PIC18LF8620T-I/PT - 64KB Flash 8-bit MCU, 25MHz, 80-TQFP | Microchip
MPN: PIC18LF8620T-I/PT ✓ Hoạt độngPIC18LF8620T-I/PT Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho PIC18LF8620T-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 PIC18LF8620T-I/PT (cùng hình factor và footprint) — khác nhau ở Package, ADC, EEPROM, I/O Pins, Maximum CPU Speed.
PIC18LF8527T-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF8722T-I/PT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18LF8685T-I/PT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18LF8585T-I/PT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18LF8722-I/PT
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC18F8722T-I/PT
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC18LF8620T-I/PT Tỷ lệ tối đa & tính chất điện
| 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 |
| Hộp | 80-pin TQFP (12 x 12 mm) |
| Nhiệt độ hoạt động | -40C to +85C (Industrial) |
| Kiểu lắp đặt | Surface Mount |
| Packaging | Tape & Reel (T suffix) |
| Peripherals | USART, I2C, SPI, CCP, Parallel Slave Port |
| Trạng thái RoHS | Compliant |
| Lead-Free | Yes |
Cấu hình chân PIC18LF8620T-I/PT
| Chân 1 | MCLR — Master Clear (reset) input, active-low |
| Chân 2 | RA0 — PORTA bit 0 / analog AN0 |
| Chân 3 | RA1 — PORTA bit 1 / analog AN1 |
| Chân 4 | RA2 — PORTA bit 2 / analog AN2 |
| Chân 5 | RA3 — PORTA bit 3 / analog AN3 / VREF+ |
| Chân 6 | RA4 — PORTA bit 4 / analog AN4 |
| Chân 7 | RA5 — PORTA bit 5 / analog AN5 / VREF- |
| Chân 8 | RA6 — PORTA bit 6 / oscillator |
| Chân 9 | RA7 — PORTA bit 7 / oscillator |
| Chân 10 | VDD — Positive supply |
| Chân 11 | VSS — Ground |
| Chân 12 | RB0 — PORTB bit 0 / external interrupt |
| Chân 13 | RB1 — PORTB bit 1 |
| Chân 14 | RB2 — PORTB bit 2 |
| Chân 15 | RB3 — PORTB bit 3 |
| Chân 16 | RB4 — PORTB bit 4 |
| Chân 17 | RB5 — PORTB bit 5 / ICSP data |
| Chân 18 | RB6 — PORTB bit 6 / ICSP clock |
| Chân 19 | RB7 — PORTB bit 7 |
| Chân 20 | VDD — Positive supply |
| Chân 21 | VSS — Ground |
| Chân 22 | RC0 — PORTC bit 0 |
| Chân 23 | RC1 — PORTC bit 1 / CCP2 |
| Chân 24 | RC2 — PORTC bit 2 / CCP1 |
| Chân 25 | RC3 — PORTC bit 3 / SCL |
| Chân 26 | RC4 — PORTC bit 4 / SDA |
| Chân 27 | RC5 — PORTC bit 5 / SDO |
| Chân 28 | RC6 — PORTC bit 6 / TX |
| Chân 29 | RC7 — PORTC bit 7 / RX |
| Chân 30 | VDD — Positive supply |
| Chân 31 | VSS — Ground |
| Chân 32 | RD0 — PORTD bit 0 / PSP data |
| Chân 33 | RD1 — PORTD bit 1 / PSP data |
| Chân 34 | RD2 — PORTD bit 2 / PSP data |
| Chân 35 | RD3 — PORTD bit 3 / PSP data |
| Chân 36 | RD4 — PORTD bit 4 / PSP data |
| Chân 37 | RD5 — PORTD bit 5 / PSP data |
| Chân 38 | RD6 — PORTD bit 6 / PSP data |
| Chân 39 | RD7 — PORTD bit 7 / PSP data |
| Chân 40 | VSS — Ground |
| Chân 41 | RE0 — PORTE bit 0 / RD control |
| Chân 42 | RE1 — PORTE bit 1 / WR control |
| Chân 43 | RE2 — PORTE bit 2 / CS control |
| Chân 44 | RE3 — PORTE bit 3 |
| Chân 45 | RE4 — PORTE bit 4 |
| Chân 46 | RE5 — PORTE bit 5 |
| Chân 47 | RE6 — PORTE bit 6 |
| Chân 48 | RE7 — PORTE bit 7 |
| Chân 49 | VDD — Positive supply |
| Chân 50 | VSS — Ground |
| Chân 51 | RF0 — PORTF bit 0 |
| Chân 52 | RF1 — PORTF bit 1 / analog AN6 |
| Chân 53 | RF2 — PORTF bit 2 / analog AN7 |
| Chân 54 | RF3 — PORTF bit 3 / analog AN8 |
| Chân 55 | RF4 — PORTF bit 4 / analog AN9 |
| Chân 56 | RF5 — PORTF bit 5 / analog AN10 |
| Chân 57 | RF6 — PORTF bit 6 / analog AN11 |
| Chân 58 | RF7 — PORTF bit 7 |
| Chân 59 | VDD — Positive supply |
| Chân 60 | VSS — Ground |
| Chân 61 | RG0 — PORTG bit 0 |
| Chân 62 | RG1 — PORTG bit 1 |
| Chân 63 | RG2 — PORTG bit 2 |
| Chân 64 | RG3 — PORTG bit 3 |
| Chân 65 | RG4 — PORTG bit 4 |
| Chân 66 | RG5 — PORTG bit 5 |
| Chân 67 | RG6 — PORTG bit 6 |
| Chân 68 | RG7 — PORTG bit 7 |
| Chân 69 | AVDD — Analog positive supply |
| Chân 70 | AVSS — Analog ground |
| Chân 71 | NC — Not connected (per datasheet) |
| Chân 72 | NC — Not connected (per datasheet) |
| Chân 73 | OSC1 — Oscillator input |
| Chân 74 | OSC2 — Oscillator output |
| Chân 75 | VDD — Positive supply |
| Chân 76 | VSS — Ground |
| Chân 77 | NC — Not connected (per datasheet) |
| Chân 78 | NC — Not connected (per datasheet) |
| Chân 79 | NC — Not connected (per datasheet) |
| Chân 80 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
PIC18LF8620T-I/PT phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18LF8620T-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 | 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 |
Bảo phân biệt quan trọng
- Highest I/O count in PIC18 LF 80-TQFP family at the LF voltage tier (vsPIC18LF6520T-I/PT)
- LF voltage range supports 3.3 V and battery-backed designs (vsPIC18F8620T-I/PT)
- Cost-effective balance of Flash and RAM for non-USB applications (vsPIC18LF8722T-I/PT)
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.