C8051F226 - 25MHz 8KB Mixed-Signal MCU | Silicon Labs
MPN: C8051F226 ✗ End of Life| Qty | Unit Price | Extended |
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| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
C8051F226 Overview
A mixed-signal MCU is a microcontroller that combines a digital processor core with analog and timing functions on one integrated circuit. In the broader semiconductor hierarchy, this C8051 device belongs to the microcontroller class and provides sensing, control, communications, and programmable I/O in a single package. It is positioned between simple 8-bit control devices and higher-performance 32-bit embedded processors.
Verified device features include 8KB of ISP flash, 1.25KB of RAM, 32 I/O lines, an 8-bit ADC with 32 channels and configurable throughput up to 100ksps, two comparators, three 16-bit timers, and a 25MHz maximum clock. The ADC is reported as a 32-channel mixed-signal peripheral, with port I/O configurable as analog inputs. Exact voltage, temperature, package marking, and interface details must be confirmed in the manufacturer datasheet before design release.
The C8051F226 is useful when a compact 8-bit controller needs both digital control and on-chip analog measurement. Its 8051 instruction set and peripheral set suit embedded control, industrial sensing, instrumentation, and communication-oriented embedded products. The 48-TQFP package provides a conventional pin-count-compatible platform for external memory, bus, and peripheral connections where the specific pin functions are confirmed from the datasheet.
A replacement should not be selected from the MPN name alone. Verify the exact package, pinout, memory map, oscillator requirements, ADC characteristics, peripheral assignments, and software compatibility. The provided cross-reference search identifies C8051F005-GQ as a comparison item, but the available evidence does not establish that it is pin-to-pin compatible or a drop-in replacement for C8051F226.
Drop-in alternatives for C8051F226 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
No drop-in alternatives available for this product.
Request AlternativesC8051F226 Maximum Ratings & Electrical Characteristics
| Core Architecture | 8051 8-bit MCU |
| Maximum Clock Frequency | 25 MHz |
| Maximum Performance | 25 MIPS |
| Program Memory | 8KB ISP Flash (8K x 8) |
| RAM | 1.25KB (1.25K x 8) |
| I/O Count | 32 |
| ADC | 8-bit, 32-channel |
| ADC Throughput | Programmable up to 100ksps |
| ADC Inputs | 32 external inputs |
| ADC INL | ±1/2 LSB |
| ADC Missing Codes | No missing codes |
| Comparators | 2 |
| Timers | 3 x 16-bit |
| Package | 48-TQFP (7x7mm) |
| Supply Voltage | 2.7V to 3.6V |
| Mounting Type | Surface Mount |
C8051F226 48-tqfp (7x7mm) Pin Configuration Guide
Pin configuration for C8051F226 (48-tqfp (7x7mm) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for C8051F226.
Refer to the datasheet for full pin configuration.
Typical Applications
C8051F226 is suitable for 6 applications: Industrial Sensor Interface, Programmable Threshold Control, Embedded Data Acquisition, Motor and Actuator Control, Communication Gateway, Instrumentation and Test Equipment.
Industrial Sensor Interface
The C8051F226 is suitable for compact sensor-interface boards that must acquire several analog inputs while retaining digital control. Its 32-channel 8-bit ADC, 32 configurable I/O lines, and 25MHz 8051 core allow a controller to sample, filter, threshold, and report sensor data without requiring a separate analog front end for every channel. The two comparators can support hardware threshold events, while the three 16-bit timers support sampling intervals, debounce timing, or communication timeouts. The key design constraint is that the exact ADC input mapping and electrical limits must be confirmed from the package-specific datasheet.
Recommended
Programmable Threshold Control
The C8051F226 can implement threshold-based monitoring because it combines two comparators with a mixed-signal MCU. Comparator channels can evaluate external analog signals, allowing firmware to respond to setpoints, fault conditions, or process limits without relying only on periodic software polling. The 25MHz core provides headroom for control logic, and the 1.25KB RAM supports buffering and state management in modest embedded applications. Design the input network carefully so signal amplitude, impedance, noise, and comparator reference arrangements remain within the verified electrical limits.
Recommended
Embedded Data Acquisition
The C8051F226 can serve as a small embedded data-acquisition controller when a system needs more than simple digital I/O but does not require a high-memory processor. The 8-bit ADC provides up to 100ksps programmable throughput across 32 channels, while the 8KB flash stores firmware and 1.25KB RAM supports acquisition buffers. Timers can establish periodic conversion or transfer intervals, and the I/O ports provide control for sensors and indicators. A production design should validate acquisition timing, ADC reference quality, input filtering, and memory usage against the exact firmware workload.
Recommended
Motor and Actuator Control
The C8051F226 is applicable to small actuator-control systems that need timer-managed outputs and mixed-signal feedback. Its three 16-bit timers can provide timing references for motor stepping, pulse generation, or periodic control updates, while the comparators can monitor feedback thresholds. The 32 I/O lines allow connection to drivers, switches, and status signals, and the 25MHz core can execute proportional or state-based control logic. Motor systems must add suitable driver circuitry, protection, isolation, and thermal management; the MCU itself is not a high-current motor driver.
Recommended
Communication Gateway
The C8051F226 can be used in small protocol-conversion or gateway equipment when the design requires deterministic timing, local I/O, and embedded analog monitoring. The 8051 core runs at 25MHz, the three 16-bit timers assist with baud-rate and event timing, and the 32 I/O lines support status and control signals. A communications interface such as RS-485 or a low-speed serial transceiver can be added at the board level, with isolation and surge protection designed separately. Firmware, memory, and interrupt requirements should be reviewed before choosing this MCU over a higher-bandwidth platform.
Recommended
Instrumentation and Test Equipment
The C8051F226 is a reasonable fit for compact instrumentation front ends that combine control logic with analog measurement. The 32-channel ADC and two comparators support signal capture and threshold detection, while the three timers organize measurement intervals, debounce events, and display or communication updates. Its 48-TQFP package allows access to a relatively broad pin set for external signal conditioning and interface circuitry. For laboratory or metrology applications, verify calibration behavior, reference stability, analog noise, and operating-temperature requirements because those details are not provided in the verified search data.
Recommended
Recommended Products Summary
Engineering reference data for C8051F226 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product |
|---|---|
| Package | 48-TQFP (7x7mm) |
| Brand | Silicon Labs |
| Core | 8051 8-bit MCU |
| Maximum Clock Frequency | 25 MHz |
| Program Memory | 8KB ISP Flash |
| RAM | 1.25KB |
| ADC | 8-bit, 32-channel, up to 100ksps |
| I/O | 32 lines |
| Supply Voltage | 2.7V to 3.6V |
| Timers | 3 x 16-bit |
| Comparators | 2 |
Key Differentiators
- Integrated mixed-signal peripheral set (vs C8051F005-GQ)
- Dedicated 8-bit ADC throughput (vs C8051F005-GQ)
- Established package identity (vs C8051F005-GQ)
Design Notes
Reserve the C8051F226 analog and digital functions according to the exact package pinout before routing the PCB. The device combines an ADC, comparators, oscillator circuitry, and digital I/O, so analog inputs should be kept away from switching nodes and high-current return paths. Add filtering and protection appropriate to the sensor source. Because a verified pin-by-pin diagram was not supplied, do not finalize routing from generic TQFP drawings.
Do not select a replacement based only on the 25MHz clock rating. A valid substitute must also match the 48-TQFP footprint, power and ground connectivity, reset and oscillator requirements, ADC and comparator functions, timer resources, memory requirements, and firmware expectations. The supplied cross-reference material does not confirm a drop-in replacement, so validate every pin and peripheral behavior before committing to a substitute.
Design the 2.7V to 3.6V supply rail with decoupling and noise margin appropriate to the mixed-signal peripherals. The ADC and comparators can be sensitive to supply and reference variation, so keep analog supply filtering separate from noisy digital activity where the device documentation permits. Validate startup, current consumption, reference settling, and regulator headroom at the highest required operating condition rather than relying on the nominal supply range alone.
Plan acquisition timing around the ADC's reported programmable throughput of up to 100ksps and the selected sample rate. Input settling time, source impedance, sample-and-hold behavior, and anti-alias filtering can materially affect readings. Use the datasheet timing and ADC reference information to establish the actual usable rate; the 100ksps figure is a maximum capability, not a guarantee for every source impedance or accuracy target.
The supplied data does not provide a power dissipation figure, thermal resistance, or operating-temperature limit for C8051F226. Do not estimate production thermal margin from the 25MHz clock alone. Measure or calculate dissipation from the actual supply voltage, active current, I/O loading, and peripheral activity, then confirm the package thermal data and maximum junction temperature in the manufacturer documentation.
Compliance Information
The supplied verified data does not provide a manufacturer compliance declaration for RoHS, REACH, AEC-Q100, lead-free status, halogen-free status, or conflict-minerals status. These fields remain unknown rather than inferred.
