PIC18F4431-E/PT Microchip Integrated Circuit (Quad Flat Packages) In Stock
Microchip PIC18F4431-E/PT is an 8-bit PIC18 microcontroller optimized for motor control, with 16KB Flash, 768B RAM, and 4 PWM channels in TQFP-44 package. Operates at up to 40 MHz with a 10-bit ADC and dedicated power control PWM module. Available in stock with worldwide shipping at competitive pricing.
- Manufacturer
- Microchip
- Package
- Quad Flat Packages
- Pin Count
- 44
- Lifecycle
- ACTIVE
- Datasheet
- PIC18F4431-E/PT Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Dedicated Power Control PWM (PCPWM) module with 4 complementary output pairs for 3-phase motor drive and H-bridge control up to 40 MHz
- 10-bit ADC with up to 13 input channels and auto-conversion trigger from PWM events for closed-loop motor current sensing
- 16KB Flash and 768B SRAM with 8-bit PIC18 enhanced core running at 40 MHz for real-time motor control algorithms
- 44-TQFP package with 36 I/O pins supports encoder inputs, fault signals, serial diagnostic interfaces, and gate-drive outputs simultaneously
Applications
The PIC18F4431-E/PT is specifically designed for 3-phase brushless DC motor drives, AC induction motor inverters, and switched-mode power supplies that require hardware-coordinated PWM outputs with dead-time insertion. Its Power Control PWM module generates complementary high/low gate signals for 6-switch inverter topologies, reducing CPU overhead and enabling switching frequencies above 10 kHz with precise dead-band control. The integrated 10-bit ADC with PWM-triggered conversion supports sensorless current-sampling techniques used in field-oriented control and voltage-mode PWM control loops.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | TQFP-44 |
| Factory Lead Time | 6Weeks |
| YTEOL | 8 |
| Has ADC | YES |
| Bit Size | 8 |
| Boundary Scan | NO |
| CPU Family | PIC18 |
| Clock Frequency-Max | 40MHz |
| DAC Channels | NO |
| DMA Channels | NO |
| Format | FIXED POINT |
| Integrated Cache | NO |
| JESD-30 Code | S-PQFP-G44 |
| JESD-609 Code | e3 |
| Low Power Mode | YES |
| Number of External Interrupts | 3 |
| Number of I/O Lines | 36 |
| Number of Serial I/Os | 1 |
| Number of Timers | 6 |
| On Chip Data RAM Width | 8 |
| On Chip Program ROM Width | 8 |
| PWM Channels | YES |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TQFP44,.39SQ,31 |
| Package Shape | SQUARE |
| Package Style | FLATPACK, THIN PROFILE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| RAM (bytes) | 768 |
| ROM (words) | 16384 |
| ROM Programmability | FLASH |
| Screening Level | TS 16949 |
| Speed | 40MHz |
| Supply Current-Max | 15mA |
| Supply Voltage-Max | 5.5V |
| Supply Voltage-Min | 4.2V |
| Supply Voltage-Nom | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.8mm |
| Terminal Position | QUAD |
| Time@Peak Reflow Temperature-Max (s) | 40 |
| uPs/uCs/Peripheral ICs Type | MICROCONTROLLER, RISC |
| Package | Quad Flat Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 3 |
| ECCN | EAR99 |
| HTS Code | 8542.31.00.01 |
| Country of Origin | Philippines, Thailand |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for PIC18F4431-E/PT:
RISC Microcontroller, 8-Bit, FLASH, PIC18 CPU, 40MHz, CMOS, PQFP44
RISC Microcontroller, 8-Bit, FLASH, PIC18 CPU, 40MHz, CMOS, PQFP44
RISC Microcontroller, 8-Bit, FLASH, PIC18 CPU, 40MHz, CMOS, PQFP44
RISC Microcontroller, 8-Bit, FLASH, PIC18 CPU, 40MHz, CMOS, PQFP44
RISC Microcontroller, 8-Bit, FLASH, PIC18 CPU, 40MHz, CMOS, PQFP44
RISC Microcontroller, 8-Bit, FLASH, PIC18 CPU, 40MHz, CMOS, PQFP44
RISC Microcontroller, 8-Bit, FLASH, PIC18 CPU, 40MHz, CMOS, PQFP44
Frequently Asked Questions
What motor control PWM features distinguish PIC18F4431-E/PT from a standard PIC18 general-purpose MCU?
The PIC18F4431-E/PT includes a dedicated Power Control PWM (PCPWM) module with 4 complementary output pairs, hardware dead-time insertion, and fault detection inputs not found on standard PIC18 devices. This module generates the 6 gate-drive signals required for a 3-phase inverter at switching frequencies up to 40 MHz timer clock, reducing CPU interrupt overhead versus software PWM generation.
At what maximum clock frequency does PIC18F4431-E/PT operate and what supply voltage is required?
The PIC18F4431-E/PT reaches its maximum clock frequency of 40 MHz when supplied from 4.2V to 5.5V. At lower supply voltages in the extended range down to 4.2V, operation at 40 MHz is maintained. The extended industrial temperature variant (E suffix) guarantees operation from -40°C to 125°C junction temperature across this voltage and frequency range.
How many ADC input channels does PIC18F4431-E/PT provide and how are they synchronized with the PWM module?
The PIC18F4431-E/PT integrates a 10-bit successive-approximation ADC with up to 13 multiplexed input channels. A dedicated PWM auto-conversion trigger allows the ADC to sample current and voltage exactly at the midpoint of the PWM period, implementing center-aligned current sampling for 3-phase motor control without CPU intervention, achieving conversion timing accuracy within 100 ns of the PWM reference.
For a 3-phase BLDC motor drive design, how does the TQFP-44 package of PIC18F4431-E/PT support all required signal connections?
The 44-TQFP package provides 36 available I/O pins within a 10 mm x 10 mm footprint. A 3-phase inverter design uses 6 pins for PWM gate outputs, 3 pins for current-sense ADC inputs, 2 pins for encoder quadrature channels, and 1 pin for a hardware fault input, consuming 12 pins total and leaving 24 pins available for serial communication, LED indicators, user interface, and auxiliary I/O.
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