ATMEGA328-AU vs ATMEGA328P-ANR Comparison
Detailed side-by-side comparison of ATMEGA328-AU by Microchip Technology and ATMEGA328P-ANR by Microchip Technology. Compare key specifications, electrical parameters, packaging, lifecycle status, pricing, and availability to determine the best component for your design requirements.
Microchip Technology
ATMEGA328-AU - 8-bit AVR MCU 20MHz 32KB Flash TQFP-32 | Microchip (Tape & Reel)
ATMEGA328-AU ✓ ActiveMicrochip Technology
ATMEGA328P-ANR - 8-Bit 20MHz AVR MCU 32KB Flash | Microchip (Tape & Reel)
ATMEGA328P-ANR ✓ ActiveSpecification Comparison
| Parameter | ATMEGA328-AU | ATMEGA328P-ANR |
|---|---|---|
| Brand | Microchip Technology | Microchip Technology |
| Category | Microcontrollers | Microcontrollers |
| Lifecycle Status | Active | Active |
| Core Processor | AVR 8-bit RISC | — |
| Core Size | 8-bit | — |
| Speed | 20 MHz | — |
| Flash Memory | 32 KB (16K x 16) | 32 KB (16K × 16) |
| EEPROM | 1 KB | 1 KB |
| SRAM | 2 KB | 2 KB |
| Number of I/O | 23 | — |
| ADC Resolution | 10-bit | — |
| Number of ADC Channels | 8 (TQFP-32) | — |
| Timers/Counters | 2 x 8-bit, 1 x 16-bit | — |
| Communication Interfaces | USART, SPI, TWI (I2C) | — |
| Supply Voltage Range | 2.5 V to 5.5 V | — |
| Operating Temperature | -40C to +85C | 105°C |
| Package | 32-TQFP (7x7 mm) | 32-TQFP (7 mm × 7 mm) |
| Mounting Type | Surface Mount | Surface mount |
| Packaging | Tape & Reel (R suffix) | — |
| Programmability | In-System Programmable (ISP), read-while-write | — |
| RoHS Status | Compliant | — |
| Product Type | — | 8-bit AVR RISC-based microcontroller |
| Maximum Clock Frequency | — | 20 MHz |
| General-Purpose I/O Lines | — | 23 |
| General-Purpose Working Registers | — | 32 |
| Timer/Counter Count | — | 3 |
| Timer/Counter Features | — | Compare modes |
| Serial Communication | — | USART |
| Two-Wire Interface | — | Byte-oriented |
| Interrupt Support | — | Internal and external interrupts |
| Programming | — | In-system programmable ISP Flash |
| Flash Read-While-Write | — | Supported |
| Core Architecture | — | AVR 8-bit RISC |
| Pricing Reference | — | LCSC price from $3.3765 as of 2026-10-21 |