| Programmable | Not Verified |
| Core Processor | 8051 |
| Core Size | 8-Bit |
| Speed | 25MHz |
| Connectivity | SPI, UART/USART |
| Peripherals | Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT |
| Number of I/O | 6 |
| Program Memory Size | 8KB (8K x 8) |
| Program Memory Type | FLASH |
| RAM Size | 256 x 8 |
| Voltage - Supply (Vcc/Vdd) | 1.8V ~ 5.25V |
| Data Converters | A/D 6x12b |
| Oscillator Type | Internal |
| Operating Temperature | -40°C ~ 125°C (TA) |
| Mounting Type | Surface Mount |
| Supplier Device Package | 10-DFN (3x3) |
| Package / Case | 10-VFDFN Exposed Pad |
| Packaging | Tube |
| Standard Pack Qty | 122 |
| Alternate Packaging | C8051F521A-IMR |
| Suggested Replacement | C8051F521-C-IM |
| Category | 8-bit Microcontrollers - MCU |
| RoHS | RoHS Compliant |
| Lifecycle | End of Life |
| Reported Lead Time | 24 Days (from factory) |
| Country | Code |
|---|---|
| CNHTS | 8542319092 |
| CAHTS | 8542310000 |
| USHTS | 8542310075 |
| JPHTS | 8542310324 |
| KRHTS | 8542311000 |
| TARIC | 8542319000 |
| MXHTS | 8542310399 |
| ECCN | 3A991.a.2 |
