PIC18LF2539T-I/SO - 8-bit 40MHz 24KB Flash MCU | Microchip
MPN: PIC18LF2539T-I/SO ✓ NakahandaPIC18LF2539T-I/SO Ulas
A microcontroller (MCU) is a single-chip computer containing a processor core, program and data memory, programmable I/O, and on-chip peripherals such as timers, capture/compare modules, and communication interfaces. PIC18 microcontrollers belong to Microchip's PIC18 family, which sits in the middle of the 8-bit PIC portfolio - above the baseline PIC10/12/16 families and below the 16-bit dsPIC70/PIC24 families - and is widely used in motor control, power conversion, and embedded control applications.
Key features of the PIC18LF2539 include 1408 bytes of RAM, 21 digital I/O pins, integrated Power Control PWM (PCPWM) modules tailored for variable-frequency drive control, and hardware multipliers supporting single-cycle 8x8 multiplication. The 40MHz oscillator yields a 10 MIPS instruction throughput, enabling deterministic execution of motor-control state machines. The I in the part marking indicates the industrial temperature grade of -40C to +85C, and the SO suffix denotes the 28-SOIC plastic package.
The PIC18LF2539 architecture combines an 8-bit Harvard RISC core with dual oscillator options and on-chip 10-bit ADC support. Internal peripherals include an Enhanced Capture/Compare/PWM module, a Master Synchronous Serial Port (MSSP) for SPI/I2C, an Enhanced Universal Synchronous/Receiver/Transmitter (EUSART), and a parallel slave port, giving designers a complete control platform in a single IC.
Typical applications include three-phase AC induction motor control, BLDC and PMSM variable-frequency drives, switched-mode power supplies with digital control loops, solar micro-inverters, and industrial automation controllers requiring deterministic PWM generation at high update rates.
When designing with this device, ensure the supply voltage stays within the LF core's 2.0V-5.5V range and provide adequate decoupling on VDD/AVDD pairs. Use the ICD 3 or PICkit 4 programmer for in-circuit debug and Flash programming.
This page synthesizes distributor pricing, same-package drop-in alternatives, application examples, and practical design notes not aggregated on a single manufacturer or distributor page.
Mga alternatibo na pwedeng ilagay na PIC18LF2539T-I/SO — parehas na package, pin-to-pin na katugmang. Hindi kasama ang mga bahagi ng iba't-ibang package na nangangailangan ng pagpapaayos ng PCB.
Variante sa Seri na ito
Katulad na modelo sa serye na katugma sa pagpasok PIC18LF2539T-I/SO (parehas na form factor at footprint) — pagkakaiba sa Package, ADC, I/O Pins, Operating Temperature, Core Architecture.
PIC18LF2539-I/SO
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →PIC18F2539-I/SO
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
PIC18LF2439-I/SO
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →PIC18LF2331-I/SO
✅ Drop-In ⚠️ Mga Talaan Hindi NaiwerikmoMagkontak para sa presyo
Tingnan ang Datasheet →PIC18LF252-I/SO
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →PIC18LF2539T-I/SO Mga Pinakamataas na Rating at Electrical Characteristics
| Core | PIC18 8-bit RISC |
| Core Frequency | 40 MHz (10 MIPS) |
| Flash Program Memory | 24 KB (12K x 16) |
| RAM | 1408 bytes |
| I/O Pins | 21 |
| Supply Voltage (LF) | 2.0 V to 5.5 V |
| Temperature na Operasyon | -40C to +85C (industrial grade) |
| Packhaging | 28-pin SOIC (0.295 inch / 7.50 mm body width) |
| Uri ng Pagpapasok | Surface Mount |
| Peripherals | MSSP (SPI/I2C), EUSART, Enhanced CCP, 10-bit ADC |
| Shipping Format | Tape & Reel (T suffix) |
| Pin/Package Code | SO (SOP, 28 leads, gull wing) |
| Tindminan RoHS | Compliant |
| AEC-Q100 Qualification | Not qualified (industrial grade only) |
Pin Configuration ng PIC18LF2539T-I/SO
| Pin 1 | MCLR/VPP/RE3 — Reset input / programming voltage / PORTE bit 3 |
| Pin 2 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| Pin 3 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| Pin 4 | RA2/AN2/VREF- — PORTA bit 2 / analog input 2 / ADC VREF- |
| Pin 5 | RA3/AN3/VREF+ — PORTA bit 3 / analog input 3 / ADC VREF+ |
| Pin 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Pin 7 | RA5/AN4/SS — PORTA bit 5 / analog input 4 / SPI slave select |
| Pin 8 | VSS — Digital ground |
| Pin 9 | OSC1/CLKI/RA7 — Crystal oscillator input / external clock / PORTA bit 7 |
| Pin 10 | OSC2/CLKO/RA6 — Crystal oscillator output / clock output / PORTA bit 6 |
| Pin 11 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| Pin 12 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 I/O |
| Pin 13 | RC2/CCP1 — PORTC bit 2 / Enhanced CCP1 output |
| Pin 14 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Pin 15 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Pin 16 | RC5/SDO — PORTC bit 5 / SPI data out |
| Pin 17 | RC6/TX/CK1 — PORTC bit 6 / EUSART TX / EUSART sync clock |
| Pin 18 | RC7/RX/DT1 — PORTC bit 7 / EUSART RX / EUSART data |
| Pin 19 | VSS — Digital ground |
| Pin 20 | VDD — Digital supply voltage |
| Pin 21 | RB0/INT0 — PORTB bit 0 / external interrupt 0 |
| Pin 22 | RB1/INT1 — PORTB bit 1 / external interrupt 1 |
| Pin 23 | RB2/INT2 — PORTB bit 2 / external interrupt 2 |
| Pin 24 | RB3/INT3/CCP2A — PORTB bit 3 / external interrupt 3 / CCP2 alt |
| Pin 25 | RB4 — PORTB bit 4 |
| Pin 26 | RB5/PGM — PORTB bit 5 / low-voltage programming |
| Pin 27 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Pin 28 | RB7/PGD — PORTB bit 7 / ICSP data |
Tipikal na mga Gamit
PIC18LF2539T-I/SO ay nararapat para sa 6 aplikasyons: 3-Phase AC Induction Motor Control, BLDC/PMSM Variable-Frequency Drives, Switched-Mode Power Supplies (Digital Control), Solar Micro-Inverters, Industrial Automation Controllers, Appliance Motor Control (Washing Machines, Fans).
3-Phase AC Induction Motor Control
The PIC18LF2539T-I/SO's integrated Power Control PWM (PCPWM) modules and 40MHz core make it ideal for variable-frequency drives controlling 3-phase AC induction motors. The 24 KB Flash accommodates space-vector modulation (SVM) lookup tables and PI controller code, while the 10 MIPS throughput supports deterministic control loops at 20 kHz PWM frequency. Place the MCU between the gate driver and current/voltage feedback signals; verify 2.0V-5.5V supply headroom under load transients.
Inirekomenda
BLDC/PMSM Variable-Frequency Drives
Brushless DC and Permanent Magnet Synchronous Motors require precise commutation timing that the PIC18LF2539T-I/SO delivers through its Enhanced Capture/Compare/PWM modules. The 40 MHz core and 24 KB Flash support sensorless FOC algorithms with 1-2 kHz control bandwidth, while the 21 I/O pins provide enough channels for Hall-sensor input, back-EMF sensing, and PWM outputs. Use the 10-bit ADC for current and voltage feedback; avoid exceeding the 5.5V absolute maximum on any I/O.
Inirekomenda
Switched-Mode Power Supplies (Digital Control)
Digitally controlled SMPS designs use the PIC18LF2539T-I/SO to implement voltage-mode and peak-current-mode control loops in software. The 24 KB Flash holds compensation coefficients and state-machine code, while the 10 MIPS throughput sustains 100-200 kHz switching frequency control loops with adequate phase margin. Place the MCU between the high-voltage analog front-end and the gate driver; add a 10uF/0.1uF decoupling pair on each VDD/AVDD pin.
Inirekomenda
Solar Micro-Inverters
Solar micro-inverters require maximum power point tracking (MPPT) algorithms running in real time at sub-second intervals, which the PIC18LF2539T-I/SO can deliver at 40 MHz. The 24 KB Flash stores perturb-and-observe or incremental-conductance MPPT code plus grid-synchronization PLL routines, while the 1408 bytes RAM buffers ADC sample streams. Operate from 2.0V-5.5V supplied by an auxiliary winding; isolate the MCU from the high-voltage PV rail with reinforced insulation.
Inirekomenda
Industrial Automation Controllers
Programmable Logic Controllers and remote I/O modules benefit from the PIC18LF2539T-I/SO's 21 I/O pins and industrial -40C to +85C temperature range. The 24 KB Flash supports ladder-logic interpreters and Modbus RTU stacks, while the EUSART and MSSP peripherals enable RS-485 and SPI communication with sensor arrays. Place the MCU on a 4-layer PCB with separate analog and digital ground planes; use IEC 61000-4-2 ESD protection on field-wiring I/Os.
Inirekomenda
Appliance Motor Control (Washing Machines, Fans)
White-goods appliance designers choose the PIC18LF2539T-I/SO for its combination of motor-control peripherals, low-voltage operation, and industrial temperature grade. The 24 KB Flash holds wash-cycle state machines and motor PID controllers, while the 2.0V-5.5V supply range supports direct battery or USB-powered designs. Verify EMC compliance per IEC 55014-1; add common-mode chokes on the AC mains input and a ferrite bead on the MCU supply rail.
Inirekomenda
Buod ng mga Inirekomendang Produkto
Impormasyon ng Talumpati sa Engineering for PIC18LF2539T-I/SO — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto | PIC18LF2539-I/SO | PIC18F2539-I/SO | PIC18LF2439-I/SO | PIC18LF2331-I/SO | PIC18LF252-I/SO |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SOIC | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same |
| Flash Memory | 24 KB | 24 KB | 24 KB | 16 KB | 8 KB | 32 KB |
| RAM | 1408 bytes | 1408 bytes | 1408 bytes | 768 bytes | 768 bytes | 1536 bytes |
| Core Frequency | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| Supply Voltage | 2.0 V to 5.5 V (LF) | 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 | 2.0 V to 5.5 V |
| I/O Pins | 21 | 21 | 21 | 21 | 21 | 23 |
| Shipping Format | Tape & Reel | Tube | Tube | Tube | Tube | Tube |
| Motor-Control PCPWM | Yes | Yes | Yes | Yes | Yes | No |
Pangunahing mga Pagkakaiba
- Lower-voltage 2.0V operation versus standard 4.2V minimum (kumpara saPIC18F2539-I/SO)
- Tape-and-reel shipping format for high-volume assembly (kumpara saPIC18LF2539-I/SO)
- 24 KB Flash with motor-control PCPWM peripheral (kumpara saPIC18LF252-I/SO)
Talaan ng Disenyo
Decouple each VDD pin with a 100 nF ceramic capacitor placed within 5 mm of the pin. The PIC18LF2539T-I/SO's LF variant operates from 2.0V to 5.5V; supply transients during motor switching can pull VDD below the minimum threshold. Add a 10 uF bulk capacitor at the board input and consider a ferrite bead on the supply rail to isolate digital noise from the gate-driver return current.
Route the 28-SOIC package with 0.5 mm pitch traces to keep breakout manageable. Keep crystal traces (OSC1/OSC2) short and surrounded by a ground guard ring to minimize EMI pickup. Use a 4-layer PCB with dedicated ground and VDD planes to provide low-impedance return paths for the high-current motor PWM signals; without proper planes, ground bounce can corrupt ADC readings.
The PIC18LF2539T-I/SO's Enhanced PWM outputs switch tens of volts per nanosecond on the PCB traces. Keep PWM traces short and avoid running them parallel to analog input traces to minimize capacitive crosstalk. Place a 100 ohm series resistor at each PWM output if the trace exceeds 25 mm to dampen ringing into the gate-driver inputs.
Do not connect the MCLR/VPP/RE3 pin directly to VDD without a 10 kohm pull-up - if left floating, spurious resets will occur in noisy motor-control environments. Do not exceed 5.5V absolute maximum on any I/O pin, including during PWM commutation transients. Do not skip the ICSP connector on prototypes - the PIC18LF2539 is field-upgradable only via ICSP, not via bootloader.
Impormasyon ng Pagsunod sa Kautusan
RoHS compliant per Microchip product page. Industrial temperature -40C to +85C only; not AEC-Q100 qualified. Use PIC18F variants with Q1 suffix for automotive designs.
