Microchip Technology ATTINY461-20MU

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Product attributes Property Value
Manufacturer Microchip Technology
Product Series AVR® ATtiny
Packaging Tray |
Core Processor AVR
Core Size 8-Bit
Speed 20MHz
Connectivity USI
Peripherals Brown-out Detect/Reset, POR, PWM, WDT
Number of I/O 16
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 11x10b
Oscillator Type Internal
Operating Temperature -40°C ~ 85°C (TA)
Grade -
Qualification AEC -
Mounting Type Surface Mount
Supplier Device Package 32-VQFN (5x5)
Package / Case 32-VFQFN Exposed Pad
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The ATTINY461-20MU is an 8-bit AVR microcontroller from Atmel, delivering 20MHz performance in a compact 32-VFQFN package. With 4KB flash and 256 bytes RAM, it integrates essential features like brown-out detection, power-on reset, PWM, and a watchdog timer. Its 2.7V to 5.5V supply range supports both 3.3V and 5V systems, making it ideal for space-constrained embedded control applications.

  • High-speed AVR core: 20MHz execution for real-time control tasks.
  • Wide voltage range: 2.7V-5.5V simplifies power supply design.
  • Integrated safety features: BOD and POR enhance system reliability.
  • Compact QFN package: Saves PCB space for miniaturized designs.

Compact Sensor Nodes

The 32-VFQFN package and 20MHz AVR core enable dense sensor interfaces in IoT edge devices, with PWM for actuator control.

Battery-Powered Controllers

Operating from 2.7V to 5.5V, it directly runs from 3V coin cells or 5V USB, while WDT ensures reliable wake-up scheduling.

Motor Control Hobby Kits

With 4KB flash and hardware PWM, it handles small DC motor speed control with minimal external components.

Industrial Signal Conditioning

Brown-out detection and POR protect against supply glitches in 24V industrial environments when paired with level shifters.

Automotive Aftermarket Modules

The -40°C to 85°C range suits cabin-mounted modules like window controllers, using the 20MHz speed for fast response.

LED Lighting Drivers

PWM channels drive constant-current LED drivers, while the small footprint fits into bulb housings.

Q: What is the maximum operating frequency of the ATTINY461-20MU?
A: The ATTINY461-20MU operates at up to 20MHz with a supply voltage range of 2.7V to 5.5V.
Q: What package is the ATTINY461-20MU available in?
A: It comes in a 32-VFQFN exposed pad package, suitable for compact PCB designs.
Q: Does the ATTINY461-20MU include a watchdog timer?
A: Yes, it features a Watchdog Timer (WDT) along with Brown-out Detection and Power-On Reset.
Q: What is the program memory size?
A: It has 4KB of in-system programmable flash memory (2K x 16 bits).
Base Product Number : ATTINY461
20MHz 4KB Flash 8-bit MCU Atmel AVR Industrial IoT PWM QFN-32 WDT
Q: What is the maximum operating frequency of the ATTINY461-20MU?
A: The ATTINY461-20MU operates at up to 20MHz with a supply voltage range of 2.7V to 5.5V.
Q: What package is the ATTINY461-20MU available in?
A: It comes in a 32-VFQFN exposed pad package, suitable for compact PCB designs.
Q: Does the ATTINY461-20MU include a watchdog timer?
A: Yes, it features a Watchdog Timer (WDT) along with Brown-out Detection and Power-On Reset.
Q: What is the program memory size?
A: It has 4KB of in-system programmable flash memory (2K x 16 bits).