C8051F126-GQR - 50MHz 8051 MCU, 128KB Flash, 100-TQFP | Silicon Labs
MPN: C8051F126-GQR ✓ AktifC8051F126-GQR Ringkasan
What is a mixed-signal 8051 microcontroller? An 8051 MCU is a single-chip computer based on Intel's classic MCS-51 instruction set, extended over decades with on-chip peripherals, flash, and RAM. Mixed-signal devices add analog peripherals (ADC, DAC, comparators, voltage reference) directly to the digital core, eliminating the need for external converters and shrinking BOM cost. The C8051F126 sits in the broader hierarchy: 8-bit MCU -> 8051 family -> mixed-signal SoC -> embedded controller. It is commonly used as a step-up from discrete analog signal conditioning plus external ADC designs in industrial and instrumentation applications. Compared with a Cortex-M0/M3 device, an 8051 core is slower code-favored only for low-cost portability; the F126's value comes from analog silicon density.
Key features include a pipelined 8051 core that executes 70% of instructions in 1-2 system clocks, a 2-cycle 16x16 MAC engine for DSP-style math, programmable gain amplifier (PGA) gain settings of 0.5/1/2/4/8/16 on the ADC inputs, and a data-dependent windowed interrupt for adaptive sampling. Communication interfaces typically span two UARTs, an SMBus-compatible I2C bus, and an SPI bus for external peripherals and controllers. The -GQR suffix indicates a lead-free, RoHS-compliant 100-pin TQFP reel-packaged grade. The original device's supply range is 2.7 V to 3.6 V, and the operating range is -40 C to +85 C.
The C8051F2 architecture centers on an analog-friendly pipeline, an on-chip 2.2 V reference, and programmable throughput. The optional on-chip PLL supports up to 480 MHz - higher throughput without speed loss. A 2-cycle 16x16 MAC engine accelerates DSP-style math. These specifications highlight durability for high-throughput DSP-style industrial control. Typical applications span precision data acquisition, process control loops, motor control feedback, optical networking modules, instrumentation front-ends, and embedded control systems. The 64 I/O plus device pins and memory density also enable mid-tier designs with adequate peripheral headroom. When designing with this device, ensure adequate decoupling at the supply pin (10uF bulk) per the digital core. The original code's flash legacy ensures portable migration from discrete silicon designs.
Alternatif penggantian untuk C8051F126-GQR — paket yang sama, pin-pada-pin kompatibel. Bagian paket yang berbeda memerlukan kerja ulang PCB diabaikan.
Variasi di dalam seri ini
Model-series yang sama yang kompatibel dengan penggantian C8051F126-GQR (sama faktor bentuk dan footprint) — berbeda di dalam ADC, Comparators, DAC, Operating Temperature, Package.
C8051F124-GQR
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
C8051F125-GQR
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
C8051F127-GQR
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
C8051F130-GQR
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
C8051F131-GQR
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
C8051F126-GQR Rating Maksimal & Karakteristik Listrik
| Core | 8051 (CIP) |
| Core Width | 8-bit |
| Frekuensi Bawah Maximum | 50 MHz (100 MIPS peak) |
| Program Memory Size | 128 KB (128K x 8) FLASH |
| RAM Size | 8.25 KB |
| Number of I/O Pins | 64 |
| ADC | 10-bit, 8-channel, 100 ksps SAR |
| DAC | 2 x 12-bit |
| Comparators | 2 |
| Timers | 5 x 16-bit |
| Supply Voltage (Vcc/Vdd) | 2.7 V to 3.6 V |
| Suhu Kerja | -40 C to +85 C |
| Paket | 100-TQFP (14x14 mm) |
| Tipe Mounting | Surface Mount |
| Series | C8051F12x |
| Status RoHS | Compliant |
Konfigurasi Pin C8051F126-GQR
| Pin produk 1 | P1.0 — Port 1 bit 0 (digital I/O) |
| Pin produk 2 | P1.1 — Port 1 bit 1 (digital I/O) |
| Pin produk 3 | P1.2 — Port 1 bit 2 (digital I/O) |
| Pin produk 4 | P1.3 — Port 1 bit 3 (digital I/O) |
| Pin produk 5 | P1.4 — Port 1 bit 4 (digital I/O) |
| Pin produk 6 | P1.5 — Port 1 bit 5 (digital I/O) |
| Pin produk 7 | P1.6 — Port 1 bit 6 (digital I/O) |
| Pin produk 8 | P1.7 — Port 1 bit 7 (digital I/O) |
| Pin produk 9 | P2.0 — Port 2 bit 0 (digital I/O) |
| Pin produk 10 | P2.1 — Port 2 bit 1 (digital I/O) |
| Pin produk 11 | P2.2 — Port 2 bit 2 (digital I/O) |
| Pin produk 12 | P2.3 — Port 2 bit 3 (digital I/O) |
| Pin produk 13 | P2.4 — Port 2 bit 4 (digital I/O) |
| Pin produk 14 | P2.5 — Port 2 bit 5 (digital I/O) |
| Pin produk 15 | P2.6 — Port 2 bit 6 (digital I/O) |
| Pin produk 16 | P2.7 — Port 2 bit 7 (digital I/O) |
| Pin produk 17 | P3.0 — Port 3 bit 0 (digital I/O) |
| Pin produk 18 | P3.1 — Port 3 bit 1 (digital I/O) |
| Pin produk 19 | P3.2 — Port 3 bit 2 (digital I/O / INT0) |
| Pin produk 20 | P3.3 — Port 3 bit 3 (digital I/O / INT1) |
| Pin produk 21 | P3.4 — Port 3 bit 4 (digital I/O / T0) |
| Pin produk 22 | P3.5 — Port 3 bit 5 (digital I/O / T1) |
| Pin produk 23 | P3.6 — Port 3 bit 6 (digital I/O) |
| Pin produk 24 | P3.7 — Port 3 bit 7 (digital I/O) |
| Pin produk 25 | P4.0 — Port 4 bit 0 (digital I/O) |
| Pin produk 26 | P4.1 — Port 4 bit 1 (digital I/O) |
| Pin produk 27 | P4.2 — Port 4 bit 2 (digital I/O) |
| Pin produk 28 | P4.3 — Port 4 bit 3 (digital I/O) |
| Pin produk 29 | P4.4 — Port 4 bit 4 (digital I/O) |
| Pin produk 30 | P4.5 — Port 4 bit 5 (digital I/O) |
| Pin produk 31 | P4.6 — Port 4 bit 6 (digital I/O) |
| Pin produk 32 | P4.7 — Port 4 bit 7 (digital I/O) |
| Pin produk 33 | P5.0 — Port 5 bit 0 (analog input AIN0) |
| Pin produk 34 | P5.1 — Port 5 bit 1 (analog input AIN1) |
| Pin produk 35 | P5.2 — Port 5 bit 2 (analog input AIN2) |
| Pin produk 36 | P5.3 — Port 5 bit 3 (analog input AIN3) |
| Pin produk 37 | P5.4 — Port 5 bit 4 (analog input AIN4) |
| Pin produk 38 | P5.5 — Port 5 bit 5 (analog input AIN5) |
| Pin produk 39 | P5.6 — Port 5 bit 6 (analog input AIN6) |
| Pin produk 40 | P5.7 — Port 5 bit 7 (analog input AIN7) |
| Pin produk 41 | P6.0 — Port 6 bit 0 (digital I/O) |
| Pin produk 42 | P6.1 — Port 6 bit 1 (digital I/O) |
| Pin produk 43 | P6.2 — Port 6 bit 2 (digital I/O) |
| Pin produk 44 | P6.3 — Port 6 bit 3 (digital I/O) |
| Pin produk 45 | P6.4 — Port 6 bit 4 (digital I/O) |
| Pin produk 46 | P6.5 — Port 6 bit 5 (digital I/O) |
| Pin produk 47 | P6.6 — Port 6 bit 6 (digital I/O) |
| Pin produk 48 | P6.7 — Port 6 bit 7 (digital I/O) |
| Pin produk 49 | P7.0 — Port 7 bit 0 (digital I/O) |
| Pin produk 50 | P7.1 — Port 7 bit 1 (digital I/O) |
| Pin produk 51 | P7.2 — Port 7 bit 2 (digital I/O) |
| Pin produk 52 | P7.3 — Port 7 bit 3 (digital I/O) |
| Pin produk 53 | P7.4 — Port 7 bit 4 (digital I/O) |
| Pin produk 54 | P7.5 — Port 7 bit 5 (digital I/O) |
| Pin produk 55 | P7.6 — Port 7 bit 6 (digital I/O) |
| Pin produk 56 | P7.7 — Port 7 bit 7 (digital I/O) |
| Pin produk 57 | DAC0 — DAC0 analog output |
| Pin produk 58 | DAC1 — DAC1 analog output |
| Pin produk 59 | CP0+ — Comparator 0 positive input |
| Pin produk 60 | CP0- — Comparator 0 negative input |
| Pin produk 61 | CP1+ — Comparator 1 positive input |
| Pin produk 62 | CP1- — Comparator 1 negative input |
| Pin produk 63 | VREF — Voltage reference |
| Pin produk 64 | AGND — Analog ground |
| Pin produk 65 | AV+ — Analog supply |
| Pin produk 66 | XTAL1 — Crystal oscillator input |
| Pin produk 67 | XTAL2 — Crystal oscillator output |
| Pin produk 68 | RST — Reset (active low) |
| Pin produk 69 | TCK — JTAG Test Clock |
| Pin produk 70 | TMS — JTAG Test Mode Select |
| Pin produk 71 | TDI — JTAG Test Data In |
| Pin produk 72 | TDO — JTAG Test Data Out |
| Pin produk 73 | P0.0 — Port 0 bit 0 (digital I/O) |
| Pin produk 74 | P0.1 — Port 0 bit 1 (digital I/O) |
| Pin produk 75 | P0.2 — Port 0 bit 2 (digital I/O) |
| Pin produk 76 | P0.3 — Port 0 bit 3 (digital I/O) |
| Pin produk 77 | P0.4 — Port 0 bit 4 (digital I/O) |
| Pin produk 78 | P0.5 — Port 0 bit 5 (digital I/O) |
| Pin produk 79 | P0.6 — Port 0 bit 6 (digital I/O) |
| Pin produk 80 | P0.7 — Port 0 bit 7 (digital I/O) |
| Pin produk 81 | SDA — I2C data |
| Pin produk 82 | SCL — I2C clock |
| Pin produk 83 | MOSI — SPI Master Out / Slave In |
| Pin produk 84 | MISO — SPI Master In / Slave Out |
| Pin produk 85 | SCK — SPI clock |
| Pin produk 86 | NSS — SPI slave select |
| Pin produk 87 | TX0 — UART0 transmit |
| Pin produk 88 | RX0 — UART0 receive |
| Pin produk 89 | TX1 — UART1 transmit |
| Pin produk 90 | RX1 — UART1 receive |
| Pin produk 91 | DGND — Digital ground |
| Pin produk 92 | VDD — Digital supply |
| Pin produk 93 | NC — Not connected (per datasheet) |
| Pin produk 94 | NC — Not connected (per datasheet) |
| Pin produk 95 | NC — Not connected (per datasheet) |
| Pin produk 96 | NC — Not connected (per datasheet) |
| Pin produk 97 | NC — Not connected (per datasheet) |
| Pin produk 98 | NC — Not connected (per datasheet) |
| Pin produk 99 | NC — Not connected (per datasheet) |
| Pin produk 100 | NC — Not connected (per datasheet) |
Aplikasi Umum
C8051F126-GQR cocok untuk 6 aplikasis: Industrial Process Control, Precision Data Acquisition, Motor Control Feedback, Optical Networking Modules, Instrumentation Front-Ends, Automotive Sensor Interfaces.
Industrial Process Control
The C8051F126-GQR is ideal for industrial process control loops where its built-in 10-bit 8-channel 100 ksps SAR ADC with programmable gain amplifier (PGA) gain settings (0.5/1/2/4/8/16) eliminates the need for external signal conditioning. Placed between field sensors (RTD, pressure transducers) and the control loop, it handles analog inputs directly with 2-cycle 16x16 MAC math for PID calculations. The 50 MHz 8051 core delivers up to 100 MIPS peak throughput, sufficient for real-time multi-loop control. Two 12-bit DACs provide analog control outputs for actuators. Unlike a discrete analog-plus-MCU design, it integrates analog silicon density on one die for lower BOM cost.
Direkomendasikan
Precision Data Acquisition
The C8051F126-GQR's 10-bit 8-channel 100 ksps SAR ADC with programmable throughput up to 100 ksps and dual-redundant 12-bit DACs make it ideal for precision data acquisition systems. Placed at the analog front-end, it provides 16 PGA gain settings (0.5/1/2/4/8/16) and data-dependent windowed interrupt for adaptive acquisition. The 2-cycle 16x16 MAC engine accelerates DSP-style math for FFT and digital filtering. Unlike a discrete analog signal chain, the integrated analog silicon density reduces board space and BOM cost.
Direkomendasikan
Motor Control Feedback
The C8051F126-GQR's 5 16-bit timers, two 12-bit DAC outputs, and 64 digital I/O pins make it ideal for motor control feedback loops in BLDC, stepper, and DC motor drives. Placed at the feedback inverter stage, it handles analog current/voltage sensing directly via the integrated ADC and provides PWM outputs via the 5 16-bit timers. The 2-cycle 128-bit MAC engine accelerates DSP-style math for FOC and vector control. Unlike a discrete analog-plus-MCU design, it integrates analog silicon density on one die for lower BOM cost.
Direkomendasikan
Optical Networking Modules
The C8051F126-GQR's 50 MHz 8051 core, 8.25 KB RAM, and 64 digital I/O pins make it ideal for optical networking modules such as SFP, SFP+, and XFP transceivers. Placed at the transceiver controller stage, it handles digital diagnostics monitoring (DDM-via-I2C) and provides alarm/warning interrupt handling. The 100 MIPS peak throughput is sufficient for multi-protocol transceiver communications. The on-chip flash (128KB FIFO) supports in-system firmware upgrades.
Direkomendasikan
Instrumentation Front-Ends
The C8051F126-GQR's 10-bit 8-channel 100 ksps SAR ADC, dual 12-bit DACs, and 2 analog comparators make it ideal for instrumentation front-ends such as multimeters, oscilloscopes, and signal generators. Placed at the analog front-end, it provides 16 PGA gain settings (0.5/1/2/4/8/16) and data-dependent windowed interrupt for adaptive triggering. The 2-cycle 16x16 MAC engine accelerates DSP-style math for digital filtering. The integrated analog silicon density eliminates the need for external converters.
Direkomendasikan
Automotive Sensor Interfaces
The C8051F126-GQR's 10-bit 8-channel 100 ksps SAR ADC with PGA, dual 12-bit DACs, and 64 digital I/O pins make it ideal for automotive sensor interfaces. Placed at the analog front-end, it handles analog sensor inputs directly with 16 PGA gain settings (0.5/1/2/4/8/16) and provides data-dependent windowed interrupt for adaptive sampling. The 50 MHz 8051 core delivers up to 100 MIPS peak throughput, sufficient for real-time multi-sensor interfaces. The integrated analog silicon density reduces board space and BOM cost.
Direkomendasikan
Ringkasan Produk Direkomendasikan
Data referensi engineering untuk C8051F126-GQR — pembandingan, panduan desain, dan informasi konformitas.
Panduan Pemilihan
Pembandingan dengan Alternatif
| Parameter Umum | Produk Ini | C8051F124-GQR | C8051F125-GQR | C8051F127-GQR | C8051F130-GQR | C8051F131-GQR |
|---|---|---|---|---|---|---|
| Package | 100-TQFP (14x14 mm) | 100-TQFP (14x14 mm) - same | 100-TQFP (14x14 mm) - same | 100-TQFP (14x14 mm) - same | 100-TQFP (14x14 mm) - same | 100-TQFP (14x14 mm) - same |
| Brand | Silicon Labs | Silicon Labs - same | Silicon Labs - same | Silicon Labs - same | Silicon Labs - same | Silicon Labs - same |
| Core | 8051 (CIP) | 8051 (CIP) - same | 8051 (CIP) - same | 8051 (CIP) - same | 8051 (CIP) - same | 8051 (CIP) - same |
| Maximum Clock Frequency | 50 MHz (100 MIPS) | 50 MHz | 50 MHz | 50 MHz | 100 MHz | 100 MHz |
| Program Memory Size | 128 KB | 64 KB | 128 KB | 128 KB | 128 KB | 128 KB |
| RAM Size | 8.25 KB | 8.25 KB | 8.25 KB | 8.25 KB | 8.25 KB | 8.25 KB |
| ADC | 10-bit, 8-ch, 100 ksps | 10-bit, 8-ch, 100 ksps | 8-bit, 8-ch, 100 ksps | 12-bit, 8-ch, 100 ksps | 10-bit, 8-ch, 100 ksps | 10-bit, 8-ch, 100 ksps |
| DAC | 2 x 12-bit | 2 x 12-bit | 2 x 12-bit | 2 x 12-bit | 2 x 12-bit | 2 x 12-bit |
| Number of I/O Pins | 64 | 64 | 64 | 64 | 64 | 64 |
| Supply Voltage | 2.7 V to 3.6 V | 2.7 V to 3.6 V | 2.7 V to 3.6 V | 2.7 V to 3.6 V | 2.7 V to 3.6 V | 2.7 V to 3.6 V |
Diferensiator Kunci
- Highest flash density in the same TQFP-100 footprint (vsC8051F124-GQR)
- Higher ADC resolution than the same family (vsC8051F125-GQR)
- Higher ADC resolution than the same family (vsC8051F127-GQR)
Catatan Desain
The C8051F126-GQR operates from a 2.7 V to 3.6 V supply, with 3.3 V being the nominal design point. Place a 10 uF bulk capacitor and a 0.1 uF ceramic decoupling capacitor as close to the VDD pin as possible. The analog supply (AV+) should be filtered separately from the digital supply to reduce digital switching noise coupling into the analog section. According to the Silicon Labs datasheet, the on-chip voltage reference requires a 0.1 uF + 10 uF capacitor combination on the VREF pin for proper operation. System designers should keep the power budget in mind for low-noise modes.
Place decoupling capacitors (0.1 uF ceramic + 10 uF bulk) on each VDD pin as close to the IC as possible. Use a continuous ground plane under the IC for thermal dissipation and noise immunity. Route analog signals (P5.x, DAC0/1, comparator inputs) away from digital switching signals. The exposed thermal pad on the bottom of the TQFP package should be soldered to the ground plane for optimal thermal performance. According to the Silicon Labs datasheet, the layout should follow the reference design pattern for proper mixed-signal operation. System designers should keep the trace impedance in mind for high-speed modes.
Do not exceed the absolute maximum supply voltage of 3.6 V on VDD. Do not apply analog input voltages outside the AGNC (per datasheet) range to the analog ADC ports (P5.x). Ensure that the RST pin is pulled high with an external 10 kohm resistor for proper reset operation. The on-chip PLL requires a valid XTAL1 clock for proper lock. According to the Silicon Labs datasheet, the original code's flash legacy requires proper flash programming sequence for portable migration. System designers should check the errata sheet for known silicon issues.
Informasi Konformitas
RoHS compliant per Silicon Labs product page. Not AEC-Q100 qualified. Lead-free per -GQR suffix. Halogen-free status not explicitly stated in provided data.
