ATMEGA8-16AI
ATMEGA8-16AI - 8-Bit AVR MCU 16MHz 8KB Flash | Microchip
The Microchip ATMEGA8-16AI is an 8-bit AVR RISC microcontroller with 8 KB of in-system programmable Flash, 1 KB SRAM, and 512 bytes EEPROM, running at up to 16 MHz and delivering up to 16 MIPS throughput, housed in a 32-pin TQFP (7x7 mm) package. It integrates a 10-bit successive-approximation ADC with 6 or 8 multiplexed channels, two 8-bit timers, one 16-bit timer, a programmable watchdog, an internal calibrated RC oscillator, and a full set of serial interfaces including USART, SPI, and a byte-oriented two-wire (I2C-compatible) interface.
An AVR microcontroller is a single-chip computer built around the AVR enhanced RISC architecture, a Harvard-architecture 8-bit core that executes most instructions in a single clock cycle from 32 general-purpose working registers. Within the semiconductor taxonomy, the ATmega8 sits at the entry level of the AVR ATmega family, which itself belongs to the broader class of 8-bit microcontrollers, embedded processors, and finally integrated circuits. The ATmega8 was the original device that popularized the AVR platform in hobbyist and industrial designs, and its register map and instruction set remain the reference point for later ATmega parts.
Key differentiators of the ATMEGA8-16AI include 8 KB self-programming Flash with an endurance rating of 10,000 write/erase cycles, 130 powerful instructions with most executing in a single clock cycle, 32 programmable I/O lines, and a wide 2.7 V to 5.5 V operating range. The 16 MHz maximum frequency at 4.5 V to 5.5 V makes it suitable for timing-sensitive control loops, while the 10-bit ADC with 15 kSPS conversion rate supports direct analog sensor interfacing without external converters.
The device uses Atmel's high-density nonvolatile memory process technology and a fully static core that can be clocked down to DC, enabling aggressive power reduction in battery-powered designs. Six sleep modes, including Idle, ADC Noise Reduction, Power-save, Power-down, Standby, and Extended Standby, allow the MCU to trade throughput for current consumption, with Power-down current in the low microampere range.
Typical applications include industrial motor and relay control, battery chargers and power supplies, handheld instrumentation, home automation nodes, and legacy embedded control boards. The integrated USART, SPI, and TWI interfaces make it a natural fit for designs that must bridge analog sensors to a host processor or field bus.
When designing with the ATMEGA8-16AI, note that the TQFP-32 package requires careful decoupling of AVCC and VCC, and that the internal RC oscillator should be calibrated if used as the system clock. The device is obsolete per distributor lifecycle data, so designs should plan for a migration path to the pin-compatible ATmega8A or the ATmega88 family.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a single reference for replacement planning and layout decisions.
Запрос цены
Контакты
