ATMEGA328-AU vs ATMEGA328P-AUR Comparison
Detailed side-by-side comparison of ATMEGA328-AU by Microchip Technology and ATMEGA328P-AUR 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-AUR - 8-bit AVR MCU, 32KB Flash, 20MHz, TQFP-32 | Microchip
ATMEGA328P-AUR ✓ ActiveSpecification Comparison
| Parameter | ATMEGA328-AU | ATMEGA328P-AUR |
|---|---|---|
| Brand | Microchip Technology | Microchip Technology |
| Category | Microcontrollers | Microcontrollers |
| Lifecycle Status | Active | Active |
| Stock Status | In Stock | In Stock |
| Unit Price (USD) | $1.65 | $2.18 |
| Core Processor | AVR 8-bit RISC | — |
| Core Size | 8-bit | — |
| Speed | 20 MHz | — |
| Flash Memory | 32 KB (16K x 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) | USART, SPI, I2C (TWI) |
| Supply Voltage Range | 2.5 V to 5.5 V | 1.8 V to 5.5 V |
| Operating Temperature | -40C to +85C | — |
| Package | 32-TQFP (7x7 mm) | 32-pin TQFP, 7x7 mm, 0.8 mm pitch |
| Mounting Type | Surface Mount | Surface Mount |
| Packaging | Tape & Reel (R suffix) | — |
| Programmability | In-System Programmable (ISP), read-while-write | — |
| RoHS Status | Compliant | Compliant |
| Core Architecture | — | AVR 8-bit RISC |
| Program Memory (Flash) | — | 32 KB |
| Maximum Clock Frequency | — | 20 MHz |
| Operating Temperature Range | — | -40 C to +85 C (Industrial) |
| I/O Pins | — | 23 programmable |
| ADC | — | 10-bit, up to 8 channels |
| PWM Channels | — | 6 |
| Timers | — | 2 x 8-bit, 1 x 16-bit |
| Instruction Set | — | 131 instructions, mostly single-cycle |
| Working Registers | — | 32 x 8-bit |
| Watchdog Timer | — | Yes, with separate on-chip oscillator |
| Brown-out Detection | — | Yes |
| Power-Saving Modes | — | 6 software-selectable |
| MSL Level | — | 3 (168 hours) |
| Throughput | — | 20 MIPS at 20 MHz |