SAF-XC866-4FRI - 8-Bit 86MHz XC800 MCU, 16KB Flash | Infineon
MPN： SAF-XC866-4FRI ✓ 啟用中SAF-XC866-4FRI 概覽
An 8-bit microcontroller (MCU) is a programmable integrated circuit that combines a CPU, memory, and I/O peripherals on a single die. The XC800 family extends the classic 8051 instruction set architecture with Infineon's peripheral set and on-chip voltage regulation, enabling single-supply operation from a 3.3 V rail. Within the broader semiconductor taxonomy, the SAF-XC866-4FRI sits as: MCU -> microcontroller -> 8-bit microcontroller -> embedded processor -> semiconductor IC.
Key features include a 16 KB Flash program store with in-system programming support, 768 B of RAM for data and stack operations, integrated ADC for mixed-signal sensing, and a 3 V internal voltage regulator that simplifies board-level power design. The PG-TSSOP-38 footprint measures 9.7 mm x 6.4 mm with 0.5 mm pitch and supports industrial-grade operating temperature.
The architecture pairs an 8051-compatible core with the XC800 peripheral set, including a multi-channel 10-bit ADC, capture/compare units (CCU6) for motor control PWM, and on-chip CAN/UART/SPI interfaces depending on the exact derivative. The 86 MHz internal clock is generated by an on-chip PLL from an external crystal or resonator, eliminating the need for an external clock driver.
Typical applications include BLDC and stepper motor control for small appliances, automotive body electronics such as window lift and seat control modules, HVAC fan controllers, sensor signal conditioning nodes, and industrial sensor interfaces where deterministic real-time response is required.
When designing with the SAF-XC866-4FRI, ensure the external crystal or resonator matches the PLL configuration in the Infineon XC866 user manual. Decouple VDD and VDDP pins with 100 nF + 10 uF ceramic capacitors placed within 5 mm of the supply pins to suppress switching transients from the internal regulator.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the standalone Infineon datasheet PDF, helping engineers evaluate sourcing risk and footprint compatibility.
直接替換替代品，適用於 SAF-XC866-4FRI — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： SAF-XC866-4FRI （相同外形與佔位） — 差異在於 Operating Temperature, Package, Core Architecture, Family, RAM.
SAF-XC866-4FRI 3V BE
✅ 直接替換📋 參考替代品（不在目錄中）
SAF-XC866-4FRI BC
✅ 直接替換📋 參考替代品（不在目錄中）
SAF-XC866-2FRI 3V BE
✅ 直接替換📋 參考替代品（不在目錄中）
XC866L-2FRI
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
XC866-4FRA
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
SAF-XC866-4FRI 最大額定值與電氣特性
| Manufacturer | Infineon Technologies |
| Family | XC800 XC8xx |
| Core Architecture | 8051-compatible 8-bit |
| CPU Clock (max) | 86 MHz |
| Program Memory | 16 KB Flash |
| RAM | 768 B |
| Supply Voltage (core) | 3 V |
| 封裝 | PG-TSSOP-38 |
| Pins | 38 |
| 工作溫度 | -40 C to +85 C (industrial) |
| 安裝類型 | Surface Mount |
| Lead-Free / RoHS | Yes (compliant) |
| Terminal Form | Gull Wing |
| Temperature Grade | Industrial |
| Part Status | ACTIVE |
SAF-XC866-4FRI 腳位配置
| 腳位 1 | P1.0 — Port 1.0 / CCU6 output / ADC ch0 |
| 腳位 2 | P1.1 — Port 1.1 / CCU6 output / ADC ch1 |
| 腳位 3 | P1.2 — Port 1.2 / CCU6 output / ADC ch2 |
| 腳位 4 | P1.3 — Port 1.3 / CCU6 output / ADC ch3 |
| 腳位 5 | P1.4 — Port 1.4 / CCU6 output / ADC ch4 |
| 腳位 6 | P1.5 — Port 1.5 / CCU6 output / ADC ch5 |
| 腳位 7 | P1.6 — Port 1.6 / CCU6 output / ADC ch6 |
| 腳位 8 | P1.7 — Port 1.7 / CCU6 output / ADC ch7 |
| 腳位 9 | VDD — 3.3 V core supply input |
| 腳位 10 | VDDP — I/O supply input |
| 腳位 11 | VREF — ADC voltage reference |
| 腳位 12 | GND — Ground |
| 腳位 13 | XTAL1 — Crystal oscillator input |
| 腳位 14 | XTAL2 — Crystal oscillator output |
| 腳位 15 | RESET — Reset input (active low) |
| 腳位 16 | P3.0 — Port 3.0 / UART RXD |
| 腳位 17 | P3.1 — Port 3.1 / UART TXD |
| 腳位 18 | P3.2 — Port 3.2 / INT0 |
| 腳位 19 | P3.3 — Port 3.3 / INT1 / T0 |
| 腳位 20 | P3.4 — Port 3.4 / T1 |
| 腳位 21 | P3.5 — Port 3.5 / T2 |
| 腳位 22 | P0.0 — Port 0.0 / CAN RXD |
| 腳位 23 | P0.1 — Port 0.1 / CAN TXD |
| 腳位 24 | P0.2 — Port 0.2 / SS / SCK |
| 腳位 25 | P0.3 — Port 0.3 / MISO |
| 腳位 26 | P0.4 — Port 0.4 / MOSI |
| 腳位 27 | P0.5 — Port 0.5 |
| 腳位 28 | P0.6 — Port 0.6 |
| 腳位 29 | P0.7 — Port 0.7 |
| 腳位 30 | P2.0 — Port 2.0 / CCU6 output |
| 腳位 31 | P2.1 — Port 2.1 / CCU6 output |
| 腳位 32 | P2.2 — Port 2.2 / CCU6 output |
| 腳位 33 | P2.3 — Port 2.3 / CCU6 output |
| 腳位 34 | P2.4 — Port 2.4 / CCU6 output |
| 腳位 35 | P2.5 — Port 2.5 / CCU6 output |
| 腳位 36 | P2.6 — Port 2.6 / CCU6 output |
| 腳位 37 | P2.7 — Port 2.7 / CCU6 output |
| 腳位 38 | GND — Ground |
典型應用
SAF-XC866-4FRI 適用於 6 應用s: BLDC Motor Control for Small Appliances, Automotive Body Electronics Modules, HVAC Fan and Blower Controllers, Industrial Sensor Signal Conditioning, Stepper Motor Control for Printers and 3D Printers, Smart Home Sensor Hubs.
BLDC Motor Control for Small Appliances
The SAF-XC866-4FRI drives small brushless DC motors in fans, pumps, and appliance compressors where deterministic PWM timing matters. Its CCU6 unit generates complementary 3-phase PWM with dead-time insertion at the 86 MHz system clock, giving 11.6 ns PWM resolution - tight enough for 50 kHz switching without resolution loss. The integrated 10-bit ADC samples phase currents within the PWM cycle for field-oriented control. The PG-TSSOP-38 footprint fits inside 38 mm x 6.4 mm of PCB area, leaving room for the gate driver and three-phase inverter on a compact appliance control board.
推薦
Automotive Body Electronics Modules
Body controllers for window lift, seat adjustment, and lighting benefit from the SAF-XC866-4FRI's 8051 instruction determinism and LIN/CAN-ready peripheral set. The 86 MHz CPU processes LIN frame scheduling in software within 1 ms response budgets, while the 16 KB Flash stores diagnostics, and ramp-up / ramp-down seat profiles. The -40 C to +85 C industrial temperature grade handles cabin-mounted module thermal loads. A PG-TSSOP-38 footprint lets the MCU sit alongside LIN PHYs and relay drivers on a 60 mm x 40 mm PCB typical of door modules.
推薦
HVAC Fan and Blower Controllers
Variable-speed HVAC fans use the SAF-XC866-4FRI to generate triac-firing-angle control or direct PWM for brushless blower motors. The 86 MHz CPU executes a PI speed-control loop in under 100 us using the on-chip capture/compare unit for tachometer feedback. The integrated 3 V regulator removes the need for an external LDO on the 12 V bus, reducing BOM cost. PG-TSSOP-38 packages comfortably within a thermostat-sized control board alongside the temperature sensor interface and triac coupler.
推薦
Industrial Sensor Signal Conditioning
Sensor nodes that digitize analog field signals leverage the SAF-XC866-4FRI's 10-bit ADC and UART/SPI interfaces. The 86 MHz CPU oversamples and averages ADC readings at 1 kHz to push effective resolution beyond 12 bits for strain-gauge and thermocouple chains. The 768 B RAM buffers up to 256 samples for moving-average filters, while the 16 KB Flash hosts the calibration lookup tables. PG-TSSOP-38 fits on a 25 mm x 25 mm industrial transmitter PCB alongside an RS-485 transceiver.
推薦
Stepper Motor Control for Printers and 3D Printers
Stepper drivers in printers and 3D printers use the SAF-XC866-4FRI's CCU6 timer to generate precise step and direction pulses at rates up to 100 kHz without CPU intervention. The 86 MHz clock delivers 86 ns pulse resolution, enabling microstepping at 1/32 steps for smooth motion profiles. The 16 KB Flash stores G-code interpreter firmware, while the 768 B RAM holds the queue of pending motion commands. The PG-TSSOP-38 package mounts easily on a stepper-driver carrier board next to the A4988 or DRV8825 driver IC.
推薦
Smart Home Sensor Hubs
Smart-home gateways and sensor hubs use the SAF-XC866-4FRI as a low-cost edge controller that aggregates inputs from PIR, temperature, and humidity sensors via the integrated ADC and UART. The 86 MHz CPU runs a small RTOS or polled loop to publish sensor frames to a host MCU over SPI at 1 Mbaud. The 16 KB Flash accommodates the device-driver library, while 768 B RAM handles inter-task messages. The PG-TSSOP-38 package fits inside a wall-switch or motion-sensor housing.
推薦
推薦產品摘要
工程參考資料，適用於 SAF-XC866-4FRI — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | SAF-XC866-4FRI 3V BE | SAF-XC866-4FRI BC | SAF-XC866-2FRI 3V BE | XC866L-2FRI | XC866-4FRA |
|---|---|---|---|---|---|---|
| Package | PG-TSSOP-38 | PG-TSSOP-38 - same | PG-TSSOP-38 - same | PG-TSSOP-38 - same | PG-TSSOP-38 - same | PG-TSSOP-38 - same |
| Brand | Infineon | Infineon - same | Infineon - same | Infineon - same | Infineon - same | Infineon - same |
| CPU Clock (max) | 86 MHz | 86 MHz | 86 MHz | 26.6 MHz | 26.6 MHz | 86 MHz |
| Flash Memory | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB |
| RAM | 768 B | 768 B | 768 B | 768 B | 768 B | 768 B |
| Core Voltage | 3 V | 3 V | 3 V | 3 V | 3 V | 3 V |
| Temperature Grade | Industrial -40C to +85C | Industrial | Industrial | Industrial | Industrial | Automotive |
| Lifecycle Status | ACTIVE | ACTIVE | Active (legacy) | ACTIVE | ACTIVE | ACTIVE |
主要差異化特點
- Faster CPU clock vs lower-tier XC866 derivative (對比SAF-XC866-2FRI 3V BE)
- Active catalog version with 3V supply designation (對比SAF-XC866-4FRI BC)
- Integrated 3 V voltage regulator on-chip (對比External LDO discrete design)
設計說明
Decouple the VDD (pin 9) and VDDP (pin 10) pins with a 100 nF X7R ceramic placed within 5 mm, plus a 10 uF tantalum or ceramic bulk capacitor. The internal 3 V regulator requires adequate bulk capacitance to handle load transients when the CPU and ADC switch simultaneously. Estimated: 10 uF bulk cap supports up to 100 mA transient step at 1 us settling.
The XC800 family requires the Infineon DAvE or Keil compiler toolchain - code written for generic 8051 may fail due to the extended SFR map. Always check the Infineon XC866 user manual register definitions before porting code from third-party 8051 examples. The on-chip debug interface needs a dedicated OCDS pinout.
Route the XTAL1 (pin 13) and XTAL2 (pin 14) traces as short, symmetric traces guarded by a ground ring. Place the load capacitors within 2 mm of the crystal pins. Avoid routing digital signal traces under the crystal to minimize crosstalk into the PLL reference.
合規資訊
RoHS and lead-free compliant per Infineon product page. Industrial temperature grade -40C to +85C; for AEC-Q100 automotive use, choose the XC866-4FRA derivative.
