EFM8BB51F16G-C-QFN20R vs EFM8BB21F16G-C-QFN20R Comparison
Detailed side-by-side comparison of EFM8BB51F16G-C-QFN20R by Silicon Labs and EFM8BB21F16G-C-QFN20R by Silicon Labs. Compare key specifications, electrical parameters, packaging, lifecycle status, pricing, and availability to determine the best component for your design requirements.
Silicon Labs
EFM8BB51F16G-C-QFN20R - 50MHz 16KB 8051 MCU | Silicon Labs
EFM8BB51F16G-C-QFN20R ✓ ActiveSilicon Labs
EFM8BB21F16G-C-QFN20R - 50MHz 16KB 8-Bit MCU | Silicon Labs
EFM8BB21F16G-C-QFN20R UnknownSpecification Comparison
| Parameter | EFM8BB51F16G-C-QFN20R | EFM8BB21F16G-C-QFN20R |
|---|---|---|
| Brand | Silicon Labs | Silicon Labs |
| Category | Microcontrollers | Microcontrollers |
| Lifecycle Status | Active | Unknown |
| Stock Status | In Stock | In Stock |
| Unit Price (USD) | $0.59 | $0.00 |
| Product Type | 8-bit 8051 microcontroller | — |
| Core | CIP-51 8051 | CIP-51 8051-compatible 8-bit core |
| Operating Frequency | 50 MHz | — |
| Flash Memory | 16 kB | 16 KB |
| RAM | 1.28 kB | 2.25 KB |
| GPIO Count | 16 | — |
| Timer Count | 4 x 16-bit timers | — |
| PCA Channels | 3 | — |
| Supply Class | 5 V wide-supply platform | — |
| Operating Temperature | -40 °C to 85 °C | — |
| Package | 20-QFN, 3 x 3 mm | 20-QFN, 3x3 mm |
| Mounting Type | Surface mount | Surface Mount |
| Architecture | 8-bit | — |
| Communication Peripherals | Additional communication peripherals | — |
| DigiKey Description | CIP-51 8051 Busy Bee Microcontroller IC 8-Bit 50 MHz 16 kB Flash | — |
| Mouser Description | 8-bit MCU, 5 V, 8051, 50 MHz, 16 kB Flash, 1.28 kB RAM, 16 GPIO | — |
| LCSC Listed Price | From $0.5871 as of 2026-10-21 | — |
| RoHS Status | [DATA_NEEDED: RoHS status] | — |
| REACH Status | [DATA_NEEDED: REACH status] | — |
| AEC-Q100 Status | [DATA_NEEDED: AEC-Q100 status] | — |
| Maximum Clock Frequency | — | 50 MHz |
| Digital I/O | — | 16 lines |
| Supply Voltage | — | 2.5 V/3.3 V |
| Temperature Range | — | -40°C to +85°C |
| ADC | — | 1 unit, 12-bit, 15 channels |
| Analog Comparators | — | 2 low-current comparators |
| Programmable Counter Array | — | 3 channels |
| Timers | — | 5 x 16-bit timers |
| Series | — | EFM8 Busy Bee |
| Compliance | — | EU RoHS Compliant; REACH Compliant |
| Pricing | — | [DATA_NEEDED: current distributor unit price] |