ATMEGA8A-AN
ATMEGA8A-AN - 8-Bit AVR MCU 16MHz 8KB Flash | Microchip
The Microchip Technology ATMEGA8A-AN is an 8-bit AVR RISC microcontroller with 8 KB of in-system programmable Flash, 512 B EEPROM, 1 KB SRAM, 23 general-purpose I/O lines, and a 16 MHz maximum operating frequency, housed in a 32-pin TQFP (7x7 mm) package. It operates from 2.7 V to 5.5 V and delivers up to 16 MIPS throughput at 16 MHz.
An 8-bit microcontroller is a single-chip computer that integrates a CPU, program memory (Flash), data memory (SRAM), non-volatile storage (EEPROM), and peripherals such as timers, serial interfaces, and analog-to-digital converters on one die. The AVR architecture is a modified Harvard RISC core that executes most instructions in a single clock cycle, giving the ATmega8A deterministic, low-latency response for real-time control. In the product hierarchy, the ATmega8A sits under 8-bit AVR microcontrollers, which belong to the broader microcontroller (MCU) family within embedded processing ICs.
Key features include 8 KB Flash with read-while-write capability, 512 B EEPROM for parameter storage, 1 KB SRAM, 23 programmable I/O lines, three flexible timer/counters with compare modes, an 8-channel 10-bit ADC, a programmable USART, and both SPI and TWI (I2C) serial interfaces. The device supports in-system programming (ISP) and a boot loader, enabling field firmware updates without removing the chip.
The ATmega8A is fabricated on Microchip's high-performance, low-power CMOS process and is pin-compatible with the original ATmega8, making it a direct replacement in existing designs. Its 16 MHz maximum clock at 4.5-5.5 V and 8 MHz at 2.7-4.5 V give designers a clear voltage-frequency trade-off for power-sensitive products.
Typical applications include motor control boards, USBasp programmer hardware, battery chargers, sensor nodes, and legacy industrial controllers. The 32-TQFP package with 0.8 mm pitch suits automated SMT assembly, and the 23 I/O lines provide enough headroom for keypad, display, and communication interfaces in compact designs.
When designing with the ATMEGA8A-AN, decouple VCC and AVCC with 100 nF ceramic capacitors placed close to the pins, and connect the AREF pin through a low-pass filter when using the ADC. Keep the reset pin pulled high through 10 kohm and provide an ISP header for programming.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a single reference for selection, cross-referencing, and layout decisions.
USD $1,58
Em estoque