C8051F333-GMR

Overview

The C8051F333-GMR is a mixed-signal ISP Flash microcontroller from Silicon Labs, part of the C8051F33x family. It features an 8-bit 8051 core with up to 25 MIPS throughput at a 25 MHz clock speed. The device includes 4 kB of in-system programmable Flash memory and 768 bytes of internal data RAM. Key analog peripherals include a 10-bit ADC (up to 200 ksps) and a comparator. Digital interfaces comprise UART, SMBus, and SPI. It operates on a 2.7 V to 3.6 V supply within a –40 °C to +85 °C temperature range.

Feature Summary

• Integrated on-chip debug circuitry for full-speed, non-intrusive in-system debugging without external emulators.
• High-speed pipelined 8051 architecture executing 70% of instructions in one or two system clocks.
• Programmable digital I/O with a priority crossbar decoder allowing flexible pin assignment.
• Multiple clock sources including precision internal oscillators supporting crystal-less operation.

Applications

• Industrial control systems requiring mixed-signal processing
• Medical diagnostic equipment needing precise analog measurement
• Embedded modems and voice over IP telephones
• Point-of-sale terminals and weigh scales

Procurement Notes

Verify component authenticity through authorized distributors. Confirm RoHS compliance status as specified in the datasheet. Check for 'Not Recommended for New Designs' status which may impact long-term availability. Ensure ESD handling protocols are followed during storage and assembly. Validate package markings against official Silicon Labs documentation.

Selection Notes

Select this model when 4 kB of Flash memory suffices for application firmware. Choose if 17 GPIOs meet interface requirements. Opt for this variant if operating voltage is strictly between 2.7 V and 3.6 V. Consider the QFN-20 package constraints for PCB layout. Evaluate power consumption needs against typical operating current specifications.

Part Context

This component belongs to the C8051F33x series of mixed-signal microcontrollers. It shares architectural similarities with the C8051F39x family but offers specific memory configurations. The device integrates analog and digital peripherals on a single chip, reducing external component count. It is designed for cost-sensitive applications requiring high performance and low power consumption.

Replacement Considerations

The C8051F330, C8051F331, C8051F332, C8051F334, and C8051F335 are pin-compatible members of the same family. Verify Flash size differences: C8051F330/1 have 8 kB, while C8051F334/5 have 2 kB. The C8051F333 specifically provides 4 kB Flash. Ensure peripheral requirements match the selected variant's capabilities.