Microchip Technology ATTINY45-20MUR
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $1.15 | $1.15 |
| 15+ | $1.11 | $16.65 |
| 25+ | $1.09 | $27.25 |
| 50+ | $1.03 | $51.50 |
| 100+ | $0.91 | $91.00 |
| N+ | $0.18 | Price Inquiry |
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| Product attributes | Property Value |
| Manufacturer | Microchip Technology |
| Product Series | AVR® ATtiny, Functional Safety (FuSa) |
| Packaging | Cut Tape (CT) | NULL |
| Core Processor | AVR |
| Core Size | 8-Bit |
| Speed | 20MHz |
| Connectivity | USI |
| Peripherals | Brown-out Detect/Reset, POR, PWM, WDT |
| Number of I/O | 6 |
| Program Memory Size | 4KB (2K x 16) |
| Program Memory Type | FLASH |
| EEPROM Size | 256 x 8 |
| RAM Size | 256 x 8 |
| Voltage - Supply (Vcc/Vdd) | 2.7V ~ 5.5V |
| Data Converters | A/D 4x10b |
| Oscillator Type | Internal |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Grade | - |
| Qualification AEC | - |
| Mounting Type | Surface Mount |
| Supplier Device Package | 20-QFN-EP (4x4) |
| Package / Case | 20-WFQFN Exposed Pad |
| ROHS |
The Microchip ATTINY45-20MUR is an 8-bit AVR MCU with 4KB flash and 256B RAM, running at 20MHz. Its 2.7V~5.5V range and integrated BOD, POR, PWM, and WDT make it a compact solution for cost-sensitive embedded control in a 20-WFQFN package.
- High-speed 20MHz AVR core: Delivers fast response for time-critical tasks.
- Wide supply voltage (2.7V~5.5V): Flexible for battery or regulated power.
- Integrated BOD and POR: Prevents data corruption during power events.
- Small 20-WFQFN package: Saves board space in miniaturized designs.
LED Lighting Control
PWM channels and 20MHz speed allow smooth dimming and color mixing.
Battery Management
Low power AVR core with 2.7V~5.5V suits portable battery monitors.
Sensor Interfacing
Small 20-pin package with analog inputs for temperature and pressure sensors.
Motor Drivers
Fast PWM generation for small DC motor speed control in toys and pumps.
Consumer Electronics
Compact footprint and robust reset circuitry for remote controls and wearables.
Automotive Accessories
WDT and brown-out detection ensure reliable operation in 12V vehicle systems.
- Q: What is the maximum clock speed?
- A: It runs at 20MHz with a 2.7V~5.5V supply.
- Q: How much program memory does it have?
- A: It has 4KB flash (2K x 16) and 256 bytes RAM.
- Q: What package is this?
- A: It comes in a 20-WFQFN exposed pad package.
- Q: Does it include safety features?
- A: Yes, it has Brown-out Detect/Reset, POR, PWM, and WDT.
- Q: What temperature range is supported?
- A: It operates from -40°C to 85°C.
- Q: What is the maximum clock speed?
- A: It runs at 20MHz with a 2.7V~5.5V supply.
- Q: How much program memory does it have?
- A: It has 4KB flash (2K x 16) and 256 bytes RAM.
- Q: What package is this?
- A: It comes in a 20-WFQFN exposed pad package.
- Q: Does it include safety features?
- A: Yes, it has Brown-out Detect/Reset, POR, PWM, and WDT.
- Q: What temperature range is supported?
- A: It operates from -40°C to 85°C.

ATTINY45-20MUR.pdf