Microchip Technology ATTINY40-MMHR
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $0.92 | $0.92 |
| 15+ | $0.89 | $13.35 |
| 25+ | $0.87 | $21.75 |
| 50+ | $0.82 | $41.00 |
| 100+ | $0.73 | $73.00 |
| N+ | $0.15 | Price Inquiry |
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| Product attributes | Property Value |
| Manufacturer | Microchip Technology |
| Product Series | AVR® ATtiny |
| Packaging | Cut Tape (CT) | Tape & Reel (TR) |
| Core Processor | AVR |
| Core Size | 8-Bit |
| Speed | 12MHz |
| Connectivity | I2C, SPI |
| Peripherals | Brown-out Detect/Reset, POR, PWM, WDT |
| Number of I/O | 18 |
| Program Memory Size | 4KB (2K x 16) |
| Program Memory Type | FLASH |
| EEPROM Size | - |
| RAM Size | 256 x 8 |
| Voltage - Supply (Vcc/Vdd) | 1.8V ~ 5.5V |
| Data Converters | A/D 12x10b |
| Oscillator Type | Internal |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Grade | - |
| Qualification AEC | - |
| Mounting Type | Surface Mount |
| Supplier Device Package | 20-VQFN (3x3) |
| Package / Case | 20-VFQFN Exposed Pad |
| ROHS |
The Microchip ATTINY40-MMHR is an 8-bit AVR MCU in a 20-VFQFN package, running at 12MHz. It offers 4KB flash and 256B SRAM, with a wide 1.8V-5.5V supply range. Integrated brown-out detection, POR, PWM, and WDT provide robust operation for compact embedded designs.
- Ultra-small 20-VFQFN package: Saves board space in miniaturized products.
- 1.8V-5.5V operation: Supports single-cell battery or regulated 5V supplies.
- Integrated brown-out detection: Prevents erratic behavior during voltage dips.
- 12MHz AVR core: Balanced performance for real-time control tasks.
Compact IoT Sensor Endpoints
Small QFN package and low pin count make it ideal for space-constrained wireless sensor nodes.
Battery Management in Wearables
1.8V operation extends battery life in fitness trackers and smart watches.
Motor Control for Drones
PWM outputs at 12MHz provide precise ESC signals for small brushless motors.
LED Lighting Effects
4KB flash stores multiple animation patterns; PWM drives RGB LEDs directly.
Security Keypads
Brown-out detection ensures reliable key scanning in access control panels.
Analog Sensor Conditioning
Internal POR and WDT maintain stable operation in noisy industrial environments.
- Q: What is the maximum clock speed of ATTINY40-MMHR?
- A: It runs at 12MHz with a 1.8V-5.5V supply.
- Q: How much program memory does it have?
- A: It has 4KB flash (2K x 16) and 256 bytes of SRAM.
- Q: What package is available?
- A: It comes in a 20-pad VFQFN package with exposed pad for thermal relief.
- Q: Does it include brown-out detection?
- A: Yes, it has Brown-out Detect/Reset, POR, PWM, and WDT.
- Q: What is the temperature range?
- A: It operates from -40°C to +85°C.
- Q: What is the maximum clock speed of ATTINY40-MMHR?
- A: It runs at 12MHz with a 1.8V-5.5V supply.
- Q: How much program memory does it have?
- A: It has 4KB flash (2K x 16) and 256 bytes of SRAM.
- Q: What package is available?
- A: It comes in a 20-pad VFQFN package with exposed pad for thermal relief.
- Q: Does it include brown-out detection?
- A: Yes, it has Brown-out Detect/Reset, POR, PWM, and WDT.
- Q: What is the temperature range?
- A: It operates from -40°C to +85°C.

ATTINY40-MMHR.pdf