C8051F353

Overview

The C8051F353 is an 8-bit mixed-signal microcontroller from Silicon Labs, featuring a high-speed CIP-51 core operating at up to 50 MHz. It integrates 8 KB of in-system programmable Flash memory and 768 bytes of RAM. The device includes a 24-bit sigma-delta ADC with an 8-channel multiplexer and programmable gain amplifier, alongside two 8-bit current-output DACs. Digital peripherals consist of four 16-bit timers, a PCA with three capture/compare modules, enhanced UART, SMBus, and SPI interfaces. It operates on a 2.7 V to 3.6 V supply within a -40°C to +85°C temperature range.

Feature Summary

• High-performance pipelined 8051 architecture executing most instructions in one or two system clocks for up to 50 MIPS throughput.
• Integrated 24-bit sigma-delta ADC subsystem supporting up to eight input channels with a programmable gain stage of up to 128 times.
• On-chip debug circuitry enabling full-speed, non-intrusive in-system debugging without requiring external emulation hardware.
• Flexible digital I/O with a programmable crossbar decoder allowing peripheral pin configuration and 5 V tolerance.

Applications

• Analog-intensive data acquisition systems
• Precision sensor signal conditioning
• Industrial control applications
• Portable instrumentation

Procurement Notes

Verify the specific package variant required, as the C8051F35x family is available in both 28-pin MLP and 32-pin LQFP configurations. Confirm that the selected part number corresponds to the 24-bit ADC specification rather than the 16-bit variant found in other members of the series. Ensure development tools support the C2 interface for programming and debugging.

Selection Notes

Select this component when high-resolution analog conversion is critical, specifically requiring the 24-bit ADC capability unique to the F353 within its sub-series. Consider the 50 MHz processing speed for complex real-time algorithms. Evaluate power consumption requirements against the typical stop mode current specifications if battery operation is intended.

Part Context

This device belongs to the C8051F35x family of analog-intensive microcontrollers. It shares the same core architecture and digital peripherals with the C8051F350, F351, and F352, but distinguishes itself through the inclusion of the higher-resolution 24-bit ADC subsystem. This places it above the standard 16-bit ADC variants in terms of precision capabilities while maintaining compatibility with the broader C8051F ecosystem.

Replacement Considerations

The C8051F351 is a direct functional substitute within the same family, differing primarily in ADC resolution (16-bit vs 24-bit). Verify that the application does not strictly require the 24-bit precision provided by the F353 before substituting with lower-resolution variants like the F350 or F352.

FAQ

What is the maximum sampling rate of the ADC?

The ADC supports programmable conversion rates up to 1 ksps.

Does the device support in-circuit reprogramming?

Yes, the 8 KB Flash memory can be reprogrammed in-circuit in 512-byte sectors, allowing for field upgrades.

How many digital I/O pins are available?

The device provides seventeen digital I/O pins, all of which are 5 V tolerant.