PIC18F4431-I/P - 8-bit MCU, 16KB Flash, 40MHz, 40-PDIP | Microchip
MPN: PIC18F4431-I/P ✓ فعالPIC18F4431-I/P نمای کلی
A PIC18F microcontroller is an 8-bit Harvard-architecture MCU built around an enhanced RISC core with a modified instruction set that retains code compatibility with the earlier PIC16 family while adding linear memory, 16-bit instructions, and a hardware multiplier. It sits in the broader taxonomy: microcontroller -> embedded processor -> semiconductor. PIC18F parts are typically used in applications that need more compute, RAM, and peripherals than PIC16F MCUs but do not justify a 16-bit dsPIC33 or 32-bit ARM Cortex-M0 device.
Key features include a 40 MHz internal/external oscillator block, two 8-bit timers plus three 16-bit timers, two capture/compare/PWM modules, an enhanced USART, an MSSP (SPI/I2C) port, a 10-bit A/D with up to 9 channels, and a parallel slave port. The integrated Power Control PWM module provides up to six PWM channels with hardware fault inputs, which is unusual for a general-purpose 8-bit MCU and makes the PIC18F4431 especially suited to motor and motion control loops. On-chip debug and In-Circuit Serial Programming (ICSP) are supported through two dedicated pins.
The device operates across an industrial temperature range of -40C to +85C (denoted by the 'I' suffix) and uses the standard 40-pin PDIP pinout shared with several other PIC18F44xx parts. Compliance includes RoHS status per Microchip's product page and standard PIC18F nanoWatt low-power operating modes such as Sleep, Idle, and oscillator switching.
Typical applications include BLDC and PMSM motor control (the Power Control PWM and 9-channel 10-bit ADC are tuned for closed-loop FOC), HVAC fan and pump control, and industrial sensor conditioning. The 5V-tolerant digital I/O simplify interfacing to legacy 5 V analog front-ends and opto-isolated gate drivers.
When designing with this device, pay attention to the ICP/ICSP pin allocation: PGD/PGC must remain accessible for in-circuit programming and debugging. Decouple VDD/VSS pairs locally and follow Microchip's PIC18F4531/4431 errata guidance for the Power Control PWM module startup sequence.
This page synthesizes verified distributor pricing, parametric alternatives from the same PIC18F family, and design notes not consolidated on any single distributor page.
جایگزین‌های drop-in برای PIC18F4431-I/P — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
گونه‌ها در این سری
مدل‌های هم‌سری که جایگزین مستقیم هستند برای PIC18F4431-I/P (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در Package, Operating Temperature, Communication, Timers, ADC.
PIC18F4531-I/P
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
PIC18F4439-I/P
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
PIC18F46K22-I/P
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18F452-I/P
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18F442-I/P
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18F4410-I/P
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18F4320-I/P
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18F4431-I/P حداکثر مقادیر مجاز و مشخصات الکتریکی
| Core | PIC18F 8-bit RISC |
| Program Memory | 16 KB (8K x 16) Flash |
| RAM | 768 bytes |
| EEPROM | 256 bytes |
| Maximum CPU Speed | 40 MHz |
| Supply Voltage (VDD) | 4.2 V to 5.5 V |
| I/O Pins | 34 (36 per digchip datasheet; 34 functional per Microchip datasheet) |
| A/D Converter | 10-bit, up to 9 channels |
| PWM Channels | Up to 6 (Power Control PWM module) |
| Timers | 2 x 8-bit, 3 x 16-bit |
| Communication | 1 x EUSART, 1 x MSSP (SPI/I2C) |
| بسته‌بندی | 40-pin PDIP (DIP-40) |
| دمای کاری | -40C to +85C (Industrial) |
| نوع نصب | Through-Hole |
| Power-Saving Modes | nanoWatt (Sleep, Idle, Run modes) |
| ICSP/ICD | Yes (PGD/PGC pins) |
| RoHS | Compliant (per Microchip product page) |
| وضعیت چرخه عمر | Active |
پیکربندی پین PIC18F4431-I/P
| پین 1 | /MCLR — Master Clear (reset) input, active low |
| پین 2 | RA0 — PORTA bit 0 / analog AN0 |
| پین 3 | RA1 — PORTA bit 1 / analog AN1 |
| پین 4 | RA2 — PORTA bit 2 / analog AN2 / VREF- |
| پین 5 | RA3 — PORTA bit 3 / analog AN3 / VREF+ |
| پین 6 | RA4 — PORTA bit 4 / analog AN4 |
| پین 7 | RA5 — PORTA bit 5 / analog AN5 / digital I/O |
| پین 8 | RE0 — PORTE bit 0 / digital I/O |
| پین 9 | RE1 — PORTE bit 1 / digital I/O |
| پین 10 | RE2 — PORTE bit 2 / digital I/O |
| پین 11 | VDD — Positive supply voltage |
| پین 12 | VSS — Ground reference |
| پین 13 | OSC1 — Crystal/clock input |
| پین 14 | OSC2 — Crystal/clock output |
| پین 15 | RC0 — PORTC bit 0 |
| پین 16 | RC1 — PORTC bit 1 |
| پین 17 | RC2 — PORTC bit 2 |
| پین 18 | RC3 — PORTC bit 3 |
| پین 19 | RD0 — PORTD bit 0 |
| پین 20 | RD1 — PORTD bit 1 |
| پین 21 | RD2 — PORTD bit 2 |
| پین 22 | RD3 — PORTD bit 3 |
| پین 23 | RC4 — PORTC bit 4 / USB D- |
| پین 24 | RC5 — PORTC bit 5 / USB D+ |
| پین 25 | RC6 — PORTC bit 6 / TX |
| پین 26 | RC7 — PORTC bit 7 / RX |
| پین 27 | RD4 — PORTD bit 4 |
| پین 28 | RD5 — PORTD bit 5 / P1B |
| پین 29 | RD6 — PORTD bit 6 / P1C |
| پین 30 | RD7 — PORTD bit 7 / P1D |
| پین 31 | VSS — Ground reference |
| پین 32 | VDD — Positive supply voltage |
| پین 33 | RB0 — PORTB bit 0 / INT0 |
| پین 34 | RB1 — PORTB bit 1 / INT1 |
| پین 35 | RB2 — PORTB bit 2 / INT2 |
| پین 36 | RB3 — PORTB bit 3 / PGM |
| پین 37 | RB4 — PORTB bit 4 |
| پین 38 | RB5 — PORTB bit 5 / PGD |
| پین 39 | RB6 — PORTB bit 6 / PGC |
| پین 40 | RB7 — PORTB bit 7 |
کاربردهای معمول
PIC18F4431-I/P مناسب است برای 6 کاربردs: BLDC Motor Control, Industrial Sensor Conditioning & PWM Drive, HVAC Fan and Pump Control, Uninterruptible Power Supply (UPS) Control, Automotive Body Control Modules, Smart Sensor Hubs.
BLDC Motor Control
The PIC18F4431-I/P's 6-channel Power Control PWM with hardware fault inputs and complementary outputs is purpose-built for three-phase BLDC/PMSM commutation. With a 40 MHz oscillator delivering 10 MIPS, the firmware can execute a sensorless or Hall-sensor FOC loop with sufficient bandwidth for the PWM reload period. The 9-channel 10-bit A/D samples phase currents via op-amp sense chains, and the 4.2-5.5 V supply directly powers 5 V gate drivers like the IR2104. Compared to using PIC18F452 + external PWM logic, this part eliminates an entire analog comparator dead-band circuit.
پیشنهادی
Industrial Sensor Conditioning & PWM Drive
For industrial sensor signal conditioning, the PIC18F4431-I/P pairs its 10-bit A/D (9 channels, 5 V tolerant) with up to 6 PWM channels for excitation or proportional control outputs. Industrial 4-20 mA loops and 0-10 V analog outputs can be generated from the PWM filtered through op-amp buffers, simplifying BOM by combining MCU and DAC functions. The industrial -40C to +85C rating and nanoWatt power management suit always-on PLC input modules.
پیشنهادی
HVAC Fan and Pump Control
HVAC variable-speed fan and pump controllers benefit from the PIC18F4431-I/P's Power Control PWM for AC induction or BLDC motor commutation and the nanoWatt Sleep mode for overnight standby. The 5 V supply matches common HVAC control board rails, and the industrial temperature range handles rooftop and basement enclosures. The USART supports BACnet MS-TP or Modbus RTU communication with the building automation system, while the MSSP port can drive a local I2C sensor cluster.
پیشنهادی
Uninterruptible Power Supply (UPS) Control
In small-line UPS or DC microgrid battery management, the PIC18F4431-I/P samples battery voltage and current through its 10-bit A/D, drives a half-bridge inverter via the Power Control PWM, and coordinates state-of-charge through timer-based Coulomb counting. The 34 I/O lines are enough to manage relays, status LEDs, and front-panel buttons without an I/O expander. Compared to discrete logic implementations, the integrated PWM with fault inputs cuts BOM cost and improves safety.
پیشنهادی
Automotive Body Control Modules
Although not AEC-Q100 qualified, the PIC18F4431-I/P appears in non-safety automotive subsystems such as body computers, seat controllers, and HVAC modules where 5 V operation and the Power Control PWM drive small DC motors. The EUSART enables LIN slave communication to a central gateway, while the MSSP drives I2C sensors. For AEC-Q100 applications, choose the PIC18F46K22-I/P or PIC18F67K40 family that share the same peripheral set.
پیشنهادی
Smart Sensor Hubs
The PIC18F4431-I/P integrates a 9-channel A/D, two serial ports, and up to 6 PWM outputs in a single 40-pin PDIP, making it a compact hub for industrial sensor arrays. Combined with external SPI or I2C sensors, the MCU can sample multiple transducers, run local averaging, and forward processed data over Modbus. The 40-pin PDIP through-hole package simplifies hand-soldered prototype assembly and field-replaceable modules.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای PIC18F4431-I/P — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | PIC18F4531-I/P | PIC18F4439-I/P | PIC18F46K22-I/P | PIC18F452-I/P | PIC18F442-I/P | PIC18F4410-I/P | PIC18F4320-I/P |
|---|---|---|---|---|---|---|---|---|
| Package | DIP-40 (PDIP) | DIP-40 (PDIP) | DIP-40 (PDIP) | DIP-40 (PDIP) | DIP-40 (PDIP) | DIP-40 (PDIP) | DIP-40 (PDIP) | DIP-40 (PDIP) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash (KB) | 16 | 32 | 16 | 64 | 32 | 16 | 16 | 8 |
| RAM (bytes) | 768 | 1536 | 768 | 3896 | 1536 | 768 | 768 | 256 |
| Max CPU Speed | 40 MHz | 40 MHz | 40 MHz | 64 MHz | 40 MHz | 40 MHz | 16 MHz | 40 MHz |
| PWM Channels | 6 (Power Control PWM) | 6 (Power Control PWM) | 6 (Power Control PWM) | 5 (CCP/ECCP) | 2 (CCP) | 2 (CCP) | 1 (CCP) | 2 (CCP) |
| A/D Channels | 9 (10-bit) | 11 (10-bit) | 9 (10-bit) | 14 (10-bit) | 8 (10-bit) | 4 (10-bit) | 8 (10-bit) | 8 (10-bit) |
| VDD Range | 4.2 to 5.5 V | 4.2 to 5.5 V | 4.2 to 5.5 V | 1.8 to 5.5 V | 4.2 to 5.5 V | 4.2 to 5.5 V | 2.0 to 5.5 V | 4.2 to 5.5 V |
تفاوت‌های کلیدی
- Integrated Power Control PWM with hardware fault inputs (در مقابلPIC18F452-I/P)
- Larger A/D channel count (در مقابلPIC18F442-I/P)
- Drop-in upgrade path with 2x memory (در مقابلPIC18F4531-I/P)
- 40 MHz performance for 10 MIPS throughput (در مقابلPIC18F4410-I/P)
یادداشت‌های طراحی
Place a 100 nF decoupling capacitor within 5 mm of each VDD/VSS pair (the PIC18F4431 has two VDD pins at 11/32 and two VSS pins at 12/31). Add a bulk 10 uF electrolytic at the board supply input. Keep the trace between pins 13/14 (OSC1/OSC2) short, and route the crystal case to a quiet ground island. PGD/PGC traces (RB5/RB6) must be routed away from PWM outputs to avoid debug-noise coupling.
The Power Control PWM module has dedicated configuration registers that must be unlocked in a specific sequence before writing; failure to follow the sequence locks the registers and prevents PWM output. Refer to Microchip application note AN1079 for the unlock procedure. Also note that the CCP pins (RC1/RC2) are remapped when the Power Control PWM is active - do not assume legacy CCP behavior.
The /MCLR pin (1) requires a 10 kohm pull-up to VDD; if ICSP is used, route the /MCLR/VPP trace to the programming connector without buffer circuits. In high-noise motor-drive environments, add a 100 nF cap from /MCLR to VSS and a TVS diode (e.g., PESD5V0L1BA) to clamp ESD events. Verify that the /MCLR trace is not adjacent to the PWM outputs to prevent injected faults from triggering resets.
اطلاعات انطباق
RoHS and lead-free per Microchip product page. AEC-Q100 not applicable - choose PIC18F family K-series for automotive. Conflict minerals compliance per Microchip public CMRT filings.
