ATMEGA328-MU vs ATMEGA328PB-MU Comparison
Detailed side-by-side comparison of ATMEGA328-MU by Microchip Technology and ATMEGA328PB-MU 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-MU - 8-bit AVR MCU 32KB Flash 20MHz | Microchip
ATMEGA328-MU ✓ ActiveMicrochip Technology
ATMEGA328PB-MU - 8-Bit AVR MCU 20MHz 32KB Flash | Microchip
ATMEGA328PB-MU ✓ ActiveSpecification Comparison
| Parameter | ATMEGA328-MU | ATMEGA328PB-MU |
|---|---|---|
| Brand | Microchip Technology | Microchip Technology |
| Category | Microcontrollers | Microcontrollers |
| Lifecycle Status | Active | Active |
| Stock Status | In Stock | In Stock |
| Unit Price (USD) | $2.20 | $1.19 |
| Core Architecture | AVR 8-bit RISC | AVR 8-bit RISC |
| Flash Program Memory | 32 KB (16K x 16) | — |
| SRAM | 2 KB | — |
| EEPROM | 1 KB | — |
| Maximum CPU Speed | 20 MHz (20 MIPS) | — |
| Supply Voltage | 1.8 V to 5.5 V | [DATA_NEEDED: VCC range] |
| Operating Temperature (Industrial) | -40C to +85C | — |
| I/O Pins | 23 general-purpose | — |
| ADC | 10-bit, 8 channels, up to 15 kSPS | — |
| Timers | 2 x 8-bit + 1 x 16-bit | 2 x 8-bit, 1 x 16-bit |
| Communication Interfaces | 1x USART, 1x SPI, 1x I2C (TWI) | USART, 2 x SPI, 2 x I2C (TWI) |
| Package | 32-pin VQFN (5x5 mm) with EP | 32-VFQFN (5x5 mm) |
| Mounting Type | Surface Mount | Surface Mount |
| On-chip Debug | debugWIRE | — |
| Instruction Set | 131 instructions, mostly single-cycle | — |
| Power-down Mode Current | < 1 uA (typical, datasheet) | — |
| MSL Level | MSL3 (per JEDEC J-STD-020, typical for VQFN) | — |
| Core Size | — | 8-Bit |
| Maximum Clock Frequency | — | 20 MHz |
| Program Memory Size | — | 32 KB (16K x 16) FLASH |
| SRAM Size | — | 2 KB |
| EEPROM Size | — | 1 KB |
| Performance | — | Approx. 1 MIPS per MHz |
| I/O Count | — | 27 GPIO (incl. PORTE [3:0] on QFN) |
| Operating Temperature | — | -40C to +85C (Industrial) |
| ADC Resolution | — | 10-bit |
| Low Power Technology | — | picoPower, multiple sleep modes |
| Programming | — | ISP, debugWIRING, self-programming boot loader |
| Safety Qualification | — | Functional Safety (FuSa) supported per DigiKey |
| RoHS Status | — | Compliant (GREEN package per FindIC) |