PIC18F4525-E/PT - 8-Bit 48KB Flash MCU, 44-TQFP | Microchip
MPN: PIC18F4525-E/PT ✓ نشطPIC18F4525-E/PT نظرة عامة
An 8-bit microcontroller (MCU) is a single-chip computer optimized for control-oriented embedded tasks. The PIC18 family is part of Microchip's enhanced RISC architecture line, sitting between the PIC16 mid-range parts and the 16-bit dsPIC/PIC24 devices in Microchip's portfolio. Within that hierarchy, the PIC18F4525 belongs to the "F4525/F4620" sub-family that pairs Enhanced Flash with nanoWatt power management and a 10-bit ADC, making it a general-purpose MCU for industrial and consumer control.
Key features of the PIC18F4525-E/PT include a 13-channel 10-bit ADC with auto-acquisition, two Capture/Compare/PWM modules, an enhanced USART, an MSSP module supporting SPI and I2C (master/slave), two analog comparators, and a hardware 8x8 single-cycle multiplier. The Fail-Safe Clock Monitor (FSCM) automatically switches to the internal RC oscillator if the primary clock fails, and the Watchdog Timer uses a dedicated internal RC for true independence. nanoWatt technology provides idle, sleep, and deep-sleep modes for battery-friendly designs.
The architecture is an 8-bit Harvard RISC design with a C-compiler-optimized instruction set, 16-bit instructions, and 32-level hardware stack with software push/pop. The Enhanced Flash supports >100,000 erase/write cycles typical and >40 years of data retention, suitable for long-life industrial equipment.
Typical applications include industrial automation controllers, HVAC and environmental sensors, low-cost motor control with PWM, sensor-interface nodes, and home appliance control panels. Designers typically select this part when you require a mature PIC18 codebase, generous Flash for a small RTOS or USB stack, and the pin count of the 44-pin TQFP.
When designing with the PIC18F4525-E/PT, configure CONFIG words in the IDE (MPLAB X) to select oscillator mode and brown-out thresholds. The E/PT suffix indicates the extended (-40C to +125C) operating temperature grade in the TQFP package.
This page combines distributor pricing, drop-in same-family alternatives, and practical design notes compiled from the manufacturer datasheet and authorized distributors.
بدائل مباشرة لـ PIC18F4525-E/PT — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع PIC18F4525-E/PT (نفس عامل الشكل والبصمة) — يختلف في Package, Operating Temperature, Program Memory (Flash), ADC, Timers.
PIC18F4525-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18F4620-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18F4620-E/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18F4525T-I/PT
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18F4520-E/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18F4525-E/PT الحدود القصوى والخصائص الكهربائية
| Product Family | PIC18F |
| Core | 8-bit PIC RISC |
| Program Memory | 48 KB Flash (Enhanced) |
| RAM | 3,384 bytes |
| EEPROM | 1 KB |
| Maximum CPU Speed | 40 MHz / 10 MIPS |
| Operating Voltage | 2.0 V to 5.5 V |
| I/O Pins | 36 |
| ADC | 13-channel, 10-bit |
| PWM Modules | 2 (CCP/ECCP) |
| Communication | 1x EUSART, 1x MSSP (SPI/I2C) |
| Comparators | 2 analog |
| Timers | 4 (Timer0-3) |
| Hardware Multiplier | 8x8 single-cycle |
| العلبة | 44-pin TQFP (10x10 mm) |
| درجة حرارة التشغيل | -40 C to +125 C (E grade) |
| Internal Oscillator | 31 kHz to 8 MHz with 4x PLL |
| نوع التركيب | Surface Mount |
| حالة RoHS | Compliant |
تكوين أطراف PIC18F4525-E/PT
| دبوس 1 | MCLR/VPP/RE3 — Master Clear (reset) input / programming voltage / PORTE bit 3 |
| دبوس 2 | RA0/AN0 — PORTA bit 0 / analog input channel 0 |
| دبوس 3 | RA1/AN1 — PORTA bit 1 / analog input channel 1 |
| دبوس 4 | RA2/AN2/VREF- — PORTA bit 2 / analog input channel 2 / ADC VREF- |
| دبوس 5 | RA3/AN3/VREF+ — PORTA bit 3 / analog input channel 3 / ADC VREF+ |
| دبوس 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| دبوس 7 | RA5/AN4/SS/LVDIN — PORTA bit 5 / analog input / SPI slave select / LVD input |
| دبوس 8 | RE0/RD/AN5 — PORTE bit 0 / read signal / analog input 5 |
| دبوس 9 | RE1/WR/AN6 — PORTE bit 1 / write signal / analog input 6 |
| دبوس 10 | RE2/CS/AN7 — PORTE bit 2 / chip select / analog input 7 |
| دبوس 11 | VDD — Positive supply voltage (2.0 V to 5.5 V) |
| دبوس 12 | VSS — Ground reference |
| دبوس 13 | OSC1/CLKI/RA7 — Crystal oscillator input / external clock input / PORTA bit 7 |
| دبوس 14 | OSC2/CLKO/RA6 — Crystal oscillator output / clock output / PORTA bit 6 |
| دبوس 15 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| دبوس 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 I/O |
| دبوس 17 | RC2/CCP1/P1A — PORTC bit 2 / CCP1 I/O / PWM output 1A |
| دبوس 18 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| دبوس 19 | RD0/PSP0 — PORTD bit 0 / parallel slave port bit 0 |
| دبوس 20 | RD1/PSP1 — PORTD bit 1 / parallel slave port bit 1 |
| دبوس 21 | RD2/PSP2 — PORTD bit 2 / parallel slave port bit 2 |
| دبوس 22 | RD3/PSP3 — PORTD bit 3 / parallel slave port bit 3 |
| دبوس 23 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| دبوس 24 | RC5/SDO — PORTC bit 5 / SPI data out |
| دبوس 25 | RC6/TX/CK — PORTC bit 6 / EUSART TX / EUSART clock |
| دبوس 26 | RC7/RX/DT — PORTC bit 7 / EUSART RX / EUSART data |
| دبوس 27 | RD4/PSP4 — PORTD bit 4 / parallel slave port bit 4 |
| دبوس 28 | RD5/PSP5/P1B — PORTD bit 5 / parallel slave port bit 5 / PWM output 1B |
| دبوس 29 | RD6/PSP6/P1C — PORTD bit 6 / parallel slave port bit 6 / PWM output 1C |
| دبوس 30 | RD7/PSP7/P1D — PORTD bit 7 / parallel slave port bit 7 / PWM output 1D |
| دبوس 31 | VSS — Ground reference |
| دبوس 32 | VDD — Positive supply voltage (2.0 V to 5.5 V) |
| دبوس 33 | RB0/INT0/FLT0 — PORTB bit 0 / external interrupt 0 / ECCP fault input |
| دبوس 34 | RB1/INT1 — PORTB bit 1 / external interrupt 1 |
| دبوس 35 | RB2/INT2 — PORTB bit 2 / external interrupt 2 |
| دبوس 36 | RB3/INT3/CCP2A — PORTB bit 3 / external interrupt 3 / CCP2 alternate |
| دبوس 37 | RB4/KBI0 — PORTB bit 4 / interrupt-on-change bit 0 |
| دبوس 38 | RB5/KBI1/PGM — PORTB bit 5 / interrupt-on-change bit 1 / LVP program |
| دبوس 39 | RB6/KBI2/PGC — PORTB bit 6 / interrupt-on-change bit 2 / ICSP clock |
| دبوس 40 | RB7/KBI3/PGD — PORTB bit 7 / interrupt-on-change bit 3 / ICSP data |
| دبوس 41 | VSS — Ground reference |
| دبوس 42 | VDD — Positive supply voltage (2.0 V to 5.5 V) |
| دبوس 43 | NC — Not connected (per datasheet) |
| دبوس 44 | NC — Not connected (per datasheet) |
التطبيقات النموذجية
PIC18F4525-E/PT مناسب لـ 6 التطبيقs: Industrial Automation Controller, HVAC Environmental Sensor Node, Low-Cost BLDC / DC Motor Control, Home Appliance Control Panel, Data Acquisition Front-End, Educational Embedded Platform.
Industrial Automation Controller
The PIC18F4525-E/PT is a strong fit for industrial automation controllers because its 48 KB Enhanced Flash accommodates finite state machines and Modbus RTU command tables, while the 13-channel 10-bit ADC scans multiple 4-20 mA loop inputs via external shunt resistors. The E grade -40C to +125C temperature rating handles unventilated control cabinet environments, and the Fail-Safe Clock Monitor recovers gracefully if a clock crystal is damaged by vibration. The 36 I/O pins drive relay coils, opto-isolated inputs, and status LEDs directly. Use the EUSART for RS-485 and the MSSP for SPI I/O expansion to ADC/DAC chips. Power is typically 24 VDC bucked to 5 V or 3.3 V; the 2.0 V to 5.5 V VDD range accepts either rail.
موصى به
HVAC Environmental Sensor Node
For HVAC environmental sensor nodes, the PIC18F4525-E/PT integrates the ADC, two analog comparators, and EUSART in one 44-pin TQFP, simplifying BOM. The 13 ADC channels read temperature (NTC thermistor via divider), humidity (capacitive sensor via RC time), and airflow (differential pressure) without an external ADC. nanoWatt idle and sleep modes drop quiescent current below typical sensor budgets, making battery- or energy-harvested operation feasible. The MSSP drives an SPI OLED status display; the EUSART reports to a central controller over RS-485. The E grade thermal rating is essential when the node sits in a ceiling plenum above 70C ambient.
موصى به
Low-Cost BLDC / DC Motor Control
The PIC18F4525-E/PT can drive low-cost BLDC or brushed DC motor stages thanks to its two CCP/ECCP modules generating complementary PWM with programmable dead-band, hardware fault input, and the 10-bit ADC for back-EMF or current sensing via shunt. The 8x8 hardware multiplier handles field-oriented control math in real time at 10 MIPS. The 36 I/O pins support three half-bridges, quadrature encoder input, and direction/disable logic. The E grade thermal rating lets the MCU sit near the FET bridge on the same PCB without derating. For sensorless FOC of small fans and pumps, the 48 KB Flash is ample; for higher-power FOC, scale up to the PIC18F46K22.
موصى به
Home Appliance Control Panel
In washing machines, dishwashers, and induction cooktops, the PIC18F4525-E/PT drives the segmented LCD or LED display, scans the keypad matrix, and modulates triac-trigger or relay outputs through the CCP PWM and standard I/O. The 48 KB Flash stores appliance state machines and user menus in C18 or XC8; the 3,384-byte RAM holds display buffers; and the 1 KB EEPROM retains the last wash cycle even after power loss. The MSSP slaves to a Wi-Fi module (e.g., ESP32-S3) for IoT retrofit. The E grade thermal rating handles cooking-appliance ambient temperatures up to 125C.
موصى به
Data Acquisition Front-End
The PIC18F4525-E/PT serves as a low-speed multi-channel data acquisition front-end by exploiting the 13-channel 10-bit ADC at up to approximately 100 ksps aggregate. Acquired samples are timestamped, decimated, and streamed over EUSART to a host PC or over MSSP to an external SD card via SPI. The 3,384-byte RAM serves as a circular sample buffer; the 48 KB Flash stores calibration coefficients and decimation FIR coefficients. The E grade temperature rating and the PIC18F4525's 2.0 V to 5.5 V VDD range allow direct sensing from battery stacks or industrial 24 V rails after resistive scaling.
موصى به
Educational Embedded Platform
The PIC18F4525-E/PT remains a popular teaching vehicle for undergraduate embedded systems courses due to its 44-pin TQFP with generous I/O breakout, mature MPLAB X IDE support, free XC8 compiler, and abundant student-facing tutorials. Students learn interrupt-driven design with four timers, ADC sampling theory, and peripheral protocols (UART, SPI, I2C) on a single part. The 48 KB Flash fits multi-week labs building a stopwatch, voltmeter, and finally a small RTOS scheduler. Pickit 5 in-circuit debug support makes the PIC18F4525-E/PT fully debuggable without external tools.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ PIC18F4525-E/PT — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | PIC18F4525-I/PT | PIC18F4620-I/PT | PIC18F4620-E/PT | PIC18F4525T-I/PT | PIC18F4520-E/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-44 (10x10 mm) | TQFP-44 - same | TQFP-44 - same | TQFP-44 - same | TQFP-44 - same | TQFP-44 - same |
| Flash Memory | 48 KB | 48 KB | 64 KB (+33%) | 64 KB (+33%) | 48 KB | 32 KB (-33%) |
| RAM | 3,384 bytes | 3,384 bytes | 3,968 bytes (+17%) | 3,968 bytes (+17%) | 3,384 bytes | 1,536 bytes (-55%) |
| Temperature Grade | E (-40C to +125C) | I (-40C to +85C) | I (-40C to +85C) | E (-40C to +125C) | I (-40C to +85C) | E (-40C to +125C) |
| Max 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 |
| ADC | 13-ch, 10-bit | 13-ch, 10-bit | 13-ch, 10-bit | 13-ch, 10-bit | 13-ch, 10-bit | 13-ch, 10-bit |
| PWM Modules | 2 (CCP/ECCP) | 2 (CCP/ECCP) | 2 (CCP/ECCP) | 2 (CCP/ECCP) | 2 (CCP/ECCP) | 2 (CCP/ECCP) |
أبرز الفروقات
- Same-die I grade alternative for cost-sensitive indoor designs (مقابلPIC18F4525-I/PT)
- Drop-in 64 KB Flash upgrade on the same footprint (مقابلPIC18F4620-E/PT)
- Downgrade path for cost reduction when Flash headroom is unused (مقابلPIC18F4520-E/PT)
ملاحظات التصميم
Place a 100 nF ceramic decoupling capacitor within 5 mm of every VDD/VSS pair on the PIC18F4525-E/PT. The 44-pin TQFP exposes three VDD pins (11, 32, 42) and two VSS pins (12, 31, 41); each VDD must have its own 100 nF cap. Add a bulk 10 uF tantalum or aluminum-polymer cap near the MCU inlet. The PIC18F4525-E/PT's nanoWatt idle and sleep modes require stable VDD; brown-out reset (BOR) should be enabled in CONFIG words to avoid undefined EEPROM writes during supply droop.
Route the ICSP clock (PGC, RB6) and data (PGD, RB7) lines as a 2-wire bus with ground return; keep total length under 75 mm to avoid Pickit 5 programming failures. If using the parallel slave port (PORTD + PORTE), group PSP pins together on one connector edge to minimize bus-stub reflections. The 44-pin TQFP at 0.8 mm pitch requires IPC-A-610 Class 2 stencil apertures of 1:1 pad ratio with 0.1 mm reduction for reliable reflow.
Do not leave the MCLR pin floating - even with the internal weak pull-up selected in CONFIG, add an external 10 kohm pull-up to VDD to ensure reliable reset in noisy industrial environments. The PIC18F4525's ADC requires the A/D acquisition time (Tacq) to be at least 1.4 us; setting ACQT to 8 TAD or 16 TAD covers most impedances. Watchdog Timer postscaler must be cleared by CLRWDT in long loops, or the PIC18F4525 will unexpectedly reset during firmware development. Finally, disable the CONFIG4L LVP bit unless using low-voltage programming - LVP conflicts with RB5 digital I/O.
معلومات الامتثال
Microchip PIC18F4525-E/PT is RoHS compliant per distributor listings. AEC-Q100 automotive qualification is not stated; for AEC-Q100 qualified Microchip PIC18 alternatives, select the PIC18F4620-I/P automotive-grade variant or consult Microchip's automotive MCU portfolio. Lead-free reflow profile per JEDEC J-STD-020.