ATSAMD21G18A-MU vs ATSAMD51G18A-MU Comparison
Detailed side-by-side comparison of ATSAMD21G18A-MU by Microchip Technology and ATSAMD51G18A-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
ATSAMD21G18A-MU - 256KB Flash Cortex-M0+ MCU, 48MHz | Microchip
ATSAMD21G18A-MU ✓ ActiveMicrochip Technology
ATSAMD51G18A-MU - 120MHz ARM Cortex-M4F MCU 256KB Flash | Microchip
ATSAMD51G18A-MU ✓ ActiveSpecification Comparison
| Parameter | ATSAMD21G18A-MU | ATSAMD51G18A-MU |
|---|---|---|
| Brand | Microchip Technology | Microchip Technology |
| Category | Microcontrollers | Microcontrollers |
| Lifecycle Status | Active | Active |
| Stock Status | In Stock | In Stock |
| Unit Price (USD) | $3.15 | $3.88 |
| Core Architecture | ARM Cortex-M0+ (32-bit) | — |
| Family | SAM D21 (FuSa / IEC 60730 Class B) | SAM D51 (D5x/E5x family) |
| Max CPU Frequency | 48 MHz | — |
| Flash Memory | 256 KB | — |
| SRAM | 32 KB | 128 KB (with ECC) |
| Supply Voltage | 1.62 V to 3.6 V | — |
| Operating Temperature | -40 C to +85 C (industrial) | -40 C to +85 C (industrial) |
| Package | 48-pin QFN (7x7 mm) | 48-VQFN (7x7 mm) with exposed pad |
| USB | USB 2.0 Full-Speed Device with on-chip transceiver | USB 2.0 Full-Speed and High-Speed with on-chip PHY |
| ADC | 12-bit, up to 350 ksps, up to 20 channels | 12-bit, up to 1 Msps, 16 channels |
| DAC | 10-bit, 350 ksps | Two 12-bit outputs |
| SERCOM Modules | 6 (each configurable as USART / I2C / SPI / LIN) | — |
| Timers/Counters | TC (8-bit / 16-bit), TCC (16-bit PWM) | — |
| RTC | 32-bit RTC with calendar | — |
| GPIOs | 38 | — |
| DMA Channels | 12 | — |
| Event System Channels | 12 | — |
| Touch Peripheral | PTC (Peripheral Touch Controller) | — |
| RoHS Status | Compliant (Green) | Compliant |
| Core | — | ARM Cortex-M4F |
| CPU Architecture | — | 32-bit RISC with FPU and DSP |
| Maximum CPU Clock | — | 120 MHz |
| Performance | — | 1.25 DMIPS/MHz |
| Program Flash | — | 256 KB (with ECC) |
| Operating Voltage | — | 1.71 V to 3.63 V |
| Ethernet | — | 10/100 MAC (requires external PHY) |
| Serial Interfaces | — | Up to 6 SERCOM (configurable I2C/SPI/UART) |
| I/O Pins | — | Up to 37 GPIO |
| Cryptography | — | TRNG, AES, SHA hardware accelerator |
| Mounting Type | — | Surface Mount |
| MSL Level | — | 3 (168 hours) |