ATMEGA16A-PU 8-Bit High-Performance AVR Microcontroller DIP-40 (ATMEGA16A-PU IC)

The ATMEGA16A-PU is a high-performance, low-power 8-bit AVR RISC-based microcontroller from Microchip (formerly Atmel). Housed in a large 40-pin DIP package, it is a versatile choice for complex embedded systems that require more I/O and memory than smaller controllers. It features 16KB of In-System Programmable Flash, 512 bytes of EEPROM, and 1KB of SRAM, making it capable of handling sophisticated firmware for automation and robotics.

This IC is a standard in India for engineering projects, industrial controllers, and educational development kits. Its through-hole design is perfect for prototyping on breadboards or soldering onto general-purpose PCBs. With 32 programmable I/O lines and an integrated 8-channel 10-bit ADC, it provides ample connectivity for sensors, displays, and actuators without needing many external components.

Key Features

• Advanced RISC Architecture: 131 powerful instructions, most of which execute in a single clock cycle for high-speed performance.
• Non-Volatile Memory: High-endurance 16KB Flash memory with a 20-year data retention rating.
• Peripheral Rich: Includes two 8-bit timers, one 16-bit timer, and four PWM channels for motor and LED control.
• JTAG Interface: Supports boundary-scan, on-chip debugging, and programming for professional-level development.
• Internal Calibrated Oscillator: Allows for operation without an external crystal, though it supports up to 16MHz with one.
• Versatile Serial Communication: Features a programmable USART, Master/Slave SPI, and a byte-oriented Two-wire Serial Interface (I2C compatible).
• Multiple Sleep Modes: Six power-saving modes (Idle, ADC Noise Reduction, Power-save, Power-down, Standby, and Extended Standby) to optimize energy use.

Specifications

• IC Type: 8-Bit Microcontroller (MCU)
• Program Memory: 16 KB Flash
• SRAM / EEPROM: 1024 Bytes / 512 Bytes
• Maximum Speed: 16 MHz
• Operating Voltage: 2.7V to 5.5V
• I/O Pins: 32 Programmable I/O Lines
• A/D Converter: 8-channel, 10-bit resolution
• Package Type: PDIP-40
• Mounting Style: Through-Hole
• Operating Temperature: -40 to +85 degrees Celsius

Pinout Highlights (40-Pin DIP)

• Pins 1-8 (PB0-PB7): Port B I/O pins (Includes SPI and Timer functions).
• Pin 9 (RESET): Reset Input (Active low).
• Pin 10 (VCC): Digital Supply Voltage.
• Pin 11 (GND): Ground.
• Pin 12 (XTAL2): Crystal Oscillator Output.
• Pin 13 (XTAL1): Crystal Oscillator Input.
• Pins 14-21 (PD0-PD7): Port D I/O pins (Includes USART and Interrupts).
• Pins 22-29 (PC0-PC7): Port C I/O pins (Includes JTAG and I2C/TWI).
• Pin 30 (AVCC): Supply Voltage for Port A and ADC.
• Pin 31 (GND): Ground.
• Pin 32 (AREF): Analog Reference Pin for ADC.
• Pins 33-40 (PA0-PA7): Port A I/O pins (Analog Inputs for ADC).