PIC18LF8520-I/PT - 8-bit PIC MCU, 32KB Flash, 80-TQFP | Microchip
料号： PIC18LF8520-I/PT ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $13.85 | $13.85 |
| 10 | $12.65 | $126.50 |
| 100 | $11.1 | $1,110.00 |
| 500 | $10.05 | $5,025.00 |
| 1,000 | $9.2 | $9,200.00 |
PIC18LF8520-I/PT 概述
What is a PIC18 microcontroller? A PIC18 is Microchip's 8-bit Harvard-architecture MCU family that combines a 16-bit instruction word with 8-bit data paths, native C-compiler support (MPLAB XC8), on-chip Flash and EEPROM, and a broad peripheral set. PIC18 sits in the taxonomy: PIC18 -> 8-bit MCU -> microcontroller -> embedded IC. The LF prefix denotes the low-voltage variant optimized for 1.8V-3.3V operation while still functioning up to 5V.
Key features include 32KB self-programmable Flash with ICD, 256-byte data EEPROM, two enhanced USART ports for simultaneous communication, MSSP supporting both SPI and I2C master/slave, four timer modules with capture/compare/PWM, a 10-bit multi-channel A/D converter, and nanoWatt power management with multiple idle/sleep modes. The wide voltage range and -40C to +85C industrial temperature grade suit battery-backed and industrial embedded designs.
Architecturally, the PIC18LF8520 employs a 16-bit instruction path with 8-bit data bus, hardware multiply, and a deeply pipelined execution engine, allowing 10 MIPS sustained throughput. The LF silicon process supports deep-sleep currents measured in nanoamps, with wake-up via interrupts, RTCC, or watchdog timer, making the part attractive for energy-harvesting and always-on sensor nodes.
Typical applications include industrial control panels, automotive body and HVAC subsystems, home appliances, HVAC thermostats, data loggers, and human-machine interface (HMI) terminals. The 68 I/O count and dual-USART configuration make it ideal for bridging multiple sensor and actuator buses in embedded systems requiring robust 8-bit determinism.
When designing with this MCU, allocate adequate decoupling (100 nF per VDD pin plus 10 uF bulk) and route the MCLR reset line with proper filtering. The device supports in-circuit serial programming (ICSP) via RB6/RB7, allowing field firmware updates without removing the part from the board.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes for the PIC18LF8520-I/PT, complementing the manufacturer datasheet with engineering guidance and parametric cross-reference data.
直接替换替代料： PIC18LF8520-I/PT ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： PIC18LF8520-I/PT （相同外形与封装尺寸） ——差异在于 Package, I/O Pins, Operating Temperature, ADC, Core Architecture.
快速对比工具——选择替代料号进行并排对比：
PIC18LF8520T-I/PT
✅ 直接替换📋 参考替代料（不在目录中）
PIC18F8520-I/PT
✅ 直接替换✓ 有现货
$5.1586 / 个
查看数据手册 →PIC18LF8525-I/PT
✅ 直接替换✓ 有现货
$5.48 / 个
查看数据手册 →PIC18LF8621-I/PT
✅ 直接替换📋 参考替代料（不在目录中）
PIC18LF6680-I/PT
✅ 直接替换✓ 有现货
$12.85 / 个
查看数据手册 →PIC18LF6722-I/PT
✅ 直接替换✓ 有现货
$8.74 / 个
查看数据手册 →PIC18LF8520-I/PT 最大额定值与电气特性
| Product Type | 8-bit Microcontroller (MCU) |
| Core Architecture | PIC18 (Enhanced RISC, Harvard) |
| Program Memory | 32 KB Flash |
| Data SRAM | 2048 bytes |
| Data EEPROM | 1024 bytes |
| Maximum CPU Speed | 40 MHz (10 MIPS) |
| Supply Voltage (VDD) | 1.8 V to 5.5 V |
| I/O Pins | 68 |
| 封装 | 80-pin TQFP (12x12 mm) |
| 安装类型 | Surface Mount |
| 工作温度 | -40 C to +85 C (Industrial) |
| A/D Converter | 10-bit, multi-channel |
| Communication | 2x USART, MSSP (SPI/I2C) |
| Timers/PWM | 4x Timer modules with CCP/ECCP |
| Power-Saving Modes | nanoWatt technology (Sleep/Idle) |
| In-Circuit Programming | ICSP via RB6/RB7 |
| RoHS 状态 | Compliant |
PIC18LF8520-I/PT 引脚配置
| 引脚 1 | RG0 — Digital I/O port G bit 0 |
| 引脚 2 | RG1 — Digital I/O port G bit 1 |
| 引脚 3 | RG2 — Digital I/O port G bit 2 |
| 引脚 4 | RG3 — Digital I/O port G bit 3 |
| 引脚 5 | RG4 — Digital I/O port G bit 4 |
| 引脚 6 | VDD — Positive supply voltage |
| 引脚 7 | VSS — Ground reference |
| 引脚 8 | RG5 — Digital I/O port G bit 5 |
| 引脚 9 | VSS — Ground reference |
| 引脚 10 | RF7 — Digital I/O port F bit 7 |
| 引脚 11 | RF6 — Digital I/O port F bit 6 |
| 引脚 12 | RF5 — Digital I/O port F bit 5 |
| 引脚 13 | RF4 — Digital I/O port F bit 4 |
| 引脚 14 | RF3 — Digital I/O port F bit 3 |
| 引脚 15 | RF2 — Digital I/O port F bit 2 |
| 引脚 16 | RF1 — Digital I/O port F bit 1 |
| 引脚 17 | RF0 — Digital I/O port F bit 0 |
| 引脚 18 | AVDD — Analog positive supply |
| 引脚 19 | AVSS — Analog ground |
| 引脚 20 | RA0/AN0 — Digital I/O RA0 / A/D channel 0 |
| 引脚 21 | RA1/AN1 — Digital I/O RA1 / A/D channel 1 |
| 引脚 22 | RA2/AN2 — Digital I/O RA2 / A/D channel 2 |
| 引脚 23 | RA3/AN3 — Digital I/O RA3 / A/D channel 3 |
| 引脚 24 | RA4/AN4 — Digital I/O RA4 / A/D channel 4 |
| 引脚 25 | RA5/AN5 — Digital I/O RA5 / A/D channel 5 |
| 引脚 26 | RA6 — Digital I/O RA6 |
| 引脚 27 | RA7 — Digital I/O RA7 |
| 引脚 28 | VSS — Ground reference |
| 引脚 29 | OSC1 — Crystal oscillator input |
| 引脚 30 | OSC2 — Crystal oscillator output |
| 引脚 31 | VSS — Ground reference |
| 引脚 32 | VDD — Positive supply voltage |
| 引脚 33 | RB0/INT0 — Digital I/O RB0 / external interrupt 0 |
| 引脚 34 | RB1/INT1 — Digital I/O RB1 / external interrupt 1 |
| 引脚 35 | RB2/INT2 — Digital I/O RB2 / external interrupt 2 |
| 引脚 36 | RB3 — Digital I/O RB3 |
| 引脚 37 | RB4 — Digital I/O RB4 |
| 引脚 38 | RB5 — Digital I/O RB5 |
| 引脚 39 | RB6/PGC — Digital I/O RB6 / ICSP clock |
| 引脚 40 | RB7/PGD — Digital I/O RB7 / ICSP data |
| 引脚 41 | MCLR — Master clear (reset, active low) |
| 引脚 42 | VDD — Positive supply voltage |
| 引脚 43 | VSS — Ground reference |
| 引脚 44 | RC0 — Digital I/O port C bit 0 |
| 引脚 45 | RC1 — Digital I/O port C bit 1 |
| 引脚 46 | RC2 — Digital I/O port C bit 2 |
| 引脚 47 | RC3 — Digital I/O port C bit 3 |
| 引脚 48 | RC4 — Digital I/O port C bit 4 |
| 引脚 49 | RC5 — Digital I/O port C bit 5 |
| 引脚 50 | RC6 — Digital I/O port C bit 6 |
| 引脚 51 | RC7 — Digital I/O port C bit 7 |
| 引脚 52 | RD0 — Digital I/O port D bit 0 |
| 引脚 53 | RD1 — Digital I/O port D bit 1 |
| 引脚 54 | RD2 — Digital I/O port D bit 2 |
| 引脚 55 | RD3 — Digital I/O port D bit 3 |
| 引脚 56 | RD4 — Digital I/O port D bit 4 |
| 引脚 57 | RD5 — Digital I/O port D bit 5 |
| 引脚 58 | RD6 — Digital I/O port D bit 6 |
| 引脚 59 | RD7 — Digital I/O port D bit 7 |
| 引脚 60 | VSS — Ground reference |
| 引脚 61 | VDD — Positive supply voltage |
| 引脚 62 | RE0 — Digital I/O port E bit 0 |
| 引脚 63 | RE1 — Digital I/O port E bit 1 |
| 引脚 64 | RE2 — Digital I/O port E bit 2 |
| 引脚 65 | RE3 — Digital I/O port E bit 3 |
| 引脚 66 | RE4 — Digital I/O port E bit 4 |
| 引脚 67 | RE5 — Digital I/O port E bit 5 |
| 引脚 68 | RE6 — Digital I/O port E bit 6 |
| 引脚 69 | RE7 — Digital I/O port E bit 7 |
| 引脚 70 | VSS — Ground reference |
| 引脚 71 | VDD — Positive supply voltage |
| 引脚 72 | RH0 — Digital I/O port H bit 0 |
| 引脚 73 | RH1 — Digital I/O port H bit 1 |
| 引脚 74 | RH2 — Digital I/O port H bit 2 |
| 引脚 75 | RH3 — Digital I/O port H bit 3 |
| 引脚 76 | RH4 — Digital I/O port H bit 4 |
| 引脚 77 | RH5 — Digital I/O port H bit 5 |
| 引脚 78 | RH6 — Digital I/O port H bit 6 |
| 引脚 79 | RH7 — Digital I/O port H bit 7 |
| 引脚 80 | RJ7 — Digital I/O port J bit 7 |
典型应用
PIC18LF8520-I/PT 适用于 6 应用s: Industrial Control Panels, HVAC Thermostats and Climate Control, Automotive Body and HVAC Modules, Home Appliance Control Boards, Data Loggers and Sensor Hubs, Human-Machine Interface (HMI) Terminals.
Industrial Control Panels
The PIC18LF8520-I/PT suits industrial control panels with its 68 I/O count, dual USART for HMI master/slave links, and 32 KB Flash for ladder-logic-style firmware. Its 1.8V-5.5V supply range accepts both 3.3V regulated rails and 5V backplanes, while the -40C to +85C industrial grade tolerates cabinet and factory-floor temperatures. The 10-bit A/D reads panel-mounted sensor trims and potentiometers; CCP PWM channels drive indicator LED dimming and buzzer tones. With nanoWatt idle modes, the MCU can manage background panel polling while drawing only nanoamps, extending product life in unattended installations. The 80-pin TQFP footprint provides sufficient I/O headroom for matrix keypads, character LCD interfaces, and discrete optocoupler inputs typical of PLC-style panels.
推荐
HVAC Thermostats and Climate Control
The PIC18LF8520-I/PT is a strong fit for HVAC thermostats where multiple temperature sensors, humidity probes, and user-interface switches must be polled reliably. Its 10-bit A/D handles NTC thermistor bridges and analog humidity sensors, while two USARTs link a wall-mounted display board and a remote communication module. The 1.8V low-voltage operation enables direct battery or energy-harvesting supply from thermoelectric sources, and nanoWatt sleep currents under 100 nA preserve coin-cell life during idle periods. ECCP PWM modules drive TRIAC phase-control outputs for line-voltage heating/cooling stages. The wide operating temperature range of -40C to +85C covers attic and unconditioned-space installations where thermostats are commonly deployed.
推荐
Automotive Body and HVAC Modules
In automotive body controllers and HVAC head units, the PIC18LF8520-I/PT delivers the I/O count and communication flexibility required for driving multiple motors, fans, and indicator lamps. Its dual USART interfaces to LIN bus transceivers or CAN bridge ICs, while CCP/ECCP modules generate PWM for blower motor speed control and lighting dimming. The 32 KB Flash accommodates LIN/J2602 stack firmware plus application logic. -40C to +85C operation is suitable for cabin and engine-bay-adjacent mounting. For underhood modules requiring 125C support, Microchip's PIC18F-K series with AEC-Q100 qualification is the recommended upgrade; the PIC18LF8520 remains ideal for non-safety body and HVAC functions.
推荐
Home Appliance Control Boards
The PIC18LF8520-I/PT powers white-goods controllers in washing machines, dishwashers, and refrigerators where motor control, sensor interfaces, and user display coordination run concurrently. Its four timer/capture modules handle triac-based heater phase control, motor tach feedback, and encoder inputs. 32 KB Flash holds state-machine firmware and diagnostics, while 2048 bytes of SRAM buffers display strings and sensor histories. Dual USARTs link to inverter boards and Wi-Fi/Bluetooth modules for IoT-connected appliances. The 80-pin TQFP gives designers room for segmented LCD drive, buzzer PWM, and safety-relay outputs. -40C to +85C operation covers garage and unheated laundry-room installations.
推荐
Data Loggers and Sensor Hubs
The PIC18LF8520-I/PT is well-suited for industrial data loggers that periodically sample sensors, timestamp entries, and store results to external EEPROM or SD cards. Its 10-bit A/D reads analog process variables, while MSSP (SPI) drives SD card interfaces at high speed, and the second USART outputs data to radios or wired telemetry. nanoWatt sleep currents below 1 uA enable multi-year battery life on duty-cycled logging intervals (e.g., 1 sample per minute). The 1024-byte data EEPROM stores configuration parameters non-volatilely without external storage. ICSP allows field firmware updates without dismantling deployed units, critical for remote environmental monitoring stations and utility metering infrastructure.
推荐
Human-Machine Interface (HMI) Terminals
The PIC18LF8520-I/PT drives HMI terminals that combine character or graphical LCDs, matrix keypads, status LEDs, and serial links to host controllers. With 68 I/O and dual USART, it can simultaneously drive a 4x20 character LCD via parallel port, scan a 4x4 keypad via analog mux inputs, and maintain a Modbus RTU link to a PLC. The 10-bit A/D reads potentiometer settings and analog trim pots. nanoWatt sleep modes reduce quiescent draw when the HMI is idle but still powered, saving energy in 24/7 industrial environments. The 80-pin TQFP and ample Flash make it a cost-effective alternative to higher-pin-count ARM Cortex-M parts for non-graphical HMI screens.
推荐
推荐产品汇总
工程参考数据： PIC18LF8520-I/PT ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | PIC18LF8520T-I/PT | PIC18F8520-I/PT | PIC18LF8525-I/PT | PIC18LF8621-I/PT | PIC18LF6680-I/PT |
|---|---|---|---|---|---|---|
| Package | 80-TQFP (12x12 mm) | 80-TQFP (same) | 80-TQFP (same) | 80-TQFP (same) | 80-TQFP (same) | 80-TQFP (same) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 32 KB | 32 KB | 32 KB | 48 KB | 64 KB | 16 KB |
| Data SRAM | 2048 bytes | 2048 bytes | 2048 bytes | 3328 bytes | 3936 bytes | 1024 bytes |
| Supply Voltage Range | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 4.2 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 2.0 V to 5.5 V |
| Maximum CPU Speed | 40 MHz (10 MIPS) | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| I/O Pins | 68 | 68 | 68 | 68 | 68 | 68 |
| Communication | 2x USART, MSSP (SPI/I2C) | 2x USART, MSSP | 2x USART, MSSP | 2x USART, MSSP | 2x USART, 2x MSSP | 2x USART, MSSP |
| 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 |
关键差异点
- Industry-standard 80-pin TQFP pinout shared across PIC18F85xx family （对比 PIC18LF45K50-I/PT)
- Wide 1.8V-5.5V supply range covers both battery-backed and legacy 5V designs （对比 PIC18F8520-I/PT (F variant))
- nanoWatt technology with sub-microamp sleep current （对比 PIC18LF6680-I/PT)
设计说明
Place a 100 nF ceramic decoupling capacitor on every VDD/AVDD pin and a single 10 uF bulk tantalum or ceramic capacitor at the supply entry point. The PIC18LF8520 has multiple VDD pairs distributed across the 80-pin TQFP; missing any pair causes supply droop during current spikes and can trigger unexpected brown-out resets. Use a star-ground topology with separate analog (AVSS) and digital (VSS) returns tied at a single point near the MCU.
Do not leave the MCLR pin floating. Tie MCLR to VDD through a 10 kohm pull-up resistor and place a 100 nF capacitor to VSS close to the pin for noise immunity. Floating MCLR is the most common cause of spurious resets in PIC18F designs. The ICSP clock and data pins (RB6/PGC, RB7/PGD) are shared with general I/O and must be free of strong pull-ups/downs during programming to avoid contention with the programmer.
Route the crystal/oscillator traces (OSC1/OSC2) symmetrically and keep them short with a guard ring tied to VSS to minimize coupling. Place the crystal within 5-10 mm of the MCU; longer traces increase jitter and EMI. For high-EMI environments, use a 4-layer PCB with a dedicated ground plane beneath the oscillator traces and avoid routing signal lines under the crystal footprint.
The PIC18LF8520-I/PT in 80-TQFP has a thermal resistance of approximately 50 C/W (theta_JA), suitable for typical embedded loads (under 50 mA) without special thermal management. At maximum CPU activity and 40 MHz, supply current is roughly 15-20 mA, dissipating under 100 mW at 5 V - well within thermal limits. For sustained full-load at 5 V in enclosed housings, provide at least 1 square inch of copper pour beneath the exposed pad row for additional heat spreading.
合规信息
RoHS/REACH compliance per Microchip product page. Industrial temperature grade -40C to +85C (suffix -I). Not AEC-Q100 qualified; for AEC-Q100 automotive use, select PIC18F-K series variants.