C8051F126-GQR - 50MHz 8051 MCU, 128KB Flash, 100-TQFP | Silicon Labs
N.º da peça: C8051F126-GQR ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $24.5 | $24,50 |
| 10 | $21.8 | $218,00 |
| 100 | $19.2 | $1.920,00 |
| 500 | $17.4 | $8.700,00 |
| 1.000 | $15.6 | $15.600,00 |
C8051F126-GQR Visão geral
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.
Alternativas drop-in para C8051F126-GQR — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
C8051F124-GQR
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
C8051F125-GQR
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
C8051F127-GQR
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
C8051F130-GQR
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
C8051F131-GQR
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
C8051F126-GQR Classificações máximas e características elétricas
| Core | 8051 (CIP) |
| Core Width | 8-bit |
| Frequência máxima de clock | 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 |
| Temperatura de operação | -40 C to +85 C |
| Encapsulamento | 100-TQFP (14x14 mm) |
| Tipo de montagem | Surface Mount |
| Series | C8051F12x |
| Status RoHS | Compliant |
Configuração de pinos do C8051F126-GQR
| Pino 1 | P1.0 — Port 1 bit 0 (digital I/O) |
| Pino 2 | P1.1 — Port 1 bit 1 (digital I/O) |
| Pino 3 | P1.2 — Port 1 bit 2 (digital I/O) |
| Pino 4 | P1.3 — Port 1 bit 3 (digital I/O) |
| Pino 5 | P1.4 — Port 1 bit 4 (digital I/O) |
| Pino 6 | P1.5 — Port 1 bit 5 (digital I/O) |
| Pino 7 | P1.6 — Port 1 bit 6 (digital I/O) |
| Pino 8 | P1.7 — Port 1 bit 7 (digital I/O) |
| Pino 9 | P2.0 — Port 2 bit 0 (digital I/O) |
| Pino 10 | P2.1 — Port 2 bit 1 (digital I/O) |
| Pino 11 | P2.2 — Port 2 bit 2 (digital I/O) |
| Pino 12 | P2.3 — Port 2 bit 3 (digital I/O) |
| Pino 13 | P2.4 — Port 2 bit 4 (digital I/O) |
| Pino 14 | P2.5 — Port 2 bit 5 (digital I/O) |
| Pino 15 | P2.6 — Port 2 bit 6 (digital I/O) |
| Pino 16 | P2.7 — Port 2 bit 7 (digital I/O) |
| Pino 17 | P3.0 — Port 3 bit 0 (digital I/O) |
| Pino 18 | P3.1 — Port 3 bit 1 (digital I/O) |
| Pino 19 | P3.2 — Port 3 bit 2 (digital I/O / INT0) |
| Pino 20 | P3.3 — Port 3 bit 3 (digital I/O / INT1) |
| Pino 21 | P3.4 — Port 3 bit 4 (digital I/O / T0) |
| Pino 22 | P3.5 — Port 3 bit 5 (digital I/O / T1) |
| Pino 23 | P3.6 — Port 3 bit 6 (digital I/O) |
| Pino 24 | P3.7 — Port 3 bit 7 (digital I/O) |
| Pino 25 | P4.0 — Port 4 bit 0 (digital I/O) |
| Pino 26 | P4.1 — Port 4 bit 1 (digital I/O) |
| Pino 27 | P4.2 — Port 4 bit 2 (digital I/O) |
| Pino 28 | P4.3 — Port 4 bit 3 (digital I/O) |
| Pino 29 | P4.4 — Port 4 bit 4 (digital I/O) |
| Pino 30 | P4.5 — Port 4 bit 5 (digital I/O) |
| Pino 31 | P4.6 — Port 4 bit 6 (digital I/O) |
| Pino 32 | P4.7 — Port 4 bit 7 (digital I/O) |
| Pino 33 | P5.0 — Port 5 bit 0 (analog input AIN0) |
| Pino 34 | P5.1 — Port 5 bit 1 (analog input AIN1) |
| Pino 35 | P5.2 — Port 5 bit 2 (analog input AIN2) |
| Pino 36 | P5.3 — Port 5 bit 3 (analog input AIN3) |
| Pino 37 | P5.4 — Port 5 bit 4 (analog input AIN4) |
| Pino 38 | P5.5 — Port 5 bit 5 (analog input AIN5) |
| Pino 39 | P5.6 — Port 5 bit 6 (analog input AIN6) |
| Pino 40 | P5.7 — Port 5 bit 7 (analog input AIN7) |
| Pino 41 | P6.0 — Port 6 bit 0 (digital I/O) |
| Pino 42 | P6.1 — Port 6 bit 1 (digital I/O) |
| Pino 43 | P6.2 — Port 6 bit 2 (digital I/O) |
| Pino 44 | P6.3 — Port 6 bit 3 (digital I/O) |
| Pino 45 | P6.4 — Port 6 bit 4 (digital I/O) |
| Pino 46 | P6.5 — Port 6 bit 5 (digital I/O) |
| Pino 47 | P6.6 — Port 6 bit 6 (digital I/O) |
| Pino 48 | P6.7 — Port 6 bit 7 (digital I/O) |
| Pino 49 | P7.0 — Port 7 bit 0 (digital I/O) |
| Pino 50 | P7.1 — Port 7 bit 1 (digital I/O) |
| Pino 51 | P7.2 — Port 7 bit 2 (digital I/O) |
| Pino 52 | P7.3 — Port 7 bit 3 (digital I/O) |
| Pino 53 | P7.4 — Port 7 bit 4 (digital I/O) |
| Pino 54 | P7.5 — Port 7 bit 5 (digital I/O) |
| Pino 55 | P7.6 — Port 7 bit 6 (digital I/O) |
| Pino 56 | P7.7 — Port 7 bit 7 (digital I/O) |
| Pino 57 | DAC0 — DAC0 analog output |
| Pino 58 | DAC1 — DAC1 analog output |
| Pino 59 | CP0+ — Comparator 0 positive input |
| Pino 60 | CP0- — Comparator 0 negative input |
| Pino 61 | CP1+ — Comparator 1 positive input |
| Pino 62 | CP1- — Comparator 1 negative input |
| Pino 63 | VREF — Voltage reference |
| Pino 64 | AGND — Analog ground |
| Pino 65 | AV+ — Analog supply |
| Pino 66 | XTAL1 — Crystal oscillator input |
| Pino 67 | XTAL2 — Crystal oscillator output |
| Pino 68 | RST — Reset (active low) |
| Pino 69 | TCK — JTAG Test Clock |
| Pino 70 | TMS — JTAG Test Mode Select |
| Pino 71 | TDI — JTAG Test Data In |
| Pino 72 | TDO — JTAG Test Data Out |
| Pino 73 | P0.0 — Port 0 bit 0 (digital I/O) |
| Pino 74 | P0.1 — Port 0 bit 1 (digital I/O) |
| Pino 75 | P0.2 — Port 0 bit 2 (digital I/O) |
| Pino 76 | P0.3 — Port 0 bit 3 (digital I/O) |
| Pino 77 | P0.4 — Port 0 bit 4 (digital I/O) |
| Pino 78 | P0.5 — Port 0 bit 5 (digital I/O) |
| Pino 79 | P0.6 — Port 0 bit 6 (digital I/O) |
| Pino 80 | P0.7 — Port 0 bit 7 (digital I/O) |
| Pino 81 | SDA — I2C data |
| Pino 82 | SCL — I2C clock |
| Pino 83 | MOSI — SPI Master Out / Slave In |
| Pino 84 | MISO — SPI Master In / Slave Out |
| Pino 85 | SCK — SPI clock |
| Pino 86 | NSS — SPI slave select |
| Pino 87 | TX0 — UART0 transmit |
| Pino 88 | RX0 — UART0 receive |
| Pino 89 | TX1 — UART1 transmit |
| Pino 90 | RX1 — UART1 receive |
| Pino 91 | DGND — Digital ground |
| Pino 92 | VDD — Digital supply |
| Pino 93 | NC — Not connected (per datasheet) |
| Pino 94 | NC — Not connected (per datasheet) |
| Pino 95 | NC — Not connected (per datasheet) |
| Pino 96 | NC — Not connected (per datasheet) |
| Pino 97 | NC — Not connected (per datasheet) |
| Pino 98 | NC — Not connected (per datasheet) |
| Pino 99 | NC — Not connected (per datasheet) |
| Pino 100 | NC — Not connected (per datasheet) |
Aplicações típicas
C8051F126-GQR é adequado para 6 aplicaçãos: 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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para C8051F126-GQR — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | 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 |
Principais diferenciais
- Highest flash density in the same TQFP-100 footprint (vs C8051F124-GQR)
- Higher ADC resolution than the same family (vs C8051F125-GQR)
- Higher ADC resolution than the same family (vs C8051F127-GQR)
Notas de projeto
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.
Informações de conformidade
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.
