PIC18LF6520T-I/PT - 40MHz 8-bit MCU 32KB Flash 64-TQFP | Microchip
MPN: PIC18LF6520T-I/PT ✓ نشطPIC18LF6520T-I/PT نظرة عامة
An 8-bit microcontroller (MCU) is a single-chip processor with an 8-bit data path, on-board Flash program memory, RAM, and a rich set of peripherals (timers, ADC, UART, I2C, SPI, PWM). PIC18F/LF-series MCUs sit at the upper end of Microchip's 8-bit portfolio (PIC16 -> PIC18 -> PIC32), delivering 10 MIPS performance with Harvard RISC architecture and 16-bit instructions. PIC18LF variants support a wide 2.0V-5.5V operating range for low-voltage and battery-powered designs.
Key features of the PIC18LF6520T-I/PT include: 40 MHz maximum clock (10 MIPS), 32 KB self-programmable Flash, 2 KB RAM, 1 KB data EEPROM, 54 I/O pins with individual direction control, multiple serial interfaces (2x USART, MSSP for SPI/I2C), two 8-bit and three 16-bit timers, 10-bit ADC up to 15 channels, two analog comparators, dual capture/compare/PWM modules, and a hardware 8x8 multiplier. The wide 2.0V-5.5V operating range enables single-rail designs from two AA cells to 5V industrial buses.
Architecturally, the device uses Microchip's enhanced Harvard architecture with separate program and data buses, 32-level deep hardware stack, and a priority-interrupt controller supporting both legacy PIC16/PIC17 software migration and native PIC18 C development under MPLAB X with XC8. The 'LF' suffix designates the wide-voltage (2.0V-5.5V) variant, while 'T' in the MPN denotes tape-and-reel packaging and 'I' denotes industrial temperature grade.
Typical applications include industrial control panels, HVAC controllers, motor control driver boards, low-power sensor hubs, USB-to-UART bridges, and home appliances. Designers benefit from decades of PIC18 code compatibility and broad third-party library support. When designing with this part, verify that your VDD rail stays within 2.0V-5.5V and use the internal 8 MHz RC oscillator or an external crystal up to 40 MHz depending on MIPS requirements. The 64-TQFP package provides ample I/O for parallel bus or matrix keypad interfaces. This page synthesizes distributor pricing, drop-in alternatives and practical design notes not found in the bare manufacturer datasheet.
بدائل مباشرة لـ PIC18LF6520T-I/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 PIC18LF6520T-I/PT (نفس عامل الشكل والبصمة) — يختلف في Package, Timers, Core Architecture, Program Memory (Flash), ADC.
PIC18LF6520-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18LF6520T-I/PTG
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
PIC18LF6527T-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18LF6525T-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18LF8627T-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18F67J10-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18LF6520T-I/PT الحدود القصوى والخصائص الكهربائية
| Core Architecture | PIC18 (8-bit Harvard RISC) |
| Maximum CPU Clock | 40 MHz (10 MIPS) |
| Program Memory (Flash) | 32 KB (16K x 16) |
| Data SRAM | 2 KB |
| Data EEPROM | 1 KB |
| Supply Voltage (VDD) | 2.0 V to 5.5 V |
| I/O Pins | 54 |
| العلبة | TQFP-64 (10 x 10 mm) |
| نوع التركيب | Surface Mount |
| درجة حرارة التشغيل | -40 C to +85 C (Industrial) |
| ADC | 10-bit, up to 15 channels |
| Timers | 2 x 8-bit, 3 x 16-bit |
| Capture/Compare/PWM | 2 CCP modules |
| Serial Interfaces | 2 x USART (AUSART), MSSP (SPI / I2C) |
| Analog Comparators | 2 |
| Hardware Multiplier | 8 x 8 single-cycle |
| Instruction Set | PIC18 (16-bit opcodes) |
| حالة RoHS | Compliant (Pb-free) |
تكوين أطراف PIC18LF6520T-I/PT
| دبوس 1 | OSC2/CLKO/RA6 — Oscillator output / general I/O |
| دبوس 2 | OSC1/CLKI/RA7 — Oscillator input / general I/O |
| دبوس 3 | MCLR — Master Clear (reset) input |
| دبوس 4 | RA0/AN0 — Digital I/O / analog input 0 |
| دبوس 5 | RA1/AN1 — Digital I/O / analog input 1 |
| دبوس 6 | RA2/AN2/VREF- — Digital I/O / analog input 2 / VREF- |
| دبوس 7 | RA3/AN3/VREF+ — Digital I/O / analog input 3 / VREF+ |
| دبوس 8 | RA4/T0CKI — Digital I/O / Timer0 clock input |
| دبوس 9 | RA5/AN4/SS — Digital I/O / analog input 4 / SPI slave select |
| دبوس 10 | VSS — Ground reference |
| دبوس 11 | VDD — Positive supply voltage (2.0V-5.5V) |
| دبوس 12 | RB0/INT0 — Digital I/O / external interrupt 0 |
| دبوس 13 | RB1/INT1 — Digital I/O / external interrupt 1 |
| دبوس 14 | RB2/INT2 — Digital I/O / external interrupt 2 |
| دبوس 15 | RB3/INT3/CCP2 — Digital I/O / external interrupt 3 / CCP2 |
| دبوس 16 | RB4/INT4 — Digital I/O / external interrupt 4 |
| دبوس 17 | RB5/INT5 — Digital I/O / external interrupt 5 |
| دبوس 18 | RB6/PGC — Digital I/O / ICSP clock |
| دبوس 19 | RB7/PGD — Digital I/O / ICSP data |
| دبوس 20 | VSS — Ground reference |
| دبوس 21 | VDD — Positive supply voltage (2.0V-5.5V) |
| دبوس 22 | RC0/T1OSO/T1CKI — Digital I/O / Timer1 oscillator output / clock input |
| دبوس 23 | RC1/T1OSI/CCP2 — Digital I/O / Timer1 oscillator input / CCP2 |
| دبوس 24 | RC2/CCP1 — Digital I/O / CCP1 PWM output |
| دبوس 25 | RC3/SCK/SCL — Digital I/O / SPI clock / I2C clock |
| دبوس 26 | RC4/SDI/SDA — Digital I/O / SPI data in / I2C data |
| دبوس 27 | RC5/SDO — Digital I/O / SPI data out |
| دبوس 28 | RC6/TX/CK — Digital I/O / USART TX / clock |
| دبوس 29 | RC7/RX/DT — Digital I/O / USART RX / data |
| دبوس 30 | VSS — Ground reference |
| دبوس 31 | VDD — Positive supply voltage (2.0V-5.5V) |
| دبوس 32 | RD0/PSP0 — Digital I/O / parallel slave port 0 |
| دبوس 33 | RD1/PSP1 — Digital I/O / parallel slave port 1 |
| دبوس 34 | RD2/PSP2 — Digital I/O / parallel slave port 2 |
| دبوس 35 | RD3/PSP3 — Digital I/O / parallel slave port 3 |
| دبوس 36 | RD4/PSP4 — Digital I/O / parallel slave port 4 |
| دبوس 37 | RD5/PSP5 — Digital I/O / parallel slave port 5 |
| دبوس 38 | RD6/PSP6/TX2 — Digital I/O / PSP6 / USART2 TX |
| دبوس 39 | RD7/PSP7/RX2 — Digital I/O / PSP7 / USART2 RX |
| دبوس 40 | VSS — Ground reference |
| دبوس 41 | VDD — Positive supply voltage (2.0V-5.5V) |
| دبوس 42 | RE0/RD — Digital I/O / parallel port read control |
| دبوس 43 | RE1/WR — Digital I/O / parallel port write control |
| دبوس 44 | RE2/CS — Digital I/O / parallel port chip select |
| دبوس 45 | VSS — Ground reference |
| دبوس 46 | VDD — Positive supply voltage (2.0V-5.5V) |
| دبوس 47 | RF0/AN5 — Digital I/O / analog input 5 |
| دبوس 48 | RF1/AN6/C2OUT — Digital I/O / analog input 6 / comparator 2 output |
| دبوس 49 | RF2/AN7/C1OUT — Digital I/O / analog input 7 / comparator 1 output |
| دبوس 50 | RF3/AN8 — Digital I/O / analog input 8 |
| دبوس 51 | RF4/AN9 — Digital I/O / analog input 9 |
| دبوس 52 | RF5/AN10/CVREF — Digital I/O / analog input 10 / comparator VREF |
| دبوس 53 | RF6/AN11 — Digital I/O / analog input 11 |
| دبوس 54 | RF7/AN12 — Digital I/O / analog input 12 |
| دبوس 55 | RG0 — Digital I/O (PORTG) |
| دبوس 56 | RG1 — Digital I/O (PORTG) |
| دبوس 57 | RG2 — Digital I/O (PORTG) |
| دبوس 58 | RG3 — Digital I/O (PORTG) |
| دبوس 59 | RG4 — Digital I/O (PORTG) |
| دبوس 60 | AVSS — Analog ground reference |
| دبوس 61 | AVDD — Analog positive supply |
| دبوس 62 | RH0/AN13 — Digital I/O / analog input 13 |
| دبوس 63 | RH1/AN14 — Digital I/O / analog input 14 |
| دبوس 64 | RH2 — Digital I/O (PORTH) |
التطبيقات النموذجية
PIC18LF6520T-I/PT مناسب لـ 6 التطبيقs: Industrial Control Panels, HVAC and Climate Controllers, Low-Power Sensor Hubs, Motor Control Driver Boards, Home Appliance Control Boards, USB-to-UART Bridge and Serial Protocol Converter.
Industrial Control Panels
The PIC18LF6520T-I/PT fits industrial control panels because of its 54 digital I/O pins (sufficient for 4x4 matrix keypads, 7-segment or character LCD bus, and 16-24 optocoupled output relays), 2.0V-5.5V wide VDD tolerance that survives brown-outs on 24 V industrial rails, and the 40 MHz 10 MIPS throughput that runs Modbus RTU or PROFIBUS-style protocols in real time. It also provides a 10-bit ADC with 15 channels for analog transducer inputs (4-20 mA, 0-10 V, RTD/thermocouple amplifiers) plus two analog comparators for over-current/over-voltage detection. The 32 KB Flash holds full state machines, the 2 KB SRAM supports Modbus buffers and a 1 KB EEPROM stores calibration setpoints without battery backup.
موصى به
HVAC and Climate Controllers
The PIC18LF6520T-I/PT is well-suited to HVAC and climate-control thermostats thanks to its 10-bit ADC for multiple temperature/humidity sensor inputs, the dual CCP/PWM modules that drive fan triacs, damper servos and compressor relays, and the wide 2.0V-5.5V supply that survives transient drops from relay coils. The 32 KB Flash holds PID control loops, scheduling tables, and a display UI menu, while the 1 KB EEPROM retains user-set temperature curves across power cycles. The 54 I/O interface directly to character LCDs, keypads, and a UART-connected Wi-Fi or Sub-GHz module. Compared with discrete 8051 solutions, this part gives a single-chip BOM with on-board EEPROM and analog comparators.
موصى به
Low-Power Sensor Hubs
The PIC18LF6520T-I/PT is a strong fit for low-power sensor hubs that aggregate analog/digital sensor data and forward it via UART, SPI or I2C to a host or radio. The 'LF' (2.0V-5.5V) wide-voltage range allows direct operation from a 3.3 V LDO, and the 2 KB SRAM plus 32 KB Flash comfortably hold buffering, averaging, and protocol stacks. Two USARTs plus MSSP (SPI/I2C) permit simultaneous connection to a sensor front-end and a wireless module. The 10-bit ADC with up to 15 channels handles multi-sensor inputs (temperature, pressure, light, gas). The 1 KB EEPROM stores calibration constants and device IDs.
موصى به
Motor Control Driver Boards
The PIC18LF6520T-I/PT drives brushed-DC, stepper and small BLDC motors via its dual CCP/PWM modules and 16-bit timers with hardware PWM. The 10 MIPS throughput closes 10 kHz+ current-control loops, while the wide 2.0V-5.5V supply accommodates 3.3 V logic-level gate drivers and 5 V H-bridges equally. The 54 I/O interface to quadrature encoders, Hall sensors, end-stop switches and fault inputs. On-chip analog comparators trigger hardware over-current shutdown, and the 32 KB Flash stores velocity profiles and PI controller tuning. The TQFP-64 package provides ample thermal headroom for the MCU itself even at full MIPS.
موصى به
Home Appliance Control Boards
The PIC18LF6520T-I/PT powers white-goods and small-appliance main boards where 54 I/O, 32 KB Flash and 1 KB EEPROM cover UI panel, sensor array, triac/relay drivers and a real-time clock. The wide VDD range supports both 3.3 V and 5 V designs, simplifying BOM reuse across washing-machine, dishwasher and oven sub-models. The USART enables Wi-Fi/Bluetooth module attachment for smart-appliance variants, while the 10-bit ADC monitors NTC thermistors, water-level probes and door interlocks. The PIC18 architecture's decades-long silicon maturity reduces appliance-class qualification risk.
موصى به
USB-to-UART Bridge and Serial Protocol Converter
The PIC18LF6520T-I/PT, paired with a USB- serial bridge or used with its MSSP and USART peripherals, is a flexible multi-protocol converter (UART to SPI/I2C, RS-232 to RS-485, etc.). The two USARTs allow simultaneous protocol bridging, while the MSSP handles I2C/SPI slave or master roles. The 2 KB SRAM buffers sustained packet traffic, and 32 KB Flash holds Modbus, DMX-512, or custom industrial protocols. The wide 2.0V-5.5V supply interfaces directly with both 3.3 V and 5 V legacy equipment. Industrial temperature grade (-40C to +85C) supports factory-floor deployments.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ PIC18LF6520T-I/PT — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | PIC18LF6520-I/PT | PIC18LF6520T-I/PTG | PIC18LF6527T-I/PT | PIC18LF6525T-I/PT | PIC18LF8627T-I/PT | PIC18F67J10-I/PT |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-64 (10x10 mm) | TQFP-64 (10x10 mm) - same | TQFP-64 (10x10 mm) - same | TQFP-64 (10x10 mm) - same | TQFP-64 (10x10 mm) - same | TQFP-64 (10x10 mm) - same | TQFP-64 (10x10 mm) - same |
| Core / Architecture | PIC18 8-bit 10 MIPS | PIC18 8-bit 10 MIPS | PIC18 8-bit 10 MIPS | PIC18 8-bit 10 MIPS | PIC18 8-bit 10 MIPS | PIC18 8-bit 10 MIPS | PIC18 8-bit 10 MIPS |
| Max CPU Clock | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| Flash Program Memory | 32 KB | 32 KB | 32 KB | 96 KB | 48 KB | 96 KB | 128 KB |
| Data SRAM | 2 KB | 2 KB | 2 KB | 4 KB | 2 KB | 4 KB | 3.8 KB |
| Data EEPROM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB | 0 (none - flash-based emulation) |
| VDD Range | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 3.6 V |
| I/O Pins | 54 | 54 | 54 | 54 | 54 | 70 | 50 |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
أبرز الفروقات
- Wide 2.0V-5.5V VDD range vs standard PIC18F6520 4.2V-5.5V (مقابلPIC18F6520-I/PT)
- Larger Flash and RAM vs the base 32 KB/2 KB (مقابلPIC18LF6527T-I/PT)
- Halogen-free packaging option for IEC 61249-2-21 compliance (مقابلPIC18LF6520T-I/PTG)
- Mass-production tape-and-reel vs prototype tray packaging (مقابلPIC18LF6520-I/PT)
ملاحظات التصميم
Decouple every VDD/VSS pair on the PIC18LF6520T-I/PT with a 100 nF ceramic capacitor placed within 5 mm of the pin pair. The device has four VDD pins (11, 21, 31, 41, 46) and five VSS pins (10, 20, 30, 40, 45) plus separate analog AVDD/AVSS pins (61/60) that should each have their own 100 nF cap. A bulk 10 uF tantalum or aluminum-polymer capacitor near the IC handles the in-rush current of the internal Flash programming pump. The wide 2.0V-5.5V supply permits direct battery or USB operation, but a ferrite bead plus decoupling cap is recommended when the rail is shared with an inductive relay or motor.
Never leave MCLR floating on the PIC18LF6520T-I/PT. Tie MCLR (pin 3) to VDD through a 10 kohm pull-up resistor with a 100 nF cap to ground for noise filtering - omitting the cap or the pull-up is the most common reason a PIC18 will randomly enter reset or fail to start. RB6 (PGC) and RB7 (PGD) must be isolated from external pull-ups stronger than 10 kohm so that the ICSP programmer can drive them during in-circuit programming/debug. The internal 8 MHz RC oscillator drifts over voltage and temperature, so use an external crystal when serial baud rates must remain within 2% over industrial temperature.
Route the 40 MHz oscillator traces (OSC1/OSC2, pins 16 and 15 wait - OSC1/OSC2 are RA6/RA7 at pins 1/2) symmetrically with ground guard traces to avoid injection of harmonics into adjacent analog AN0-AN12 inputs. Keep analog traces away from the digital I/O PORTD parallel-slave-port bus and the PWM CCP outputs. Place the analog VREF+/VREF- decoupling (10 uF + 100 nF) at the RA3/RA2 pins (7/6) to keep ADC readings stable. The exposed thermal pad is not present on the TQFP-64, so use a copper pour connected to VSS beneath the IC for thermal spreading if the device is expected to drive many outputs simultaneously.
When laying out the PIC18LF6520T-I/PT, group ports logically: PORTA for analog, PORTB for ICSP and key inputs, PORTC for serial/SPI, PORTD for parallel slave port or character LCD data, PORTE for PSP control signals, PORTF for additional analog, PORTG for general digital, and PORTH for the remaining analog inputs. This partitioning makes firmware portable to PIC18LF8520/8620/8720 derivatives in the same family. Note that RG0-RG4 (pins 55-59) and RH0-RH2 (pins 62-64) are added on the higher-pin-count variants; leaving these pins as outputs on the 64-pin part is safe but reading them yields indeterminate data.
معلومات الامتثال
RoHS compliant per Microchip product page (Pb-free PT package suffix). The PTG variant adds halogen-free compliance. PIC18LF family is not AEC-Q100 qualified; for automotive, use PIC18F-series Q-qualified parts.
