ATTINY25-15SZ

Introduction to ATTINY25-15SZ
- A small 8-bit AVR microcontroller from Microchip/Atmel’s TinyAVR family.
- 8-pin device (package variants available) designed for compact, low-cost, low-power tasks.
- Core and speed: 8-bit AVR core, up to about 15 MHz operation (speed grade indicated by “-15”).
- Memory: small on-chip memory suitable for simple firmware (exact flash/RAM/EEPROM depends on the specific tiny25/45/85 variant).
- Peripherals: clock/Timers, a 10‑bit ADC with multiple channels, USI (SPI/I2C), watchdog, interrupts.
- I/O: multiple general-purpose I/O pins for simple sensors and controls.
- Power: operates from roughly 1.8–5.5 V with various low-power sleep modes.
- Programming: typically via SPI (ICSP); supported by standard AVR toolchains (AVR-GCC, avrdude).
- Usage: ideal for hobby projects, small sensors, and other compact embedded tasks.
Note: “-15” is the speed grade; “SZ” relates to packaging/temperature options. For exact memory sizes and I/O specifics, consult the official datasheet.

Key features of ATtiny25-15SZ (8-pin AVR):
- 8-bit AVR RISC microcontroller
- Maximum clock: up to 15 MHz
- Memory: 2 KB Flash, 128 B SRAM, 128 B EEPROM
- I/O: 6 general-purpose I/O pins (PB0–PB5)
- ADC: 4‑channel, 10-bit A/D converter
- Timers: Timer/Counter0 (8-bit, PWM); Timer/Counter1 (16-bit, PWM)
- Serial interface: USI (supports SPI/I2C)
- PWM outputs: up to 2 OC outputs (depending on pins)
- Peripherals: Watchdog Timer, Brown-out Detector
- Sleep modes: Idle, ADC Noise Reduction, Power-down
- Programming: In-system programming (ISP)
- Package: SZ (8-pin small package)
- Supply voltage: 1.8–5.5 V (low-power operation)

- Pin count: 8 pins
- Function: 8‑bit AVR microcontroller (ATtiny25) in an 8-pin package, with 6 I/O pins (PB0–PB5) plus RESET, VCC, and GND; includes built-in timers, ADC, and serial interfaces for small embedded control tasks.

Manufacturer: Microchip Technology Inc. (the Atmel AVR line, including ATTINY25, is now part of Microchip after acquiring Atmel).
What kind of company: A global American semiconductor company that designs, manufactures, and sells microcontrollers (AVR and other families), memory, and analog/embedded ICs.

ATtiny25-15SZ is a tiny, low-power 8‑bit MCU ideal for compact, cost‑sensitive control tasks. Common application areas include:
- Battery-powered sensors and wearables (long sleep modes)
- Small consumer electronics (remote controls, keyboards, toys, handheld gadgets)
- LED lighting and indicator drivers (PWM dimming, blink patterns)
- Simple data logging and measurement devices (temperature, light, gas sensors)
- Basic automation and appliance controls (thermostats, fans, switches)
- Hobby projects and prototyping (education, robotics, Arduino-style use)

8-pin SOIC (Small Outline Integrated Circuit) surface-mount package.