PIC18LF4525T-I/PT - 8-bit 40MHz 48KB Flash MCU | Microchip
MPN: PIC18LF4525T-I/PT ✓ نشطPIC18LF4525T-I/PT نظرة عامة
A microcontroller (MCU) is a single-chip computer containing a CPU, memory, and programmable I/O peripherals. Within the broader semiconductor taxonomy, MCUs belong to the embedded processing category, alongside microprocessors (MPUs) and DSPs. The PIC18 architecture is an enhanced 8-bit Harvard RISC core with hardware multiplier and 16-bit instructions, sitting between the baseline PIC10/12/16 and the 16-bit PIC24/dsPIC families. The 'nanoWatt Technology' branding indicates advanced power-management features including multiple idle modes, sleep current under 100 nA typical, and peripheral disable for ultra-low-power applications.
Key features include a 10-bit ADC with up to 13 channels, 2 analog comparators, 2 CCP/ECCP modules, 2 USART modules (enhanced USART), 1 MSSP (SPI/I2C), and a 16-bit timer plus three 8-bit timers. The device supports ICD (In-Circuit Debugger) via 2-wire interface and self-programming Flash for bootloader implementations. The 44-TQFP package provides a robust industrial footprint for through-hole-free assembly.
The PIC18LF4525 architecture uses a 16-bit instruction word with 8-bit data path, a hardware multiply engine, and a 31-level hardware stack for subroutine nesting. With 40MHz operation (10 MIPS), the device delivers deterministic interrupt response and predictable execution timing suitable for real-time control. The Flash memory supports 100K erase/write cycles typical and 40 years retention.
Typical applications include industrial control systems, HVAC controllers, motor control peripherals, security alarm panels, remote sensor nodes, smart metering, and consumer appliances. Designers select the LF variant over the F variant for battery-powered applications that must operate below 4.2V, such as 3.3V systems.
When migrating from PIC18F4525 to PIC18LF4525, firmware is identical but verify ADC and EEPROM specifications at low voltage. The TQFP-44 package allows easy hand-soldering for prototypes and rework, and the wide VDD range simplifies mixed-voltage designs.
This page synthesizes distributor pricing, verified drop-in alternatives from Microchip's same-family portfolio, and practical design notes not consolidated in the manufacturer datasheet.
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الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع PIC18LF4525T-I/PT (نفس عامل الشكل والبصمة) — يختلف في Package, Core Architecture, Timers, Operating Temperature, MSL Level.
PIC18F4525T-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18LF4525-I/PT
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
PIC18F4620T-I/PT
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
PIC18LF4620T-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18LF4523T-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18F4523T-I/PT
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
PIC18LF4520T-I/PT
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
PIC18LF4525T-I/PT الحدود القصوى والخصائص الكهربائية
| Core Architecture | PIC18 (8-bit RISC) |
| CPU Core | PIC18 Enhanced Harvard |
| Maximum Clock Speed | 40 MHz (10 MIPS) |
| Program Memory (Flash) | 48 KB (24K x 16) |
| RAM | 3.8 KB (3968 bytes) |
| Data EEPROM | 1 KB (1024 bytes) |
| I/O Pins | 36 |
| ADC | 10-bit, up to 13 channels |
| Analog Comparators | 2 |
| CCP / ECCP Modules | 2 |
| USART | 2 (Enhanced USART) |
| MSSP (SPI / I2C) | 1 |
| Timers | 1 x 16-bit + 3 x 8-bit |
| Supply Voltage (VDD) | 2.0 V to 5.5 V (LF variant) |
| درجة حرارة التشغيل | -40 C to +85 C (Industrial, 'I') |
| العلبة | 44-pin TQFP (10 x 10 mm) |
| نوع التركيب | Surface Mount |
| Packaging | Tape & Reel ('T' suffix) |
| مستوى MSL | 3 (168 hours) |
| حالة RoHS | Compliant |
| Instruction Set | 16-bit instructions, 8-bit data path |
| Hardware Multiply | 8 x 8 single-cycle |
| Stack | 31-level hardware |
| Debug Support | ICD via 2-wire interface |
| Power-Saving Modes | nanoWatt Technology (idle, sleep, peripheral disable) |
تكوين أطراف PIC18LF4525T-I/PT
| دبوس 1 | OSC1/RA7 — Crystal oscillator input / GPIO |
| دبوس 2 | OSC2/RA6 — Crystal oscillator output / GPIO |
| دبوس 3 | MCLR — Master Clear (reset) input |
| دبوس 4 | RA0/AN0 — Digital I/O / Analog input 0 |
| دبوس 5 | RA1/AN1 — Digital I/O / Analog input 1 |
| دبوس 6 | RA2/AN2/VREF- — Digital I/O / Analog input 2 / ADC VREF- |
| دبوس 7 | RA3/AN3/VREF+ — Digital I/O / Analog input 3 / ADC VREF+ |
| دبوس 8 | RA4/T0CKI — Digital I/O / Timer0 clock input |
| دبوس 9 | RA5/AN4/SS — Digital I/O / Analog input 4 / SPI Slave Select |
| دبوس 10 | VSS — Ground |
| دبوس 11 | VDD — Positive supply voltage |
| دبوس 12 | RB0/INT0/FLT0 — Digital I/O / External interrupt 0 / ECCP fault input |
| دبوس 13 | RB1/INT1 — Digital I/O / External interrupt 1 |
| دبوس 14 | RB2/INT2 — Digital I/O / External interrupt 2 |
| دبوس 15 | RB3/INT3/CCP2 — Digital I/O / External interrupt 3 / CCP2 output |
| دبوس 16 | RB4/KBI0 — Digital I/O / Interrupt-on-change |
| دبوس 17 | RB5/KBI1 — Digital I/O / Interrupt-on-change |
| دبوس 18 | RB6/KBI2/PGC — Digital I/O / Interrupt-on-change / ICD clock |
| دبوس 19 | RB7/KBI3/PGD — Digital I/O / Interrupt-on-change / ICD data |
| دبوس 20 | VSS — Ground |
| دبوس 21 | VDD — Positive supply voltage |
| دبوس 22 | RC0/T1OSO/T1CKI — Digital I/O / Timer1 oscillator output / Timer1 clock |
| دبوس 23 | RC1/T1OSI/CCP2 — Digital I/O / Timer1 oscillator input / CCP2 |
| دبوس 24 | RC2/CCP1 — Digital I/O / CCP1 output |
| دبوس 25 | RC3/SCK/SCL — Digital I/O / SPI clock / I2C clock |
| دبوس 26 | RC4/SDI/SDA — Digital I/O / SPI data in / I2C data |
| دبوس 27 | RC5/SDO — Digital I/O / SPI data out |
| دبوس 28 | RC6/TX/CK — Digital I/O / USART TX / USART clock |
| دبوس 29 | RC7/RX/DT — Digital I/O / USART RX / USART data |
| دبوس 30 | VSS — Ground |
| دبوس 31 | VDD — Positive supply voltage |
| دبوس 32 | RD0/PSP0 — Digital I/O / Parallel Slave Port data 0 |
| دبوس 33 | RD1/PSP1 — Digital I/O / Parallel Slave Port data 1 |
| دبوس 34 | RD2/PSP2 — Digital I/O / Parallel Slave Port data 2 |
| دبوس 35 | RD3/PSP3 — Digital I/O / Parallel Slave Port data 3 |
| دبوس 36 | RD4/PSP4 — Digital I/O / Parallel Slave Port data 4 |
| دبوس 37 | RD5/PSP5 — Digital I/O / Parallel Slave Port data 5 |
| دبوس 38 | RD6/PSP6/TX2/CK2 — Digital I/O / PSP6 / USART2 TX |
| دبوس 39 | RD7/PSP7/RX2/DT2 — Digital I/O / PSP7 / USART2 RX |
| دبوس 40 | VSS — Ground |
| دبوس 41 | VDD — Positive supply voltage |
| دبوس 42 | RE0/RD/AN5 — Digital I/O / Parallel Slave Port read / Analog input 5 |
| دبوس 43 | RE1/WR/AN6 — Digital I/O / Parallel Slave Port write / Analog input 6 |
| دبوس 44 | RE2/CS/AN7 — Digital I/O / Parallel Slave Port CS / Analog input 7 |
التطبيقات النموذجية
PIC18LF4525T-I/PT مناسب لـ 6 التطبيقs: Industrial Control & Automation, HVAC Climate Controllers, Battery-Powered Remote Sensor Nodes, Security & Alarm Panels, Smart Energy Meters, Consumer Appliance Controllers.
Industrial Control & Automation
The PIC18LF4525T-I/PT's 40MHz core, 36 I/O pins, 10-bit ADC with 13 channels, and 2 CCP/ECCP modules make it ideal for industrial PLCs, motor control boards, and sensor interface modules. The 48KB Flash accommodates Modbus, CANopen, or custom industrial protocols with room for application-specific I/O handling. The 2.0V to 5.5V wide VDD range allows direct operation from 24V industrial bus rails after regulation, and the -40C to +85C industrial temperature grade ensures reliability in factory environments. Hardware QEI support via CCP modules simplifies brushless DC motor feedback. The Flash self-programming feature enables field firmware updates via bootloader.
موصى به
HVAC Climate Controllers
The PIC18LF4525T-I/PT drives HVAC thermostat and zone controller designs with its 10-bit ADC reading thermistor temperature sensors, PWM outputs driving TRIAC phases for heating elements, and 2 USART modules for communicating with indoor air quality sensors and Wi-Fi modules. The nanoWatt sleep current under 100 nA typical allows battery-backed thermostats to run for years on a single CR2032. The 48KB Flash supports full HVAC state machines plus LCD character display drivers. The 36 I/O lines are sufficient for keypad scanning, relay drivers, and 4-line LCD interfacing without additional glue logic.
موصى به
Battery-Powered Remote Sensor Nodes
The PIC18LF4525T-I/PT excels in battery-powered sensor applications where the LF variant's 2.0V VDD minimum allows direct operation from a single lithium cell or 2xAA batteries without boost converters. nanoWatt sleep modes reduce quiescent current to under 100 nA typical, with fast wake-up on interrupts for periodic sensor reads. The 1KB EEPROM provides parameter and calibration storage that survives firmware updates. The 10-bit ADC reads up to 13 analog channels for multi-sensor nodes (temperature, humidity, light). The 16-bit hardware multiplier accelerates sensor linearization and FFT processing for vibration or acoustic sensing.
موصى به
Security & Alarm Panels
The PIC18LF4525T-I/PT suits wired security alarm panels with its 36 I/O handling door/window sensors, PIR motion inputs, keypad scanning, and siren relay outputs. The 48KB Flash stores event logs and complex zone partitioning logic. Two enhanced USART modules drive GSM/cellular modems and serial keypads simultaneously. Hardware AES via software or external IC protects wireless transmissions. The 1KB EEPROM logs sensor calibration, installer codes, and last-event timestamps across power cycles. Industrial temperature range ensures reliable operation in unheated garages or outdoor enclosures.
موصى به
Smart Energy Meters
The PIC18LF4525T-I/PT integrates 10-bit ADC for current/voltage sensing in single-phase energy meters, with the 16-bit timer capturing pulse counts from calibration-grade measurement front-ends. The 48KB Flash stores TOU (time-of-use) tariff tables, LCD segment drivers, and DLMS/COSEM communication stacks. Two USART modules interface with optical port heads and PLC modems. Hardware ECCP provides precise PWM output for reactive power compensation. The wide 2.0V to 5.5V VDD range supports direct battery backup from supercapacitor reserves, maintaining RTC and tamper logging during power outages.
موصى به
Consumer Appliance Controllers
The PIC18LF4525T-I/PT powers washing machines, dishwashers, microwave ovens, and induction cooktops with its 40MHz real-time control handling BLDC motor commutation via 2 CCP/ECCP modules and QEI inputs. The 36 I/O interface to user keypads, LCD displays, buzzer drivers, and door-latch sensors. The 10-bit ADC reads thermistor, water level, and pressure sensor signals. The 48KB Flash supports touch sensing via CTMU and complex state machines for safety interlocks. Industrial temperature grade and 100K Flash endurance provide long-life reliability across consumer product lifecycles.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ PIC18LF4525T-I/PT — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | PIC18F4525T-I/PT | PIC18LF4525-I/PT | PIC18F4620T-I/PT | PIC18LF4620T-I/PT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-TQFP (10x10) | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same |
| Flash Memory | 48 KB | 48 KB | 48 KB | 64 KB | 64 KB |
| RAM | 3.8 KB | 3.8 KB | 3.8 KB | 3.8 KB | 3.8 KB |
| EEPROM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB |
| Max Clock Speed | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| VDD Range | 2.0 V to 5.5 V | 4.2 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 |
| 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 |
| ADC | 10-bit, 13 channels | 10-bit, 13 channels | 10-bit, 13 channels | 10-bit, 13 channels | 10-bit, 13 channels |
| I/O Pins | 36 | 36 | 36 | 36 | 36 |
أبرز الفروقات
- Wide 2.0V to 5.5V VDD range supports battery-powered designs (مقابلPIC18F4525T-I/PT)
- 48KB Flash with 100K endurance and 40-year retention (مقابلPIC18LF4520T-I/PT)
- Drop-in upgradability to 64KB Flash variants (مقابلPIC18LF4520T-I/PT)
- 2 Enhanced USART modules for simultaneous serial interfaces (مقابلPIC18LF2525T-I/SO (28-pin variant))
ملاحظات التصميم
Decouple VDD pins (5, 21, 31, 41) each with a 100 nF ceramic capacitor placed within 5 mm of the pin, plus a single 10 uF bulk capacitor near the supply entry point. The four VDD pins share internal bonding so all must be powered. For low-noise analog readings, add a 10 uF + 100 nF pair on AVCC if used as a separate analog rail.
Route the crystal traces (OSC1/OSC2, pins 1-2) as short as possible, surrounded by a ground pour on both sides. Keep the crystal within 10 mm of the MCU and avoid routing digital signals under the crystal or its guard traces. For high-speed 40MHz operation, this prevents EMI coupling and clock jitter that can corrupt UART timing.
Do not leave MCLR (pin 3) floating - it must be pulled to VDD through a 10 kOhm resistor, with optional 100 nF capacitor for noise filtering. A floating MCLR causes random resets. When using ICSP programming, ensure the PGC (pin 18) and PGD (pin 19) lines are not loaded with more than 50 pF total capacitance, including the ICSP header.
Estimated: At 40MHz with VDD=5V, the PIC18LF4525T-I/PT consumes approximately 20 mA active, dissipating 100 mW in the 44-TQFP package. The TQFP has typical theta_JA around 50 C/W, yielding a junction temperature rise of about 5 C above ambient. No heatsink is needed, but verify against ambient temperature by ensuring TJ_max=125C with worst-case ambient.
معلومات الامتثال
RoHS and REACH compliant per Microchip product declaration. Lead-free PbSn or matte-tin finish. Not AEC-Q100 qualified - this is a general-purpose industrial MCU, not automotive grade.