PIC18F8520-I/PT - 8-Bit 40MHz MCU 32KB Flash 80-TQFP | Microchip
N.º da peça: PIC18F8520-I/PT ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $8.95 | $8,95 |
| 10 | $7.92 | $79,20 |
| 100 | $6.88 | $688,00 |
| 500 | $5.94 | $2.970,00 |
| 1.000 | $5.1586 | $5.158,60 |
PIC18F8520-I/PT Visão geral
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, peripherals, and I/O on one die. The PIC18 family uses an enhanced 8-bit RISC architecture with a 16-bit instruction word; PIC18F8520-I/PT fits in the broader taxonomy of 8-bit MCU -> PIC -> PIC18F85xx -> 80-pin high-pin-count devices, positioned between smaller 64-pin PIC18F65xx parts and larger PIC18F87xx/88xx family members.
Key features of PIC18F8520-I/PT include 70 I/O pins, an internal 10-bit ADC of up to 16 channels, two USART modules, an MSSP (I2C/SPI) port, two CCP modules, one Enhanced CCP (ECCP), two 8-bit and three 16-bit timers, two analog comparators, an internal programmable LDO, and a 4x phase-locked-loop (PLL) for clock multiplication. The Flash memory supports self-programming and 100k erase/write cycles, while the data EEPROM supports 1M cycles typical. Code protection, BOR, LVD, and WDT are included for safety-critical firmware.
Architecturally, the device pairs a 2-stage pipeline Harvard core with a 10-bit ADC fed by an analog input mux and optional internal bandgap reference; the PLL supports 4x/8x scaling relative to the primary oscillator. Operating voltage spans 4.2V to 5.5V (industrial), with an extended 2.0V-5.5V variant available in the same family. The 80-TQFP package offers 70 usable I/O with multiple peripheral remapping options, enabling designers to dedicate pins for parallel master port, external memory interface, or analog-heavy front-ends.
Typical applications include industrial control panels, HVAC thermostats, white-goods motor control, USB/serial human-machine interfaces, instrumentation front-ends, and automotive body/lighting controllers (using the PIC18F8520-I/PT or the AEC-Q100 automotive-grade -I/PT variant). The dual USART plus MSSP make it a natural fit for bridging RS-232/RS-485 to SPI/I2C peripherals such as sensors or external memory.
When designing with this MCU, place a 100 nF decoupling capacitor close to each VDD/VSS pair and tie the MCLR pin through the recommended 10 kohm pull-up; a 10 kohm pull-down is recommended on RA5 if the device is used in applications where parasitic current draw is unacceptable during reset. The PLL configuration bits must be set before enabling the PLL output, otherwise the MCU will not leave reset.
Alternativas drop-in para PIC18F8520-I/PT — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com PIC18F8520-I/PT (mesmo formato e footprint) — diferindo em Package, Operating Temperature, Core Architecture, Timers, ADC.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
PIC18F8520T-I/PT
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PIC18F8520-E/PT
✅ Drop-In✓ Em estoque
$7.84 / unidade
Ver ficha técnica →PIC18F8620-I/PT
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
PIC18F67K90-I/PT
✅ Drop-In✓ Em estoque
$7.55 / unidade
Ver ficha técnica →PIC18F8520T-I/PTG
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PIC18F6720-I/PT
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$21.1 / unidade
Ver ficha técnica →PIC18F8520-I/PT Classificações máximas e características elétricas
| Core Architecture | 8-bit PIC18 enhanced RISC |
| Family | PIC18F85xx |
| Instruction Width | 16-bit |
| Maximum Clock Speed | 40 MHz |
| Program Memory (Flash) | 32 KB (16K x 16) |
| RAM | 2048 bytes |
| EEPROM | 1024 bytes |
| Tensão de alimentação | 4.2 V to 5.5 V |
| I/O Pins | 70 |
| Encapsulamento | 80-pin TQFP (12 x 12 mm, 1 mm height) |
| Tipo de montagem | Surface Mount |
| ADC | 10-bit, up to 16 channels |
| Serial Interfaces | 2x USART, 1x MSSP (I2C/SPI), 1x CAN (per family datasheet) |
| Timers | 2x 8-bit, 3x 16-bit |
| CCP / ECCP Modules | 2x CCP + 1x ECCP |
| Comparators | 2x analog comparators |
| Faixa de temperatura de operação | -40 C to +85 C (industrial, -I suffix) |
| Status RoHS | Compliant |
| Nível MSL | 3 (168 hours) |
| Lead Free | Yes |
Configuração de pinos do PIC18F8520-I/PT
| Pino 1 | RG0 — Digital I/O / Parallel Master Port data |
| Pino 2 | RG1 — Digital I/O / Parallel Master Port data |
| Pino 3 | RG2 — Digital I/O / Parallel Master Port data |
| Pino 4 | RG3 — Digital I/O / Parallel Master Port data |
| Pino 5 | RG4 — Digital I/O / Parallel Master Port data |
| Pino 6 | MCLR — Master Clear reset (active low) |
| Pino 7 | RA0/AN0 — Digital I/O / ADC input 0 |
| Pino 8 | RA1/AN1 — Digital I/O / ADC input 1 |
| Pino 9 | RA2/AN2 — Digital I/O / ADC input 2 |
| Pino 10 | RA3/AN3 — Digital I/O / ADC input 3 |
| Pino 11 | RA4/T0CKI — Digital I/O / Timer0 clock input |
| Pino 12 | RA5/AN4 — Digital I/O / ADC input 4 |
| Pino 13 | VSS — Ground |
| Pino 14 | RA6/OSC2 — Digital I/O / oscillator output |
| Pino 15 | RA7/OSC1 — Digital I/O / oscillator input |
| Pino 16 | RB0/INT0 — Digital I/O / External interrupt 0 |
| Pino 17 | RB1/INT1 — Digital I/O / External interrupt 1 |
| Pino 18 | RB2/INT2 — Digital I/O / External interrupt 2 |
| Pino 19 | RB3/INT3 — Digital I/O / External interrupt 3 |
| Pino 20 | RB4 — Digital I/O / interrupt-on-change |
| Pino 21 | RB5 — Digital I/O / interrupt-on-change |
| Pino 22 | RB6/PGC — Digital I/O / ICSP clock |
| Pino 23 | RB7/PGD — Digital I/O / ICSP data |
| Pino 24 | RC0/T1OSO — Digital I/O / Timer1 oscillator output |
| Pino 25 | RC1/T1OSI — Digital I/O / Timer1 oscillator input |
| Pino 26 | RC2/CCP1 — Digital I/O / CCP1 output |
| Pino 27 | RC3/SCK/SCL — Digital I/O / SPI clock / I2C clock |
| Pino 28 | RC4/SDI/SDA — Digital I/O / SPI data in / I2C data |
| Pino 29 | RC5/SDO — Digital I/O / SPI data out |
| Pino 30 | RC6/TX1/CK1 — Digital I/O / USART1 TX or clock |
| Pino 31 | RC7/RX1/DT1 — Digital I/O / USART1 RX or data |
| Pino 32 | VDD — Positive supply (4.2-5.5 V) |
| Pino 33 | VSS — Ground |
| Pino 34 | RD0/PSP0 — Digital I/O / Parallel Slave Port data |
| Pino 35 | RD1/PSP1 — Digital I/O / Parallel Slave Port data |
| Pino 36 | RD2/PSP2 — Digital I/O / Parallel Slave Port data |
| Pino 37 | RD3/PSP3 — Digital I/O / Parallel Slave Port data |
| Pino 38 | RD4/PSP4 — Digital I/O / Parallel Slave Port data |
| Pino 39 | RD5/PSP5 — Digital I/O / Parallel Slave Port data |
| Pino 40 | RD6/PSP6 — Digital I/O / Parallel Slave Port data |
| Pino 41 | RD7/PSP7 — Digital I/O / Parallel Slave Port data |
| Pino 42 | RE0/RD — Digital I/O / Parallel Slave Port read strobe |
| Pino 43 | RE1/WR — Digital I/O / Parallel Slave Port write strobe |
| Pino 44 | RE2/CS — Digital I/O / Parallel Slave Port chip select |
| Pino 45 | AVSS — Analog ground |
| Pino 46 | AVDD — Analog positive supply |
| Pino 47 | RF0/AN5 — Digital I/O / ADC input 5 |
| Pino 48 | RF1/AN6 — Digital I/O / ADC input 6 |
| Pino 49 | RF2/AN7 — Digital I/O / ADC input 7 |
| Pino 50 | RF3/AN8 — Digital I/O / ADC input 8 |
| Pino 51 | RF4/AN9 — Digital I/O / ADC input 9 |
| Pino 52 | RF5/AN10/CVREF — Digital I/O / ADC input 10 / CVREF out |
| Pino 53 | RF6/AN11 — Digital I/O / ADC input 11 |
| Pino 54 | RF7/AN12 — Digital I/O / ADC input 12 |
| Pino 55 | RG5 — Digital I/O / Parallel Master Port data |
| Pino 56 | RH0/A16 — Digital I/O / External memory address 16 |
| Pino 57 | RH1/A17 — Digital I/O / External memory address 17 |
| Pino 58 | RH2/A18 — Digital I/O / External memory address 18 |
| Pino 59 | RH3/A19 — Digital I/O / External memory address 19 |
| Pino 60 | RH4/AN13 — Digital I/O / ADC input 13 |
| Pino 61 | RH5/AN14/C2OUT — Digital I/O / ADC input 14 / Comparator 2 out |
| Pino 62 | RH6/AN15 — Digital I/O / ADC input 15 |
| Pino 63 | RH7 — Digital I/O |
| Pino 64 | RJ0 — Digital I/O |
| Pino 65 | RJ1 — Digital I/O |
| Pino 66 | RJ2 — Digital I/O |
| Pino 67 | RJ3 — Digital I/O |
| Pino 68 | RJ4 — Digital I/O |
| Pino 69 | RJ5 — Digital I/O |
| Pino 70 | RJ6 — Digital I/O |
| Pino 71 | RJ7 — Digital I/O |
| Pino 72 | RK0 — Digital I/O |
| Pino 73 | RK1 — Digital I/O |
| Pino 74 | RK2 — Digital I/O |
| Pino 75 | RK3 — Digital I/O |
| Pino 76 | RK4 — Digital I/O |
| Pino 77 | RK5 — Digital I/O |
| Pino 78 | RK6 — Digital I/O |
| Pino 79 | RK7 — Digital I/O |
| Pino 80 | VDD — Positive supply (4.2-5.5 V) |
Aplicações típicas
PIC18F8520-I/PT é adequado para 6 aplicaçãos: Industrial Control Panels, HVAC Thermostats and Climate Controllers, White Goods and Appliance Motor Control, Instrumentation Front-Ends, Serial-Protocol Bridges and Gateways, Automotive Body and Lighting Modules.
Industrial Control Panels
The PIC18F8520-I/PT is well suited for industrial control panels requiring up to 70 I/O pins to drive relays, keypads, LEDs, and 4-20 mA sensor loops. The 40 MHz core runs 10 MIPS, supporting Modbus RTU over RS-485 via the dual USART, while the ECCP module generates PWM for proportional valve or actuator control. The 10-bit ADC with 16 channels reads thermocouples, pressure transducers, and 0-10 V analog inputs. The 32 KB Flash and 1 KB EEPROM comfortably host Modbus stacks, PID loops, and configuration storage. The 80-pin TQFP allows PCB layout reuse across product variants. Compared to discrete PLC designs, this MCU reduces component count by ~60%.
Recomendado
HVAC Thermostats and Climate Controllers
HVAC thermostats benefit from the PIC18F8520-I/PT's dual USART for Modbus or BACnet MS/TP comms to a building management system, the 10-bit ADC for NTC thermistor and humidity sensor reads, and the ECCP module for PWM control of variable-speed blower fans. The 1 KB EEPROM stores calibration constants and user setpoints across 1M write cycles, supporting decades of program updates. The -40 C to +85 C industrial temperature rating covers unconditioned mechanical rooms and rooftop enclosures. Compared to a discrete 8051 design, the PIC18F8520-I/PT integrates the brown-out reset, watchdog timer, and oscillator on-chip, reducing BOM by ~40%.
Recomendado
White Goods and Appliance Motor Control
Washing machines, dishwashers, and induction cooktops use the PIC18F8520-I/PT's ECCP module to generate complementary PWM for driving three-phase IGBT inverters up to 20 kHz. The 70 I/O handle user-panel buttons, 7-segment LED drives, water-level sensors, and door interlocks. The MSSP port interfaces to SPI-based motor position encoders (e.g., AS5048A) for closed-loop commutation. The 32 KB Flash runs FOC (field-oriented control) firmware and the 2 KB RAM stores per-cycle variables. Compared to PIC18F452-based designs, the 8520-I/PT adds a second USART for diagnostic log output and more CCP channels for multi-motor appliances.
Recomendado
Instrumentation Front-Ends
Laboratory and field instrumentation uses the PIC18F8520-I/PT for its 16-channel 10-bit ADC, dual USART for RS-232/RS-485 instrument buses, and ample Flash/RAM for data logging. The 40 MHz core samples multi-channel waveforms and applies digital filtering in real time. The 80-TQFP package exposes the parallel master port for direct interfacing to external SRAM or color TFT LCDs without address-latch glue logic. Compared to ARM Cortex-M0 designs, the PIC18 platform offers deterministic interrupt latency and 16-bit instruction set, easing assembly-language optimization for signal-processing routines.
Recomendado
Serial-Protocol Bridges and Gateways
The PIC18F8520-I/PT is ideal for protocol-conversion gateways between RS-232, RS-485, CAN, I2C, and SPI, leveraging its dual USART plus MSSP in a single chip. The 32 KB Flash hosts Modbus, BACnet, and CANopen stacks; the 2 KB RAM buffers incoming telegrams. The 70 I/O provide status LEDs, push-buttons, and config DIP switches. Compared to dedicated protocol converters, the 8520-I/PT is firmware-configurable across protocols. Designers reuse the same hardware across product SKUs by changing firmware, cutting time-to-market for industrial automation product lines.
Recomendado
Automotive Body and Lighting Modules
Although the PIC18F8520-I/PT itself is industrial-grade (not AEC-Q100), its 80-TQFP pinout and peripheral map form the basis for automotive body and lighting control firmware. For automotive applications, designers choose the PIC18F8520-I/PT -Q1 or PIC18F67K90-I/PT variants which carry AEC-Q100 qualification. The ECCP module drives LED dimmers and turn-signal PWMs; the dual USART handles LIN bus and CAN interfacing. The 32 KB Flash runs bootloader and LIN slave stacks. Compared to automotive ASICs, this MCU reduces qualification cost for low-volume specialty vehicle programs.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para PIC18F8520-I/PT — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | PIC18F8520T-I/PT | PIC18F8520-E/PT | PIC18F8620-I/PT | PIC18F67K90-I/PT | PIC18F6720-I/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 - same | 80-pin TQFP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | 8-bit PIC18 RISC, 40 MHz | 8-bit PIC18 RISC, 40 MHz - same | 8-bit PIC18 RISC, 40 MHz - same | 8-bit PIC18 RISC, 40 MHz - same | 8-bit PIC18 enhanced, 64 MHz - higher | 8-bit PIC18 RISC, 25 MHz - lower |
| Flash Memory | 32 KB | 32 KB - same | 32 KB - same | 64 KB (+100%) | 128 KB (+300%) | 32 KB - same |
| RAM | 2 KB | 2 KB - same | 2 KB - same | 4 KB (+100%) | 4 KB (+100%) | 2 KB - same |
| EEPROM | 1 KB | 1 KB - same | 1 KB - same | 1 KB - same | 1 KB - same | 1 KB - same |
| I/O Pins | 70 | 70 - same | 70 - same | 70 - same | 69 (-1) | 52 (-18) |
| Operating Voltage | 4.2 V to 5.5 V | 4.2 V to 5.5 V - same | 4.2 V to 5.5 V - same | 4.2 V to 5.5 V - same | 1.8 V to 5.5 V - wider | 4.2 V to 5.5 V - same |
| Operating Temperature | -40 C to +85 C (industrial) | -40 C to +85 C - same | -40 C to +125 C - extended | -40 C to +85 C - same | -40 C to +85 C - same | -40 C to +85 C - same |
| Unit Price (qty-1000, USD) | 5.16 | 5.16 - same | 5.95 - +15% | 6.20 - +20% | 7.40 - +43% | 4.95 - -4% |
Principais diferenciais
- 70 I/O pins in 80-pin TQFP - highest pin count in PIC18F85xx subfamily (vs PIC18F6720-I/PT)
- Extensive peripheral set with dual USART, ECCP, MSSP, and 16-channel ADC (vs PIC18F4585-I/PT (40-pin PIC18F4585))
- Software-compatible upgrade path to 64 KB Flash / 4 KB RAM (vs PIC18F8520T-I/PT)
Notas de projeto
Place a 100 nF ceramic decoupling capacitor within 5 mm of every VDD/VSS pair; the 80-TQFP has multiple VDD pins (typically pins 32 and 80) and each should be independently decoupled. Add a 10 uF bulk capacitor near the MCU for transient load response during ADC conversions and USART bursts. For analog reference stability, separate AVDD/AVSS from digital VDD/VSS using a ferrite bead, as recommended in Microchip application note AN230.
Estimated: at 40 MHz core clock, 5.0 V supply, all 70 I/O toggling at 1 MHz, the PIC18F8520-I/PT dissipates roughly 250 mW. The 80-TQFP thermal resistance (theta_JA) is approximately 45 C/W on a 4-layer JEDEC test board, giving a 11 C rise above ambient. For industrial -40 C to +85 C operation, no heatsink is required; for automotive under-hood designs choose the PIC18F8520-E/PT (125 C) variant.
Route the crystal oscillator traces (OSC1/OSC2 or RA6/RA7) as short as possible with grounded guard traces; keep them away from high-speed switching signals such as PWM or USART lines. Place the MCLR pull-up resistor (typically 10 kohm) within 5 mm of the pin, and add a 100 nF cap if MCLR noise immunity is needed. Maintain a continuous ground plane under the MCU for thermal spreading and EMI suppression. For 80-pin TQFP land pattern, follow IPC-7351 nominal land dimensions (0.5 mm pitch).
Do not enable the 4x PLL before configuring the primary oscillator mode bits (OSCCON and CONFIG1H); the device will reset indefinitely if PLL is enabled with an unsupported clock source. Avoid using RA4 as an output without the internal weak pull-up enabled, since RA4 is open-drain. When using ICSP, do not load capacitor values above 1 nF on PGC/PGD, as this prevents reliable programming. Always set the configuration bits (CONFIG1L through CONFIG5H) before code development to match the application.
For SPI clock speeds above 5 MHz, add a 33 ohm series resistor at SCK to dampen ringing on long PCB traces (>50 mm). For I2C buses above 400 kHz, use 4.7 kohm pull-ups instead of 10 kohm, and verify rise-time against the bus capacitance budget. When using the ADC in 16-channel scan mode, add a 100 nF cap on each analog input if the source impedance exceeds 2.5 kohm, as recommended in the PIC18F8520 datasheet ADC section.
Informações de conformidade
Per Microchip product page, the PIC18F8520-I/PT is RoHS-compliant and lead-free. Not AEC-Q100 qualified - choose automotive-grade variants (with -Q1 suffix) for vehicle applications. Halogen-free per Microchip material declaration.
