C8051F021-GQR

Overview

The C8051F021-GQR is a mixed-signal microcontroller featuring a high-speed 8051 core operating at up to 25 MHz. It integrates 64 kB of in-system programmable Flash memory and 4352 bytes of internal data RAM. The device includes a 12-bit, 8-channel ADC with 100 ksps throughput, two 12-bit DACs, and two analog comparators. Digital peripherals consist of hardware SMBus, SPI, and dual UART interfaces alongside five 16-bit timers. It operates within a supply voltage range of 2.7 V to 3.6 V and supports -40°C to +85°C temperatures in a TQFP-64 package.

Feature Summary

• Highly integrated system-on-chip solution combining a pipelined 8051 core with extensive analog peripherals.
• Features on-chip JTAG debug circuitry for full-speed, non-intrusive in-circuit debugging without external emulation hardware.
• Includes precision analog components such as a 12-bit SAR ADC, dual 12-bit DACs, and a built-in temperature sensor.
• Supports multiple power-saving modes and contains an internal programmable oscillator for standalone operation.

Applications

• Portable medical equipment
• Weigh scales
• Test equipment
• Fiber optic systems

Procurement Notes

Verify component authenticity through authorized Silicon Labs distributors or certified partners. Confirm the specific GQR suffix indicates the TQFP-64 surface-mount package variant. Check current lifecycle status as this family may be designated Not Recommended for New Designs. Ensure environmental compliance documentation matches project requirements before finalizing procurement orders.

Selection Notes

Select this model when a complete mixed-signal MCU is required with high-resolution analog conversion capabilities. The C8051F021 provides sufficient Flash and RAM for complex control algorithms while maintaining low power consumption. Consider alternative models if higher clock speeds or different I/O counts are necessary. Verify that the 2.7V to 3.6V supply range aligns with the target system's power architecture.

Part Context

This component belongs to the C8051F02x series of highly integrated mixed-signal microcontrollers from Silicon Labs. The series shares a common CIP-51 core architecture but varies in analog peripheral configurations and memory sizes. The C8051F021 specifically targets applications requiring precise analog signal processing alongside robust digital control logic.

Replacement Considerations

Silicon Labs recommends the EFM8BB31F64G-QFN32 as a replacement for this part. This successor offers updated features and improved performance characteristics suitable for modern embedded designs.

FAQ

What is the maximum sampling rate of the ADC?

The 12-bit ADC supports a programmable throughput of up to 100 ksps.

Does the device support in-circuit debugging?

Yes, it includes on-chip JTAG debug circuitry that facilitates full-speed, non-intrusive in-circuit debugging.

How many analog-to-digital converter channels are available?

The C8051F021 features eight external inputs for the 12-bit ADC, which can be configured as single-ended or differential.