PIC18F8620-E/PT - 8-bit 25MHz 64KB Flash MCU | Microchip | 80-TQFP
MPN： PIC18F8620-E/PT ✓ 啟用中PIC18F8620-E/PT 概覽
What is a PIC18 Microcontroller? PIC18F microcontrollers are 8-bit CMOS flash-based MCUs from Microchip built on an enhanced RISC Harvard architecture. They sit in the hierarchy: microcontroller -> embedded controller -> 8-bit MCU -> PIC18 family -> PIC18F sub-family -> flash-programmable MCU. PIC18F parts are positioned between baseline PIC10/12/16 and 16-bit dsPIC/PIC24 devices, optimized for C-compiler-friendly development with linear memory maps, hardware multiply, and self-programming support.
Key features include 16 channels of 10-bit Analog-to-Digital conversion, two analog comparators, five capture/compare/PWM modules, two MSSP ports configurable as SPI or I2C, an additional timer, external memory bus addressing up to 2 MB, self-programming flash, ICD (In-Circuit Debug), and 68 digital I/O pins. Operating voltage spans 4.2 V to 5.5 V with the extended -40C to +125C temperature grade.
The PIC18F8620 uses an enhanced Harvard architecture with separate program and data buses, a 16-bit instruction word, hardware 8x8 multiplier, and a 32-level hardware stack. Self-programming allows field firmware upgrades via bootloader code, while the ICD interface permits in-circuit debug with breakpoints and watchpoints. The 80-TQFP package exposes extensive I/O and peripheral pin functions for high-pin-count embedded designs.
Typical applications include industrial automation controllers, HVAC and building control, automotive body and instrument cluster electronics (extended temp), consumer appliance interfaces, security and alarm panels, and USB/HID-class embedded peripherals using the MSSP ports.
When designing with this part, ensure decoupling on VDD/VSS pairs and follow Microchip AN869 application note guidelines for analog and digital supply layout. The 'E' suffix denotes the extended -40C to +125C operating range, suitable for harsh industrial and automotive under-hood environments.
This page synthesizes distributor pricing, drop-in same-package alternatives from the same PIC18F family, and practical design notes not found in the manufacturer datasheet alone.
直接替換替代品，適用於 PIC18F8620-E/PT — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： PIC18F8620-E/PT （相同外形與佔位） — 差異在於 Package, Timers, ADC, Core Architecture, Operating Temperature.
PIC18F8720-E/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC18F8520-I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC18F8585-E/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC18F85K22-E/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC18F85K90-E/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC18F8620-E/PT 最大額定值與電氣特性
| Family | PIC18F |
| Core | 8-bit PIC RISC (Harvard) |
| Maximum CPU Speed | 25 MHz (10 MIPS) |
| Program Memory | 64 KB (32K x 16) Enhanced Flash |
| RAM | 3840 bytes |
| EEPROM | 1024 bytes |
| I/O Pins | 68 |
| ADC | 10-bit, 16 channels |
| Comparators | 2 |
| CCP/PWM Modules | 5 |
| MSSP (SPI/I2C) Ports | 2 |
| Timers | 5 (TMR0-TMR4) |
| Operating Voltage | 4.2 V to 5.5 V |
| 工作溫度 | -40C to +125C (Extended, 'E' suffix) |
| 封裝 | 80-pin TQFP (12x12 mm) |
| 安裝類型 | Surface Mount |
| Self-Programming | Yes |
| In-Circuit Debug (ICD) | Yes |
| External Memory Bus | Yes (up to 2 MB) |
| Hardware Multiplier | 8 x 8 |
| Instruction Set | PIC18 enhanced (16-bit instructions, 75 instructions) |
| RoHS 狀態 | Compliant |
PIC18F8620-E/PT 腳位配置
| 腳位 1 | MCLR — Master Clear (Reset) input, programming voltage input |
| 腳位 2 | RA0/AN0 — Port A bit 0 / Analog input 0 |
| 腳位 3 | RA1/AN1 — Port A bit 1 / Analog input 1 |
| 腳位 4 | RA2/AN2/VREF- — Port A bit 2 / Analog input 2 / ADC VREF- |
| 腳位 5 | RA3/AN3/VREF+ — Port A bit 3 / Analog input 3 / ADC VREF+ |
| 腳位 6 | RA4/T0CKI — Port A bit 4 / Timer0 clock input |
| 腳位 7 | RA5/AN4/SS1 — Port A bit 5 / Analog input 4 / MSSP1 slave select |
| 腳位 8 | RE0/RD/AN5 — Port E bit 0 / Read signal for external memory / Analog input 5 |
| 腳位 9 | RE1/WR/AN6 — Port E bit 1 / Write signal for external memory / Analog input 6 |
| 腳位 10 | RE2/CS/AN7 — Port E bit 2 / Chip select for external memory / Analog input 7 |
| 腳位 11 | VDD — Positive supply voltage (4.2V to 5.5V) |
| 腳位 12 | VSS — Ground reference |
| 腳位 13 | OSC1/CLKI/RA7 — Crystal oscillator input / External clock input / Port A bit 7 |
| 腳位 14 | OSC2/CLKO/RA6 — Crystal oscillator output / Clock output / Port A bit 6 |
| 腳位 15 | RC0/T1OSO/T1CKI — Port C bit 0 / Timer1 oscillator output / Timer1 clock input |
| 腳位 16 | RC1/T1OSI/CCP2 — Port C bit 1 / Timer1 oscillator input / CCP2 output |
| 腳位 17 | RC2/CCP1 — Port C bit 2 / CCP1 output |
| 腳位 18 | RC3/SCK1/SCL1 — Port C bit 3 / MSSP1 SPI clock / I2C clock |
| 腳位 19 | RD0/PSP0 — Port D bit 0 / Parallel Slave Port bit 0 |
| 腳位 20 | RD1/PSP1 — Port D bit 1 / Parallel Slave Port bit 1 |
| 腳位 21 | RD2/PSP2 — Port D bit 2 / Parallel Slave Port bit 2 |
| 腳位 22 | RD3/PSP3 — Port D bit 3 / Parallel Slave Port bit 3 |
| 腳位 23 | RC4/SDI1/SDA1 — Port C bit 4 / MSSP1 SPI data in / I2C data |
| 腳位 24 | RC5/SDO1 — Port C bit 5 / MSSP1 SPI data out |
| 腳位 25 | RC6/TX1/CK1 — Port C bit 6 / EUSART1 transmit / clock |
| 腳位 26 | RC7/RX1/DT1 — Port C bit 7 / EUSART1 receive / data |
| 腳位 27 | RD4/PSP4 — Port D bit 4 / Parallel Slave Port bit 4 |
| 腳位 28 | RD5/PSP5 — Port D bit 5 / Parallel Slave Port bit 5 |
| 腳位 29 | RD6/PSP6/TX2 — Port D bit 6 / Parallel Slave Port bit 6 / EUSART2 transmit |
| 腳位 30 | RD7/PSP7/RX2 — Port D bit 7 / Parallel Slave Port bit 7 / EUSART2 receive |
| 腳位 31 | VSS — Ground reference |
| 腳位 32 | VDD — Positive supply voltage (4.2V to 5.5V) |
| 腳位 33 | RB0/INT0/FLT0 — Port B bit 0 / External interrupt 0 / PWM fault input |
| 腳位 34 | RB1/INT1 — Port B bit 1 / External interrupt 1 |
| 腳位 35 | RB2/INT2 — Port B bit 2 / External interrupt 2 |
| 腳位 36 | RB3/INT3/CCP2A — Port B bit 3 / External interrupt 3 / CCP2 alternate |
| 腳位 37 | RB4/KBI0 — Port B bit 4 / Interrupt-on-change bit 0 |
| 腳位 38 | RB5/KBI1 — Port B bit 5 / Interrupt-on-change bit 1 |
| 腳位 39 | RB6/KBI2/PGC — Port B bit 6 / Interrupt-on-change bit 2 / ICSP clock |
| 腳位 40 | RB7/KBI3/PGD — Port B bit 7 / Interrupt-on-change bit 3 / ICSP data |
| 腳位 41 | RF0 — Port F bit 0 |
| 腳位 42 | RF1 — Port F bit 1 |
| 腳位 43 | RF2 — Port F bit 2 |
| 腳位 44 | RF3 — Port F bit 3 |
| 腳位 45 | RF4 — Port F bit 4 |
| 腳位 46 | RF5 — Port F bit 5 |
| 腳位 47 | RF6 — Port F bit 6 |
| 腳位 48 | RF7 — Port F bit 7 |
| 腳位 49 | RG0 — Port G bit 0 |
| 腳位 50 | RG1 — Port G bit 1 |
| 腳位 51 | RG2 — Port G bit 2 |
| 腳位 52 | RG3 — Port G bit 3 |
| 腳位 53 | RG4 — Port G bit 4 |
| 腳位 54 | RG5 — Port G bit 5 |
| 腳位 55 | AVDD — Analog positive supply voltage |
| 腳位 56 | AVSS — Analog ground reference |
| 腳位 57 | RA0/AN0 — Port A bit 0 / Analog input 0 (secondary pin) |
| 腳位 58 | RA1/AN1 — Port A bit 1 / Analog input 1 (secondary pin) |
| 腳位 59 | RA2/AN2/VREF- — Port A bit 2 / Analog input 2 / ADC VREF- |
| 腳位 60 | RA3/AN3/VREF+ — Port A bit 3 / Analog input 3 / ADC VREF+ |
| 腳位 61 | RA5/AN4/SS1 — Port A bit 5 / Analog input 4 / MSSP1 slave select |
| 腳位 62 | RE3 — Port E bit 3 |
| 腳位 63 | RH0 — Port H bit 0 |
| 腳位 64 | RH1 — Port H bit 1 |
| 腳位 65 | RH2 — Port H bit 2 |
| 腳位 66 | RH3 — Port H bit 3 |
| 腳位 67 | RH4 — Port H bit 4 |
| 腳位 68 | RH5 — Port H bit 5 |
| 腳位 69 | RH6 — Port H bit 6 |
| 腳位 70 | RH7 — Port H bit 7 |
| 腳位 71 | RJ0 — Port J bit 0 |
| 腳位 72 | RJ1 — Port J bit 1 |
| 腳位 73 | RJ2 — Port J bit 2 |
| 腳位 74 | RJ3 — Port J bit 3 |
| 腳位 75 | RJ4 — Port J bit 4 |
| 腳位 76 | RJ5 — Port J bit 5 |
| 腳位 77 | RJ6 — Port J bit 6 |
| 腳位 78 | RJ7 — Port J bit 7 |
| 腳位 79 | VDD — Positive supply voltage (4.2V to 5.5V) |
| 腳位 80 | VSS — Ground reference |
典型應用
PIC18F8620-E/PT 適用於 7 應用s: Industrial Automation Controller, HVAC and Building Control System, Automotive Body Electronics, Security and Alarm Panel Controller, Consumer Appliance Control Board, Point-of-Sale Terminal and Kiosk Controller, USB HID / Human Interface Device.
Industrial Automation Controller
The PIC18F8620-E/PT fits industrial PLC and machine controller applications due to its 16-channel 10-bit ADC for sensor acquisition, 5 CCP/PWM modules for motor and actuator control, 2 MSSP ports for SPI/I2C sensor networks, and 68 I/O pins for switch and relay interfacing. Its -40C to +125C extended temperature range supports harsh factory-floor environments. The 64 KB flash and 3840 bytes RAM allow Modbus RTU or CANopen-style stack integration, while self-programming enables field firmware updates. Compared to discrete logic controllers, this single-chip solution reduces BOM and PCB area in motor control and process automation systems.
推薦
HVAC and Building Control System
The PIC18F8620-E/PT is well suited for HVAC control panels, thermostats, and building automation controllers that must aggregate inputs from temperature, airflow, and occupancy sensors. Its 16 ADC channels handle multiple analog sensor inputs simultaneously, while the 5 PWM channels drive fan speed, damper motors, and valve actuators. The 80-pin TQFP package supports displays, keypads, and communication interfaces (MSSP for SPI displays, UART for Modbus). Extended -40C to +125C temperature grade permits rooftop and plant-room deployment. Self-programming flash allows remote firmware updates for energy management algorithm improvements over the equipment lifecycle.
推薦
Automotive Body Electronics
The PIC18F8620-E/PT with extended -40C to +125C temperature grade targets automotive body control modules, instrument clusters, and central body computers. Its 68 I/O pins drive window lifters, mirror adjusters, lighting relays, and door lock actuators via PWM control. The 16-channel ADC reads multiple analog sensors (battery voltage, temperature, fluid levels), and the 2 MSSP ports connect to SPI-controlled LED drivers or I2C ambient light sensors. For full AEC-Q100 automotive qualification, designers should verify status with Microchip's automotive selector, but the 'E' temp grade is widely used in non-safety body electronics.
推薦
Security and Alarm Panel Controller
The PIC18F8620-E/PT serves as the main controller in commercial security and fire alarm panels, where it monitors dozens of sensor loops via its 16 ADC channels and 68 I/O pins. The EEPROM (1024 bytes) stores user codes, zone configurations, and event logs with non-volatile retention. Two MSSP ports connect to peripheral keypads, RFID readers, and GSM/Ethernet modules via SPI or I2C. Self-programming allows remote firmware upgrades for new sensor protocols and cybersecurity patches. Extended temperature operation supports unheated warehouses and outdoor equipment enclosures.
推薦
Consumer Appliance Control Board
The PIC18F8620-E/PT integrates washing machine, dishwasher, and oven controller functionality with its combination of 16 ADC channels (for temperature, water level, motor current sensing), 5 PWM outputs (for motor drive, valve control, buzzer), and 2 serial ports (for display panel and wireless module). The 64 KB flash holds sophisticated wash-cycle algorithms, error diagnostic logic, and user interface state machines. Its TQFP-80 package fits compact appliance control boards, and the extended temperature grade supports under-counter and garage installations where ambient temperatures vary widely.
推薦
Point-of-Sale Terminal and Kiosk Controller
The PIC18F8620-E/PT serves as the main processor in POS terminals, vending machines, and self-service kiosks where reliability and code maturity are critical. Its 64 KB flash stores payment flow state machines, and the 3840-byte RAM handles transaction buffers. Two MSSP ports connect to NFC readers and SPI displays, while the 5 PWM channels drive receipt printer stepper motors and audio feedback. Extended temperature range supports outdoor kiosks and refrigerated vending. Self-programming enables secure firmware updates for new payment standards and regulatory compliance.
推薦
USB HID / Human Interface Device
The PIC18F8620-E/PT implements USB Human Interface Devices such as custom keyboards, industrial input panels, and barcode scanners by interfacing an external USB transceiver to the MSSP ports and using software USB on general I/O. The 64 KB flash and 3840-byte RAM comfortably hold USB HID class drivers, HID report descriptors, and user firmware. The 68 I/O pins support matrix-scanned keypads up to 8x8 plus indicator LEDs. Extended temperature grade and self-programming support field firmware updates for new HID usage pages without hardware recall.
推薦
推薦產品摘要
工程參考資料，適用於 PIC18F8620-E/PT — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | PIC18F8720-E/PT | PIC18F8520-I/PT | PIC18F8585-E/PT | PIC18F85K22-E/PT | PIC18F85K90-E/PT |
|---|---|---|---|---|---|---|
| Package | 80-pin TQFP (12x12 mm) | 80-pin TQFP - same | 80-pin TQFP - same | 80-pin TQFP - same | 80-pin TQFP - same | 80-pin TQFP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Flash | 64 KB (32K x 16) | 128 KB | 32 KB | 48 KB | 32 KB | 32 KB |
| RAM | 3840 bytes | 3936 bytes | 2304 bytes | 3328 bytes | 2048 bytes | 2048 bytes |
| EEPROM | 1024 bytes | 1024 bytes | 1024 bytes | 1024 bytes | 1024 bytes | 1024 bytes |
| Max CPU Speed | 25 MHz (10 MIPS) | 25 MHz | 40 MHz | 40 MHz | 64 MHz | 64 MHz |
| Operating Voltage | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 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 |
| I/O Pins | 68 | 68 | 68 | 68 | 68 | 68 |
| ADC Channels | 16 x 10-bit | 16 x 10-bit | 16 x 10-bit | 12 x 12-bit | 24 x 10-bit | 24 x 12-bit |
| Operating Temperature | -40C to +125C (E grade) | -40C to +125C | -40C to +85C (I grade) | -40C to +125C | -40C to +125C | -40C to +125C |
主要差異化特點
- Most flash memory in 80-TQFP PIC18F85xx family tier (對比PIC18F8520-I/PT)
- Wider operating voltage and proven design maturity (對比PIC18F85K22-E/PT)
- Higher CPU throughput vs older legacy 25 MHz F-series (對比PIC18F8585-E/PT)
設計說明
The PIC18F8620-E/PT requires a single 5V supply on VDD (4.2V to 5.5V range) and separate AVDD/AVSS for the ADC reference. Place 100 nF decoupling capacitors on each VDD/VSS pair as close to the pins as possible, plus a bulk 10 uF tantalum near the device. A ferrite bead plus 10 ohm resistor between VDD and AVDD reduces digital switching noise coupling into the ADC. An external low-dropout regulator (e.g., MCP1700) is recommended if the supply rail is shared with motors or relays.
Layout the 80-TQFP package with a continuous ground plane on the top or bottom layer directly under the device to provide thermal dissipation and a low-impedance return path. Keep analog and digital signal traces separated where possible, and route the analog inputs (AN0-AN15) away from switching signals such as PWM outputs. The TQFP exposed pad is not present on this package; thermal performance relies on copper pour connected to VSS pins. Recommended footprint is per Microchip package specification TB-008.
Two critical pitfalls to avoid: (1) Forgetting the MCLR pull-up resistor (typically 10 kohm to VDD) - if left floating, the device can randomly reset or fail to start. (2) Configuring the PGC/PGD pins (RB6/RB7) as outputs in firmware before disabling ICD - this prevents in-circuit debugging and may require high-voltage programming to recover. Additionally, the ADC's acquisition time must be set correctly per the source impedance of the analog input; failing to do so causes significant ADC conversion errors.
When using the external memory bus (RE0/RE1/RE2 as RD/WR/CS plus the parallel slave port on PORTD), add 33 ohm series damping resistors near the microcontroller to limit overshoot and ringing on the bus. Match trace lengths for the address and data bus within 1 cm to avoid setup/hold violations at high bus speeds. If the external memory is not used, leave RE0-RE2 as standard digital I/O by clearing the EBDIS fuse.
合規資訊
RoHS compliant per Microchip product page. 'E' temperature suffix indicates extended -40C to +125C operation. AEC-Q100 automotive qualification status is NOT explicitly stated for this part - confirm with Microchip automotive selector for safety-critical designs.