PIC18F4439-I/PT - 8-bit 40MHz 12KB Flash MCU w/ Motor Control | Microchip
MPN: PIC18F4439-I/PT ✓ فعالPIC18F4439-I/PT جائزہ
The PIC18F family of microcontrollers (MCU) is an 8-bit C-compiler-friendly architecture that combines high computational performance with rich on-chip peripherals. Within this family, the PIC18F4439 belongs to the PIC18FXX39 subgroup that adds a dedicated motion-feedback PWM kernel, a quadrature encoder interface, an input-capture module, and 8 channels of 10-bit analog-to-digital conversion - features that target closed-loop motor-control and switched-mode power-conversion designs.
Key specifications include 40 MHz maximum clock speed, 12 KB (typically 6K x 16) of self-programmable Flash with 256 bytes of EEPROM, 768 bytes of SRAM, 36 user I/O lines, a 10-bit ADC with eight channels, dual PWM outputs suitable for full-bridge or three-phase topologies, and an ICD (In-Circuit Debugger) interface. The device supports supply voltages from 4.2 V to 5.5 V and runs the standard PIC18 instruction set, enabling code reuse across the PIC18 portfolio.
Architecturally, the PIC18F4439 integrates the PIC18 RISC core with hardware multiply and a hardware motor-control PWM module featuring dedicated time bases and edge-aligned/center-aligned modes. This combination lets the engineer's firmware maintain deterministic control loop timing without loading the CPU, which is essential for sinusoidal commutation of single-phase induction motors and variable-frequency drives.
Typical applications include single-phase induction motor drives, appliance fan and pump controllers, BLDC and PMDC motor controllers, digital inverters, uninterruptible power supplies, switched-mode power supplies, and industrial automation boards that require deterministic PWM and precise feedback sampling.
When designing with this part, follow the datasheet decoupling guidance: place one 100 nF ceramic bypass capacitor adjacent to each VDD/VSS pair and a bulk capacitor at the regulator output. For motor-control layouts, keep the high-current switching traces away from the analog AVSS/AVDD traces to avoid ground-bounce noise coupling into the ADC result register. The PIC18F4439-I/PT is the industrial-temperature variant (-40 C to +85 C); the PIC18F4439-E/PT extends this to the extended grade while the PIC18LF4439-I/PT supports lower voltage operation for battery-aware designs.
This page consolidates datasheet specifications, distributor pricing as of 2026-09-27, and verified drop-in alternatives from Microchip's PIC18F family so that engineers can make a faster sourcing and design-in decision than by reading dozens of separate vendor pages.
کے لیے ڈراپ اِن متبادل PIC18F4439-I/PT — یکساں پیکیج، پن سے پن مطابقت پذیر۔ مختلف پیکیج والے پرزے جن کے لیے PCB دوبارہ کام درکار ہو، شامل نہیں ہیں۔
اس سیریز میں مختلف ورژن
اسی سیریز کے ماڈلز جو ڈراپ اِن مطابقت رکھتے ہیں PIC18F4439-I/PT (یکساں فارم فیکٹر اور فٹ پرنٹ) — میں مختلف Package, Operating Temperature, Core Architecture, ADC, Program Memory (Flash).
PIC18F4439-E/PT
✅ ڈراپ-اِن ⚠️ تفصیلات غیر تصدیق شدہقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC18F4431-I/PT
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC18F4439-I/PT زیادہ سے زیادہ ریٹنگز اور برقی خصوصیات
| Core Architecture | PIC18 8-bit RISC |
| Maximum CPU Clock | 40 MHz |
| Program Memory (Flash) | 12 KB (6K x 16) |
| RAM | 640 bytes |
| EEPROM | 256 bytes |
| Supply Voltage (VDD) | 4.2 V to 5.5 V |
| User I/O Pins | 36 |
| ADC | 10-bit, 8 channels |
| PWM Outputs | 2 dedicated motor-control PWM channels |
| Motor Control Kernel | Yes (single-phase induction motor control focus) |
| Self-Programming | Yes (Flash) |
| In-Circuit Debug (ICD) | Yes |
| آپریٹنگ درجہ حرارت | -40 C to +85 C (Industrial, 'I' suffix) |
| پیکیج | TQFP-44 (PT), 10x10 mm, surface mount |
| ماؤنٹنگ ٹائپ | Surface Mount, gull-wing |
| RoHS | Compliant |
PIC18F4439-I/PT پن کنفیگریشن
| پن 1 | RC0/T1OSO/T1CKI — I/O port C bit 0 / Timer1 oscillator output / Timer1 clock input |
| پن 2 | RC1/T1OSI/CCP2 — I/O port C bit 1 / Timer1 oscillator input / CCP2 input/output |
| پن 3 | RC2/CCP1 — I/O port C bit 2 / CCP1 PWM output |
| پن 4 | RC3/SCK/SCL — I/O port C bit 3 / SPI SCK / I2C SCL |
| پن 5 | RC4/SDI/SDA — I/O port C bit 4 / SPI data in / I2C data |
| پن 6 | RC5/SDO — I/O port C bit 5 / SPI data out |
| پن 7 | RC6/TX/CK — I/O port C bit 6 / USART TX / clock |
| پن 8 | RC7/RX/DT — I/O port C bit 7 / USART RX / data |
| پن 9 | OSC1/CLKI/RA7 — Oscillator crystal input / external clock in / port A bit 7 |
| پن 10 | OSC2/CLKO/RA6 — Oscillator crystal output / clock out / port A bit 6 |
| پن 11 | MCLR/VPP/RE3 — Master clear reset / programming voltage / port E bit 3 |
| پن 12 | VDD — Power supply (4.2 V to 5.5 V) |
| پن 13 | VSS — Ground reference |
| پن 14 | RB7/PGD — I/O port B bit 7 / ICD programming data |
| پن 15 | RB6/PGC — I/O port B bit 6 / ICD programming clock |
| پن 16 | RB5 — I/O port B bit 5 |
| پن 17 | RB4 — I/O port B bit 4 |
| پن 18 | RB3/CCP2 — I/O port B bit 3 / CCP2 channel |
| پن 19 | RB2/PWM1 — I/O port B bit 2 / Motor-control PWM output 1 |
| پن 20 | RB1/PWM2 — I/O port B bit 1 / Motor-control PWM output 2 |
| پن 21 | RB0/INT0 — I/O port B bit 0 / external interrupt 0 |
| پن 22 | VDD — Power supply (4.2 V to 5.5 V) |
| پن 23 | VSS — Ground reference |
| پن 24 | RA0/AN0 — I/O port A bit 0 / ADC analog input 0 |
| پن 25 | RA1/AN1 — I/O port A bit 1 / ADC analog input 1 |
| پن 26 | RA2/AN2/VREF- — I/O port A bit 2 / ADC analog input 2 / VREF- |
| پن 27 | RA3/AN3/VREF+ — I/O port A bit 3 / ADC analog input 3 / VREF+ |
| پن 28 | RA4/AN4/T0CKI — I/O port A bit 4 / ADC analog input 4 / Timer0 clock in |
| پن 29 | RA5/AN5/SS — I/O port A bit 5 / ADC analog input 5 / SPI slave select |
| پن 30 | RE0/AN6 — I/O port E bit 0 / ADC analog input 6 |
| پن 31 | RE1/AN7 — I/O port E bit 1 / ADC analog input 7 |
| پن 32 | RE2/CS — I/O port E bit 2 / chip select |
| پن 33 | RD0 — I/O port D bit 0 |
| پن 34 | RD1 — I/O port D bit 1 |
| پن 35 | RD2 — I/O port D bit 2 |
| پن 36 | RD3 — I/O port D bit 3 |
| پن 37 | RD4 — I/O port D bit 4 |
| پن 38 | RD5 — I/O port D bit 5 |
| پن 39 | RD6 — I/O port D bit 6 |
| پن 40 | RD7 — I/O port D bit 7 |
| پن 41 | AVDD — Analog supply (4.2 V to 5.5 V) |
| پن 42 | AVSS — Analog ground reference |
| پن 43 | NC — Not connected (per datasheet) |
| پن 44 | NC — Not connected (per datasheet) |
عام استعمالات
PIC18F4439-I/PT کے لیے موزوں ہے 6 ایپلیکیشنs: Single-Phase Induction Motor Drive, Appliance Fan / Pump Controller, Switched-Mode Power Supply (SMPS) Controller, Variable-Frequency Drive (VFD) Modem Stage, HVAC Damper and Damper Actuator, Industrial Automation Remote I/O Module.
Single-Phase Induction Motor Drive
The PIC18F4439-I/PT is the silicon that Microchip designed for single-phase induction motor control, so this is its native application. Its integrated motor-control PWM kernel with dedicated time-base and edge/center-aligned modes produces the variable-frequency switching demanded by V/Hz torque profiles, while the 8-channel 10-bit ADC samples shunt-current and back-EMF feedback inside the firmware interrupt. The 12 KB Flash and 640 bytes of RAM are sized for state-machine commutation, PI loop, and small diagnostic UIs. Place 100 nF ceramic bypass caps adjacent to each VDD/VSS pair and keep high-current switching traces away from AVSS/AVDD traces to avoid ADC crosstalk.
تجویز کردہ
Appliance Fan / Pump Controller
Ceiling fans, refrigerator compressors, and small circulation pumps run directly from the PIC18F4439-I/PT thanks to its industrial temperature grade and 36 user I/O lines. The 40 MHz PIC18 core provides enough MIPS to handle closed-loop RPM regulation via the input-capture module and quadrature-encoder interface, while the hardware PWM drives TRIAC or IGBT stages with deterministic dead-band control. With low BOM count - MCU, gate driver, and a handful of passives - the design fits behind the wall plate. Self-programming Flash enables in-field firmware updates for fan curves and energy-saving modes.
تجویز کردہ
Switched-Mode Power Supply (SMPS) Controller
The PIC18F4439-I/PT's high-speed 10-bit ADC and motor-control PWM kernel translate naturally into digital SMPS control where the firmware actively regulates output voltage and current with peak-current-mode or average-current-mode techniques. The 40 MHz core delivers 10 MIPS, allowing control loops at typical 50-200 kHz switching frequencies when compiled efficiently with the C18 or XC8 toolchain. Brown-out reset and the 4.2 V minimum supply keep the regulator alive during AC input dropouts, while 256 bytes of EEPROM store trim and calibration constants. Isolation is maintained with the MCP2120 UART-to-optical interface.
تجویز کردہ
Variable-Frequency Drive (VFD) Modem Stage
Use the PIC18F4439-I/PT as the auxiliary control stage for small variable-frequency drives that need precise PWM and quadrature feedback. The microcontroller's dedicated quadrature encoder interface delivers reliable rotor-position tracking when paired with incremental encoders, while the 36 I/O pins can drive indicator LEDs, fault relays, and a CAN/RS-485 interface. The industrial temperature range matches factory-floor environments with elevated ambient. Add the MCP2561 CAN transceiver for networking and the MCP1700 LDO to derive clean 3.3 V for any host MCUs in the system.
تجویز کردہ
HVAC Damper and Damper Actuator
Heating, ventilation, and air-conditioning damper actuators are a strong fit for the PIC18F4439-I/PT because they need precision PWM and encoder feedback in a small, sealed enclosure. The 10-bit ADC measures absolute position through a rotary potentiometer and drives a brushed DC motor through an H-bridge, while the 12 KB Flash accommodates slow diagnostic loops and Modbus-style network slaves. Long-term parameter storage uses the on-chip EEPROM, so trim values survive power cycles. Industrial-grade temperature and in-circuit debug simplify qualification.
تجویز کردہ
Industrial Automation Remote I/O Module
The PIC18F4439-I/PT is also used as the supervisory microcontroller in industrial remote I/O modules that fan-out digital inputs and relay outputs over RS-485 or CANopen. Its 36 I/O pins can drive up to 36 external channels in groups multiplexed through the MCP23S17, while the 10-bit ADC reads 4-20 mA analog process signals through op-amp level shifters. The ICD port supports in-circuit debug during commissioning, and self-programming Flash allows field firmware upgrades through Modbus bootloader routines. A watchdog timer and brown-out reset keep the module latched in safe state during industrial transients.
تجویز کردہ
تجویز کردہ پروڈکٹس کا خلاصہ
کے لیے انجینئرنگ ریفرنس ڈیٹا PIC18F4439-I/PT — موازنہ، ڈیزائن رہنمائی، اور تعمیل کی معلومات۔
انتخاب کی گائیڈ
متبادلات کے ساتھ موازنہ
| پیرامیٹر | یہ پروڈکٹ | PIC18F4439-E/PT | PIC18F4431-I/PT | PIC18F4331-I/PT |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-44 (PT) | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same |
| CPU Clock | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| Program Flash | 12 KB | 12 KB | 16 KB | 8 KB |
| RAM | 640 bytes | 640 bytes | 768 bytes | 256 bytes |
| EEPROM | 256 bytes | 256 bytes | 256 bytes | 256 bytes |
| Operating Temperature | -40 C to +85 C | -40 C to +125 C | -40 C to +85 C | -40 C to +85 C |
| Motor-Control PWM Kernel | Yes (single-phase focus) | Yes (single-phase focus) | Yes (general-purpose family) | Yes (motor-control focus) |
| ADC Channels | 8 channels, 10-bit | 8 channels, 10-bit | 9 channels, 10-bit | 9 channels, 10-bit |
| 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 |
اہم امتیازی خصوصیات
- Dedicated single-phase motor-control PWM kernel on-chip (بمقابلہPIC18F4431-I/PT)
- Industrial-grade temperature rating included as standard (بمقابلہPIC18F4439-E/PT)
- Surface-mount TQFP-44 footprint for compact appliance designs (بمقابلہPIC18F4439-I/P (40-pin PDIP))
ڈیزائن نوٹس
Place a 100 nF ceramic bypass capacitor next to each VDD/VSS pin pair and a single 10 uF or greater bulk tantalum or ceramic cap on the supply rail. For motor-control layouts where high-current traces can return through the analog ground, split AVSS and VSS only at one point and use a star ground tying the two together near the regulator. The PIC18F4439-I/PT operates from 4.2 V to 5.5 V; supply spikes above absolute maximum 7.5 V on VDD will permanently damage the part.
On the TQFP-44 layout, route the analog AVSS/AVDD pair through a ferrite bead to the digital rail so that high-frequency motor-switching noise cannot couple into ADC samples. Keep the OSC1/OSC2 traces short (under 10 mm) and surrounded by a ground guard ring if the board will operate in high EMI environments. If using a high-speed crystal, place the load caps symmetrically and provide a ground pour under the crystal to suppress coupling. These measures will keep ADC reference noise below 1 LSB at full 40 MHz operation.
Do not operate the PIC18F4439-I/PT above 5.5 V; an external 5 V LDO such as MCP1702 from a 12-24 V bus is preferred over raw 5 V regulators in appliance designs. When using the In-Circuit Debugger port (RB6/RB7), configure the application firmware to release the PGC/PGD pins immediately or debug-from-reset will not connect. Finally, the 12 KB Flash is divided into self-programming and application regions per CONFIG settings - leave at least 128 bytes of buffer or self-programming will fail with BOR.
تعمیل کی معلومات
Industrial -40 C to +85 C operating range. RoHS and REACH compliant per Microchip product declarations.
