PIC18LF2439-I/SP - 8-bit 40MHz MCU, 12KB Flash, 28-SPDIP
부품 번호: PIC18LF2439-I/SP ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $3.78 | $3.78 |
| 10 | $3.5 | $35.00 |
| 100 | $3.2 | $320.00 |
| 500 | $2.99 | $1,495.00 |
| 1,000 | $2.79 | $2,790.00 |
PIC18LF2439-I/SP 개요
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory, working RAM, data EEPROM, and peripheral IP such as timers, capture/compare/PWM channels, ADC, and communication controllers. PIC18F-family MCUs sit in the middle of Microchip's 8-bit hierarchy - above PIC10/PIC12/PIC16 baseline parts in code density and peripheral richness, below the PIC24/dsPIC and PIC32 16-/32-bit families in raw performance. They target cost-sensitive, deterministic, low-power embedded designs where an 8-bit instruction set and Harvard bus keep firmware development simple and toolchain license fees at zero.
Key features of the PIC18LF2439-I/SP include 8 MIPS peak throughput at 40 MHz, 10-bit ADC, three timer modules, two capture/compare/PWM modules optimized for switched-mode and motor control, an Enhanced USART, an I2C/SPI master/slave port, and a 10-bit PWM with complementary outputs for driving half-bridges. Hardware math acceleration (8x8 hardware multiply in one cycle) and a vectored interrupt controller with 17 sources reduce firmware complexity for closed-loop applications such as brushless DC (BLDC) and switched-reluctance motor (SRM) drives.
The PIC18LF2439 uses a 16-bit instruction word with a 32 KB linear code space - of which 12 KB is implemented in this die - and a 16-level hardware stack with software-pushable return addresses. The Harvard bus architecture decouples program fetch from data access, and the 8-bit data path keeps arithmetic unit area and power dissipation minimal. The "LF" prefix denotes the wide-range F-variant silicon (2.0-5.5 V), distinguishing it from non-LF members that require 4.2-5.5 V.
Typical applications for the PIC18LF2439-I/SP include 3-phase BLDC motor commutation, sensorless BLDC pumps and fans, switched-reluctance drives, low-end servo control, and ceiling-fan / appliance variable-frequency drives. The 28-SPDIP package suits through-hole manufacturing, hobbyist prototypes, and harsh-environment industrial boards where leaded parts survive thermal and vibration stress better than leadless QFN packages. The PIC18F2439/4439 family is one of Microchip's classic 8-bit motor-control families; engineers who design firmware on this die typically use the MPLAB XC8 toolchain, MPLAB Code Configurator (MCC), and the application note AN1079 (sensorless BLDC with back-EMF).
When designing with this part, take care to respect the absolute maximum VDD of 7.0 V and to clamp motor back-EMF events that can ride on the supply rail. Brown-out-reset (BOR) and the configurable low-voltage-detect (LVD) thresholds must be enabled during the configuration-word programming step - leaving BOR disabled can result in corrupted EEPROM during supply dips. Always program the CONFIG registers with the values from the latest Microchip datasheet before loading application firmware.
This page synthesizes distributor pricing (as of 2026-09-28), drop-in same-package alternatives, and practical design notes not consolidated in the manufacturer datasheet.
드롭인 대체품: PIC18LF2439-I/SP — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: PIC18LF2439-I/SP (동일 폼 팩터 및 풋프린트) — 차이점: Operating Temperature, Package, Program Memory (Flash), Timers, Mounting Type.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
PIC18LF2431-I/SP
✅ 드롭인✓ 재고 있음
$4.4 / 개
데이터시트 보기 →PIC18LF2431T-I/SP
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
PIC18F2439-I/SP
✅ 드롭인 ⚠️ 사양 미검증✓ 재고 있음
$5.05 / 개
데이터시트 보기 →PIC18F4439-I/SP
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
PIC18F2539-I/SP
✅ 드롭인 ⚠️ 사양 미검증✓ 재고 있음
$3.92 / 개
데이터시트 보기 →PIC18LF2439-I/SP 최대 정격 & 전기적 특성
| Core | PIC18, 8-bit RISC |
| 최대 클록 주파수 | 40 MHz |
| Instruction Throughput | 10 MIPS (4-cycle) / 8 MIPS @ 40 MHz |
| Program Memory (Flash) | 12 KB (6K x 16 words) |
| SRAM | 640 bytes |
| EEPROM | 256 bytes |
| Supply Voltage (VDD) | 2.0 V to 5.5 V |
| I/O Pins | 21 |
| PWM Modules | Power-Control PWM with complementary outputs |
| Timers | Timer0, Timer1, Timer2/3 |
| Communication | EUSART, MSSP (I2C/SPI) |
| 동작 온도 | -40 C to +85 C (Industrial, "I") |
| 패키지 | 28-pin SPDIP (Skinny Plastic DIP), through-hole |
| 실장 유형 | Through-Hole |
| RoHS 상태 | Compliant |
PIC18LF2439-I/SP 핀 구성
| 핀 1 | MCLR/VPP/RE3 — Master Clear (reset) input / programming voltage / digital input RE3 |
| 핀 2 | RA0/AN0 — PORTA bit 0 / analog input AN0 |
| 핀 3 | RA1/AN1 — PORTA bit 1 / analog input AN1 |
| 핀 4 | RA2/AN2/VREF- — PORTA bit 2 / analog input AN2 / ADC VREF- |
| 핀 5 | RA3/AN3/VREF+ — PORTA bit 3 / analog input AN3 / ADC VREF+ |
| 핀 6 | RA4/AN4/T0CKI — PORTA bit 4 / analog input AN4 / Timer0 clock input |
| 핀 7 | RA5/AN5 — PORTA bit 5 / analog input AN5 |
| 핀 8 | VSS — Ground reference |
| 핀 9 | OSC1/CLKI/RA7 — Crystal oscillator input / external clock / PORTA bit 7 |
| 핀 10 | OSC2/CLKO/RA6 — Crystal oscillator output / clock output / PORTA bit 6 |
| 핀 11 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| 핀 12 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 |
| 핀 13 | RC2/CCP1 — PORTC bit 2 / CCP1 PWM output |
| 핀 14 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| 핀 15 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| 핀 16 | RC5/SDO — PORTC bit 5 / SPI data out |
| 핀 17 | RC6/TX/CK — PORTC bit 6 / EUSART TX / EUSART clock |
| 핀 18 | RC7/RX/DT — PORTC bit 7 / EUSART RX / EUSART data |
| 핀 19 | VSS — Ground reference |
| 핀 20 | VDD — Positive supply voltage (2.0 V to 5.5 V) |
| 핀 21 | RB0/PWM0 — PORTB bit 0 / PWM output 0 |
| 핀 22 | RB1/PWM1 — PORTB bit 1 / PWM output 1 |
| 핀 23 | RB2/PWM2 — PORTB bit 2 / PWM output 2 |
| 핀 24 | RB3/PWM3 — PORTB bit 3 / PWM output 3 |
| 핀 25 | RB4/PWM4 — PORTB bit 4 / PWM output 4 |
| 핀 26 | RB5/PWM5 — PORTB bit 5 / PWM output 5 |
| 핀 27 | RB6/PGC — PORTB bit 6 / ICSP clock / ICD clock |
| 핀 28 | RB7/PGD — PORTB bit 7 / ICSP data / ICD data |
일반적인 애플리케이션
PIC18LF2439-I/SP 적합 용도: 7 애플리케이션s: 3-Phase BLDC Motor Control, Switched-Reluctance Motor (SRM) Drives, Variable-Frequency Drive (VFD) Front-End, Ceiling Fan and Exhaust Fan Controllers, Industrial Sensorless Pumps, Hobbyist and Educational Robotics, Low-End Servo and Stepper Controllers.
3-Phase BLDC Motor Control
The PIC18LF2439-I/SP is purpose-built for sensorless and sensored 3-phase BLDC motor commutation, leveraging its enhanced Power-Control PWM module with programmable dead time and a dedicated 14-bit motion-feedback channel. In a typical ceiling-fan or pump drive, the MCU sequences the three half-bridges at 20-40 kHz PWM while sampling back-EMF through the 10-bit ADC to estimate rotor position - eliminating Hall sensors and reducing BOM cost. The 12 KB Flash comfortably fits Microchip's AN1079 sensorless BLDC algorithm and PI speed-loop, while the 28-SPDIP package survives harsh industrial EMI better than QFN alternatives.
추천
Switched-Reluctance Motor (SRM) Drives
The PIC18LF2439-I/SP's complementary PWM outputs and configurable dead-time generators map directly to the asymmetric half-bridge topology that switched-reluctance drives require. The MCU generates phase-fire angles from a rotor-position lookup table (typically 4-8 KB) while the on-chip 10-bit ADC samples DC-bus current for current chopping. With 640 bytes SRAM and 256 bytes EEPROM, the part stores up to four user-selectable speed/torque profiles in EEPROM without external storage, ideal for appliance-grade SRM applications such as vacuum cleaners and washing-machine tubs.
추천
Variable-Frequency Drive (VFD) Front-End
In a low-power VFD front-end, the PIC18LF2439-I/SP serves as the supervisory controller that ramps V/Hz profiles, reads keypad inputs, and reports faults through the EUSART to an HMI. The LF variant's 2.0-5.5 V range supports 3.3 V logic to the HMI directly, eliminating a level shifter. The MCU runs the control loop at 1-2 kHz while the 28-SPDIP through-hole package makes prototype and field-repair trivial. With industrial -40 C to +85 C rating, it survives motor-cabinet ambient temperatures up to 60 C with proper derating.
추천
Ceiling Fan and Exhaust Fan Controllers
The PIC18LF2439-I/SP's low cost and 28-SPDIP hand-solder-friendly package make it ideal for ceiling-fan and exhaust-fan controllers in consumer appliances. The MCU drives a triac-based AC phase-cut dimmer or a small BLDC inverter via the Power-Control PWM, with zero-cross detection on a digital input. The 12 KB Flash stores smooth-startup profiles and the 256-byte EEPROM retains the last user-set speed after power loss. The 2.0-5.5 V range lets the design run directly from a capacitive-dropped 3.3 V rail without an LDO.
추천
Industrial Sensorless Pumps
Industrial sensorless pumps for HVAC and irrigation rely on the PIC18LF2439-I/SP to estimate rotor position from back-EMF, eliminating the Hall-sensor wiring harness and improving reliability in wet/dusty environments. The LF variant's 2.0-5.5 V supply tolerance lets it run directly from a regulated 3.3 V rail shared with Wi-Fi/BLE telemetry modules, while the EUSART and MSSP drive those radios. Industrial -40 C to +85 C rating and the rugged 28-SPDIP package suit pump-control cabinets.
추천
Hobbyist and Educational Robotics
The PIC18LF2439-I/SP is a popular choice for hobbyist robotics because it combines the classic 28-SPDIP package (breadboard-friendly, hand-solderable) with the PIC18 instruction set (8-bit, RISC, free MPLAB XC8 compiler). Beginners can step through PIC18F2439 motor-control examples from Microchip's application notes while using the on-chip debugger via ICSP. The 8 MIPS peak throughput and 12 KB Flash are sufficient for line-following robots, small servos, and educational BLDC learning kits, while the LF low-voltage range protects beginners from mis-wiring the supply.
추천
Low-End Servo and Stepper Controllers
For stepper drives and low-end RC-servo controllers, the PIC18LF2439-I/SP provides pulse-train generation through the Power-Control PWM and Timer2/3 modules, plus enough ADC channels to read potentiometer or current-sense feedback. The 12 KB Flash holds lookup tables for microstepping or servo profile interpolation. The 28-SPDIP package and through-hole pinout make this part popular in CNC retrofit kits and 3D-printer controller boards where leaded parts survive the thermal cycling of a hot-end enclosure.
추천
추천 제품 요약
엔지니어링 참조 데이터: PIC18LF2439-I/SP — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | PIC18LF2431-I/SP | PIC18F2439-I/SP | PIC18F4439-I/SP | PIC18F2539-I/SP |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SPDIP | 28-SPDIP - same | 28-SPDIP - same | 28-SPDIP - same | 28-SPDIP - same |
| Flash | 12 KB | 16 KB | 12 KB | 12 KB | 24 KB |
| SRAM | 640 B | 768 B | 640 B | 640 B | 1408 B |
| EEPROM | 256 B | 256 B | 256 B | 256 B | 256 B |
| I/O Pins | 21 | 21 | 21 | 21 | 21 |
| Supply Voltage (VDD) | 2.0 V to 5.5 V | 2.0 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 |
| Max Clock Frequency | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
주요 차별점
- Low-voltage F-variant silicon supports 2.0-5.5 V (vs PIC18F2439-I/SP)
- 12 KB Flash with 640 B SRAM in 28-SPDIP through-hole (vs PIC18F2539-I/SP)
- Enhanced Power-Control PWM with complementary outputs and dead-time (vs PIC18LF2321-I/SP)
- Drop-in compatible with PIC18LF2431-I/SP for memory upgrade (vs PIC18LF2431-I/SP)
설계 노트
Decouple VDD (pin 20) with a 100 nF X7R ceramic placed within 5 mm of the pin, plus a 10 uF bulk tantalum or aluminum polymer capacitor on the same net. The LF variant's 2.0-5.5 V supply tolerance lets you share a 3.3 V rail with radios/IMUs, but always confirm the EUSART and MSSP modules operate correctly at the chosen voltage (check VOH/VIH against the receiver datasheet). Brown-Out Reset (BOR) and Low-Voltage Detect (LVD) must be enabled in the CONFIG words - leaving them off risks EEPROM corruption during supply dips.
Keep the 28-SPDIP part away from switching power inductors and high-dV/dt motor phases - radiated noise on MCLR (pin 1) can spuriously reset the MCU. Place a 10 kohm pull-up on MCLR and a 100 nF decoupling cap right at the pin. For PWM outputs (RB0-RB5), keep traces short and matched in length to avoid shoot-through in the inverter from timing skew. The 28-SPDIP package handles hand-soldering well, but observe flux-cleaning best practices to avoid leakage currents that bias ADC readings.
The PIC18LF2439's 10-bit ADC shares input pins with digital I/O - configure ADC channels as analog inputs via the ANSEL register before each conversion to avoid digital crosstalk. For motor-control feedback (current sense, back-EMF), use a 100 ns acquisition time and average 4-16 samples to suppress PWM-synchronous noise. The internal bandgap reference has +/- 5% tolerance - if your application needs tighter ADC accuracy, drive VREF+ from an external MCP1525 or similar 2.5 V reference.
Do NOT skip the CONFIG-word programming step: leaving the watchdog timer enabled by default will reset the part within 4 ms unless firmware clears it. Enable the Power-on Reset (POR) and BOR with the correct voltage window for your supply. Watch out for the 8-bit stack warning - if your ISR nesting is deep, hardware stack overflow can cause erratic resets; use the MPLAB stack-depth diagnostic to verify. Finally, when migrating PIC18F2439 -> PIC18LF2439, re-check the CONFIG register defaults because the LF silicon has slightly different factory settings for the LF-specific oscillator modes.
Estimated: at 40 MHz, 5.0 V VDD, the PIC18LF2439 draws ~15 mA active current from the datasheet DC characteristics, which corresponds to ~75 mW dissipation. The 28-SPDIP package's theta_JA is approximately 70 C/W on a 4-layer test board, giving a ~5 C temperature rise above ambient - well within the -40 C to +85 C industrial range. No heatsink is needed. In a sealed motor-control enclosure with ambient up to 70 C, the part still operates 10 C below its 85 C limit with adequate PCB copper area on the ground pin.
규정 준수 정보
RoHS compliant per Microchip product page. Not AEC-Q100 qualified; this is an industrial-grade (I) part, not an automotive (E) part. For automotive motor control, choose PIC18F2439-I/SP or PIC18F4439-I/SP variants qualified to higher reliability standards.
