# ATTINY45-20MU (Component)
## Description
MICROCHIP
ATTINY45-20MU
QFN-20_L4.0-W4.0-P0.5-BL-EP
LCSC Part Number: C145594
JLCPCB Part Class: Extended Part
Manufactured by MICROCHIP(美国微芯)
## Component Details
- **Owner:** lcsc
- **Created:** 10/30/2024
- **Last Updated:** 4/23/2025
- **Visibility:** Public
- **Manufacturer Part Number:** ATTINY45-20MU
- **Package or Case Code:** QFN-20_L4.0-W4.0-P0.5-BL-EP
- **Part Type:** MICROCHIP
- **LCSC Part Number:** C145594
- **JLCPCB Part Class:** Extended Part
- **Manufacturer Name:** MICROCHIP(美国微芯)
- **Product Info Url:** https://lcsc.com/product-detail/MICROCHIP_MICROCHIP_ATTINY45-20MU_ATTINY45-20MU_C145594.html
- **Datasheet URL:** https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_Microchip-Tech-ATTINY45-20MU_C145594.pdf
## Distributor Pricing (qty 1)
*Pricing shown for quantity 1. For price breaks and other quantities, open in Flux.*
| Distributor | Unit Price (qty 1) | Stock |
|------------|--------------------|-------|
| [Arrow](https://www.arrow.com/en/products/attiny45-20mu/microchip-technology.html?utm_currency=USD®ion=nac) | N/A | N/A |
| [Digi-Key](https://www.digikey.com/en/products/detail/microchip-technology/ATTINY45-20MU/1008734) | $1.10 | 2.5K |
| [LCSC](https://www.lcsc.com/product-detail/C145594.html) | $1.2326 | 0 |
| [Mouser](https://www.mouser.com/ProductDetail/Microchip-Technology/ATTINY45-20MU?qs=8jWQYweyg6MOAVG8HDOi4w%3D%3D) | $1.10 | 350 |
| [Verical](https://www.verical.com/pd/microchip-technology-microcontroller-ATTINY45-20MU-2631566?utm_currency=USD) | N/A | N/A |
- **Part Type:** Integrated Circuits
- **Sub-Type:** Logic
- **Manufacturer:** Microchip
- **MPN:** ATTINY45-20MU
- **Mount Type:** PCB
- **Package / Case Code:** 20-QFN
- **Pin Count:** 21
- **Logic Function:** AND
## Pins
| Pin | Name | Type |
|-----|------|------|
| 1 | PB5(PCINT5/~{RESET}/ADC0/dW) | |
| 2 | PB3(PCINT3/XTAL1/CLKI/~{OC1B}/ADC3) | |
| 3 | DNC | |
| 4 | DNC | |
| 5 | PB4(PCINT4/XTAL2/CLKO/OC1B/ADC2) | |
| 6 | DNC | |
| 7 | DNC | |
| 8 | GND | |
| 9 | DNC | |
| 10 | DNC | |
| 11 | PB0(MOSI/DI/SDA/AIN0/OC0A/~{OC1A}/AREF/PCINT0) | |
| 12 | PB1(MISO/DO/AIN1/OC0B/OC1A/PCINT1) | |
| 13 | DNC | |
| 14 | PB2(SCK/USCK/SCL/ADC1/T0/INT0/PCINT2) | |
| 15 | VCC | |
| 16 | DNC | |
| 17 | DNC | |
| 18 | DNC | |
| 19 | DNC | |
| 20 | DNC | |
| 21 | EP | |
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*Generated from [https://www.flux.ai/lcsc/attiny45-20mu](https://www.flux.ai/lcsc/attiny45-20mu)*