PIC18F6520-I/PT - 8-Bit 40MHz 32KB Flash MCU 64-TQFP | Microchip
MPN: PIC18F6520-I/PT ✓ Hoạt độngPIC18F6520-I/PT Tóm tắt
An 8-bit microcontroller (MCU) is a compact programmable processor built around a CPU with 8-bit wide data paths, on-chip memory (Flash for code, SRAM for data, EEPROM for non-volatile storage), and integrated peripherals such as timers, ADC, communication interfaces (UART, SPI, I2C), and general-purpose I/O. Microcontrollers sit at the foundation of embedded systems, hierarchically classified as embedded IC -> MCU -> 8-bit MCU -> PIC18F family -> PIC18F6520. The PIC18F6520 extends the popular PIC18F452 with more RAM, additional I/O, a second serial port, and additional timers and CCP modules while remaining upward-software-compatible with PIC16 and PIC17 devices.
Key features include 52 digital I/O pins (54 total I/O per datasheet summary), a 10-bit ADC with up to 16 channels, two enhanced USART modules, MSSP (SPI/I2C), three timers, two Capture/Compare/PWM modules, two comparators, and a parallel slave port. The PIC18F6520 uses an enhanced Harvard RISC architecture with hardware multiplier and 16-bit instructions, achieving 10 MIPS throughput at 40 MHz. In-circuit debugging and ICSP (In-Circuit Serial Programming) are supported via MPLAB ICD and the ICSP interface.
Typical applications include industrial control systems, automotive body and HVAC modules, consumer appliances, home automation, USB-to-UART bridges, sensor hubs, display controllers, and low-end graphical user interfaces. The wide peripheral set, large I/O count, and generous memory make it a strong fit for human-machine interface (HMI) controllers and multi-protocol gateway designs.
Design considerations include decoupling on AVDD/AVSS for ADC accuracy, brown-out reset (BOR) configuration via configuration bits, and watchdog timer (WDT) enable for safety-critical applications. Migrating from PIC18F452 code is straightforward via MPLAB XC8.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho PIC18F6520-I/PT — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC18F6520-I/PT (cùng hình factor và footprint) — khác nhau ở Timers, Package, Core Architecture, ADC, Operating Temperature.
PIC18F6620-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F6720-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F6520-E/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F8520-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F8720-I/PT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F458-I/PT
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F4685-I/PT
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC18F6520-I/PT Tỷ lệ tối đa & tính chất điện
| Core Architecture | 8-bit PIC18 enhanced Harvard RISC |
| Family | PIC18F6x2x |
| Maximum Clock Speed | 40 MHz |
| Program Memory (Flash) | 32 KB (16K x 16) |
| Data RAM | 2 KB (2048 bytes) |
| EEPROM | 1 KB (1024 bytes) |
| I/O Pins | 52 (54 per datasheet summary) |
| ADC | 10-bit, up to 16 channels |
| Supply Voltage (Vdd) | 4.2 V to 5.5 V |
| Nhiệt độ hoạt động | -40C to +85C (Industrial, "I" grade) |
| Hộp | 64-TQFP (10x10 mm) |
| Kiểu lắp đặt | Surface Mount |
| Communication Interfaces | 2x USART (EUSART), MSSP (SPI/I2C) |
| Timers | 3 (Timer0/1/2) |
| Capture/Compare/PWM | 2 CCP modules |
| Comparators | 2 |
| Parallel Slave Port | Yes |
| ICSP / In-Circuit Debug | Yes |
| Trạng thái RoHS | Compliant |
| Cấp MSL | 3 |
Cấu hình chân PIC18F6520-I/PT
| Chân 1 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| Chân 2 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| Chân 3 | RA2/AN2/VREF- — PORTA bit 2 / Analog input 2 / VREF- |
| Chân 4 | RA3/AN3/VREF+ — PORTA bit 3 / Analog input 3 / VREF+ |
| Chân 5 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Chân 6 | RA5/AN4 — PORTA bit 5 / Analog input 4 |
| Chân 7 | RA6/OSC2 — PORTA bit 6 / Oscillator output |
| Chân 8 | RA7/OSC1 — PORTA bit 7 / Oscillator input |
| Chân 9 | RE0/RD/AN5 — PORTE bit 0 / Parallel slave port read |
| Chân 10 | RE1/WR/AN6 — PORTE bit 1 / Parallel slave port write |
| Chân 11 | Vss — Ground |
| Chân 12 | Vdd — Positive supply voltage |
| Chân 13 | RE2/CS/AN7 — PORTE bit 2 / PSP chip select / Analog input 7 |
| Chân 14 | AVdd — Analog positive supply voltage |
| Chân 15 | AVss — Analog ground |
| Chân 16 | RB0/INT0 — PORTB bit 0 / External interrupt 0 |
| Chân 17 | RB1/INT1 — PORTB bit 1 / External interrupt 1 |
| Chân 18 | RB2/INT2 — PORTB bit 2 / External interrupt 2 |
| Chân 19 | RB3/INT3/CCP2A — PORTB bit 3 / External interrupt 3 / CCP2 |
| Chân 20 | RB4 — PORTB bit 4 |
| Chân 21 | RB5 — PORTB bit 5 |
| Chân 22 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Chân 23 | RB7/PGD — PORTB bit 7 / ICSP data |
| Chân 24 | RC0/T1OSO/T13CKI — PORTC bit 0 / Timer1 oscillator output |
| Chân 25 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input |
| Chân 26 | RC2/CCP1 — PORTC bit 2 / CCP1 PWM output |
| Chân 27 | RC3/SCK/SCL — PORTC bit 3 / MSSP SPI clock / I2C clock |
| Chân 28 | RC4/SDI/SDA — PORTC bit 4 / MSSP SPI data in / I2C data |
| Chân 29 | RC5/SDO — PORTC bit 5 / MSSP SPI data out |
| Chân 30 | RC6/TX1/CK1 — PORTC bit 6 / EUSART1 transmit |
| Chân 31 | RC7/RX1/DT1 — PORTC bit 7 / EUSART1 receive |
| Chân 32 | RD0/PSP0 — PORTD bit 0 / Parallel slave port data 0 |
| Chân 33 | RD1/PSP1 — PORTD bit 1 / Parallel slave port data 1 |
| Chân 34 | RD2/PSP2 — PORTD bit 2 / Parallel slave port data 2 |
| Chân 35 | RD3/PSP3 — PORTD bit 3 / Parallel slave port data 3 |
| Chân 36 | RD4/PSP4 — PORTD bit 4 / Parallel slave port data 4 |
| Chân 37 | RD5/PSP5 — PORTD bit 5 / Parallel slave port data 5 |
| Chân 38 | RD6/PSP6 — PORTD bit 6 / Parallel slave port data 6 |
| Chân 39 | RD7/PSP7 — PORTD bit 7 / Parallel slave port data 7 |
| Chân 40 | Vss — Ground |
| Chân 41 | Vdd — Positive supply voltage |
| Chân 42 | RF0/CVREF — PORTF bit 0 / Comparator voltage reference |
| Chân 43 | RF1/AN8 — PORTF bit 1 / Analog input 8 |
| Chân 44 | RF2/AN9 — PORTF bit 2 / Analog input 9 |
| Chân 45 | RF3/AN10 — PORTF bit 3 / Analog input 10 |
| Chân 46 | RF4/AN11 — PORTF bit 4 / Analog input 11 |
| Chân 47 | RF5/AN12/C2OUT — PORTF bit 5 / Analog input 12 / Comparator 2 output |
| Chân 48 | RF6/AN13/C1OUT — PORTF bit 6 / Analog input 13 / Comparator 1 output |
| Chân 49 | RF7/AN14 — PORTF bit 7 / Analog input 14 |
| Chân 50 | RG0/C3OUT — PORTG bit 0 / Comparator 3 output |
| Chân 51 | RG1/TX2/CK2 — PORTG bit 1 / EUSART2 transmit |
| Chân 52 | RG2/RX2/DT2 — PORTG bit 2 / EUSART2 receive |
| Chân 53 | RG3/CCP3 — PORTG bit 3 / CCP3 module |
| Chân 54 | RG4/AN15 — PORTG bit 4 / Analog input 15 |
| Chân 55 | RG5 — PORTG bit 5 |
| Chân 56 | RH0/A16 — PORTH bit 0 / External memory address 16 |
| Chân 57 | RH1/A17 — PORTH bit 1 / External memory address 17 |
| Chân 58 | RH2/A18 — PORTH bit 2 / External memory address 18 |
| Chân 59 | RH3/A19 — PORTH bit 3 / External memory address 19 |
| Chân 60 | MCLR/Vpp — Master clear / ICSP programming voltage |
| Chân 61 | Vss — Ground |
| Chân 62 | Vdd — Positive supply voltage |
| Chân 63 | RH4 — PORTH bit 4 |
| Chân 64 | RH5 — PORTH bit 5 |
Ứng dụng tiêu biểu
PIC18F6520-I/PT phù hợp cho 6 Áp dụngs: Industrial Control PLC, Human-Machine Interface (HMI), Automotive Body & HVAC Modules, Consumer Appliance Control, Multi-Protocol Sensor Gateway, USB-to-UART Bridge Dongle.
Industrial Control PLC
The PIC18F6520-I/PT fits industrial PLC and process-control applications because it provides 52 digital I/O lines to drive relays, optocouplers, and discrete indicators, plus a 16-channel 10-bit ADC to read 4-20 mA or 0-10 V sensor signals. Its 40 MHz core delivers 10 MIPS, easily handling Modbus RTU slave stacks on either of the two EUSART ports, while 32 KB Flash supports small ladder-logic interpreters or PID control firmware. The industrial -40C to +85C temperature rating allows deployment in factory-floor cabinets without additional thermal hardening.
Được đề xuất
Human-Machine Interface (HMI)
For HMI panels with character LCDs, keypads, and rotary encoders, the PIC18F6520-I/PT offers the right balance of I/O count, memory, and computational throughput. The 32 KB Flash accommodates menu trees and bitmap fonts, while the two EUSART modules interface with touch controllers and host PLCs simultaneously. The parallel slave port (PSP) enables high-throughput parallel updates to graphic LCDs without CPU overhead. Industrial temperature rating ensures reliable operation in control cabinet environments alongside other heat-generating electronics.
Được đề xuất
Automotive Body & HVAC Modules
The PIC18F6520-I/PT is well-suited for non-safety automotive body controllers, HVAC panels, and instrument-cluster sub-modules. Its 52 I/O drive window lift switches, mirror controls, and LED backlights directly, while the two USART ports handle LIN bus communication and diagnostic interfaces. With proper external protection (TVS diodes, load dump protection), the MCU operates reliably across automotive temperature and electrical transients. For CAN-enabled variants, consider the PIC18F4685 family drop-in alternative with an integrated CAN module in the same 64-TQFP footprint.
Được đề xuất
Consumer Appliance Control
In washing machines, dishwashers, ovens, and refrigerators, the PIC18F6520-I/PT drives user interfaces, triac-fired loads, and sensor readouts at a competitive cost point. The 16-channel ADC monitors temperature (NTC/PTC), water level, and motor current, while the two CCP modules generate PWM signals for variable-speed motor drives or heater PID loops. 32 KB Flash supports appliance-grade firmware with self-test diagnostics, fault logging, and capacitive-touch sensing libraries via the MSSP peripheral.
Được đề xuất
Multi-Protocol Sensor Gateway
The PIC18F6520-I/PT acts as a low-cost sensor-to-cloud gateway aggregating data from SPI, I2C, and UART sensors and forwarding it to a host processor or modem. Two EUSART modules allow simultaneous connections to a sensor bus and a wireless module, while the MSSP handles SPI or I2C sensor arrays. 32 KB Flash accommodates protocol translation logic for Modbus, I2C sensor stacks, and proprietary fieldbus variants. The wide 4.2V to 5.5V supply simplifies integration with industrial 5V sensors and RS-485 transceivers.
Được đề xuất
USB-to-UART Bridge Dongle
In legacy-to-USB bridges for firmware update or service diagnostics, the PIC18F6520-I/PT pairs with a USB-serial IC to provide buffering, command parsing, and protocol framing. The two EUSART ports enable dual-domain bridging (one to legacy RS-232/RS-485 equipment, one to the USB bridge IC), and the 2 KB RAM buffers incoming packets before forwarding. Industrial temperature rating ensures operation in field-service tools across climate ranges.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18F6520-I/PT — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | PIC18F6620-I/PT | PIC18F6720-I/PT | PIC18F6520-E/PT | PIC18F8520-I/PT | PIC18F4685-I/PT |
|---|---|---|---|---|---|---|
| Package | TQFP-64 (10x10 mm) | TQFP-64 (10x10 mm) - same | TQFP-64 (10x10 mm) - same | TQFP-64 (10x10 mm) - same | TQFP-80 - different | TQFP-64 (10x10 mm) - same |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Core | PIC18 8-bit, 40 MHz | PIC18 8-bit, 40 MHz | PIC18 8-bit, 40 MHz | PIC18 8-bit, 40 MHz | PIC18 8-bit, 40 MHz | PIC18 8-bit, 40 MHz |
| Flash | 32 KB | 64 KB | 128 KB | 32 KB | 32 KB | 96 KB |
| RAM | 2 KB | 4 KB | 3.8 KB | 2 KB | 2 KB | 3.8 KB |
| I/O Pins | 52 | 52 | 52 | 52 | 68 | 52 |
| Temperature Grade | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +85C | Extended -40C to +125C | Industrial -40C to +85C | Industrial -40C to +85C |
| CAN Module | No | No | No | No | No | Yes (CAN 2.0B) |
Bảo phân biệt quan trọng
- Lowest-cost 64-TQFP option in the PIC18F6x20 family (vsPIC18F6620-I/PT)
- Industrial temperature range at lower cost vs extended grade (vsPIC18F6520-E/PT)
- Integrated parallel slave port for high-speed LCD/peripheral interfacing (vsPIC18F458-I/PT)
Ghi chú thiết kế
Decouple both Vdd/Vss pin pairs (pins 12/11, 41/40, 62/61) with 100 nF ceramic capacitors placed within 5 mm of the pins. AVdd (pin 14) and AVss (pin 15) require a separate 10 uF bulk plus 100 nF ceramic to achieve datasheet ADC SNR; sharing AVss with digital Vss creates ground bounce that corrupts ADC readings. Add a 10 uF tantalum or ceramic bulk capacitor near the ICSP/MCLR pin (60) to suppress programming-voltage transients during in-circuit programming.
Route the crystal traces to OSC1/OSC2 (pins 7/8) as short, symmetrical lengths surrounded by a ground guard ring to minimize EMI pickup. Place the 22 pF crystal load capacitors within 3 mm of the OSC pins. For high-speed designs using a 40 MHz oscillator, place a 100 ohm series resistor in each OSC trace to dampen over/undershoot. The ICSP/PGD/PGC pins (23/22) must be accessible without crossing other signal traces to support in-circuit debug.
Do not leave MCLR floating - tie it to Vdd through a 10 kohm resistor or drive it actively to avoid spurious resets. Configuration bits must be set explicitly: enable the watchdog timer (WDT) for safety-critical applications, configure BOR voltage for the expected Vdd range, and disable low-voltage programming if not used. The PIC18F6520 has a maximum Vdd of 5.5 V - exceeding this during hot-plug events or load-dump transients will permanently damage the part; add a TVS diode on the supply rail.
Thông tin tuân thủ
RoHS and lead-free per Microchip product page; not AEC-Q100 qualified - select PIC18F46Jxx or PIC18F4685 family for automotive-grade variants. REACH compliance declared by Microchip.
