C8051F126-GQR - 50MHz 8051 MCU, 128KB Flash, 100-TQFP | Silicon Labs
MPN: C8051F126-GQR ✓ نشطC8051F126-GQR نظرة عامة
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.
بدائل مباشرة لـ C8051F126-GQR — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
C8051F124-GQR
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
C8051F125-GQR
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
C8051F127-GQR
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
C8051F130-GQR
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
C8051F131-GQR
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
C8051F126-GQR الحدود القصوى والخصائص الكهربائية
| Core | 8051 (CIP) |
| Core Width | 8-bit |
| أقصى تردد للساعة | 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 |
| درجة حرارة التشغيل | -40 C to +85 C |
| العلبة | 100-TQFP (14x14 mm) |
| نوع التركيب | Surface Mount |
| Series | C8051F12x |
| حالة RoHS | Compliant |
تكوين أطراف C8051F126-GQR
| دبوس 1 | P1.0 — Port 1 bit 0 (digital I/O) |
| دبوس 2 | P1.1 — Port 1 bit 1 (digital I/O) |
| دبوس 3 | P1.2 — Port 1 bit 2 (digital I/O) |
| دبوس 4 | P1.3 — Port 1 bit 3 (digital I/O) |
| دبوس 5 | P1.4 — Port 1 bit 4 (digital I/O) |
| دبوس 6 | P1.5 — Port 1 bit 5 (digital I/O) |
| دبوس 7 | P1.6 — Port 1 bit 6 (digital I/O) |
| دبوس 8 | P1.7 — Port 1 bit 7 (digital I/O) |
| دبوس 9 | P2.0 — Port 2 bit 0 (digital I/O) |
| دبوس 10 | P2.1 — Port 2 bit 1 (digital I/O) |
| دبوس 11 | P2.2 — Port 2 bit 2 (digital I/O) |
| دبوس 12 | P2.3 — Port 2 bit 3 (digital I/O) |
| دبوس 13 | P2.4 — Port 2 bit 4 (digital I/O) |
| دبوس 14 | P2.5 — Port 2 bit 5 (digital I/O) |
| دبوس 15 | P2.6 — Port 2 bit 6 (digital I/O) |
| دبوس 16 | P2.7 — Port 2 bit 7 (digital I/O) |
| دبوس 17 | P3.0 — Port 3 bit 0 (digital I/O) |
| دبوس 18 | P3.1 — Port 3 bit 1 (digital I/O) |
| دبوس 19 | P3.2 — Port 3 bit 2 (digital I/O / INT0) |
| دبوس 20 | P3.3 — Port 3 bit 3 (digital I/O / INT1) |
| دبوس 21 | P3.4 — Port 3 bit 4 (digital I/O / T0) |
| دبوس 22 | P3.5 — Port 3 bit 5 (digital I/O / T1) |
| دبوس 23 | P3.6 — Port 3 bit 6 (digital I/O) |
| دبوس 24 | P3.7 — Port 3 bit 7 (digital I/O) |
| دبوس 25 | P4.0 — Port 4 bit 0 (digital I/O) |
| دبوس 26 | P4.1 — Port 4 bit 1 (digital I/O) |
| دبوس 27 | P4.2 — Port 4 bit 2 (digital I/O) |
| دبوس 28 | P4.3 — Port 4 bit 3 (digital I/O) |
| دبوس 29 | P4.4 — Port 4 bit 4 (digital I/O) |
| دبوس 30 | P4.5 — Port 4 bit 5 (digital I/O) |
| دبوس 31 | P4.6 — Port 4 bit 6 (digital I/O) |
| دبوس 32 | P4.7 — Port 4 bit 7 (digital I/O) |
| دبوس 33 | P5.0 — Port 5 bit 0 (analog input AIN0) |
| دبوس 34 | P5.1 — Port 5 bit 1 (analog input AIN1) |
| دبوس 35 | P5.2 — Port 5 bit 2 (analog input AIN2) |
| دبوس 36 | P5.3 — Port 5 bit 3 (analog input AIN3) |
| دبوس 37 | P5.4 — Port 5 bit 4 (analog input AIN4) |
| دبوس 38 | P5.5 — Port 5 bit 5 (analog input AIN5) |
| دبوس 39 | P5.6 — Port 5 bit 6 (analog input AIN6) |
| دبوس 40 | P5.7 — Port 5 bit 7 (analog input AIN7) |
| دبوس 41 | P6.0 — Port 6 bit 0 (digital I/O) |
| دبوس 42 | P6.1 — Port 6 bit 1 (digital I/O) |
| دبوس 43 | P6.2 — Port 6 bit 2 (digital I/O) |
| دبوس 44 | P6.3 — Port 6 bit 3 (digital I/O) |
| دبوس 45 | P6.4 — Port 6 bit 4 (digital I/O) |
| دبوس 46 | P6.5 — Port 6 bit 5 (digital I/O) |
| دبوس 47 | P6.6 — Port 6 bit 6 (digital I/O) |
| دبوس 48 | P6.7 — Port 6 bit 7 (digital I/O) |
| دبوس 49 | P7.0 — Port 7 bit 0 (digital I/O) |
| دبوس 50 | P7.1 — Port 7 bit 1 (digital I/O) |
| دبوس 51 | P7.2 — Port 7 bit 2 (digital I/O) |
| دبوس 52 | P7.3 — Port 7 bit 3 (digital I/O) |
| دبوس 53 | P7.4 — Port 7 bit 4 (digital I/O) |
| دبوس 54 | P7.5 — Port 7 bit 5 (digital I/O) |
| دبوس 55 | P7.6 — Port 7 bit 6 (digital I/O) |
| دبوس 56 | P7.7 — Port 7 bit 7 (digital I/O) |
| دبوس 57 | DAC0 — DAC0 analog output |
| دبوس 58 | DAC1 — DAC1 analog output |
| دبوس 59 | CP0+ — Comparator 0 positive input |
| دبوس 60 | CP0- — Comparator 0 negative input |
| دبوس 61 | CP1+ — Comparator 1 positive input |
| دبوس 62 | CP1- — Comparator 1 negative input |
| دبوس 63 | VREF — Voltage reference |
| دبوس 64 | AGND — Analog ground |
| دبوس 65 | AV+ — Analog supply |
| دبوس 66 | XTAL1 — Crystal oscillator input |
| دبوس 67 | XTAL2 — Crystal oscillator output |
| دبوس 68 | RST — Reset (active low) |
| دبوس 69 | TCK — JTAG Test Clock |
| دبوس 70 | TMS — JTAG Test Mode Select |
| دبوس 71 | TDI — JTAG Test Data In |
| دبوس 72 | TDO — JTAG Test Data Out |
| دبوس 73 | P0.0 — Port 0 bit 0 (digital I/O) |
| دبوس 74 | P0.1 — Port 0 bit 1 (digital I/O) |
| دبوس 75 | P0.2 — Port 0 bit 2 (digital I/O) |
| دبوس 76 | P0.3 — Port 0 bit 3 (digital I/O) |
| دبوس 77 | P0.4 — Port 0 bit 4 (digital I/O) |
| دبوس 78 | P0.5 — Port 0 bit 5 (digital I/O) |
| دبوس 79 | P0.6 — Port 0 bit 6 (digital I/O) |
| دبوس 80 | P0.7 — Port 0 bit 7 (digital I/O) |
| دبوس 81 | SDA — I2C data |
| دبوس 82 | SCL — I2C clock |
| دبوس 83 | MOSI — SPI Master Out / Slave In |
| دبوس 84 | MISO — SPI Master In / Slave Out |
| دبوس 85 | SCK — SPI clock |
| دبوس 86 | NSS — SPI slave select |
| دبوس 87 | TX0 — UART0 transmit |
| دبوس 88 | RX0 — UART0 receive |
| دبوس 89 | TX1 — UART1 transmit |
| دبوس 90 | RX1 — UART1 receive |
| دبوس 91 | DGND — Digital ground |
| دبوس 92 | VDD — Digital supply |
| دبوس 93 | NC — Not connected (per datasheet) |
| دبوس 94 | NC — Not connected (per datasheet) |
| دبوس 95 | NC — Not connected (per datasheet) |
| دبوس 96 | NC — Not connected (per datasheet) |
| دبوس 97 | NC — Not connected (per datasheet) |
| دبوس 98 | NC — Not connected (per datasheet) |
| دبوس 99 | NC — Not connected (per datasheet) |
| دبوس 100 | NC — Not connected (per datasheet) |
التطبيقات النموذجية
C8051F126-GQR مناسب لـ 6 التطبيقs: 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.
موصى به
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.
موصى به
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.
موصى به
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.
موصى به
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.
موصى به
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.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ C8051F126-GQR — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | 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 |
أبرز الفروقات
- Highest flash density in the same TQFP-100 footprint (مقابلC8051F124-GQR)
- Higher ADC resolution than the same family (مقابلC8051F125-GQR)
- Higher ADC resolution than the same family (مقابلC8051F127-GQR)
ملاحظات التصميم
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.
معلومات الامتثال
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.
