GND9VCC11XTAL1/PB012XTAL2/PB113RESET/PB314PB215PA716PA620PA5
MCU_Microchip_ATtiny:ATtiny84A-MFrom KiCad's library

Footprint

21
Package_DFN_QFN:QFN-20-1EP_4x4mm_P0.5mm_EP2.6x2.6mmFrom KiCad's library

From the datasheet

4
Supply, least
1.8 V · VCC, recommended operating, min · p. 1
Supply, most
5.5 V · VCC, recommended operating, max · p. 1
Works from
-40 °C · industrial operating ambient, min · p. 1
Works up to
85 °C · industrial operating ambient, max · p. 1

Pinout

21
The pins of the ATTINY84A-MU
PinNameType
1PA4Input/output
2PA3Input/output
3PA2Input/output
4PA1Input/output
5AREF/PA0Input/output
6NCNot connected
7NCNot connected
8GNDPower in
9VCCPower in
10NCNot connected
11XTAL1/PB0Input/output
12XTAL2/PB1Input/output
13RESET/PB3Input/output
14PB2Input/output
15PA7Input/output
16PA6Input/output
17NCNot connected
18NCNot connected
19NCNot connected
20PA5Input/output
21GNDPassive

Open-source boards using it

6
  • 4 layers17.8 × 19 mmRing motion rgb, the printed circuit board in 3D

    Ring motion rgb

    whatnick/lantern_ring

    Lantern Corps Style Ring, SW/HW/Jewellery Design

    22 parts3
  • 2 layers9.5 × 6 mmAttiny x4-x5 adapter, the printed circuit board in 3D

    Attiny x4-x5 adapter

    CRImier/MyKiCad

    My KiCad boards. Can't be bothered uploading individually anymore, so here you go.

    3 parts253GPL-3.0
  • 2 layers16 × 16 mmBase, the printed circuit board in 3D

    Base

    aspro648/KiCad

    My design files. Abandon all hope ye who enter here.

    16 parts33
  • 2 layers27 × 27 mmBase, the printed circuit board in 3D

    Base

    aspro648/KiCad

    My design files. Abandon all hope ye who enter here.

    11 parts33
  • 2 layers16 × 16 mmStencil, the printed circuit board in 3D

    Stencil

    aspro648/KiCad

    My design files. Abandon all hope ye who enter here.

    7 parts33

Parts like it

8

Questions

Is there a KiCad symbol and footprint for the ATTINY84A-MU?

Yes. The symbol is MCU_Microchip_ATtiny:ATtiny84A-M and the footprint Package_DFN_QFN:QFN-20-1EP_4x4mm_P0.5mm_EP2.6x2.6mm, both drawn on this page. PCBKit places them on a board for you when you design with it.

What package is the ATTINY84A-MU?

QFN-20-EP(4x4), with 21 pins. Its footprint is drawn on this page.

Where is the ATTINY84A-MU datasheet?

Microchip Technology publishes it: the Datasheet link on this page opens it.

Where can I order the ATTINY84A-MU?

JLCPCB lists it as part C1522082, with 74 in stock; the sellers' links on this page open their listings.

What can replace the ATTINY84A-MU?

Parts like it in the library: the ATTINY44A-MU by Microchip Technology, the ATTINY24A-MF by Microchip Technology, the ATTINY25-20MU by Microchip Technology and the ATTINY84-20MU by Microchip Technology. Check their datasheets: a part that fits the footprint may still differ in its ratings.

Which open-source boards use the ATTINY84A-MU?

6 boards in 4 repositories on GitHub; the most starred are listed on this page, with their KiCad files.