PIC18F8520-E/PT - 8-bit 25MHz 32KB Flash MCU 80-TQFP | Microchip
MPN: PIC18F8520-E/PT ✓ نشطPIC18F8520-E/PT نظرة عامة
What is a PIC18F microcontroller? The PIC18F family is a family of 8-bit Harvard-architecture microcontrollers from Microchip Technology that sit between the baseline PIC10/12/16 families and the 16-bit dsPIC/PIC24 families in the company's product hierarchy. PIC18F parts add a 16-bit instruction word, linear memory addressing, C-friendly architecture, hardware multiply, and richer peripherals (USB, CAN, Ethernet, ADC) compared to baseline PICs. As a microcontroller (MCU), the PIC18F8520 integrates CPU, Flash, SRAM, EEPROM, timers, ADC, communication peripherals, and I/O on a single die, eliminating the need for external memory in many embedded designs.
Key features of the PIC18F8520 include 68 digital I/O lines, two USART modules, one MSSP (SPI/I2C) module, two CCP modules plus one enhanced ECCP, five 8/16-bit timers, a 10-bit ADC with up to 16 channels, two analog comparators, and a 10-bit DAC reference module. The PIC18 instruction set provides 77 instructions with hardware multiply, allowing efficient C compilation and deterministic real-time response for control loops. Code protection, low-voltage programming, and ICSP (In-Circuit Serial Programming) support simplify prototyping and field updates.
The PIC18F8520 architecture exposes the same peripheral set as the smaller PIC18F452 but adds more RAM, more I/O, and a second USART, making it suitable for high-pin-count designs that still fit within an 8-bit instruction budget. Its 80-pin TQFP exposes 68 I/O with flexible peripheral remapping via PPS-like alternate pin functions on most lines, plus separate analog and digital power pins for noise isolation.
Typical applications for the PIC18F8520-E/PT include industrial control panels, HVAC controllers, automotive body and comfort modules, multi-sensor data loggers, and human-machine interface (HMI) boards where a low-cost 8-bit MCU with abundant I/O and two serial ports is preferred. Its 32 KB Flash supports GUI stacks or motor-control libraries, while the 10-bit ADC serves transducer monitoring.
Designers should pay attention to the 80-TQFP's thermal pad (EP) connection to ground for EMI suppression, and route AVSS/AVDD separately from digital supply when using ADC channels. Programming uses Microchip's MPLAB X IDE with the free MPLAB XC8 compiler, and ICSP requires dedicated PGC/PGD pins that must not be reassigned by the application.
This page synthesizes distributor pricing, drop-in alternatives from the PIC18F85xx family, and practical design notes not found in the standalone datasheet.
بدائل مباشرة لـ PIC18F8520-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 PIC18F8520-E/PT (نفس عامل الشكل والبصمة) — يختلف في Package, Timers, ADC, Core Architecture, Operating Temperature.
PIC18F8520-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18F8520T-E/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18F8520T-I/PT
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
PIC18F8621-E/PT
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
PIC18F8722-E/PT
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
PIC18F8520-E/PT الحدود القصوى والخصائص الكهربائية
| Core Architecture | 8-bit PIC18 enhanced RISC |
| Program Memory (Flash) | 32 KB (16K x 16) |
| Data SRAM | 2 KB (2048 bytes) |
| EEPROM | 256 bytes |
| Maximum CPU Speed | 25 MIPS (25 MHz oscillator) |
| Operating Voltage (VDD) | 4.2 V to 5.5 V |
| I/O Pins | 68 |
| Timers | 5 (8-bit and 16-bit) |
| ADC | 10-bit, up to 16 channels |
| Analog Comparators | 2 |
| USART | 2 |
| MSSP (SPI / I2C) | 1 |
| CCP / ECCP Modules | 2 CCP + 1 ECCP |
| درجة حرارة التشغيل | -40 C to +125 C (Extended, -E suffix) |
| العلبة | 80-pin TQFP (12 x 12 mm), -PT suffix |
| نوع التركيب | Surface Mount |
| Instruction Set | 77 instructions, hardware multiply |
| ICSP / ICD Support | Yes (PGC/PGD) |
| حالة RoHS | Compliant |
تكوين أطراف PIC18F8520-E/PT
| دبوس 1 | MCLR — Master Clear (reset, active low); tie to VDD through 10 kohm resistor for normal operation |
| دبوس 2 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| دبوس 3 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| دبوس 4 | RA2/AN2/VREF- — PORTA bit 2 / Analog input 2 / ADC negative reference |
| دبوس 5 | RA3/AN3/VREF+ — PORTA bit 3 / Analog input 3 / ADC positive reference |
| دبوس 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| دبوس 7 | RA5/AN4/SS — PORTA bit 5 / Analog input 4 / SPI slave select |
| دبوس 8 | RE0/RD/AN5 — PORTE bit 0 / Parallel-port read / Analog input 5 |
| دبوس 9 | RE1/WR/AN6 — PORTE bit 1 / Parallel-port write / Analog input 6 |
| دبوس 10 | RE2/CS/AN7 — PORTE bit 2 / Parallel-port chip select / Analog input 7 |
| دبوس 11 | VDD — Digital supply voltage 4.2 V to 5.5 V |
| دبوس 12 | VSS — Digital ground |
| دبوس 13 | OSC1/CLKIN — Oscillator crystal input / external clock input |
| دبوس 14 | OSC2/CLKOUT — Oscillator crystal output / clock output (Fosc/4) |
| دبوس 15 | RC0/T1OSO/T13CKI — PORTC bit 0 / Timer1 oscillator output / Timer1/3 clock |
| دبوس 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 output |
| دبوس 17 | RC2/CCP1 — PORTC bit 2 / CCP1 output |
| 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/TX1/CK1 — PORTC bit 6 / USART1 TX / USART1 clock |
| دبوس 26 | RC7/RX1/DT1 — PORTC bit 7 / USART1 RX / USART1 data |
| دبوس 27 | RD4/PSP4 — PORTD bit 4 / Parallel Slave Port bit 4 |
| دبوس 28 | RD5/PSP5 — PORTD bit 5 / Parallel Slave Port bit 5 |
| دبوس 29 | RD6/PSP6/TX2/CK2 — PORTD bit 6 / PSP6 / USART2 TX / USART2 clock |
| دبوس 30 | RD7/PSP7/RX2/DT2 — PORTD bit 7 / PSP7 / USART2 RX / USART2 data |
| دبوس 31 | VSS — Digital ground |
| دبوس 32 | VDD — Digital supply voltage 4.2 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/CCP2 — PORTB bit 3 / External interrupt 3 / CCP2 alt |
| دبوس 37 | RB4/KBI0 — PORTB bit 4 / Interrupt-on-change bit 0 |
| دبوس 38 | RB5/KBI1/PGM — PORTB bit 5 / IOC bit 1 / LVP programming |
| دبوس 39 | RB6/KBI2/PGC — PORTB bit 6 / IOC bit 2 / ICSP clock |
| دبوس 40 | RB7/KBI3/PGD — PORTB bit 7 / IOC bit 3 / ICSP data |
| دبوس 41 | AVSS — Analog ground |
| دبوس 42 | AVDD — Analog supply voltage 4.2 V to 5.5 V |
| دبوس 43 | RF0 — PORTF bit 0 (analog input on some variants) |
| دبوس 44 | RF1 — PORTF bit 1 |
| دبوس 45 | RF2 — PORTF bit 2 |
| دبوس 46 | RF3 — PORTF bit 3 |
| دبوس 47 | RF4 — PORTF bit 4 |
| دبوس 48 | RF5 — PORTF bit 5 |
| دبوس 49 | RF6 — PORTF bit 6 |
| دبوس 50 | RF7 — PORTF bit 7 |
| دبوس 51 | VSS — Digital ground |
| دبوس 52 | VDD — Digital supply voltage 4.2 V to 5.5 V |
| دبوس 53 | RG0 — PORTG bit 0 |
| دبوس 54 | RG1 — PORTG bit 1 |
| دبوس 55 | RG2 — PORTG bit 2 |
| دبوس 56 | RG3 — PORTG bit 3 |
| دبوس 57 | RG4 — PORTG bit 4 |
| دبوس 58 | RG5 — PORTG bit 5 |
| دبوس 59 | AVSS — Analog ground |
| دبوس 60 | AVDD — Analog supply voltage 4.2 V to 5.5 V |
| دبوس 61 | RH0 — PORTH bit 0 |
| دبوس 62 | RH1 — PORTH bit 1 |
| دبوس 63 | RH2 — PORTH bit 2 |
| دبوس 64 | RH3 — PORTH bit 3 |
| دبوس 65 | RH4 — PORTH bit 4 |
| دبوس 66 | RH5 — PORTH bit 5 |
| دبوس 67 | RH6 — PORTH bit 6 |
| دبوس 68 | RH7 — PORTH bit 7 |
| دبوس 69 | RJ0 — PORTJ bit 0 |
| دبوس 70 | RJ1 — PORTJ bit 1 |
| دبوس 71 | RJ2 — PORTJ bit 2 |
| دبوس 72 | RJ3 — PORTJ bit 3 |
| دبوس 73 | RJ4 — PORTJ bit 4 |
| دبوس 74 | RJ5 — PORTJ bit 5 |
| دبوس 75 | RJ6 — PORTJ bit 6 |
| دبوس 76 | RJ7 — PORTJ bit 7 |
| دبوس 77 | VSS — Digital ground |
| دبوس 78 | VDD — Digital supply voltage 4.2 V to 5.5 V |
| دبوس 79 | RK0 — PORTK bit 0 |
| دبوس 80 | RK1 — PORTK bit 1 |
التطبيقات النموذجية
PIC18F8520-E/PT مناسب لـ 7 التطبيقs: Industrial Control Panels, HVAC Climate Controllers, Automotive Body and Comfort Modules, Multi-Channel Data Loggers, Human-Machine Interface Boards, White-Goods Motor-Control Boards, Point-of-Sale Terminal Peripherals.
Industrial Control Panels
The PIC18F8520-E/PT fits industrial control panels with its 68 I/O and dual USART. The Extended -40 C to +125 C grade survives cabinet temperatures near motors and contactors. Place PGC/PGD on dedicated PORTB pins so ICSP works in-circuit. Two USARTs let one drive an RS-485 fieldbus while the other talks to a local HMI display. The 32 KB Flash supports ladder-logic or PID control libraries compiled in MPLAB XC8, and 2 KB SRAM buffers control-loop scratch variables.
موصى به
HVAC Climate Controllers
The PIC18F8520-E/PT suits HVAC controllers where the 10-bit ADC reads multiple temperature and pressure sensors while the ECCP module drives TRIAC phase-control outputs. The Extended temperature grade keeps the MCU alive inside rooftop units that hit 70 C ambient. Two USARTs allow simultaneous Modbus to a building-management system and a local service-port UART. The 256-byte EEPROM stores commissioning setpoints that survive power cycles without wear-leveling concerns.
موصى به
Automotive Body and Comfort Modules
The PIC18F8520-E/PT drives body-control modules where 68 I/O handle mirror, seat, lighting, and wiper switching. The Extended -40 C to +125 C grade covers cabin and under-hood thermal zones, though AEC-Q100 is not qualified on this part. The 10-bit ADC reads battery voltage and current shunts, while two USARTs talk to CAN gateways via external MCP2515 controllers. Designers reuse legacy PIC18 code while gaining 2x the Flash of a PIC18F452.
موصى به
Multi-Channel Data Loggers
The PIC18F8520-E/PT fits multi-channel data loggers where the 16-channel 10-bit ADC samples slowly-varying analog signals and stores them to an external SPI Flash via the MSSP module. The 2 KB SRAM buffers bursts before flushing to storage, and the EEPROM records log headers and timestamps. The Extended temperature grade lets the logger operate in outdoor enclosures. Two USARTs provide debug console and external GPS receiver connection simultaneously.
موصى به
Human-Machine Interface Boards
The PIC18F8520-E/PT powers HMI boards that scan a matrix keypad and drive an alphanumeric LCD or character OLED. Its 68 I/O drive LCD data/control lines plus LED backlight PWM via ECCP, while the MSSP runs I2C to a capacitive-touch controller. The 32 KB Flash holds menu-state machines and multilingual strings in XC8. Two USARTs allow field updates via RS-232 service port and a parallel Modbus link to a controller.
موصى به
White-Goods Motor-Control Boards
The PIC18F8520-E/PT runs washing-machine and dishwasher control boards where the ECCP module generates complementary PWM for an inverter-fed three-phase motor. Its 68 I/O drive valves, door locks, water-level sensors, and the user panel. The Extended temperature grade tolerates the 85 C-plus ambient inside the appliance cabinet. The MSSP communicates with a digital hall-effect sensor over SPI while a USART carries the diagnostic bus.
موصى به
Point-of-Sale Terminal Peripherals
The PIC18F8520-E/PT serves as a peripheral controller in POS terminals where the dual USART bridges the main CPU to a thermal printer and a magnetic-stripe reader. The 10-bit ADC monitors supply voltage and battery health, while the MSSP drives a 4x4 keypad via SPI I/O expanders. The 32 KB Flash holds USB HID stacks via software bit-banging, eliminating the need for an external USB controller in low-cost terminals.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ PIC18F8520-E/PT — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | PIC18F8520-I/PT | PIC18F8520T-E/PT | PIC18F8520T-I/PT | PIC18F8621-E/PT | PIC18F8722-E/PT |
|---|---|---|---|---|---|---|
| Package | 80-pin TQFP (12x12 mm) | 80-pin TQFP (12x12 mm) - same | 80-pin TQFP (12x12 mm) - same | 80-pin TQFP (12x12 mm) - same | 80-pin TQFP (12x12 mm) - same | 80-pin TQFP (12x12 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 32 KB | 32 KB - same | 32 KB - same | 32 KB - same | 64 KB | 128 KB |
| SRAM | 2 KB | 2 KB - same | 2 KB - same | 2 KB - same | 4 KB | 4 KB |
| Maximum CPU Speed | 25 MIPS (25 MHz) | 25 MIPS - same | 25 MIPS - same | 25 MIPS - same | 25 MIPS - same | 25 MIPS - same |
| Operating Temperature | -40 C to +125 C (E grade) | -40 C to +85 C (I grade) | -40 C to +125 C (E grade) - same | -40 C to +85 C (I grade) | -40 C to +125 C (E grade) - same | -40 C to +125 C (E grade) - same |
| I/O Pins | 68 | 68 - same | 68 - same | 68 - same | 68 - same | 68 - same |
| ADC Channels | 16 x 10-bit | 16 - same | 16 - same | 16 - same | 16 - same | 16 - same |
| USART Modules | 2 | 2 - same | 2 - same | 2 - same | 2 - same | 2 - same |
أبرز الفروقات
- Highest temperature grade in the 32 KB 80-TQFP 18F85xx tier (مقابلPIC18F8520-I/PT)
- Flash-upgrade path to 128 KB on identical 80-TQFP footprint (مقابلPIC18F8722-E/PT)
- Pin-to-pin compatibility with the entire PIC18F85xx 80-TQFP family (مقابلPIC18F6627-I/PT)
- Dual USART vs single USART on smaller 18F452 siblings (مقابلPIC18F452-I/PT)
ملاحظات التصميم
PIC18F8520-E/PT operates from 4.2 V to 5.5 V on VDD. Provide one 100 nF ceramic decoupling capacitor on each VDD/VSS pair (pins 11/12, 31/32, 51/52, 77/78) placed within 5 mm of the package pin. Place a bulk 10 uF tantalum or ceramic capacitor at the board power input. AVSS/AVDD pairs (pins 41/42 and 59/60) require their own 100 nF decoupling capacitors placed close to the pins; route AVSS directly to the analog ground plane via a via, not through a shared digital ground.
Estimated: at 25 MHz / 5 V with all I/O toggling, the PIC18F8520-E/PT draws approximately 50 mA, dissipating about 250 mW. The 80-pin TQFP has a theta_JA of approximately 45 C/W (typical, 4-layer JEDEC board), giving a 11 C junction rise above ambient - well within the 125 C limit. For Extended-grade designs in sealed enclosures without airflow, derate by adding 30 percent margin and consider placing the IC near a board edge or thermal via array.
Place the 80-TQFP on a 0.5 mm pitch land pattern with 0.25 mm via-in-pad recommended for the center thermal pad; connect the thermal pad to digital ground through at least four vias for mechanical and thermal integrity. Keep the ICSP signals PGC (pin 39) and PGD (pin 40) on PORTB free of any external pull-up stronger than 10 kohm to avoid contention with the ICD programmer; both lines should be reachable from a 2x3 0.1 inch header at the board edge for production programming.
Do not confuse the E (Extended) and I (Industrial) temperature grades when ordering - both share the same /PT package suffix. The OSC1/OSC2 pins require a configuration word selection of HS, XT, or EC oscillator mode matching the chosen crystal; default configuration after a blank-chip bulk erase is RC mode with PORTB pull-ups disabled. Always read the configuration bits after programming to confirm correct oscillator, watchdog, brownout, and code-protect settings.
The PIC18F8520-E/PT ADC achieves rated 10-bit performance only when AVSS/AVDD are isolated from digital VDD/VSS and the analog input source impedance stays below 2.5 kohm. Add a 100 nF ceramic capacitor on each analog input pin near the MCU; route analog traces away from switching signals and cross only at right angles. The MSSP SCK/SDA pins (RC3/RC4) require 4.7 kohm pull-ups for I2C at 100 kHz and 2.2 kohm at 400 kHz; the SPI SS pin (RA5) is unique to this family and must be driven by the master.
معلومات الامتثال
RoHS compliant per Microchip product page; lead-free TQFP package. Not AEC-Q100 qualified - automotive designs requiring formal certification should evaluate PIC18FxxKxx or PIC18FxxJxx AEC-Q100 grades. Halogen-free status not explicitly stated in provided data.
