ATMEGA162L-8AC
ATMEGA162L-8AC - 8MHz AVR MCU 16KB Flash TQFP-44 | Microchip
The Microchip Technology (Atmel) ATMEGA162L-8AC is an 8-bit AVR ATmega microcontroller with 16KB in-system programmable Flash, 1KB SRAM, 512B EEPROM, and an 8MHz maximum clock speed, housed in a 44-pin TQFP (10x10 mm) surface-mount package with 35 general-purpose I/O lines.
An 8-bit AVR microcontroller is a single-chip processor based on the AVR enhanced RISC architecture, which executes most of its 131 powerful instructions in a single clock cycle, achieving throughput close to 1 MIPS per MHz. Within the embedded system hierarchy, the MCU sits at the control layer, integrating program memory (Flash), data memory (SRAM), nonvolatile storage (EEPROM), and peripherals such as UARTs, timers, SPI, and an ADC into one device, reducing board count versus discrete logic designs.
Key features include 16KB (8K x 16) self-programmable Flash, 1KB internal SRAM, 512B EEPROM, two 8-bit and one 16-bit timer with PWM capability, two hardware USARTs for dual serial channels, SPI and TWI (I2C) serial interfaces, a 10-bit ADC with up to 8 multiplexed single-ended channels, an on-chip JTAG boundary-scan and debug port, and an external memory interface supporting up to 64KB of optional external SRAM.
Architecturally, the ATmega162 pairs the AVR RISC core with a Harvard-structured memory bus, so instruction fetch and data access occur in parallel. In-system programmability lets firmware be updated after board assembly through SPI, while the JTAG port supports on-chip debugging and boundary-scan testing per the IEEE 1149.1 method used in the AVR family. The low-voltage L variant is rated for operation from 2.7V to 5.5V, suiting 3.3V systems.
Typical applications include industrial control panels, dual-UART communication gateways, building automation nodes, and legacy AVR designs where 5V-tolerant I/O, JTAG debug, and dual serial ports are required. The 35 I/O lines comfortably drive keys, relays, and LED indicators directly.
Design consideration: the L suffix limits safe clocking to 8MHz; to hit 16MHz you must migrate to the ATMEGA162-16AC/AU grade at 4.5V to 5.5V. Keep the RESET pin and JTAG fuse settings in mind during layout.
This page synthesizes distributor pricing, drop-in alternatives, pinout, and practical design notes not found in the manufacturer datasheet alone.
USD $4,48
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