PIC18F4439T-I/PT - 8-bit MCU 40MHz 12KB Flash 44-TQFP | Microchip
MPN: PIC18F4439T-I/PT ✓ Hoạt độngPIC18F4439T-I/PT Tóm tắt
An 8-bit PIC18 microcontroller is a Harvard-architecture RISC CPU that executes one instruction per clock cycle (except branches), running from internal Flash and offering flexible peripheral integration for embedded control. Within the broader semiconductor taxonomy, the PIC18F4439 belongs to the PIC18F family of enhanced Flash MCUs, which sits in the PIC microcontroller hierarchy (PIC10/12/16/18/24/32) and ultimately in the microcontroller category of integrated circuits used for embedded system design.
Key features include 12 KB Flash program memory, 640 bytes RAM, 10-bit A/D converter, 36 digital I/O pins, 40 MHz max CPU clock (10 MIPS instruction throughput), wide 4.2-5.5 V supply range, and nanoWatt Technology for reduced active and sleep currents. Peripherals include multiple timers with Power Control PWM (PCPWM), capture/compare/PWM modules, USART, SSP/SPI/I2C, and on-chip EEPROM emulation - features that distinguish it from simpler PIC16 devices and make it suitable for closed-loop control.
Architecturally, the PIC18F4439 adds the enhanced instruction set of the PIC18 family (16-bit instructions, linear memory map, hardware multiplier) and includes a 14-bit instruction width optimized for C-compiled code via MPLAB XC8. Power Control PWM is a key differentiator: it provides dedicated hardware for variable-frequency drives and three-phase motor commutation, eliminating the software overhead typical of general-purpose PWM modules.
Typical applications include motor control (BLDC, PMSM, AC induction), industrial automation, automotive body and powertrain subsystems, sensor-conditioning front ends, and consumer appliance control. When designing with this device, confirm that the 44-TQFP footprint, I/O count, and PWM channel configuration match the target board - the PIC18F4439 is pin-compatible with several PIC18F4xxx siblings and many newer PIC18F-K parts in the same TQFP-44 land pattern.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, helping engineers compare PIC18F4439T-I/PT against modern PIC18F-K and dsPIC33F motor-control parts side by side.
Bộ thay thế dễ dàng lắp đặt cho PIC18F4439T-I/PT — 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 PIC18F4439T-I/PT (cùng hình factor và footprint) — khác nhau ở Package, Operating Temperature, ADC, Core, Program Memory (Flash).
PIC18F4439-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F43K22-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F43K20-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F4423T-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F4410T-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F4439T-I/PT Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC 8-bit RISC (Harvard) |
| Family | PIC18F |
| Maximum CPU Frequency | 40 MHz (10 MIPS) |
| Program Memory (Flash) | 12 KB (6K x 16 words) |
| RAM | 640 bytes |
| Supply Voltage (VDD) | 4.2 V to 5.5 V |
| I/O Pins | 36 |
| ADC | 10-bit on-chip |
| Hộp | 44-TQFP (10x10 mm) |
| Kiểu lắp đặt | Surface Mount |
| Nhiệt độ hoạt động | -40C to +85C (Industrial) |
| Temperature Grade | Industrial |
| Power-Saving Mode | nanoWatt Technology |
| Packaging | Tape & Reel |
Cấu hình chân PIC18F4439T-I/PT
| Chân 1 | RC0/T1OSO/T1CKI — Digital I/O / Timer1 clock input / Timer1 oscillator output |
| Chân 2 | RC1/T1OSI/CCP2 — Digital I/O / Timer1 oscillator input / CCP2 |
| Chân 3 | RC2/CCP1 — Digital I/O / CCP1 PWM output |
| Chân 4 | RC3/SCK/SCL — Digital I/O / SPI clock / I2C clock |
| Chân 5 | RC4/SDI/SDA — Digital I/O / SPI data in / I2C data |
| Chân 6 | RC5/SDO — Digital I/O / SPI data out |
| Chân 7 | RC6/TX/CK — Digital I/O / USART TX / USART clock |
| Chân 8 | RC7/RX/DT — Digital I/O / USART RX / USART data |
| Chân 9 | RE0/RD/AN5 — Digital I/O / Parallel port read / ADC input |
| Chân 10 | RE1/WR/AN6 — Digital I/O / Parallel port write / ADC input |
| Chân 11 | RE2/CS/AN7 — Digital I/O / Parallel port chip select / ADC input |
| Chân 12 | AVDD — Analog supply voltage |
| Chân 13 | AVSS — Analog ground |
| Chân 14 | RB7/PGD — Digital I/O / ICSP programming data |
| Chân 15 | RB6/PGC — Digital I/O / ICSP programming clock |
| Chân 16 | RB5/PGM — Digital I/O / LVP programming |
| Chân 17 | RB4 — Digital I/O / Interrupt-on-change |
| Chân 18 | RB3/CCP2 — Digital I/O / CCP2 |
| Chân 19 | RB2/PWM4 — Digital I/O / Power Control PWM output 4 |
| Chân 20 | RB1/PWM3 — Digital I/O / Power Control PWM output 3 |
| Chân 21 | RB0/PWM2 — Digital I/O / Power Control PWM output 2 |
| Chân 22 | VDD — Digital supply voltage (4.2 V to 5.5 V) |
| Chân 23 | VSS — Digital ground |
| Chân 24 | RD7/PWM11 — Digital I/O / Power Control PWM output 11 |
| Chân 25 | RD6/PWM10 — Digital I/O / Power Control PWM output 10 |
| Chân 26 | RD5/PWM9 — Digital I/O / Power Control PWM output 9 |
| Chân 27 | RD4/PWM8 — Digital I/O / Power Control PWM output 8 |
| Chân 28 | RC7/RX/DT (alt) — Note: see datasheet for multiplexed mapping |
| Chân 29 | RD3/PWM7 — Digital I/O / Power Control PWM output 7 |
| Chân 30 | RD2/PWM6 — Digital I/O / Power Control PWM output 6 |
| Chân 31 | RD1/PWM5 — Digital I/O / Power Control PWM output 5 |
| Chân 32 | RD0/PWM1 — Digital I/O / Power Control PWM output 1 |
| Chân 33 | OSC1/RA7 — Crystal oscillator input / digital I/O |
| Chân 34 | OSC2/RA6 — Crystal oscillator output / digital I/O |
| Chân 35 | RA0/AN0 — Digital I/O / ADC input 0 |
| Chân 36 | RA1/AN1 — Digital I/O / ADC input 1 |
| Chân 37 | RA2/AN2/VREF- — Digital I/O / ADC input 2 / ADC VREF- |
| Chân 38 | RA3/AN3/VREF+ — Digital I/O / ADC input 3 / ADC VREF+ |
| Chân 39 | RA4/T0CKI — Digital I/O / Timer0 clock input |
| Chân 40 | RA5/AN4/SS — Digital I/O / ADC input 4 / SPI slave select |
| Chân 41 | MCLR/VPP — Master clear reset / programming voltage |
| Chân 42 | VDD — Digital supply voltage (4.2 V to 5.5 V) |
| Chân 43 | VSS — Digital ground |
| Chân 44 | VDD — Digital supply voltage (4.2 V to 5.5 V) |
Ứng dụng tiêu biểu
PIC18F4439T-I/PT phù hợp cho 6 Áp dụngs: Brushless DC (BLDC) Motor Control, Industrial Automation & PLC I/O Modules, Automotive Body & Powertrain Subsystems, Consumer Appliance Control, Sensor Conditioning & Data Acquisition Front Ends, HVAC Fan & Blower Speed Controllers.
Brushless DC (BLDC) Motor Control
The PIC18F4439T-I/PT's dedicated Power Control PWM (PCPWM) hardware makes it a strong fit for sensorless and sensored BLDC motor control. The integrated PCPWM module provides three independent PWM outputs with programmable dead-band, center-aligned mode, and hardware fault inputs - features normally requiring an external motor-control ASIC. At 40 MHz, the firmware loop can execute ADC sampling, back-EMF zero-cross detection, and PWM commutation well within 100 us. For a 24 V hobby drone or 48 V e-bike BLDC controller, this part eliminates the software overhead of general-purpose PWM and supports up to 20 kHz PWM switching.
Được đề xuất
Industrial Automation & PLC I/O Modules
In PLC digital-input and analog-conditioning front ends, the PIC18F4439T-I/PT's 36 I/O pins, 10-bit ADC, and 5 V supply operation align with industrial 24 V I/O logic after external optocoupling. The 12 KB Flash is sufficient for protocol stacks such as Modbus RTU slave over USART, digital filtering, and debouncing routines. The 40 MHz instruction throughput enables 1 ms scan loops with substantial headroom. Engineers use this part for low-channel-count PLC bricks, sensor-hub gateways, and distributed I/O nodes operating over 4.2-5.5 V rails.
Được đề xuất
Automotive Body & Powertrain Subsystems
Automotive body controllers, HVAC actuators, and powertrain sensors often use 5 V MCUs with industrial temperature grades. The PIC18F4439T-I/PT meets this with its -40C to +85C industrial range and 5 V operation. For under-hood and AEC-Q100-qualified applications, however, a Q100-graded PIC18 variant should be selected instead. Within body electronics (door modules, mirror control, lighting drivers), the 12 KB Flash, PWM channels, and ADC inputs handle multiple sensor inputs and actuator drive signals while remaining low BOM.
Được đề xuất
Consumer Appliance Control
The PIC18F4439T-I/PT appears in washing machines, refrigerators, induction cooktops, and small kitchen appliances where the PCPWM module drives the triac or MOSFET stage for variable-speed compressor or fan control. Its nanoWatt sleep modes support Energy Star standby targets below 100 uA. With 12 KB Flash, manufacturers fit application firmware, safety routines, and UI handling (button + LED + buzzer) without external memory. The 5 V operation aligns with universal-input 5 V aux rails from SMPS controllers.
Được đề xuất
Sensor Conditioning & Data Acquisition Front Ends
Sensor hubs that aggregate analog signals from temperature, pressure, and flow transducers benefit from the PIC18F4439T-I/PT's 10-bit ADC, 36 I/O, and 40 MHz CPU. With 10 MIPS throughput, the MCU can run digital filtering, linearization, and Modbus/CAN-style output over USART. For 16-channel thermocouple or RTD conditioning boards, the 36 I/O provide ample pin count before a port expander is needed. The 5 V operation simplifies interface to legacy 5 V sensor signal chains and instrumentation amplifiers.
Được đề xuất
HVAC Fan & Blower Speed Controllers
Variable-speed blower and fan controllers in HVAC systems use the PIC18F4439T-I/PT to generate PWM drive for the motor power stage while sampling temperature sensors and user-setpoint inputs. The dedicated PCPWM module supports the precise duty-cycle control needed for closed-loop RPM regulation. With 12 KB Flash and 640 B RAM, the firmware fits PI controllers, soft-start ramps, and fault-handling routines. Industrial -40C to +85C grade supports rooftop and basement HVAC environments.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18F4439T-I/PT — 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 | PIC18F4439-I/PT | PIC18F43K22-I/PT | PIC18F43K20-I/PT | PIC18F4423T-I/PT | PIC18F4410T-I/PT |
|---|---|---|---|---|---|---|
| Package | 44-TQFP (10x10) | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core / Architecture | PIC 8-bit (Harvard) | PIC 8-bit (Harvard) | PIC 8-bit (Harvard) | PIC 8-bit (Harvard) | PIC 8-bit (Harvard) | PIC 8-bit (Harvard) |
| Max CPU Frequency | 40 MHz | 40 MHz | 64 MHz | 64 MHz | 40 MHz | 40 MHz |
| Program Memory (Flash) | 12 KB | 12 KB | 32 KB | 16 KB | 8 KB | 16 KB |
| RAM | 640 bytes | 640 bytes | 1.5 KB | 1 KB | 768 bytes | 768 bytes |
| I/O Pins | 36 | 36 | 36 | 36 | 36 | 36 |
| ADC | 10-bit | 10-bit | 10-bit | 10-bit | 12-bit | 10-bit |
| Dedicated Motor PWM (PCPWM) | Yes | Yes | No (standard CCP/ECCP) | No (standard CCP/ECCP) | No | No |
Bảo phân biệt quan trọng
- Dedicated Power Control PWM (PCPWM) hardware (vsPIC18F43K22-I/PT)
- Mature motor-control firmware ecosystem (vsPIC18F4439-I/PT)
- 12-bit ADC option in same footprint (vsPIC18F4423T-I/PT)
Ghi chú thiết kế
The PIC18F4439T-I/PT requires a stable 4.2-5.5 V supply. Place a 100 nF decoupling capacitor on each VDD pin (pins 22, 42, 44) within 5 mm of the package, plus a bulk 10 uF tantalum or aluminum-polymer cap on the main 5 V rail. For noise-sensitive analog channels (AVDD/AVSS at pins 12-13), add a ferrite bead or LC filter between digital VDD and AVDD to isolate ADC reference noise.
The TQFP-44 land pattern uses 0.8 mm pitch pads - ensure the PCB stencil apertures are 1:1 or slightly reduced (0.9:1) to prevent solder bridging during reflow. For production boards, place a GND copper pour under the IC body (avoiding exposed pad since TQFP-44 has none) to provide thermal relief and a low-impedance ground reference for ADC conversions. Keep analog traces short and away from PWM switching nets.
Common pitfalls when designing with PIC18F4439T-I/PT: (1) Forget to disable analog inputs on shared pins or the ADC draws extra current in sleep mode - configure ANSEL registers on every reset. (2) MCLR pin (pin 41) must be tied to VDD through a 10 kohm resistor if not used, otherwise the MCU stays in reset. (3) When migrating firmware from PIC18F4439 to PIC18F43K22, the PWM output pin mapping changes - verify peripheral pin select registers. (4) Configuration bits must be set explicitly; never rely on defaults in production.
Thông tin tuân thủ
RoHS status not explicitly stated in the verified web data; Microchip's standard PIC18F family is typically lead-free and RoHS compliant - set to 'unknown' per anti-fabrication rule. Not AEC-Q100 qualified; the industrial -40C to +85C grade is suitable for body electronics but not under-hood automotive.