PIC18LF4439-I/P - 8-Bit 40MHz MCU 12KB Flash 40-PDIP | Microchip
MPN: PIC18LF4439-I/P ✓ Hoạt độngPIC18LF4439-I/P Tóm tắt
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, non-volatile program memory, and peripherals on a single die. The PIC18F family uses a Harvard-architecture RISC core with a 16-bit instruction word and 8-bit data path, sitting in the broader semiconductor hierarchy of microcontroller -> embedded processor -> semiconductor device. The 'LF' prefix designates low-voltage operation (typically 2.0V-3.6V), enabling battery-powered and portable designs where standard 5V PIC18F parts would be unsuitable.
Key features include a 10-bit ADC with up to 8 channels, multiple PWM outputs suitable for motor control, a USART, MSSP (SPI/I2C), capture/compare/PWM modules, and dual analog comparators. The PIC18LF4439 also includes special motor-control peripherals, notably the Power Control PWM module and quadrature encoder interface, distinguishing it within the PIC18F lineup for motion-control applications.
The architecture uses a Harvard-memory RISC core with hardware multiplier and 32-level stack, achieving up to 10 MIPS throughput at 40 MHz. The integrated motor-control PWM block delivers up to 14-bit resolution with center-aligned or edge-aligned modes, supporting complementary outputs with programmable dead-time insertion - a feature targeted at three-phase inverter designs. The 10-bit ADC with dual Sample-and-Hold enables simultaneous voltage and current sensing in FOC (field-oriented control) loops.
Typical applications include BLDC motor control (single/three-phase), industrial drives, HVAC fan/blower controllers, home automation, low-power sensor platforms, and battery-powered instrumentation where the wide 2.0V-3.6V operating range is critical.
When designing with this device, ensure proper decoupling (100 nF + 10 uF near VDD/AVDD pins) and that the MCLR pin is tied through a pull-up resistor with the standard ICSP layout for in-circuit serial programming retention.
This page synthesizes distributor pricing, drop-in alternatives, parametric comparisons, and practical design notes for the PIC18LF4439-I/P that are not collated in the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho PIC18LF4439-I/P — 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 PIC18LF4439-I/P (cùng hình factor và footprint) — khác nhau ở Core Architecture, Mounting Type, ADC, Operating Temperature, I/O Pins.
PIC18LF4439-I/ML
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F4439-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF4331-I/P
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18LF4439-E/P
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18LF4439-I/P Tỷ lệ tối đa & tính chất điện
| Manufacturer | Microchip Technology |
| Series | PIC 18F |
| Core Architecture | 8-bit RISC Harvard |
| Core Processor | PIC |
| Core Speed | 40 MHz |
| Program Memory Type | FLASH |
| Program Memory Size | 12 KB (6 K x 16) |
| RAM Size | 640 bytes |
| Number of I/O Pins | 32 |
| Number of Terminals | 40 |
| Package Type | 40-PDIP (DIP-40) |
| Package Code | PDIP |
| Terminal Form | Through-Hole |
| Temperature Grade | Industrial |
| Nhiệt độ hoạt động | -40C to +85C |
| Supply Voltage Range (LF) | 2.0 V to 3.6 V |
| Kiểu lắp đặt | Through-Hole |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC18LF4439-I/P
| Chân 1 | MCLR — Master Clear (Reset) input, active low |
| Chân 2 | RA0/AN0 — Digital I/O / Analog input 0 |
| Chân 3 | RA1/AN1 — Digital I/O / Analog input 1 |
| Chân 4 | RA2/AN2 — Digital I/O / Analog input 2 |
| Chân 5 | RA3/AN3 — Digital I/O / Analog input 3 |
| Chân 6 | RA4/AN4 — Digital I/O / Analog input 4 |
| Chân 7 | RA5/AN5 — Digital I/O / Analog input 5 |
| Chân 8 | RE0/RD — Digital I/O / Parallel Slave Port |
| Chân 9 | RE1/WR — Digital I/O / Parallel Slave Port |
| Chân 10 | RE2/CS — Digital I/O / Parallel Slave Port |
| Chân 11 | VDD — Positive supply voltage (2.0V-3.6V) |
| Chân 12 | VSS — Ground reference |
| Chân 13 | OSC1/CLKI — Crystal input / External clock in |
| Chân 14 | OSC2/CLKO — Crystal output / Clock out |
| Chân 15 | RC0 — Digital I/O / PWM output |
| Chân 16 | RC1 — Digital I/O / PWM output |
| Chân 17 | RC2 — Digital I/O / PWM output |
| Chân 18 | RC3 — Digital I/O / PWM output |
| Chân 19 | RD0/PSP0 — Digital I/O / Parallel Slave Port |
| Chân 20 | RD1/PSP1 — Digital I/O / Parallel Slave Port |
| Chân 21 | RD2/PSP2 — Digital I/O / Parallel Slave Port |
| Chân 22 | RD3/PSP3 — Digital I/O / Parallel Slave Port |
| Chân 23 | RC4 — Digital I/O / PWM output |
| Chân 24 | RC5 — Digital I/O / PWM output |
| Chân 25 | RC6 — Digital I/O / PWM output |
| Chân 26 | RC7 — Digital I/O / PWM output |
| Chân 27 | RD4/PSP4 — Digital I/O / Parallel Slave Port |
| Chân 28 | RD5/PSP5 — Digital I/O / Parallel Slave Port |
| Chân 29 | RD6/PSP6 — Digital I/O / Parallel Slave Port |
| Chân 30 | RD7/PSP7 — Digital I/O / Parallel Slave Port |
| Chân 31 | VSS — Ground reference |
| Chân 32 | VDD — Positive supply voltage (2.0V-3.6V) |
| Chân 33 | RB0/INT0 — Digital I/O / External Interrupt 0 |
| Chân 34 | RB1/INT1 — Digital I/O / External Interrupt 1 |
| Chân 35 | RB2/INT2 — Digital I/O / External Interrupt 2 |
| Chân 36 | RB3/INT3 — Digital I/O / External Interrupt 3 |
| Chân 37 | RB4 — Digital I/O |
| Chân 38 | RB5 — Digital I/O |
| Chân 39 | RB6/PGC — Digital I/O / ICSP Clock |
| Chân 40 | RB7/PGD — Digital I/O / ICSP Data |
Ứng dụng tiêu biểu
PIC18LF4439-I/P phù hợp cho 7 Áp dụngs: BLDC Motor Control, Industrial HVAC Fan Control, Battery-Powered Sensor Hub, Home Automation Controllers, Pump and Valve Actuators, Educational and Hobby Electronics, Automotive Aftermarket Accessories.
BLDC Motor Control
The PIC18LF4439-I/P is engineered for BLDC motor control. Its integrated Power Control PWM module with up to 14-bit resolution, complementary outputs, programmable dead-time, and fault input eliminates external motor-control ASICs. The 10-bit ADC with dual sample-and-hold enables simultaneous phase current sensing in FOC loops, while the quadrature encoder interface supports sensored position feedback. Operating from 2.0V-3.6V, it fits battery-powered E-bike and cordless tool designs where standard 5V PIC18F parts cannot run.
Được đề xuất
Industrial HVAC Fan Control
HVAC variable-speed fan controllers benefit from the PIC18LF4439-I/P's integrated PWM and encoder peripherals plus industrial -40C to +85C temperature rating. The 32 I/O pins interface with status LEDs, keypad inputs, and UART/I2C sensors (temperature, humidity, pressure). Wide 2.0V-3.6V operation supports 3.3V system rails, simplifying power tree design in 24V industrial systems with intermediate 3.3V conversion.
Được đề xuất
Battery-Powered Sensor Hub
Low-power portable sensor hubs benefit from the PIC18LF4439-I/P's 2.0V-3.6V operating range and integrated peripherals (ADC, USART, MSSP). Sleep currents can be reduced to the low-microamp range using the LP and Sleep modes described in Microchip datasheet DS39630F. The 12 KB FLASH fits small protocol stacks (Modbus RTU, simple sensor fusion), and the 640-byte RAM accommodates data buffering. Industrial temperature grade supports outdoor deployments.
Được đề xuất
Home Automation Controllers
Smart-home control panels benefit from the PIC18LF4439-I/P's I2C, SPI, and UART peripherals for connecting to displays, sensors, and wireless modules. The 40-PDIP package simplifies hand-soldered prototypes, while the 12 KB FLASH fits control logic and simple state machines. Operating from 2.0V-3.6V, it integrates easily with 3.3V-only peripherals and wireless modules without level translation.
Được đề xuất
Pump and Valve Actuators
Small pumps and proportional valves benefit from the PIC18LF4439-I/P's motor-control PWM and 32 I/O pins for actuator drivers, position feedback encoders, and limit switches. The integrated 10-bit ADC supports current sensing and closed-loop proportional control. Industrial temperature grade (-40C to +85C) and through-hole PDIP package suit retrofit installations in industrial control cabinets.
Được đề xuất
Educational and Hobby Electronics
The PIC18LF4439-I/P's 40-PDIP through-hole package and rich peripheral set make it ideal for educational labs and hobby projects. It is fully supported by Microchip's MPLAB X IDE, XC8 compiler, and a free simulator, with extensive application notes, code examples, and reference designs online. Breadboard-friendly form factor allows quick prototyping without SMD reflow equipment.
Được đề xuất
Automotive Aftermarket Accessories
Aftermarket automotive accessories (auxiliary fans, lighting controllers, signal decoders) benefit from the PIC18LF4439-I/P's industrial temperature rating, motor-control PWM, and 32 I/O pins. Although NOT AEC-Q100 qualified, the part is widely used in non-safety automotive aftermarket products where automotive-grade is not required. Operating from 2.0V-3.6V with a separate regulator suits 12V automotive battery systems.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18LF4439-I/P — 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 | PIC18LF4439-I/ML | PIC18F4439-I/P | PIC18LF4331-I/P | PIC18LF4439-E/P |
|---|---|---|---|---|---|
| Package | 40-PDIP | 44-QFN (ML) - SMD only | 40-PDIP - same | 40-PDIP - same | 40-PDIP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| FLASH Size | 12 KB | 12 KB | 12 KB | 8 KB (-33%) | 12 KB |
| RAM Size | 640 B | 640 B | 640 B | 768 B | 640 B |
| Operating Voltage | 2.0V-3.6V (LF) | 2.0V-3.6V | 4.2V-5.5V (F) | 2.0V-3.6V | 2.0V-3.6V |
| Max Clock Speed | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| Temperature Grade | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +85C | Extended -40C to +125C |
| Motor Control PWM | Yes (14-bit) | Yes (14-bit) | Yes (14-bit) | Yes (14-bit) | Yes (14-bit) |
Bảo phân biệt quan trọng
- Integrated motor-control PWM with 14-bit resolution and fault input (vsPIC18F4550-I/P)
- Low-voltage (LF) operation supports battery-powered designs (vsPIC18F4439-I/P)
- Dual sample-and-hold ADC for simultaneous motor current sensing (vsPIC18LF4331-I/P)
Ghi chú thiết kế
Estimated: VDD=3.3V, IDD active at 40 MHz is approximately 15 mA per Microchip datasheet DS39630F. Use a 100 nF decoupling capacitor close to each VDD pin (pins 11 and 32) and a 10 uF bulk capacitor on the supply rail. Adding a ferrite bead on VDD helps suppress switching noise from digital outputs entering analog sections.
Route analog signals (AN0-AN7) away from digital PWM outputs to minimize coupled noise into ADC measurements. Keep the MCLR pin trace short, and place the pull-up resistor (typically 10 kOhm) close to the pin. For ICSP programming, expose the ICSPDAT (RB7/PGD), ICSPCLK (RB6/PGC), and MCLR pins on a 6-pin header for production programming access.
Estimated: at 3.3V VDD and 15 mA active current, power dissipation is approximately 50 mW, well below thermal limits of the 40-PDIP package (theta_JA ~50 C/W). Junction temperature rise is negligible (<3C). However, if driving 32 outputs at 20 mA each, dissipation can exceed 1 W - calculate PJ = (VDD - Vload_avg) x Iout x N before claiming thermal headroom.
Do not connect AVDD to VDD through a ferrite without bypassing - AVDRD noise degrades ADC accuracy. Never leave the MCLR pin floating - use a 10 kOhm pull-up to VDD. When using the LF (low-voltage) variant, ensure all I/O signals from external devices operate within 0 to VDD range, or add clamping to avoid exceeding VDD+0.3V absolute maximum.
Thông tin tuân thủ
RoHS compliant per Microchip product page; not AEC-Q100 qualified (industrial grade only). The /P suffix in PIC18LF4439-I/P indicates lead-free PDIP package per Microchip ordering conventions.
