PIC18LF2539-I/SO - 8-Bit MCU, 24KB Flash, 40MHz, 28-SOIC
MPN: PIC18LF2539-I/SO ✓ Hoạt độngPIC18LF2539-I/SO Tóm tắt
The PIC18 is an 8-bit modified Harvard RISC microcontroller family — a category of MCU that executes instructions in a single clock cycle (or four clock cycles for branches/table reads), features separate program and data buses for simultaneous instruction fetch plus operand access, and includes a hardware multiplier for fast arithmetic. Within the broader taxonomy: microcontroller -> 8-bit MCU -> PIC18 family -> PIC18F/LF25xx motor-control sub-family -> power-management and motion-control applications. The LF family targets low-power and battery-friendly designs where 5 V system rails are common.
Key features of the PIC18LF2539-I/SO include 24KB of self-programmable Flash memory, 256 bytes of EEPROM, an integrated 10-bit ADC, Capture/Compare/PWM (CCP) and Enhanced CCP modules for motor control, a USART, MSSP (SPI/I2C), and a 34-channel I/O structure with individual direction control. The 40 MHz clock yields up to 10 MIPS instruction throughput, suitable for closed-loop motor control loops in real time. The integrated motor-control kernel provides dedicated PWM, quadrature encoder interface, and Power Factor Correction (PFC) primitives specifically tuned for single-phase induction motors.
The 28-SOIC wide-body (0.295 in / 7.50 mm) package is pin-compatible with the PIC18F2539-I/SO (5 V F-variant) and accepts standard surface-mount reflow profiles. Internal oscillator options reduce BOM cost by eliminating an external crystal in non-precision applications, and the Flash memory supports in-circuit serial programming (ICSP) for field updates. An integrated Power-On Reset (POR) and Brown-Out Reset (BOR) simplify power-rail sequencing.
Typical applications include single-phase induction motor drives (washing machines, fans, pumps, small kitchen appliances), industrial control panels, white-goods inverters, sensor signal conditioning with on-chip ADC, and consumer motor-driven products. The combination of 40 MHz throughput and a dedicated motor-control kernel makes this MCU particularly well suited to field-oriented control (FOC) for single-phase BLDC/induction motors where deterministic interrupt latency is critical.
A common design consideration: choosing the LF (4.2 V–5.5 V) variant versus the F (4.2 V–5.5 V in F2; 2.0 V–5.5 V in K-series) variant depends on whether your system runs from a regulated 5 V rail or from a wider input range. Designers should verify the brown-out voltage threshold and ADC reference topology in the manufacturer datasheet when migrating between sub-families. Note that the SOIC package dissipates less power than the SPDIP package — verify thermal rise during sustained high-I/O switching.
This page synthesises distributor pricing from DigiKey and Octopart, Microchip cross-references, and practical design notes not consolidated in any single source, giving engineers a single point of decision.
Bộ thay thế dễ dàng lắp đặt cho PIC18LF2539-I/SO — 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 PIC18LF2539-I/SO (cùng hình factor và footprint) — khác nhau ở ADC, I/O Pins, Package, Core Architecture, Operating Temperature.
PIC18F2539-I/SO
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18LF2539T-I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF2539-I/SP
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF252-I/SO
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC18LF2455-I/SO
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC18LF2539-I/SO Tỷ lệ tối đa & tính chất điện
| Core | PIC18 (8-bit modified Harvard RISC) |
| Program Memory | 24 KB Flash |
| RAM | 1408 bytes |
| EEPROM | 256 bytes |
| Maximum CPU Frequency | 40 MHz (10 MIPS) |
| Supply Voltage Range | 4.2 V to 5.5 V |
| I/O Pins | 34 (in 28-pin package, multiplexed) |
| ADC | 10-bit |
| Hộp | 28-SOIC (0.295 in / 7.50 mm wide) |
| Kiểu lắp đặt | Surface Mount |
| Nhiệt độ hoạt động | -40 °C to +85 °C (Industrial) |
| ROM Type | Flash (self-programmable) |
| Peripherals | CCP/ECCP, USART, MSSP (SPI/I2C), motor-control kernel |
| Cấp MSL | 1 (per JEDEC J-STD-020, no dry-pack required) |
| Trạng thái RoHS | Compliant (lead-free) |
Cấu hình chân PIC18LF2539-I/SO
| Chân 1 | MCLR/Vpp — Master Clear (reset, active low) / ICSP programming voltage input |
| Chân 2 | AN0/C12IN0- — Analog input 0 / comparator negative input |
| Chân 3 | AN1/C12IN1- — Analog input 1 / comparator negative input |
| Chân 4 | AN2/C12IN2-/CVref — Analog input 2 / comparator input / CVref output |
| Chân 5 | AN3/C12IN3+ — Analog input 3 / comparator positive input |
| Chân 6 | AN4/T0CKI — Analog input 4 / Timer0 clock input |
| Chân 7 | AN5/SS — Analog input 5 / SPI slave select |
| Chân 8 | Vss — Ground reference |
| Chân 9 | OSC1/CLKIN — Crystal oscillator input / external clock input |
| Chân 10 | OSC2/CLKOUT — Crystal oscillator output / clock output |
| Chân 11 | RC0/T1CKI — Digital I/O / Timer1 clock input |
| Chân 12 | RC1/CCP2 — Digital I/O / Capture-Compare-PWM 2 output |
| Chân 13 | RC2/ECCP1/P1A — Digital I/O / Enhanced CCP1 output / PWM 1A |
| Chân 14 | RC3/SCK/SCL — Digital I/O / SPI clock / I2C clock |
| Chân 15 | RC4/SDI/SDA — Digital I/O / SPI data in / I2C data |
| Chân 16 | RC5/SDO — Digital I/O / SPI data out |
| Chân 17 | RC6/TX/CK — Digital I/O / USART async transmit / clock |
| Chân 18 | RC7/RX/DT — Digital I/O / USART async receive / data |
| Chân 19 | Vss — Ground reference |
| Chân 20 | VDD — Positive supply voltage (4.2 V to 5.5 V) |
| Chân 21 | RB0/INT — Digital I/O / external interrupt |
| Chân 22 | RB1 — Digital I/O |
| Chân 23 | RB2 — Digital I/O |
| Chân 24 | RB3/PGM — Digital I/O / ICSP LVP enable |
| Chân 25 | RB4 — Digital I/O |
| Chân 26 | RB5/PGM — Digital I/O / ICSP LVP enable |
| Chân 27 | RB6/PGC — Digital I/O / ICSP clock |
| Chân 28 | RB7/PGD — Digital I/O / ICSP data |
Ứng dụng tiêu biểu
PIC18LF2539-I/SO phù hợp cho 6 Áp dụngs: Single-Phase Induction Motor Drive, Industrial Fan and Pump Control, White-Goods Inverter Boards, Sensor Signal Conditioning Hub, Consumer Motor-Driven Products, HVAC Blower Control.
Single-Phase Induction Motor Drive
The PIC18LF2539-I/SO is purpose-built by Microchip for single-phase induction motor control in white goods. At 40 MHz / 10 MIPS the core sustains deterministic FOC and PFC loops inside microsecond budgets, while the integrated motor-control kernel offloads PWM generation, quadrature encoder capture, and frequency-to-voltage conversion from software. With 24KB Flash and 1408B RAM, the firmware can host lookup tables, PI controllers, and IEC 60730 class-B safety routines in one chip. The 28-SOIC footprint mates cleanly with TC427 gate drivers and ACPL-P314 opto-isolated IGBT drivers for 200 W to 1 kW washing-machine, range-hood, or pump inverters.
Được đề xuất
Industrial Fan and Pump Control
The PIC18LF2539-I/SO's PWM, Enhanced CCP and 10-bit ADC make it ideal for variable-speed industrial fans and pumps. Real-time closed-loop RPM control via quadrature encoder interrupts runs at 40 MHz with sub-microsecond jitter; on-chip Flash supports in-circuit firmware updates for field service. Industrial -40 °C to +85 °C temperature range matches HVAC, refrigeration, and fluid-handling applications. The 28-SOIC footprint drops onto legacy PIC16 designs with minor firmware rework, while keeping the 4.2-5.5 V supply requirement compatible with regulated 5 V industrial bus rails.
Được đề xuất
White-Goods Inverter Boards
Washing machines, dishwashers, and refrigerator inverter boards rely on the PIC18LF2539-I/SO to combine motor control and user-interface tasks on one MCU. The 24KB Flash / 1408B RAM footprint is sufficient for IEC 60730 class B safety diagnostics, sensorless vector control, and keypad scan logic without external EEPROM. The 10 MIPS core handles triac zero-crossing, BLDC commutation, and temperature monitoring in real time, while the integrated 10-bit ADC simplifies current-sense and tachometer feedback. Lead-free 28-SOIC packaging survives SMT reflow profiles across contract manufacturers.
Được đề xuất
Sensor Signal Conditioning Hub
Use the PIC18LF2539-I/SO as a sensor-interface hub in industrial control panels. The 10-bit ADC multiplexes across multiple 4-20 mA current loops or thermistor bridges, while the USART streams processed data to a parent PLC or HMI. Internal Flash stores calibration constants, sensor linearisation tables, and device identity; 256B EEPROM saves non-volatile settings across power cycles. The 28-SOIC footprint and 4.2-5.5 V supply mate cleanly with industrial 24 V rails after an external DC-DC buck such as the MCP16311 or MCP1700 LDO.
Được đề xuất
Consumer Motor-Driven Products
Hair dryers, blenders, robotic vacuums, and small kitchen appliances benefit from the PIC18LF2539-I/SO combining low cost and motor-control integration. The 28-SOIC footprint supports high-density PCB layouts in space-constrained enclosures, while 4.2-5.5 V operation mates with single-cell Li-ion plus boost-converter rails. The motor-control kernel drives brushed, brushless DC, and single-phase induction motors with hardware-accelerated PWM, simplifying firmware development and shortening time to market. On-chip Flash and EEPROM enable field updates and stored presets (e.g. blender speeds, vacuum modes).
Được đề xuất
HVAC Blower Control
HVAC blower controllers use the PIC18LF2539-I/SO for variable-speed drives that improve comfort and reduce energy cost. The motor-control kernel handles sinusoidal commutation and torque ripple smoothing, while the on-chip 10-bit ADC samples motor phase currents via shunt resistors. Industrial -40 °C to +85 °C operation tolerates duct-plenum ambient temperatures, and the integrated Power-On Reset simplifies line-voltage brown-out detection. The 28-SOIC footprint is footprint-compatible with earlier PIC18F/LF2431 designs common in legacy HVAC boards, easing service replacements.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18LF2539-I/SO — 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 | PIC18F2539-I/SO | PIC18LF2539T-I/SO | PIC18LF2539-I/SP | PIC18LF252-I/SO |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SOIC (7.50 mm wide) | 28-SOIC - same | 28-SOIC - same | 28-SPDIP - different PCB footprint | 28-SOIC - same |
| Core Architecture | PIC18 (8-bit Harvard RISC) | PIC18 (8-bit) - same | PIC18 (8-bit) - same | PIC18 (8-bit) - same | PIC18 (8-bit) - same |
| Program Memory | 24 KB Flash | 24 KB Flash | 24 KB Flash | 24 KB Flash | 32 KB Flash (+33%) |
| RAM | 1408 bytes | 1408 bytes | 1408 bytes | 1408 bytes | 1536 bytes (+9%) |
| Maximum Clock | 40 MHz (10 MIPS) | 40 MHz - same | 40 MHz - same | 40 MHz - same | 40 MHz - same |
| Supply Voltage | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V |
| Operating Temperature | -40 °C to +85 °C (Industrial) | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C |
| Motor Control Kernel | Yes (single-phase induction motor) | Yes - same kernel | Yes - same kernel | Yes - same kernel | Yes - same family |
| Estimated Unit Price (qty-1) | US $5.97 | Similar ($5-6 range) | Similar ($5-6 range) | Similar ($5-6 range) | Similar ($5-6 range) |
Bảo phân biệt quan trọng
- Dedicated single-phase induction motor-control kernel integrated on-chip (vsPIC18F25K22-I/SO)
- Industrial -40 °C to +85 °C operating temperature (vsPIC18LF2539-E/SO (extended commercial))
- Wide-body 28-SOIC (7.50 mm) footprint drop-in compatible with PIC18F/LF legacy designs (vsPIC18F45K22-I/P (40-pin DIP variant))
Ghi chú thiết kế
Estimated: PIC18LF2539-I/SO supply draws typically 2-15 mA active at 40 MHz depending on I/O loading and ADC clock configuration. Always add a 100 nF decoupling capacitor within 5 mm of VDD pin 20 and a bulk 1-10 µF tantalum or ceramic on the supply rail. For brown-out protection, use the configurable BOR voltage setting rather than relying on POR alone, especially in motor-drive environments where DC-bus sag can undercut MCU rail.
Estimated: keep the ICSP pinout (MCLR/Vpp, PGC, PGD) on the board edge with a 6-pin header footprint, even if not populated, to enable field debugging and firmware refresh. Route the crystal traces (OSC1/OSC2) short and symmetric; place a 4.7 kΩ pull-up on MCLR. For 28-SOIC wide-body designs, allocate at least 50 mm² of copper pour on the GND plane adjacent to the package to provide thermal dissipation at high I/O toggle rates.
Route PWM and CCP outputs away from ADC analog inputs; keep analog and digital ground returns separated and joined at a single point near the MCU Vss pin. The 10-bit ADC sampling is sensitive to switching-noise harmonics from the integrated motor-control PWM; place 100 nF + 10 µF RC filters as close as possible to AVdd/Vss pair, and average multiple ADC samples for noisy motor-current measurements. If the motor bridge injects common-mode noise onto the MCU rail, add a π-filter (10 µH + 100 nF + 100 nF) between the bridge return and MCU Vdd.
Three common mistakes: (1) leaving LVP (Low-Voltage Programming) enabled unintentionally by tying PGM high during reset — disable in config bits if not needed; (2) forgetting that the LF variants still need 4.2 V minimum (NOT 3.3 V) — common confusion with the PIC18LFxxK family; (3) exceeding 40 MHz clock at 5.5 V across the industrial -40 °C to +85 °C range — verify timing budget at corners. Always read config bit settings before locking firmware around oscillator source.
Thông tin tuân thủ
RoHS-compliant per Microchip product page; lead-free (Pb-free) and halogen-free per MSL-1 / JEDEC J-STD-020. No AEC-Q100 automotive qualification — choose a -Q automotive derivative for vehicle designs. Not MRQ-, MMS-, or PSID-qualified; lifecycle status ACTIVE per Verified Web Data 2026-09-28.
