C8051F126-GQR

Overview

The C8051F126-GQR is an 8-bit microcontroller from the Silicon Labs C8051F12x series, featuring a pipelined CIP-51 core with 50 MIPS throughput. It includes 128 kB of in-system programmable Flash memory and 8448 bytes of internal data RAM. The device integrates a 10-bit SAR ADC with up to 8 external inputs and a programmable amplifier, alongside two 12-bit DACs. Digital peripherals include hardware SMBus, SPI, and dual UARTs. It operates within a voltage range of 2.7 V to 3.6 V and supports on-chip JTAG debug.

Feature Summary

• Features a high-speed pipelined 8051 core executing 70% of instructions in one or two system clocks.
• Integrates analog peripherals including a 10-bit ADC with programmable gain and two synchronized 12-bit DACs.
• Provides comprehensive digital connectivity via hardware SMBus, SPI, and concurrent dual UART interfaces.
• Supports full-speed non-intrusive in-circuit debugging through on-chip JTAG circuitry.

Applications

• Embedded systems requiring precise analog signal acquisition and waveform generation
• Industrial control applications utilizing hardware serial communication protocols
• Data logging devices leveraging in-system programmable Flash for code updates

Procurement Notes

Verify component authenticity by cross-referencing the manufacturer part number against official Silicon Labs documentation. Confirm package type matches the TQFP specification required for your design. Ensure compliance with RoHS standards if applicable to your manufacturing process. Check for any specific environmental certifications required by your regional regulations before finalizing procurement.

Selection Notes

Select this component when a fully integrated 8-bit MCU solution is needed with significant onboard Flash and mixed-signal capabilities. It is suitable for designs prioritizing cost-effective analog performance without external components. Consider the 50 MIPS processing speed adequate for moderate complexity control loops. Verify that the available I/O count meets the interface requirements of the target application.

Part Context

This microcontroller belongs to the C8051F12x family, which shares architectural similarities with the C8051F13x series but differs in analog peripheral configurations. The F12x series specifically includes 12-bit DACs and a 10-bit ADC, whereas other variants may offer different converter resolutions or counts. This family utilizes the same CIP-51 core and memory organization, allowing for potential software portability across compatible devices within the broader C8051F1xx lineup.

Replacement Considerations

Public confirmed substitute part numbers: C8051F120-GQR, C8051F121-GQR, C8051F122-GQR, C8051F123-GQR, C8051F124-GQR, C8051F125-GQR, C8051F127-GQR.