PIC18LF8620T-I/PT - 64KB Flash 8-bit MCU, 25MHz, 80-TQFP | Microchip
料号： PIC18LF8620T-I/PT ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $8.32 | $8.32 |
| 10 | $7.45 | $74.50 |
| 100 | $6.58 | $658.00 |
| 500 | $5.92 | $2,960.00 |
| 1,000 | $5.27 | $5,270.00 |
PIC18LF8620T-I/PT 概述
Key features include 64KB (32K x 16) of self-programmable Flash, 3840 bytes of SRAM, 1024 bytes of EEPROM, an enhanced 10-bit ADC with up to 16 channels, multiple serial interfaces (USART, I2C, SPI), and Microchip's nanoWatt power management. The 80-pin TQFP footprint exposes 68 general-purpose I/O lines, two capture/compare/PWM modules, and a parallel slave port for external memory expansion, making it well-suited for mixed-signal control applications.
The PIC18LF8620T-I/PT uses Microchip's enhanced Harvard architecture with a 16-bit instruction word and an 8-bit data path, enabling C-friendly operation while preserving deterministic interrupt latency. Its deep peripheral integration reduces BOM count in motor control, instrumentation, and display-driving designs. As the LF variant of the family, it offers the lowest power consumption for battery-backed or portable applications.
Typical applications include industrial automation control panels, HVAC controllers, automotive body electronics, white-goods user-interface boards, and large graphic LCD driving. The 68 I/O count directly supports matrix keypads, segmented character displays, and parallel-port peripherals.
When designing with this device, allocate decoupling capacitors close to all VDD/VSS pairs, follow Microchip's in-circuit serial programming (ICSP) layout rules, and confirm the LF voltage range covers any battery-depleted scenarios. The 'T' suffix denotes Tape & Reel packaging for high-volume assembly.
This page synthesizes distributor pricing, 80-TQFP drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
直接替换替代料： PIC18LF8620T-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： PIC18LF8620T-I/PT （相同外形与封装尺寸） ——差异在于 Package, ADC, EEPROM, I/O Pins, Maximum CPU Speed.
快速对比工具——选择替代料号进行并排对比：
PIC18LF8527T-I/PT
✅ 直接替换✓ 有现货
$4.65 / 个
查看数据手册 →PIC18LF8722T-I/PT
✅ 直接替换📋 参考替代料（不在目录中）
PIC18LF8685T-I/PT
✅ 直接替换📋 参考替代料（不在目录中）
PIC18LF8585T-I/PT
✅ 直接替换📋 参考替代料（不在目录中）
PIC18LF8722-I/PT
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$7.85 / 个
查看数据手册 →PIC18F8722T-I/PT
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
PIC18LF8620T-I/PT 最大额定值与电气特性
| Core Architecture | PIC18 (8-bit, enhanced Harvard) |
| Program Memory (Flash) | 64 KB (32K x 16) |
| Data Memory (SRAM) | 3840 bytes |
| EEPROM | 1024 bytes |
| Maximum CPU Speed | 25 MHz (10 MIPS) |
| Operating Voltage Range | 2.0 V to 5.5 V (LF family) |
| I/O Pins | 68 |
| 封装 | 80-pin TQFP (12 x 12 mm) |
| 工作温度 | -40C to +85C (Industrial) |
| 安装类型 | Surface Mount |
| Packaging | Tape & Reel (T suffix) |
| Peripherals | USART, I2C, SPI, CCP, Parallel Slave Port |
| RoHS 状态 | Compliant |
| Lead-Free | Yes |
PIC18LF8620T-I/PT 引脚配置
| 引脚 1 | MCLR — Master Clear (reset) input, active-low |
| 引脚 2 | RA0 — PORTA bit 0 / analog AN0 |
| 引脚 3 | RA1 — PORTA bit 1 / analog AN1 |
| 引脚 4 | RA2 — PORTA bit 2 / analog AN2 |
| 引脚 5 | RA3 — PORTA bit 3 / analog AN3 / VREF+ |
| 引脚 6 | RA4 — PORTA bit 4 / analog AN4 |
| 引脚 7 | RA5 — PORTA bit 5 / analog AN5 / VREF- |
| 引脚 8 | RA6 — PORTA bit 6 / oscillator |
| 引脚 9 | RA7 — PORTA bit 7 / oscillator |
| 引脚 10 | VDD — Positive supply |
| 引脚 11 | VSS — Ground |
| 引脚 12 | RB0 — PORTB bit 0 / external interrupt |
| 引脚 13 | RB1 — PORTB bit 1 |
| 引脚 14 | RB2 — PORTB bit 2 |
| 引脚 15 | RB3 — PORTB bit 3 |
| 引脚 16 | RB4 — PORTB bit 4 |
| 引脚 17 | RB5 — PORTB bit 5 / ICSP data |
| 引脚 18 | RB6 — PORTB bit 6 / ICSP clock |
| 引脚 19 | RB7 — PORTB bit 7 |
| 引脚 20 | VDD — Positive supply |
| 引脚 21 | VSS — Ground |
| 引脚 22 | RC0 — PORTC bit 0 |
| 引脚 23 | RC1 — PORTC bit 1 / CCP2 |
| 引脚 24 | RC2 — PORTC bit 2 / CCP1 |
| 引脚 25 | RC3 — PORTC bit 3 / SCL |
| 引脚 26 | RC4 — PORTC bit 4 / SDA |
| 引脚 27 | RC5 — PORTC bit 5 / SDO |
| 引脚 28 | RC6 — PORTC bit 6 / TX |
| 引脚 29 | RC7 — PORTC bit 7 / RX |
| 引脚 30 | VDD — Positive supply |
| 引脚 31 | VSS — Ground |
| 引脚 32 | RD0 — PORTD bit 0 / PSP data |
| 引脚 33 | RD1 — PORTD bit 1 / PSP data |
| 引脚 34 | RD2 — PORTD bit 2 / PSP data |
| 引脚 35 | RD3 — PORTD bit 3 / PSP data |
| 引脚 36 | RD4 — PORTD bit 4 / PSP data |
| 引脚 37 | RD5 — PORTD bit 5 / PSP data |
| 引脚 38 | RD6 — PORTD bit 6 / PSP data |
| 引脚 39 | RD7 — PORTD bit 7 / PSP data |
| 引脚 40 | VSS — Ground |
| 引脚 41 | RE0 — PORTE bit 0 / RD control |
| 引脚 42 | RE1 — PORTE bit 1 / WR control |
| 引脚 43 | RE2 — PORTE bit 2 / CS control |
| 引脚 44 | RE3 — PORTE bit 3 |
| 引脚 45 | RE4 — PORTE bit 4 |
| 引脚 46 | RE5 — PORTE bit 5 |
| 引脚 47 | RE6 — PORTE bit 6 |
| 引脚 48 | RE7 — PORTE bit 7 |
| 引脚 49 | VDD — Positive supply |
| 引脚 50 | VSS — Ground |
| 引脚 51 | RF0 — PORTF bit 0 |
| 引脚 52 | RF1 — PORTF bit 1 / analog AN6 |
| 引脚 53 | RF2 — PORTF bit 2 / analog AN7 |
| 引脚 54 | RF3 — PORTF bit 3 / analog AN8 |
| 引脚 55 | RF4 — PORTF bit 4 / analog AN9 |
| 引脚 56 | RF5 — PORTF bit 5 / analog AN10 |
| 引脚 57 | RF6 — PORTF bit 6 / analog AN11 |
| 引脚 58 | RF7 — PORTF bit 7 |
| 引脚 59 | VDD — Positive supply |
| 引脚 60 | VSS — Ground |
| 引脚 61 | RG0 — PORTG bit 0 |
| 引脚 62 | RG1 — PORTG bit 1 |
| 引脚 63 | RG2 — PORTG bit 2 |
| 引脚 64 | RG3 — PORTG bit 3 |
| 引脚 65 | RG4 — PORTG bit 4 |
| 引脚 66 | RG5 — PORTG bit 5 |
| 引脚 67 | RG6 — PORTG bit 6 |
| 引脚 68 | RG7 — PORTG bit 7 |
| 引脚 69 | AVDD — Analog positive supply |
| 引脚 70 | AVSS — Analog ground |
| 引脚 71 | NC — Not connected (per datasheet) |
| 引脚 72 | NC — Not connected (per datasheet) |
| 引脚 73 | OSC1 — Oscillator input |
| 引脚 74 | OSC2 — Oscillator output |
| 引脚 75 | VDD — Positive supply |
| 引脚 76 | VSS — Ground |
| 引脚 77 | NC — Not connected (per datasheet) |
| 引脚 78 | NC — Not connected (per datasheet) |
| 引脚 79 | NC — Not connected (per datasheet) |
| 引脚 80 | NC — Not connected (per datasheet) |
典型应用
PIC18LF8620T-I/PT 适用于 6 应用s: Industrial Automation Control Panel, HVAC Climate Controller, Automotive Body Electronics Module, White Goods User-Interface Board, Large Graphic LCD / Panel Meter Driver, Battery-Backed Sensor Aggregator.
Industrial Automation Control Panel
The PIC18LF8620T-I/PT fits industrial control panels because its 68 I/O pins directly drive matrix keypads, segmented character LCDs, relay banks, and indicator LEDs without external glue logic. The 64 KB Flash accommodates a full Modbus RTU or CANopen state machine plus keypad/HMI libraries, while the 3840-byte SRAM holds protocol buffers and event queues. Operating from 2.0-5.5 V lets the panel ride out supply transients on the 24 V industrial bus. Industrial temperature range -40C to +85C and strong ESD performance suit factory-floor enclosures.
推荐
HVAC Climate Controller
The PIC18LF8620T-I/PT's 10 MIPS throughput and 68 I/O make it well suited for HVAC climate controllers that read multiple NTC thermistors via the 10-bit ADC, drive triac outputs for compressor and fan stages, and sweep an alphanumeric LCD for user feedback. The 64 KB Flash is sufficient for fuzzy-logic and PID control loops with on-screen configuration menus, while 3840 bytes of SRAM handles setpoint schedules and diagnostic logs. The LF 2.0-5.5 V range supports 3.3 V-backed thermostat designs that must keep RTC alive during power dips.
推荐
Automotive Body Electronics Module
The PIC18LF8620T-I/PT is used in body-electronics modules such as central locking, seat-position memory, mirror-fold, and lighting controllers. Its 68 I/O directly multiplex wiper, turn-signal, and courtesy-lamp drivers; the 16-channel 10-bit ADC reads switches and battery sense; and 64 KB Flash fits LIN-stack plus body-control state machines. Note the 'LF' variant is rated -40C to +85C industrial, so for under-hood AEC-Q100 applications choose PIC18F8620-I/PT automotive-grade parts instead.
推荐
White Goods User-Interface Board
The PIC18LF8620T-I/PT drives washing-machine, dishwasher, and oven user-interface boards where a single MCU must scan a 7x7 capacitive keypad, refresh a 14-segment vacuum-fluorescent display, and supervise motor-driver I/O. 64 KB Flash holds appliance-safety firmware (IEC 60730 Class B), 3840 bytes of SRAM buffers cycle data, and 68 I/O eliminates the need for I/O expanders. The 2.0-5.5 V range lets the board share a 3.3 V rail with the wireless/Wi-Fi coprocessor.
推荐
Large Graphic LCD / Panel Meter Driver
The PIC18LF8620T-I/PT's parallel slave port and 68 I/O lines are ideal for driving 320x240 graphic LCDs or TFT panels used in panel meters, lab instruments, and point-of-sale terminals. The PSP allows the MCU to offload pixel data from an external memory buffer while the CPU handles user input, gauge calculations, and serial communications. 64 KB Flash accommodates full-frame buffer libraries and the 2.0-5.5 V range supports 3.3 V LCD rails. Industrial temperature grade suits outdoor instrumentation.
推荐
Battery-Backed Sensor Aggregator
The PIC18LF8620T-I/PT's LF 2.0 V minimum operation and nanoWatt sleep modes suit battery-backed sensor aggregator nodes that spend most of their time asleep, wake to sample, then transmit over UART or SPI. 64 KB Flash fits OTA bootloader plus application, 3840 bytes SRAM holds compressed sensor frames, and 68 I/O multiplexes SPI sensors, UART radios, and discrete status lines. Running down to 2.0 V lets the cell discharge deeper, increasing service life.
推荐
推荐产品汇总
工程参考数据： PIC18LF8620T-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 | PIC18LF8527T-I/PT | PIC18LF8722T-I/PT | PIC18LF8685T-I/PT | PIC18LF8585T-I/PT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 80-TQFP (12x12 mm) | 80-TQFP (12x12 mm) - same | 80-TQFP (12x12 mm) - same | 80-TQFP (12x12 mm) - same | 80-TQFP (12x12 mm) - same |
| Program Memory (Flash) | 64 KB | 48 KB | 128 KB | 96 KB | 48 KB |
| RAM | 3840 bytes | 3840 bytes | 3840 bytes | 3840 bytes | 3840 bytes |
| Operating Voltage | 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 |
| I/O Pins | 68 | 68 | 68 | 68 | 68 |
| Maximum CPU Speed | 25 MHz / 10 MIPS | 40 MHz / 10 MIPS | 40 MHz / 10 MIPS | 40 MHz / 10 MIPS | 40 MHz / 10 MIPS |
| USB Peripheral | No | No | Yes (USB 2.0 FS) | No | No |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
关键差异点
- Highest I/O count in PIC18 LF 80-TQFP family at the LF voltage tier （对比 PIC18LF6520T-I/PT)
- LF voltage range supports 3.3 V and battery-backed designs （对比 PIC18F8620T-I/PT)
- Cost-effective balance of Flash and RAM for non-USB applications （对比 PIC18LF8722T-I/PT)
设计说明
Place a 100 nF decoupling capacitor within 5 mm of every VDD pin and a single 10 uF bulk capacitor near the package. The PIC18LF8620T-I/PT can draw transient currents up to 200 mA on digital edge transitions; bulk capacitance prevents VDD droop that would otherwise corrupt Flash program/erase operations and A/D conversions on the AVdd rail.
Follow Microchip's ICSP layout guidelines: keep the ICSP connector (PGD/PGC/MCLR/VSS) traces short (<50 mm) and isolated from switching signals. Route the 25 MHz oscillator traces symmetrically with ground guard traces and place load capacitors within 5 mm of OSC1/OSC2 to maintain jitter below 50 ps. The 80-TQFP has a center thermal pad that is not internally bonded - it must be soldered to the ground plane for mechanical reliability but does NOT improve thermal dissipation.
Assign analog inputs (RA0-RA5, RF1-RF6) to a contiguous analog block and surround them with an analog ground island tied back to AVss at a single point. Keep switching signals (CCP outputs, oscillator, USART lines) at least 5 mm away from analog traces to minimize digital-coupling noise. Add a 100 nF capacitor on AVdd when the ADC is enabled at full 10-bit resolution across the full LF voltage range.
Do not assume PIC18LF6520T-I/PT (64-TQFP) and PIC18LF8620T-I/PT (80-TQFP) are interchangeable - they share silicon family but differ in pin count and pinout. Always verify the voltage-range designator: 'LF' parts operate down to 2.0 V while 'F' parts require 4.2 V minimum; substituting a 'F' into an 'LF' design can lock the MCU at low battery. Remember the 'T' suffix indicates Tape & Reel - a tray (-I/PT without T) will not feed pick-and-place.
合规信息
RoHS and REACH compliant per Microchip PIC18F8620 family datasheet DS39646K. Industrial temperature grade -40C to +85C. Not AEC-Q100 qualified; for automotive applications choose AEC-Q100-qualified PIC18F8620 automotive variants instead.