C8051F126-GQR - 50MHz 8051 MCU, 128KB Flash, 100-TQFP | Silicon Labs
MPN: C8051F126-GQR ✓ Hoạt độngC8051F126-GQR Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho C8051F126-GQR — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với C8051F126-GQR (cùng hình factor và footprint) — khác nhau ở ADC, Comparators, DAC, Operating Temperature, Package.
C8051F124-GQR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
C8051F125-GQR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
C8051F127-GQR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
C8051F130-GQR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
C8051F131-GQR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
C8051F126-GQR Tỷ lệ tối đa & tính chất điện
| Core | 8051 (CIP) |
| Core Width | 8-bit |
| Tần số xung maksimum | 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 |
| Nhiệt độ hoạt động | -40 C to +85 C |
| Hộp | 100-TQFP (14x14 mm) |
| Kiểu lắp đặt | Surface Mount |
| Series | C8051F12x |
| Trạng thái RoHS | Compliant |
Cấu hình chân C8051F126-GQR
| Chân 1 | P1.0 — Port 1 bit 0 (digital I/O) |
| Chân 2 | P1.1 — Port 1 bit 1 (digital I/O) |
| Chân 3 | P1.2 — Port 1 bit 2 (digital I/O) |
| Chân 4 | P1.3 — Port 1 bit 3 (digital I/O) |
| Chân 5 | P1.4 — Port 1 bit 4 (digital I/O) |
| Chân 6 | P1.5 — Port 1 bit 5 (digital I/O) |
| Chân 7 | P1.6 — Port 1 bit 6 (digital I/O) |
| Chân 8 | P1.7 — Port 1 bit 7 (digital I/O) |
| Chân 9 | P2.0 — Port 2 bit 0 (digital I/O) |
| Chân 10 | P2.1 — Port 2 bit 1 (digital I/O) |
| Chân 11 | P2.2 — Port 2 bit 2 (digital I/O) |
| Chân 12 | P2.3 — Port 2 bit 3 (digital I/O) |
| Chân 13 | P2.4 — Port 2 bit 4 (digital I/O) |
| Chân 14 | P2.5 — Port 2 bit 5 (digital I/O) |
| Chân 15 | P2.6 — Port 2 bit 6 (digital I/O) |
| Chân 16 | P2.7 — Port 2 bit 7 (digital I/O) |
| Chân 17 | P3.0 — Port 3 bit 0 (digital I/O) |
| Chân 18 | P3.1 — Port 3 bit 1 (digital I/O) |
| Chân 19 | P3.2 — Port 3 bit 2 (digital I/O / INT0) |
| Chân 20 | P3.3 — Port 3 bit 3 (digital I/O / INT1) |
| Chân 21 | P3.4 — Port 3 bit 4 (digital I/O / T0) |
| Chân 22 | P3.5 — Port 3 bit 5 (digital I/O / T1) |
| Chân 23 | P3.6 — Port 3 bit 6 (digital I/O) |
| Chân 24 | P3.7 — Port 3 bit 7 (digital I/O) |
| Chân 25 | P4.0 — Port 4 bit 0 (digital I/O) |
| Chân 26 | P4.1 — Port 4 bit 1 (digital I/O) |
| Chân 27 | P4.2 — Port 4 bit 2 (digital I/O) |
| Chân 28 | P4.3 — Port 4 bit 3 (digital I/O) |
| Chân 29 | P4.4 — Port 4 bit 4 (digital I/O) |
| Chân 30 | P4.5 — Port 4 bit 5 (digital I/O) |
| Chân 31 | P4.6 — Port 4 bit 6 (digital I/O) |
| Chân 32 | P4.7 — Port 4 bit 7 (digital I/O) |
| Chân 33 | P5.0 — Port 5 bit 0 (analog input AIN0) |
| Chân 34 | P5.1 — Port 5 bit 1 (analog input AIN1) |
| Chân 35 | P5.2 — Port 5 bit 2 (analog input AIN2) |
| Chân 36 | P5.3 — Port 5 bit 3 (analog input AIN3) |
| Chân 37 | P5.4 — Port 5 bit 4 (analog input AIN4) |
| Chân 38 | P5.5 — Port 5 bit 5 (analog input AIN5) |
| Chân 39 | P5.6 — Port 5 bit 6 (analog input AIN6) |
| Chân 40 | P5.7 — Port 5 bit 7 (analog input AIN7) |
| Chân 41 | P6.0 — Port 6 bit 0 (digital I/O) |
| Chân 42 | P6.1 — Port 6 bit 1 (digital I/O) |
| Chân 43 | P6.2 — Port 6 bit 2 (digital I/O) |
| Chân 44 | P6.3 — Port 6 bit 3 (digital I/O) |
| Chân 45 | P6.4 — Port 6 bit 4 (digital I/O) |
| Chân 46 | P6.5 — Port 6 bit 5 (digital I/O) |
| Chân 47 | P6.6 — Port 6 bit 6 (digital I/O) |
| Chân 48 | P6.7 — Port 6 bit 7 (digital I/O) |
| Chân 49 | P7.0 — Port 7 bit 0 (digital I/O) |
| Chân 50 | P7.1 — Port 7 bit 1 (digital I/O) |
| Chân 51 | P7.2 — Port 7 bit 2 (digital I/O) |
| Chân 52 | P7.3 — Port 7 bit 3 (digital I/O) |
| Chân 53 | P7.4 — Port 7 bit 4 (digital I/O) |
| Chân 54 | P7.5 — Port 7 bit 5 (digital I/O) |
| Chân 55 | P7.6 — Port 7 bit 6 (digital I/O) |
| Chân 56 | P7.7 — Port 7 bit 7 (digital I/O) |
| Chân 57 | DAC0 — DAC0 analog output |
| Chân 58 | DAC1 — DAC1 analog output |
| Chân 59 | CP0+ — Comparator 0 positive input |
| Chân 60 | CP0- — Comparator 0 negative input |
| Chân 61 | CP1+ — Comparator 1 positive input |
| Chân 62 | CP1- — Comparator 1 negative input |
| Chân 63 | VREF — Voltage reference |
| Chân 64 | AGND — Analog ground |
| Chân 65 | AV+ — Analog supply |
| Chân 66 | XTAL1 — Crystal oscillator input |
| Chân 67 | XTAL2 — Crystal oscillator output |
| Chân 68 | RST — Reset (active low) |
| Chân 69 | TCK — JTAG Test Clock |
| Chân 70 | TMS — JTAG Test Mode Select |
| Chân 71 | TDI — JTAG Test Data In |
| Chân 72 | TDO — JTAG Test Data Out |
| Chân 73 | P0.0 — Port 0 bit 0 (digital I/O) |
| Chân 74 | P0.1 — Port 0 bit 1 (digital I/O) |
| Chân 75 | P0.2 — Port 0 bit 2 (digital I/O) |
| Chân 76 | P0.3 — Port 0 bit 3 (digital I/O) |
| Chân 77 | P0.4 — Port 0 bit 4 (digital I/O) |
| Chân 78 | P0.5 — Port 0 bit 5 (digital I/O) |
| Chân 79 | P0.6 — Port 0 bit 6 (digital I/O) |
| Chân 80 | P0.7 — Port 0 bit 7 (digital I/O) |
| Chân 81 | SDA — I2C data |
| Chân 82 | SCL — I2C clock |
| Chân 83 | MOSI — SPI Master Out / Slave In |
| Chân 84 | MISO — SPI Master In / Slave Out |
| Chân 85 | SCK — SPI clock |
| Chân 86 | NSS — SPI slave select |
| Chân 87 | TX0 — UART0 transmit |
| Chân 88 | RX0 — UART0 receive |
| Chân 89 | TX1 — UART1 transmit |
| Chân 90 | RX1 — UART1 receive |
| Chân 91 | DGND — Digital ground |
| Chân 92 | VDD — Digital supply |
| Chân 93 | NC — Not connected (per datasheet) |
| Chân 94 | NC — Not connected (per datasheet) |
| Chân 95 | NC — Not connected (per datasheet) |
| Chân 96 | NC — Not connected (per datasheet) |
| Chân 97 | NC — Not connected (per datasheet) |
| Chân 98 | NC — Not connected (per datasheet) |
| Chân 99 | NC — Not connected (per datasheet) |
| Chân 100 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
C8051F126-GQR phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho C8051F126-GQR — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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 |
Bảo phân biệt quan trọng
- 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)
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.
