This document describes the features of a small form factor product launched by Silicon Laboratories in 2005. The product includes UART, FLASH, and SRAM functionalities, and operates on a 24.5 MHz system clock with a high-speed 8051 microcontroller core. It also features built-in analog and digital power, as well as debugging capabilities.
The C8051F335 is a 25 MIPS, 2 kB Flash, 20‑pin mixed‑signal microcontroller featuring analog peripherals such as a programmable comparator, on‑chip debug circuitry, and a high‑speed 8051 core with pipelined instruction execution. It includes digital peripherals like 17 port I/O, hardware SMBus (I2C‑compatible), SPI, UART, and multiple 16‑bit timers.
The device operates from 2.7 V to 3.6 V, with typical active current of 6.4 mA at 25 MHz and a stop‑mode current below 0.1 pA. It is supplied in a lead‑free 20‑pin QFN package and its electrical specifications are detailed in the selected specifications section.
| Supply Voltage | 2.7 to 3.6 V |
|---|---|
| Typical Operating Current | 6.4 mA at 25 MHz |
| Stop‑Mode Current | <0.1 pA |
| Temperature Range | ‑40 to +85 °C |
| Flash Memory | 2 kB |
| Data RAM | 768 bytes |
| I/O Pins | 17 port I/O (5 V tolerant) |
| Package Type | 20‑Pin QFN (lead‑free) |
| Core Throughput | Up to 25 MIPS at 25 MHz |
| Internal Oscillators | 24.5 MHz (±2%) and 80 kHz |
The C8051F335 operates from 2.7 V to 3.6 V.
It contains 2 kB of flash memory.
Typical active current is 6.4 mA at a 25 MHz clock.
The device is supplied in a lead‑free 20‑Pin QFN package.