ATMEGA328-MU vs ATMEGA328P-MU Comparison
Detailed side-by-side comparison of ATMEGA328-MU by Microchip Technology and ATMEGA328P-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 ✓ Active
Specification Comparison
| Parameter | ATMEGA328-MU | ATMEGA328P-MU |
|---|---|---|
| Brand | Microchip Technology | Microchip Technology |
| Category | Microcontrollers | Microcontrollers |
| Lifecycle Status | Active | NRND |
| Stock Status | In Stock | In Stock |
| Unit Price (USD) | $2.20 | $2.85 |
| Core Architecture | AVR 8-bit RISC | AVR 8-bit RISC |
| Flash Program Memory | 32 KB (16K x 16) | 32 KB (16 K x 16) |
| SRAM | 2 KB | 2 KB |
| EEPROM | 1 KB | 1 KB |
| Maximum CPU Speed | 20 MHz (20 MIPS) | — |
| Supply Voltage | 1.8 V to 5.5 V | — |
| Operating Temperature (Industrial) | -40C to +85C | — |
| I/O Pins | 23 general-purpose | — |
| ADC | 10-bit, 8 channels, up to 15 kSPS | 10-bit, 8 channels (6 + 2 dedicated QFN/VFP) |
| Timers | 2 x 8-bit + 1 x 16-bit | — |
| Communication Interfaces | 1x USART, 1x SPI, 1x I2C (TWI) | USART, SPI (master/slave), TWI (I2C-compatible) |
| Package | 32-pin VQFN (5x5 mm) with EP | 32-pin VQFN (5x5 mm, exposed pad) |
| 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) | — |
| Maximum Clock Speed | — | 20 MHz |
| Instruction Throughput | — | 20 MIPS |
| Operating Voltage Range | — | 1.8 V to 5.5 V |
| General-Purpose I/O | — | 23 lines |
| Timers/Counters | — | 2 x 8-bit, 1 x 16-bit |
| On-chip Oscillator | — | Internal 8 MHz calibrated, 128 kHz |
| Operating Temperature | — | -40 C to +85 C (industrial) |
| Programming Interface | — | ISP, debugWIRE, TPI |
| RoHS Status | — | Compliant |