PIC18F6620-I/PT - 8-Bit MCU, 64KB Flash, 25MHz, TQFP-64 | Microchip
料号： PIC18F6620-I/PT ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $9.1 | $9.10 |
| 10 | $8.2 | $82.00 |
| 100 | $7.05 | $705.00 |
| 500 | $6.3 | $3,150.00 |
| 1,000 | $5.55 | $5,550.00 |
PIC18F6620-I/PT 概述
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, and a rich set of peripherals. The PIC18 family uses an enhanced 8-bit Harvard RISC architecture with a modified instruction set that is both C-compiler friendly and assembly-efficient. Within the broader semiconductor taxonomy, an MCU sits in the integrated-circuit hierarchy as: microcontroller -> embedded processor -> digital IC -> semiconductor device. PIC18F66xx devices specifically target high-pin-count industrial, instrumentation, and human-machine-interface designs.
Key features include five capture/compare/PWM modules, a 12-channel 10-bit analog-to-digital converter (ADC), two USART modules, an MSSP configurable as either SPI or I2C, two Addressable USARTs, and self-programming flash with In-Circuit Debug (ICD). The part runs from 2.0 V to 5.5 V, accepts an industrial temperature range of -40C to +85C, and supports both internal and external oscillator modes for flexible clocking.
Architecturally, the PIC18F6620 uses a 16-bit instruction word with an 8-bit data path, a hardware multiplier for fast math, a priority-level interrupt controller, and a 31-level hardware stack. Self-programming allows bootloader-based firmware updates in the field, while ICD support enables real-time debugging through two pins without consuming I/O.
Typical applications include industrial control panels, instrumentation, HVAC controllers, automotive body and climate electronics, USB-to-UART bridging via the USART peripherals, and white-goods user interfaces. The 12-bit ADC and generous I/O count make it ideal for sensor aggregation boards.
When designing with this part, ensure decoupling capacitors are placed within 5 mm of the VDD/VSS pairs, that the MCLR pin is pulled high through the recommended 10 kohm resistor, and that the in-circuit debugger is connected only during development. A common pitfall is leaving the LVD (low-voltage detect) disabled when designing for brown-out-sensitive applications.
This page synthesizes drop-in alternatives, application circuits, and design notes not available in the standalone Microchip datasheet, giving engineers a one-stop reference for selecting and applying the PIC18F6620-I/PT.
直接替换替代料： PIC18F6620-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： PIC18F6620-I/PT （相同外形与封装尺寸） ——差异在于 Package, Core Architecture, I/O Pins, Operating Temperature, EEPROM.
快速对比工具——选择替代料号进行并排对比：
PIC18F6720-I/PT
✅ 直接替换✓ 有现货
$21.1 / 个
查看数据手册 →PIC18F6628-I/PT
✅ 直接替换✓ 有现货
$5.2 / 个
查看数据手册 →PIC18F6680-I/PT
✅ 直接替换📋 参考替代料（不在目录中）
PIC18F65K90-I/PT
✅ 直接替换📋 参考替代料（不在目录中）
PIC18F65K80-I/PT
✅ 直接替换✓ 有现货
$3.62 / 个
查看数据手册 →PIC18F65K40-I/PT
✅ 直接替换✓ 有现货
$1.95 / 个
查看数据手册 →PIC18F6620-I/PT 最大额定值与电气特性
| Core Architecture | PIC18 enhanced 8-bit Harvard RISC |
| Program Flash | 64 KB (32K x 16) |
| SRAM | 3,840 bytes |
| EEPROM | 1,024 bytes |
| Maximum Clock Speed | 25 MHz (10 MIPS) |
| Supply Voltage (VDD) | 2.0 V to 5.5 V |
| Digital I/O Pins | 52 |
| ADC | 10-bit, 12 channels |
| CCP/PWM Modules | 5 |
| USART Modules | 2 (one enhanced) |
| MSSP | 1 (SPI or I2C configurable) |
| 工作温度范围 | -40C to +85C (industrial) |
| 封装 | TQFP-64 (PT) 10x10 mm |
| 安装类型 | Surface Mount |
| Self-Programming | Yes |
| In-Circuit Debug | Yes (ICD) |
| RoHS 状态 | Compliant |
PIC18F6620-I/PT 引脚配置
| 引脚 1 | MCLR — Master Clear (reset) input, internal pull-up enabled by configuration |
| 引脚 2 | RA0/AN0 — PORTA bit 0 / analog channel 0 |
| 引脚 3 | RA1/AN1 — PORTA bit 1 / analog channel 1 |
| 引脚 4 | RA2/AN2/VREF- — PORTA bit 2 / analog channel 2 / ADC negative reference |
| 引脚 5 | RA3/AN3/VREF+ — PORTA bit 3 / analog channel 3 / ADC positive reference |
| 引脚 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| 引脚 7 | RA5/AN4/SS — PORTA bit 5 / analog channel 4 / SPI slave select |
| 引脚 8 | RE0/RD — PORTE bit 0 / parallel port read control |
| 引脚 9 | RE1/WR — PORTE bit 1 / parallel port write control |
| 引脚 10 | RE2/CS — PORTE bit 2 / parallel port chip select |
| 引脚 11 | VDD — Positive supply voltage (2.0 V to 5.5 V) |
| 引脚 12 | VSS — Ground reference |
| 引脚 13 | OSC1/CLKI/RA7 — Crystal oscillator input / external clock input |
| 引脚 14 | OSC2/CLKO/RA6 — Crystal oscillator output / clock output |
| 引脚 15 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / clock input |
| 引脚 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 |
| 引脚 17 | RC2/CCP1 — PORTC bit 2 / CCP1 |
| 引脚 18 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| 引脚 19 | RD0/PSP0 — PORTD bit 0 / parallel slave port bit 0 |
| 引脚 20 | RD1/PSP1 — PORTD bit 1 / parallel slave port bit 1 |
| 引脚 21 | RD2/PSP2 — PORTD bit 2 / parallel slave port bit 2 |
| 引脚 22 | RD3/PSP3 — PORTD bit 3 / parallel slave port bit 3 |
| 引脚 23 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| 引脚 24 | RC5/SDO — PORTC bit 5 / SPI data out |
| 引脚 25 | RC6/TX1/CK1 — PORTC bit 6 / USART1 transmit / clock |
| 引脚 26 | RC7/RX1/DT1 — PORTC bit 7 / USART1 receive / data |
| 引脚 27 | RD4/PSP4 — PORTD bit 4 / parallel slave port bit 4 |
| 引脚 28 | RD5/PSP5 — PORTD bit 5 / parallel slave port bit 5 |
| 引脚 29 | RD6/PSP6/TX2/CK2 — PORTD bit 6 / parallel slave port / USART2 TX |
| 引脚 30 | RD7/PSP7/RX2/DT2 — PORTD bit 7 / parallel slave port / USART2 RX |
| 引脚 31 | VSS — Ground reference |
| 引脚 32 | VDD — Positive supply voltage |
| 引脚 33 | RB0/INT0/FLT0 — PORTB bit 0 / external interrupt 0 / PWM fault input |
| 引脚 34 | RB1/INT1 — PORTB bit 1 / external interrupt 1 |
| 引脚 35 | RB2/INT2 — PORTB bit 2 / external interrupt 2 |
| 引脚 36 | RB3/INT3/CCP2 — PORTB bit 3 / external interrupt 3 / CCP2 alternate |
| 引脚 37 | RB4/KBI0 — PORTB bit 4 / interrupt-on-change bit 0 |
| 引脚 38 | RB5/KBI1 — PORTB bit 5 / interrupt-on-change bit 1 |
| 引脚 39 | RB6/KBI2/PGC — PORTB bit 6 / interrupt-on-change / ICD clock |
| 引脚 40 | RB7/KBI3/PGD — PORTB bit 7 / interrupt-on-change / ICD data |
| 引脚 41 | VSS — Ground reference |
| 引脚 42 | VDD — Positive supply voltage |
| 引脚 43 | RF0/AN5 — PORTF bit 0 / analog channel 5 |
| 引脚 44 | RF1/AN6 — PORTF bit 1 / analog channel 6 |
| 引脚 45 | RF2/AN7 — PORTF bit 2 / analog channel 7 |
| 引脚 46 | RF3/AN8 — PORTF bit 3 / analog channel 8 |
| 引脚 47 | RF4/AN9 — PORTF bit 4 / analog channel 9 |
| 引脚 48 | RF5/AN10/CVREF — PORTF bit 5 / analog channel 10 / comparator voltage reference |
| 引脚 49 | RF6/AN11 — PORTF bit 6 / analog channel 11 |
| 引脚 50 | RF7 — PORTF bit 7 |
| 引脚 51 | RG0/ECCP3 — PORTG bit 0 / enhanced CCP3 |
| 引脚 52 | RG1/ECCP4 — PORTG bit 1 / enhanced CCP4 |
| 引脚 53 | RG2/ECCP5/C1OUT — PORTG bit 2 / enhanced CCP5 / comparator 1 output |
| 引脚 54 | RG3/CCP4/C2OUT — PORTG bit 3 / CCP4 alternate / comparator 2 output |
| 引脚 55 | RG4 — PORTG bit 4 |
| 引脚 56 | VSS — Ground reference |
| 引脚 57 | VDD — Positive supply voltage |
| 引脚 58 | RH0/A16 — PORTH bit 0 / external memory address 16 |
| 引脚 59 | RH1/A17 — PORTH bit 1 / external memory address 17 |
| 引脚 60 | RH2/A18 — PORTH bit 2 / external memory address 18 |
| 引脚 61 | RH3/A19 — PORTH bit 3 / external memory address 19 |
| 引脚 62 | RH4 — PORTH bit 4 |
| 引脚 63 | RH5 — PORTH bit 5 |
| 引脚 64 | RH6 — PORTH bit 6 |
典型应用
PIC18F6620-I/PT 适用于 6 应用s: Industrial Control Panel, HVAC Climate Controller, Automotive Body Electronics, Instrumentation and Data Acquisition, White Goods User Interface, Sensor Aggregation Hub.
Industrial Control Panel
The PIC18F6620-I/PT fits industrial control panel designs that need 52 I/O pins for keypad scanning, LED or LCD drive, and discrete output switching. With 64 KB flash and 3,840 bytes SRAM, it can run a C-compiled state machine that polls inputs, debounces switches, and updates a graphical display at 60 Hz. The 12-channel 10-bit ADC reads potentiometers and 4-20 mA loop sensors directly. The industrial -40C to +85C temperature range tolerates factory-floor environments, and the 2.0 V to 5.5 V supply lets the panel ride through brown-outs on noisy 24 V rails with a simple buck regulator.
推荐
HVAC Climate Controller
The PIC18F6620-I/PT is well matched to HVAC climate controllers that aggregate multiple temperature, humidity, and pressure sensors. The 12-channel ADC plus five CCP/PWM modules drive proportional damper and valve actuators directly without an external DAC. The 64 KB flash holds PID loop code and a graphical menu system. Operating from -40C to +85C, the part survives attic and rooftop unit environments. Two USARTs allow simultaneous connection to a room display board and a Modbus master, and self-programming flash supports remote firmware updates from a service tool.
推荐
Automotive Body Electronics
Body control modules for lighting, mirror, and seat position benefit from the PIC18F6620-I/PT's 52 I/O count and 5 PWM channels. The PIC drives multiple LED strings, MOSFET H-bridges for mirror adjustment, and stepper-motor drivers via PWM. The MSSP peripheral handles SPI communication with sensor ASICs, while the two USARTs link to a body-control network. Note that for under-hood AEC-Q100 qualified applications, choose the PIC18F6620-I/PT automotive-grade variant or migrate to PIC18F66K80-I/PT. The 2.0 V to 5.5 V supply is compatible with 12 V automotive rails through a regulator.
推荐
Instrumentation and Data Acquisition
Bench-top and rack-mount instruments use the PIC18F6620-I/PT to acquire analog signals through its 12-channel 10-bit ADC, condition them digitally, and stream results via UART or USB bridge. The 3,840-byte SRAM is sufficient for circular sample buffers of 4-8 ksps with chunked USB output, and 64 KB flash holds DSP-style filters and a menu system. The in-circuit debugger accelerates firmware bring-up, while self-programming enables calibration tables to be updated in the field. The 25 MHz core delivers 10 MIPS, more than adequate for per-sample polynomial linearization.
推荐
White Goods User Interface
Washing machines, ovens, and dishwashers rely on the PIC18F6620-I/PT to drive segmented LCDs, capacitive touch panels, and rotary encoders. The 52 I/O count supports direct keypad and LED matrix drive without external decoders, while five CCP/PWM channels control motor speed via TRIAC or FET drivers. The 64 KB flash stores multilingual UI strings and diagnostic logs, and self-programming allows service technicians to flash new firmware via a service-mode bootloader. The -40C to +85C industrial range covers the thermal envelope of consumer appliance cabinets.
推荐
Sensor Aggregation Hub
The PIC18F6620-I/PT serves as a low-cost sensor aggregation hub for industrial IoT nodes, reading 12 analog sensors via its built-in ADC and dozens of digital sensors via SPI or I2C on the MSSP. The 64 KB flash supports wireless protocol stacks (custom or simple proprietary) and 3,840 bytes SRAM holds short data buffers before Modbus or USART transmission. The two USARTs allow simultaneous connection to a local HMI and an upstream gateway. Operating at 25 MHz, the part can poll 50 sensors at 100 Hz while leaving margin for housekeeping.
推荐
推荐产品汇总
工程参考数据： PIC18F6620-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 | PIC18F6720-I/PT | PIC18F6628-I/PT | PIC18F6680-I/PT | PIC18F65K90-I/PT | PIC18F65K80-I/PT | PIC18F65K40-I/PT |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-64 (PT) 10x10 mm | TQFP-64 (PT) 10x10 mm - same | TQFP-64 (PT) 10x10 mm - same | TQFP-64 (PT) 10x10 mm - same | TQFP-64 (PT) 10x10 mm - same | TQFP-64 (PT) 10x10 mm - same | TQFP-64 (PT) 10x10 mm - same |
| Program Flash | 64 KB | 128 KB | 64 KB | 64 KB | 32 KB | 32 KB | 32 KB |
| SRAM | 3,840 bytes | 3,840 bytes | 3,936 bytes | 3,328 bytes | 2,048 bytes | 2,048 bytes | 2,048 bytes |
| EEPROM | 1,024 bytes | 1,024 bytes | 1,024 bytes | 1,024 bytes | 1,024 bytes | 1,024 bytes | 1,024 bytes |
| Maximum Clock | 25 MHz (10 MIPS) | 25 MHz (10 MIPS) | 25 MHz (10 MIPS) | 25 MHz (10 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) |
| Digital I/O | 52 | 52 | 54 | 52 | 53 | 53 | 58 |
| ADC | 10-bit, 12 channels | 10-bit, 12 channels | 10-bit, 12 channels | 10-bit, 12 channels | 12-bit, 16 channels | 12-bit, 12 channels | 12-bit, 36 channels |
| Special Feature | Self-programming + ICD | Self-programming + ICD | Self-programming + ICD + 2nd USART | Self-programming + ICD + CAN | Self-programming + ICD + 12-bit ADC | Self-programming + ICD + 12-bit ADC + CAN | Self-programming + ICD + CIP peripherals |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
关键差异点
- Same footprint, doubled flash memory for future growth （对比 PIC18F6720-I/PT)
- Industrial-grade same-footprint upgrade with newer peripherals （对比 PIC18F65K90-I/PT)
- CAN-enabled same-footprint option for networked industrial systems （对比 PIC18F6680-I/PT)
设计说明
Place a 100 nF decoupling capacitor within 5 mm of every VDD/VSS pair (the TQFP-64 has multiple VDD pins: 11, 32, 42, 57). Add a bulk 10 uF tantalum or ceramic capacitor at the board's main VDD entry. The PIC18F6620 has multiple VSS pins (12, 31, 41, 56); ensure all are connected to a low-impedance ground plane, not just one of them, to prevent ground bounce on high-current switching outputs. Avoid routing high-speed signals across the VDD/VSS split to prevent noise injection into the analog reference.
The TQFP-64 has 0.5 mm pitch and is best laid out on a 4-layer PCB with a continuous ground plane beneath the part. Use 0.15 mm trace/space rules for fanout and length-match differential SPI traces. If the board has external analog signals, dedicate one VDD/VSS pair (e.g., pin 11/12) to the analog AVDD/AVSS rail with a ferrite bead or LC filter from the digital VDD. The MCLR pin (pin 1) should pull up to VDD through a 10 kohm resistor and have a 100 nF cap to ground for decoupling; do not leave MCLR floating or the part will intermittently reset.
Three common pitfalls: (1) The MSSP peripheral can be SPI or I2C, but the same pins (RC3/SCK/SCL, RC4/SDI/SDA, RC5/SDO) are shared - configure the peripheral mode in firmware before driving these pins as GPIO or you will get unintended SPI/I2C activity. (2) Many PORTF analog pins (RF0-RF7) default to analog input at reset; if you want them as digital GPIO, set PCFG bits in ADCON1. (3) The CCP2 function is multiplexed between RC1 and RB3; configure the CCP2MX configuration bit correctly before designing the PCB, otherwise your PWM output will not appear on the pin you expect.
The PIC18F6620-I/PT typically dissipates less than 100 mW even at 25 MHz full I/O switching, well below thermal limits for the TQFP-64 package (junction-to-ambient typically around 50 C/W with a 4-layer PCB). However, when designing for sustained 5.5 V operation at industrial temperatures up to +85C, ensure ambient derating does not push junction temperature beyond +125C. In sealed enclosures with no airflow, consider lowering the clock or using sleep modes during idle periods to reduce self-heating.
合规信息
Industrial-grade (-I) part, not AEC-Q100 qualified. For automotive designs, use PIC18F6620-E/PT or PIC18F6620T-I/PT variants per Microchip automotive portfolio. RoHS and REACH compliance per Microchip product declaration.
