PIC18F8520-E/PT - 8-bit 25MHz 32KB Flash MCU 80-TQFP | Microchip
N.º de pieza: PIC18F8520-E/PT ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $12.14 | $12,14 |
| 10 | $11.42 | $114,20 |
| 100 | $10.18 | $1.018,00 |
| 500 | $8.97 | $4.485,00 |
| 1.000 | $7.84 | $7.840,00 |
PIC18F8520-E/PT Descripción general
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.
Alternativas directas para PIC18F8520-E/PT — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con PIC18F8520-E/PT (mismo factor de forma y huella) — difiere en Package, Timers, ADC, Core Architecture, Operating Temperature.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
PIC18F8520-I/PT
✅ Sustitución directa✓ En stock
$5.1586 / unidad
Ver hoja de datos →PIC18F8520T-E/PT
✅ Sustitución directa✓ En stock
$5.52 / unidad
Ver hoja de datos →PIC18F8520T-I/PT
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
PIC18F8621-E/PT
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
PIC18F8722-E/PT
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
PIC18F8520-E/PT Valores máximos y características eléctricas
| 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 |
| Temperatura de funcionamiento | -40 C to +125 C (Extended, -E suffix) |
| Encapsulado | 80-pin TQFP (12 x 12 mm), -PT suffix |
| Tipo de montaje | Surface Mount |
| Instruction Set | 77 instructions, hardware multiply |
| ICSP / ICD Support | Yes (PGC/PGD) |
| Estado RoHS | Compliant |
Configuración de pines de PIC18F8520-E/PT
| Pin 1 | MCLR — Master Clear (reset, active low); tie to VDD through 10 kohm resistor for normal operation |
| 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 negative reference |
| Pin 5 | RA3/AN3/VREF+ — PORTA bit 3 / Analog input 3 / ADC positive reference |
| 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 | RE0/RD/AN5 — PORTE bit 0 / Parallel-port read / Analog input 5 |
| Pin 9 | RE1/WR/AN6 — PORTE bit 1 / Parallel-port write / Analog input 6 |
| Pin 10 | RE2/CS/AN7 — PORTE bit 2 / Parallel-port chip select / Analog input 7 |
| Pin 11 | VDD — Digital supply voltage 4.2 V to 5.5 V |
| Pin 12 | VSS — Digital ground |
| Pin 13 | OSC1/CLKIN — Oscillator crystal input / external clock input |
| Pin 14 | OSC2/CLKOUT — Oscillator crystal output / clock output (Fosc/4) |
| Pin 15 | RC0/T1OSO/T13CKI — PORTC bit 0 / Timer1 oscillator output / Timer1/3 clock |
| Pin 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 output |
| Pin 17 | RC2/CCP1 — PORTC bit 2 / CCP1 output |
| Pin 18 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Pin 19 | RD0/PSP0 — PORTD bit 0 / Parallel Slave Port bit 0 |
| Pin 20 | RD1/PSP1 — PORTD bit 1 / Parallel Slave Port bit 1 |
| Pin 21 | RD2/PSP2 — PORTD bit 2 / Parallel Slave Port bit 2 |
| Pin 22 | RD3/PSP3 — PORTD bit 3 / Parallel Slave Port bit 3 |
| Pin 23 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Pin 24 | RC5/SDO — PORTC bit 5 / SPI data out |
| Pin 25 | RC6/TX1/CK1 — PORTC bit 6 / USART1 TX / USART1 clock |
| Pin 26 | RC7/RX1/DT1 — PORTC bit 7 / USART1 RX / USART1 data |
| Pin 27 | RD4/PSP4 — PORTD bit 4 / Parallel Slave Port bit 4 |
| Pin 28 | RD5/PSP5 — PORTD bit 5 / Parallel Slave Port bit 5 |
| Pin 29 | RD6/PSP6/TX2/CK2 — PORTD bit 6 / PSP6 / USART2 TX / USART2 clock |
| Pin 30 | RD7/PSP7/RX2/DT2 — PORTD bit 7 / PSP7 / USART2 RX / USART2 data |
| Pin 31 | VSS — Digital ground |
| Pin 32 | VDD — Digital supply voltage 4.2 V to 5.5 V |
| Pin 33 | RB0/INT0/FLT0 — PORTB bit 0 / External interrupt 0 / ECCP fault input |
| Pin 34 | RB1/INT1 — PORTB bit 1 / External interrupt 1 |
| Pin 35 | RB2/INT2 — PORTB bit 2 / External interrupt 2 |
| Pin 36 | RB3/INT3/CCP2 — PORTB bit 3 / External interrupt 3 / CCP2 alt |
| Pin 37 | RB4/KBI0 — PORTB bit 4 / Interrupt-on-change bit 0 |
| Pin 38 | RB5/KBI1/PGM — PORTB bit 5 / IOC bit 1 / LVP programming |
| Pin 39 | RB6/KBI2/PGC — PORTB bit 6 / IOC bit 2 / ICSP clock |
| Pin 40 | RB7/KBI3/PGD — PORTB bit 7 / IOC bit 3 / ICSP data |
| Pin 41 | AVSS — Analog ground |
| Pin 42 | AVDD — Analog supply voltage 4.2 V to 5.5 V |
| Pin 43 | RF0 — PORTF bit 0 (analog input on some variants) |
| Pin 44 | RF1 — PORTF bit 1 |
| Pin 45 | RF2 — PORTF bit 2 |
| Pin 46 | RF3 — PORTF bit 3 |
| Pin 47 | RF4 — PORTF bit 4 |
| Pin 48 | RF5 — PORTF bit 5 |
| Pin 49 | RF6 — PORTF bit 6 |
| Pin 50 | RF7 — PORTF bit 7 |
| Pin 51 | VSS — Digital ground |
| Pin 52 | VDD — Digital supply voltage 4.2 V to 5.5 V |
| Pin 53 | RG0 — PORTG bit 0 |
| Pin 54 | RG1 — PORTG bit 1 |
| Pin 55 | RG2 — PORTG bit 2 |
| Pin 56 | RG3 — PORTG bit 3 |
| Pin 57 | RG4 — PORTG bit 4 |
| Pin 58 | RG5 — PORTG bit 5 |
| Pin 59 | AVSS — Analog ground |
| Pin 60 | AVDD — Analog supply voltage 4.2 V to 5.5 V |
| Pin 61 | RH0 — PORTH bit 0 |
| Pin 62 | RH1 — PORTH bit 1 |
| Pin 63 | RH2 — PORTH bit 2 |
| Pin 64 | RH3 — PORTH bit 3 |
| Pin 65 | RH4 — PORTH bit 4 |
| Pin 66 | RH5 — PORTH bit 5 |
| Pin 67 | RH6 — PORTH bit 6 |
| Pin 68 | RH7 — PORTH bit 7 |
| Pin 69 | RJ0 — PORTJ bit 0 |
| Pin 70 | RJ1 — PORTJ bit 1 |
| Pin 71 | RJ2 — PORTJ bit 2 |
| Pin 72 | RJ3 — PORTJ bit 3 |
| Pin 73 | RJ4 — PORTJ bit 4 |
| Pin 74 | RJ5 — PORTJ bit 5 |
| Pin 75 | RJ6 — PORTJ bit 6 |
| Pin 76 | RJ7 — PORTJ bit 7 |
| Pin 77 | VSS — Digital ground |
| Pin 78 | VDD — Digital supply voltage 4.2 V to 5.5 V |
| Pin 79 | RK0 — PORTK bit 0 |
| Pin 80 | RK1 — PORTK bit 1 |
Aplicaciones típicas
PIC18F8520-E/PT es adecuado para 7 aplicacións: 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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para PIC18F8520-E/PT — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | 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 |
Diferenciadores clave
- Highest temperature grade in the 32 KB 80-TQFP 18F85xx tier (frente a PIC18F8520-I/PT)
- Flash-upgrade path to 128 KB on identical 80-TQFP footprint (frente a PIC18F8722-E/PT)
- Pin-to-pin compatibility with the entire PIC18F85xx 80-TQFP family (frente a PIC18F6627-I/PT)
- Dual USART vs single USART on smaller 18F452 siblings (frente a PIC18F452-I/PT)
Notas de diseño
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.
Información de cumplimiento
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.
