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| Part Number | C8051F521A-IM | C8051F527A-IM | C8051F531A-IM | C8051F526A-IM | C8051F523A-IM | C8051F521A-IMR | C8051F524A-IM | C8051F520A-IM | C8051F521-IM |
|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs |
| Product Status | Active | Active | Active | Active | Active | Active | Active | Active | Obsolete |
| Core Processor | 8051 | 8051 | 8051 | 8051 | 8051 | 8051 | 8051 | 8051 | 8051 |
| Core Size | 8-Bit | 8-Bit | 8-Bit | 8-Bit | 8-Bit | 8-Bit | 8-Bit | 8-Bit | 8-Bit |
| Speed | 25MHz | 25MHz | 25MHz | 25MHz | 25MHz | 25MHz | 25MHz | 25MHz | 25MHz |
| Connectivity | SPI, UART/USART | SPI, UART/USART | SPI, UART/USART | LINbus, SPI, UART/USART | LINbus, SPI, UART/USART | SPI, UART/USART | SPI, UART/USART | LINbus, SPI, UART/USART | SPI, UART/USART |
| Peripherals | Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT | Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT | Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT | Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT | Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT | Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT | Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT | Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT | Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT |
| Number of I/O | 6 | 6 | 16 | 6 | 6 | 6 | 6 | 6 | 6 |
| Program Memory Size | 8KB (8K x 8) | 2KB (2K x 8) | 8KB (8K x 8) | 2KB (2K x 8) | 4KB (4K x 8) | 8KB (8K x 8) | 4KB (4K x 8) | 8KB (8K x 8) | 8KB (8K x 8) |
| Program Memory Type | Flash | Flash | Flash | Flash | Flash | Flash | Flash | Flash | Flash |
| EEPROM Size | - | - | - | - | - | - | - | - | - |
| RAM Size | 256 x 8 | 256 x 8 | 256 x 8 | 256 x 8 | 256 x 8 | 256 x 8 | 256 x 8 | 256 x 8 | 256 x 8 |
| Voltage - Supply (Vcc/Vdd) | 1.8V ~ 5.25V | 1.8V ~ 5.25V | 1.8V ~ 5.25V | 1.8V ~ 5.25V | 1.8V ~ 5.25V | 1.8V ~ 5.25V | 1.8V ~ 5.25V | 1.8V ~ 5.25V | 2V ~ 5.25V |
| Data Converters | A/D 6x12b | A/D 6x12b | A/D 16x12b | A/D 6x12b | A/D 6x12b | A/D 6x12b | A/D 6x12b | A/D 6x12b | A/D 6x12b |
| Oscillator Type | Internal | Internal | Internal | Internal | Internal | Internal | Internal | Internal | Internal |
| Operating Temperature | -40°C ~ 125°C (TA) | -40°C ~ 125°C (TA) | -40°C ~ 125°C (TA) | -40°C ~ 125°C (TA) | -40°C ~ 125°C (TA) | -40°C ~ 125°C (TA) | -40°C ~ 125°C (TA) | -40°C ~ 125°C (TA) | -40°C ~ 125°C (TA) |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Package / Case | 10-VFDFN Exposed Pad | 10-VFDFN Exposed Pad | 20-VFQFN Exposed Pad | 10-VFDFN Exposed Pad | 10-VFDFN Exposed Pad | 10-VFDFN Exposed Pad | 10-VFDFN Exposed Pad | 10-VFDFN Exposed Pad | 10-VFDFN Exposed Pad |
| Supplier Device Package | 10-DFN (3x3) | 10-DFN (3x3) | 20-QFN (4x4) | 10-DFN (3x3) | 10-DFN (3x3) | 10-DFN (3x3) | 10-DFN (3x3) | 10-DFN (3x3) | 10-DFN (3x3) |
