PIC18LF2431-I/MM - 8-bit 40MHz 16KB Flash MCU 28-QFN | Microchip
MPN: PIC18LF2431-I/MM ✓ فعالPIC18LF2431-I/MM جائزہ
A microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, working RAM, and peripheral interfaces. The PIC18F family uses a modified Harvard RISC architecture with 16-bit opcodes and 8-bit data, supported by 77 single-word instructions. Within the broader taxonomy, this part belongs to microcontrollers -> 8-bit MCUs -> embedded controllers -> semiconductors. The 'LF' low-voltage variant enables battery-powered or USB bus-powered designs, while the standard PIC18F2431 version targets 4.2 V to 5.5 V systems.
Key features include 16 KB Flash program memory (8K x 16 words), 768 bytes SRAM, 256 bytes EEPROM, 22 I/O pins, an enhanced Capture/Compare/PWM module with up to 4 PWM channels and configurable resolution up to 14 bits, a 10-bit multi-channel A/D converter, two analog comparators, USART, MSSP (SPI/I2C), and nanoWatt Technology with multiple idle/sleep modes for sub-µA standby current. The high-performance PWM block includes programmable dead-time control, center-aligned or edge-aligned modes, and dedicated fault input pins for safe motor commutation.
The device is built on a CMOS process with a 16-bit instruction word and 8-bit data path, executing most instructions in one cycle (100 ns at 40 MHz oscillator). The high-endurance Flash supports 100K erase/write cycles typical, and EEPROM supports 1M cycles. This combination of deterministic execution, integrated motor-control peripherals, and wide voltage range makes the PIC18LF2431 well-suited for closed-loop BLDC, PMSM, and brushed-DC control as well as lighting ballasts and switched-mode power supplies.
Typical applications include brushless DC (BLDC) motor control, switched-mode power supplies (SMPS), uninterruptible power supplies (UPS), HVAC fan/blower control, ceiling fans and pumps, LED lighting ballasts, and industrial drives that require high-resolution PWM and ADC feedback in a compact footprint.
When designing with this part, choose the 'LF' variant (2.0 V to 5.5 V) for USB or battery-powered operation, or the standard PIC18F2431 (4.2 V to 5.5 V) for fixed 5 V industrial rails. Provide a clean VDD decoupling network (10 µF + 100 nF), respect the exposed-pad (EP) thermal/ground connection, and verify that the chosen oscillator mode and PLL configuration stay within the 40 MHz maximum operating frequency.
This page synthesizes distributor pricing, drop-in same-family alternatives (PIC18LF2331-I/MM, PIC18F2431-I/MM), parametric comparison, and practical design notes not found in the bare datasheet, giving procurement and engineering teams an actionable single-source reference.
کے لیے ڈراپ اِن متبادل PIC18LF2431-I/MM — 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 PIC18LF2431-I/MM (یکساں فارم فیکٹر اور فٹ پرنٹ) — میں مختلف Package, Operating Temperature, Core Architecture, Mounting Type, Timers.
PIC18LF2331-I/MM
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC18F2431-I/MM
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
PIC18LF2331T-I/MM
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC18LF2431-I/SP
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC18F2331-I/MM
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC18LF2431-I/MM زیادہ سے زیادہ ریٹنگز اور برقی خصوصیات
| Family | PIC PIC® 18F |
| Core | 8-bit RISC (modified Harvard) |
| Program Memory (Flash) | 16 KB (8K x 16) |
| RAM | 768 bytes |
| EEPROM | 256 bytes |
| Maximum CPU Speed | 40 MHz (10 MIPS) |
| Operating Voltage (Vdd) | 2.0 V to 5.5 V |
| I/O Pins | 22 |
| ADC | 10-bit, multi-channel |
| PWM Channels | Up to 4, enhanced 14-bit |
| Analog Comparators | 2 |
| UART/USART | 1 x USART (EUSART) |
| SPI / I2C (MSSP) | 1 x MSSP (SPI / I2C) |
| Timers | 8-bit and 16-bit (multiple) |
| پیکیج | 28-pin QFN-S (6x6 mm) with EP |
| ماؤنٹنگ ٹائپ | Surface Mount (no-lead) |
| آپریٹنگ درجہ حرارت | -40°C to +85°C (Industrial) |
| RoHS / Lead-Free | Yes (lead-free QFN) |
| Instruction Set | 77 single-word instructions |
PIC18LF2431-I/MM پن کنفیگریشن
| پن 1 | MCLR — Reset input (active low); external 10 kΩ pull-up to Vdd |
| پن 2 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| پن 3 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| پن 4 | RA2/AN2/VREF- — PORTA bit 2 / analog input 2 / ADC Vref- |
| پن 5 | RA3/AN3/VREF+ — PORTA bit 3 / analog input 3 / ADC Vref+ |
| پن 6 | RA4 — PORTA bit 4 (digital only, open-drain) |
| پن 7 | RA5 — PORTA bit 5 |
| پن 8 | Vss — Ground reference |
| پن 9 | OSC1/CLKI — Crystal oscillator input / external clock |
| پن 10 | OSC2/CLKO — Crystal oscillator output / clock output |
| پن 11 | RC0/T1OSO — PORTC bit 0 / Timer1 oscillator output |
| پن 12 | RC1/T1OSI — PORTC bit 1 / Timer1 oscillator input |
| پن 13 | RC2/CCP1 — PORTC bit 2 / enhanced CCP1 output |
| پن 14 | RC3 — PORTC bit 3 |
| پن 15 | RC4 — PORTC bit 4 |
| پن 16 | RC5 — PORTC bit 5 |
| پن 17 | RC6/TX/CK — PORTC bit 6 / USART TX / clock |
| پن 18 | RC7/RX/DT — PORTC bit 7 / USART RX / data |
| پن 19 | Vss — Ground reference |
| پن 20 | Vdd — Positive supply (2.0 V to 5.5 V) |
| پن 21 | RB0/INT0 — PORTB bit 0 / external interrupt 0 |
| پن 22 | RB1/INT1 — PORTB bit 1 / external interrupt 1 |
| پن 23 | RB2 — PORTB bit 2 |
| پن 24 | RB3 — PORTB bit 3 |
| پن 25 | RB4 — PORTB bit 4 |
| پن 26 | RB5 — PORTB bit 5 |
| پن 27 | RB6/PGC — PORTB bit 6 / ICSP clock |
| پن 28 | RB7/PGD — PORTB bit 7 / ICSP data |
عام استعمالات
PIC18LF2431-I/MM کے لیے موزوں ہے 6 ایپلیکیشنs: Brushless DC (BLDC) Motor Control, Switched-Mode Power Supplies (SMPS), HVAC Fan and Blower Control, Ceiling Fans and Pumps, LED Lighting Ballasts, Uninterruptible Power Supplies (UPS).
Brushless DC (BLDC) Motor Control
The PIC18LF2431-I/MM is purpose-built for closed-loop BLDC and PMSM motor control. Its enhanced Capture/Compare/PWM (ECCP) module provides up to 4 PWM channels with 14-bit resolution, programmable dead-time control, center- or edge-aligned modes, and dedicated PWM fault input pins that disable outputs in microseconds - a hard requirement for safe motor commutation. The 10-bit multi-channel ADC samples back-EMF or phase current synchronously to the PWM, while two on-chip analog comparators support hardware overcurrent protection. Running at 40 MHz (10 MIPS) the core executes PI/sensorless-control loops well under 100 µs. The wide 2.0-5.5 V Vdd range allows USB-powered development rigs and 3.3 V logic integration. Source: PIC18F2331/2431 datasheet (Microchip DS39616).
تجویز کردہ
Switched-Mode Power Supplies (SMPS)
The PIC18LF2431-I/MM is widely used as the control brain in digitally controlled SMPS. The high-speed 10-bit ADC samples the output voltage and current sense signals at sub-microsecond rates, while the 14-bit ECCP PWM drives the main power MOSFET at deterministic frequencies up to 1 MHz. The 40 MHz core (10 MIPS) handles average-current-mode or peak-current-mode control loops in firmware. The 2.0-5.5 V wide-voltage LF process lets the same firmware run on 3.3 V USB or 5 V rails, and nanoWatt modes lower standby consumption for ErP/ENERGY STAR compliance. Use PIC18LF2431 with a TC110/TC107 supervisor and TC642 fan controller for a complete ATX/auxiliary power design.
تجویز کردہ
HVAC Fan and Blower Control
HVAC fans and blowers demand quiet variable-speed operation, accurate tachometer feedback, and reliable fault handling. The PIC18LF2431-I/MM delivers all three via its enhanced 14-bit PWM for smooth motor commutation, the Input Capture (IC) module for RPM measurement on a Hall sensor or back-EMF, and the dedicated PWM fault pin that latches outputs within one cycle on stall or overcurrent. The LF (2.0-5.5 V) supply range simplifies 24 V → 3.3 V HVAC bus designs, and 16 KB Flash fits typical BLDC + display + diagnostics firmware. Industrial -40 to +85 °C temperature grade supports unconditioned plenum environments.
تجویز کردہ
Ceiling Fans and Pumps
Ceiling fans and small water pumps are classic PIC18LF2431-I/MM applications. The enhanced PWM provides silent sinusoidal commutation via 6-step or sinusoidal lookup tables, the 10-bit ADC reads potentiometer or IR remote speed settings, and nanoWatt sleep modes keep standby current below typical ENERGY STAR ceilings. The wide Vdd 2.0-5.5 V range supports both capacitive-drop 230 V → 5 V supplies and DC bus designs. The 28-pin QFN-S 6x6 mm package drops onto space-constrained in-motor PCBs.
تجویز کردہ
LED Lighting Ballasts
High-brightness LED ballasts with dimming benefit from the PIC18LF2431-I/MM combination of high-resolution PWM and analog comparators. The ECCP module drives constant-current buck/boost stages at programmable frequency with dead-time control; the 10-bit ADC reads photodiode or 0-10 V dimmer inputs; the comparator provides hardware overcurrent protection that shuts down the PWM within one cycle, protecting the LED string. The 2.0-5.5 V Vdd range integrates with universal AC-DC converters outputting 3.3 V or 5 V aux rails. Use PIC18LF2431 in conjunction with a CL8801 LED driver for high-end dim-to-warm designs.
تجویز کردہ
Uninterruptible Power Supplies (UPS)
Low-power line-interactive UPS and DC micro-UPS designs use the PIC18LF2431-I/MM as the supervisory controller. The 40 MHz core executes RMS line-voltage and current calculations in firmware, the 10-bit ADC samples the line and battery sense resistors, and the ECCP PWM drives the transfer relay or the inverter MOSFET bridge. The 2.0-5.5 V Vdd range supports battery-direct operation from a single Li-ion cell or a 3.6 V LiFePO4 pack. The 28-pin QFN-S footprint keeps the BOM small in compact desktop UPS units. Source: Microchip PIC18F2331/2431 datasheet DS39616.
تجویز کردہ
تجویز کردہ پروڈکٹس کا خلاصہ
کے لیے انجینئرنگ ریفرنس ڈیٹا PIC18LF2431-I/MM — موازنہ، ڈیزائن رہنمائی، اور تعمیل کی معلومات۔
انتخاب کی گائیڈ
متبادلات کے ساتھ موازنہ
| پیرامیٹر | یہ پروڈکٹ | PIC18LF2331-I/MM | PIC18F2431-I/MM | PIC18LF2331T-I/MM | PIC18LF2431-I/SP | PIC18F2331-I/MM |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-pin QFN-S (6x6 mm) with EP | 28-pin QFN-S (6x6 mm) with EP - same | 28-pin QFN-S (6x6 mm) with EP - same | 28-pin QFN-S (6x6 mm) with EP - same | 28-pin SPDIP (0.3 inch) - through-hole | 28-pin QFN-S (6x6 mm) with EP - same |
| Program Memory | 16 KB Flash | 8 KB Flash | 16 KB Flash | 8 KB Flash | 16 KB Flash | 8 KB Flash |
| Operating Voltage (Vdd) | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 4.2 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 4.2 V to 5.5 V |
| Maximum CPU Speed | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) |
| I/O Pins | 22 | 22 | 22 | 22 | 22 | 22 |
| Enhanced PWM (ECCP) | Yes (14-bit, 4 channels) | Yes (14-bit, 4 channels) | Yes (14-bit, 4 channels) | Yes (14-bit, 4 channels) | Yes (14-bit, 4 channels) | Yes (14-bit, 4 channels) |
| AEC-Q100 Automotive Qualified | No (Industrial grade only) | No | No | No | No | No |
اہم امتیازی خصوصیات
- Higher Flash density within same PIC18F motor-control family (بمقابلہPIC18LF2331-I/MM)
- Wide 2.0 V to 5.5 V Vdd range supports battery and USB operation (بمقابلہPIC18F2431-I/MM)
- Compact 6x6 mm QFN-S 28-pin footprint for space-constrained motor drives (بمقابلہPIC18LF2431-I/SP)
ڈیزائن نوٹس
Provide a low-inductance Vdd/Vss decoupling network on the PIC18LF2431-I/MM: a 10 µF bulk + 100 nF ceramic placed within 5 mm of the Vdd pins. The QFN-S package has multiple ground pads; route them to a continuous ground plane to minimize switching-noise coupling into the ADC. The 2.0-5.5 V wide-voltage range requires careful analog-circuit design below 3.0 V where LDO dropout and ADC LSB size both shrink. Source: Microchip PIC18F2331/2431 datasheet DS39616, 'Oscillator Configuration' and 'Power Management' sections.
The 28-pin QFN-S exposed pad (EP) is the package's primary thermal and electrical ground path. The EP MUST be soldered to a copper pad that is connected to Vss with multiple thermal vias to the inner ground plane. Insufficient EP soldering raises the junction temperature by tens of °C and can cause intermittent communication failures with the ICSP debugger. Keep high-current switching traces (PWM outputs, gate drivers) at least 3 mm from the ADC analog inputs to minimize digital-to-analog coupling.
Estimated: at 40 MHz and 5.0 V, the PIC18LF2431 draws ~16 mA core current (from datasheet DC characteristics); below 3.0 V, drop in clock frequency below 4 MHz to stay within spec. Do NOT toggle PWM outputs faster than 1 MHz without verifying ECCP resolution headroom. Do NOT float MCLR - always provide a 10 kΩ pull-up or the device may randomly reset in noisy environments. When migrating from LF2431 to F2431, ensure your minimum Vdd never drops below 4.2 V; below that the F variant has unspecified behavior. Source: PIC18F2331/2431 datasheet DS39616.
تعمیل کی معلومات
RoHS compliant and lead-free per Microchip product page. Industrial temperature grade (-40 to +85 °C); not AEC-Q100 qualified - choose PIC18F or PIC18LF automotive-grade variants for automotive applications. Halogen-free per Microchip environmental compliance documentation.
