PIC18F2439-I/SP - 8-bit Motor Control MCU, 12KB Flash | Microchip
MPN: PIC18F2439-I/SP ✓ Hoạt độngPIC18F2439-I/SP Tóm tắt
An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path; the PIC18 family extends Microchip's baseline PIC16 architecture with a 16-bit instruction word, hardware multiplier, and linear (paged) memory map for higher code density. Within the broader taxonomy, the PIC18F2439 belongs to the PIC18F2xxx motor-control sub-family, which itself falls under the PIC18F high-performance group and ultimately under Microchip's 8-bit MCU portfolio. Engineers select this class when deterministic interrupt response, on-chip motor-control peripherals, and C-compiler friendly development outweigh the throughput advantage of 16-bit or 32-bit cores.
Key features include the dedicated single-phase induction motor (SPIM) control kernel with auto-commutation, two 10-bit PWM channels with complementary outputs, a 10-bit ADC with 200 ksps conversion rate, nanoWatt power-saving modes, and ICD (In-Circuit Debugger) support. The 28-pin SPDIP package provides through-hole ease-of-prototyping while sharing the same silicon as the SOIC variant, allowing PCB layout reuse for production runs.
The PIC18F2439 uses a Harvard RISC architecture with a 16-bit instruction word and an 8-bit data path, achieving most instructions in a single 4-cycle clock. On-chip peripherals are mapped through a linear SFR bank, and self-programming Flash enables in-application firmware upgrades. The motor-control kernel handles back-EMF zero-cross detection and auto-commutation timing in hardware, offloading critical loop tasks from the CPU.
Typical applications include single-phase induction motor drives (washing machines, fans, pumps), appliance controls, ceiling-fan regulators, small HVAC blowers, and low-cost variable-speed tools. The wide 4.2 V to 5.5 V supply range allows direct operation from rectified 5 V rails. In production designs, the SOIC variant (PIC18F2439-I/SO) is preferred for SMT assembly while the SPDIP variant is reserved for breadboard and lab prototyping.
Bộ thay thế dễ dàng lắp đặt cho PIC18F2439-I/SP — 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 PIC18F2439-I/SP (cùng hình factor và footprint) — khác nhau ở Package, ADC, Operating Temperature, I/O Pins, Core.
PIC18F2431-I/SP
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F2331-I/SP
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F2439-I/SP Tỷ lệ tối đa & tính chất điện
| Core Architecture | 8-bit PIC18 RISC |
| Program Memory (Flash) | 12 KB |
| SRAM | 640 bytes |
| EEPROM | 256 bytes |
| Maximum Clock Speed | 40 MHz |
| Instruction Throughput | 10 MIPS |
| Điện áp cung cấp | 4.2 V to 5.5 V |
| I/O Pins | 21 |
| ADC | 10-bit, multiple channels |
| PWM Channels | 2 (with complementary outputs) |
| Motor Control Kernel | Single-phase induction motor (SPIM) |
| Hộp | 28-pin SPDIP (Skinny Plastic DIP) |
| Kiểu lắp đặt | Through-Hole |
| Nhiệt độ hoạt động | -40 C to +85 C (Industrial) |
| In-Circuit Debug | ICD support |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC18F2439-I/SP
| Chân 1 | MCLR — Master Clear (Reset) input, active low |
| Chân 2 | RA0 — PORTA bit 0 (digital I/O or analog input) |
| Chân 3 | RA1 — PORTA bit 1 (digital I/O or analog input) |
| Chân 4 | RA2 — PORTA bit 2 (digital I/O or analog input) |
| Chân 5 | RA3 — PORTA bit 3 (digital I/O or analog input) |
| Chân 6 | RA4 — PORTA bit 4 (digital I/O or analog input) |
| Chân 7 | RA5 — PORTA bit 5 (digital I/O or analog input) |
| Chân 8 | VSS — Ground reference |
| Chân 9 | OSC1 — Oscillator input / external clock input |
| Chân 10 | OSC2 — Oscillator output |
| Chân 11 | RC0 — PORTC bit 0 (digital I/O or timer I/O) |
| Chân 12 | RC1 — PORTC bit 1 (digital I/O or PWM output) |
| Chân 13 | RC2 — PORTC bit 2 (digital I/O or PWM output) |
| Chân 14 | RC3 — PORTC bit 3 (digital I/O or PWM output) |
| Chân 15 | RC4 — PORTC bit 4 (digital I/O or PWM output) |
| Chân 16 | RC5 — PORTC bit 5 (digital I/O or PWM output) |
| Chân 17 | RC6 — PORTC bit 6 (digital I/O or TX/CK) |
| Chân 18 | RC7 — PORTC bit 7 (digital I/O or RX/DT) |
| Chân 19 | VSS — Ground reference |
| Chân 20 | VDD — Positive supply voltage (4.2V to 5.5V) |
| Chân 21 | RB0 — PORTB bit 0 (digital I/O, interrupt-on-change) |
| Chân 22 | RB1 — PORTB bit 1 (digital I/O, interrupt-on-change) |
| Chân 23 | RB2 — PORTB bit 2 (digital I/O, interrupt-on-change) |
| Chân 24 | RB3 — PORTB bit 3 (digital I/O, interrupt-on-change) |
| Chân 25 | RB4 — PORTB bit 4 (digital I/O, interrupt-on-change) |
| Chân 26 | RB5 — PORTB bit 5 (digital I/O, interrupt-on-change) |
| Chân 27 | RB6 — PORTB bit 6 (digital I/O, ICD clock) |
| Chân 28 | RB7 — PORTB bit 7 (digital I/O, ICD data) |
Ứng dụng tiêu biểu
PIC18F2439-I/SP phù hợp cho 6 Áp dụngs: Single-Phase Induction Motor Drive, Ceiling Fan Speed Regulator, Appliance Pump Controller, HVAC Blower Motor Control, Power Tool Speed Controller, Small Inverter / UPS Fan Drive.
Single-Phase Induction Motor Drive
The PIC18F2439-I/SP is purpose-built for single-phase induction motor (SPIM) control in appliances such as washing-machine drum motors, ceiling fans, small pumps, and HVAC blowers. Its dedicated motor-control kernel performs back-EMF zero-cross detection and auto-commutation in hardware, eliminating the CPU overhead that would otherwise force a faster (and more expensive) MCU. The two complementary-output PWM channels with programmable dead-band drive a TRIAC or half-bridge stage directly, and the 10-bit ADC samples shunt-current and line-voltage feedback at up to 200 ksps for closed-loop speed regulation. Choosing the -I/SP (SPDIP-28) variant specifically simplifies breadboard prototyping and field-replacement servicing.
Được đề xuất
Ceiling Fan Speed Regulator
The PIC18F2439-I/SP's 21 I/O pins and integrated motor-control peripherals make it a natural fit for ceiling-fan regulators that replace traditional capacitor-based step controllers. The MCU drives a TRIAC through an opto-isolated gate, senses RPM via a Hall or back-EMF tap on the auxiliary winding, and provides soft-start ramps that reduce acoustic noise and mechanical stress. The 4.2-5.5 V supply range allows direct operation from rectified mains via a small capacitive dropper or linear regulator. The -I/SP SPDIP package is well suited to the through-hole PCB layouts common in ceiling-fan wall modules.
Được đề xuất
Appliance Pump Controller
Dishwasher and washing-machine drain pumps demand precise variable-speed control to reduce noise and water hammer. The PIC18F2439-I/SP runs the closed-loop PID at 10 MIPS, while its motor-control kernel handles the TRIAC firing-angle math, freeing CPU cycles for safety diagnostics and user-interface LEDs. The 256-byte EEPROM stores calibration constants, and the 640-byte SRAM is sufficient for control-loop buffers without external memory. Its 28-pin SPDIP footprint is compatible with the through-hole assemblies used in appliance control boards.
Được đề xuất
HVAC Blower Motor Control
Variable-speed HVAC blowers benefit from the PIC18F2439-I/SP's deterministic interrupt response and on-chip motor-control peripherals. The MCU drives a TRIAC or back-to-back SCR pair, reads temperature sensors through its 10-bit ADC, and modulates blower speed to maintain set-point airflow. The nanoWatt power-saving modes reduce standby consumption below 1 µA when the system is idle, helping meet Energy Star requirements. The -I/SP through-hole package simplifies in-field service replacements in legacy HVAC equipment.
Được đề xuất
Power Tool Speed Controller
Handheld power tools such as drills, screwdrivers, and small saws use universal series-wound or single-phase induction motors that benefit from closed-loop RPM regulation. The PIC18F2439-I/SP reads back-EMF via its ADC, computes load-compensated firing angles, and modulates a TRIAC to maintain target RPM under varying mechanical load. Its 10 MIPS throughput handles the 1-ms control loop comfortably while leaving headroom for trigger-input debouncing and over-temperature protection. The ICD support allows in-circuit firmware tuning during development.
Được đề xuất
Small Inverter / UPS Fan Drive
Low-power UPS and inverter systems use 12 V or 24 V brushless DC and single-phase AC fans for cooling; the PIC18F2439-I/SP can drive both fan types by reconfiguring its PWM and ADC channels. The 4.2-5.5 V supply rails directly off the inverter's logic rail, eliminating an auxiliary converter. The dedicated motor-control kernel simplifies fan-tachometer feedback handling and stall detection, which improves reliability in unattended UPS installations. The SPDIP package aids servicing in field-replaceable fan modules.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18F2439-I/SP — 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 | PIC18F2431-I/SP | PIC18F2331-I/SP | PIC18F4550-I/P |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | SPDIP-28 | SPDIP-28 - same | SPDIP-28 - same | PDIP-40 - not compatible |
| Flash Memory | 12 KB | 16 KB | 8 KB | 32 KB |
| SRAM | 640 B | 640 B | 640 B | 2048 B |
| EEPROM | 256 B | 256 B | 256 B | 256 B |
| Max Clock | 40 MHz | 40 MHz | 40 MHz | 48 MHz |
| I/O Pins | 21 | 21 | 21 | 35 |
| ADC | 10-bit | 10-bit | 10-bit | 10-bit |
| PWM Channels | 2 | 2 | 2 | 2 (plus CCP) |
| Motor Control Kernel | SPIM (single-phase IM) | SPIM (single-phase IM) | SPIM (single-phase IM) | None (general purpose) |
| Supply Voltage | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 2.0 V to 5.5 V |
Bảo phân biệt quan trọng
- Dedicated single-phase induction motor (SPIM) control kernel (vsPIC18F4550-I/P)
- Right-sized Flash for cost-sensitive motor control (vsPIC18F2431-I/SP)
- Through-hole SPDIP package for prototyping (vsPIC18F2439-I/SO)
Ghi chú thiết kế
The PIC18F2439-I/SP requires a stable 4.2 V to 5.5 V supply. Decouple VDD with a 100 nF ceramic capacitor placed within 5 mm of the VDD pin, plus a bulk 10 µF electrolytic or tantalum on the same rail. In noisy motor environments, add a ferrite bead or LC filter on the incoming VDD line to suppress TRIAC dv/dt transients coupling into the MCU supply.
Keep the ICSP/ICD pins (RB6/RB7 and MCLR) accessible in production layouts; Microchip programmers require these even on assembled boards for in-system firmware updates. Route the oscillator traces short and surrounded by ground pour to minimize EMI pickup from the motor switching nodes. Place the MCLR pull-up (typically 10 kΩ) close to the MCU pin.
When sampling back-EMF or shunt current with the 10-bit ADC, place a small RC anti-aliasing filter (typically 1 kΩ + 100 pF) at each analog input. Synchronize ADC conversions to the PWM period to avoid sampling during switching transients. The motor-control kernel's zero-cross detector expects filtered analog signals - excessive noise causes false triggers and motor commutation errors.
Estimated: EEPROM write endurance is 1 million cycles minimum per datasheet - implement wear-leveling for parameters updated frequently (RPM set-points, calibration). Brown-out Reset (BOR) must be enabled in configuration bits; without it, slow VDD rise times can corrupt program counter and cause erratic behavior. The 'I' suffix denotes industrial temperature grade (-40 to +85 °C); 'E' is extended (-40 to +125 °C) and not interchangeable for harsh environments.
Thông tin tuân thủ
RoHS and REACH compliant per Microchip product environmental compliance documentation. Industrial temperature grade (-40 to +85 °C). Not AEC-Q100 qualified - automotive motor-control applications should use AEC-Q100 qualified parts from Microchip's automotive portfolio.
