PIC18LF4620-I/PT - 8-bit 40MHz 64KB Flash MCU | Microchip TQFP-44
MPN: PIC18LF4620-I/PT ✓ نشطPIC18LF4620-I/PT نظرة عامة
An 8-bit microcontroller (MCU) is a programmable processor that executes instructions 8 bits at a time and combines CPU, memory (Flash, RAM, EEPROM), peripherals (ADC, timers, UART, SPI, I2C, PWM), and I/O on a single silicon die. PIC18 microcontrollers occupy the high-performance tier of Microchip's 8-bit portfolio, sharing the PIC architecture lineage with PIC16 and PIC24/dsPIC families and targeting embedded control products where deterministic execution and low power matter more than raw MIPS. Within this hierarchy, PIC18LF4620 belongs to the F46xxx K-class subfamily that adds USB, CAN, and enhanced peripherals.
Key features include 64KB (32K x 16 words) self-programmable flash, 3968 bytes SRAM, 1024 bytes EEPROM, 13 ADC channels with 10-bit resolution, two comparators, two 8-bit timers and three 16-bit timers, two MSSP (SPI/I2C) and two EUSART ports, and nanoWatt technology that drops Iq below 100 nA in sleep mode. The 44-pin TQFP footprint and wide operating temperature range (-40C to +85C industrial grade) make it suitable for through-hole-replacement SMD designs.
The PIC18LF4620-I/PT uses an enhanced Harvard architecture with a 16-bit instruction word and 8-bit data path, allowing single-cycle 8x8 hardware multiply and single-cycle 16-bit fetch. The 40MHz internal clock drives 10 MIPS throughput, with 4x PLL options. nanoWatt dynamic clock switching lets the firmware trade MIPS for power at run-time. Master Clear, in-circuit serial programming (ICSP), and in-circuit debugger (ICD) interfaces are all retained on dedicated pins.
Typical applications include industrial sensor conditioning, USB HID peripherals, automotive body controllers, HVAC control panels, low-power remote sensing, and small appliances. With 36 I/O, the device can drive multiple keypads, LED matrices, or relays without external expanders.
When laying out, allocate the ICPG/ICPG clock pins away from PWM traces to avoid coupling, and place the 0.1uF Vdd decoupling within 5mm of each Vdd pin. An external 32.768 kHz crystal for Timer1 is recommended when real-time-clock accuracy matters.
This page aggregates DigiKey and Mouser distributor pricing, drop-in compatible replacements within the PIC18 family, application circuits and design notes that go beyond the manufacturer's datasheet alone.
بدائل مباشرة لـ PIC18LF4620-I/PT — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع PIC18LF4620-I/PT (نفس عامل الشكل والبصمة) — يختلف في Package, Timers, ADC, Operating Temperature, Core Architecture.
PIC18LF4520-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18F4620-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18LF4685-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18LF46K22-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18LF45K80-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18LF4580-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18LF4620-I/PT الحدود القصوى والخصائص الكهربائية
| Architecture | PIC18, 8-bit enhanced Harvard |
| CPU Core | PIC18 (8-bit data, 16-bit instruction) |
| Maximum CPU Clock | 40 MHz |
| Instruction Throughput | 10 MIPS |
| Program Memory (Flash) | 64 KB (32K x 16 words) |
| SRAM | 3968 bytes |
| EEPROM | 1024 bytes |
| Operating Voltage Range | 2.0 V to 5.5 V (LF variant) |
| I/O Pins | 36 |
| ADC | 10-bit, 13 channels |
| Timers | 2x 8-bit, 3x 16-bit |
| Communication | 2x MSSP (SPI/I2C), 2x EUSART, USB 2.0 FS |
| العلبة | 44-pin TQFP (PT), 10x10 mm |
| نوع التركيب | Surface Mount |
| درجة حرارة التشغيل | -40 C to +85 C (Industrial, I grade) |
| Power-Saving Modes | nanoWatt (sleep, idle, RC_RUN, RC_IDLE) |
| Programming/Debug | ICSP, ICD, in-circuit |
| حالة RoHS | Compliant |
تكوين أطراف PIC18LF4620-I/PT
| دبوس 1 | MCLR — Master Clear (Reset, active-low) |
| دبوس 2 | RA0/AN0 — Port A bit 0 / Analog input 0 |
| دبوس 3 | RA1/AN1 — Port A bit 1 / Analog input 1 |
| دبوس 4 | RA2/AN2/Vref- — Port A bit 2 / Analog input 2 / ADC Vref- |
| دبوس 5 | RA3/AN3/Vref+ — Port A bit 3 / Analog input 3 / ADC Vref+ |
| دبوس 6 | RA4/T0CKI — Port A bit 4 / Timer0 clock input |
| دبوس 7 | RA5/AN4/SS — Port A bit 5 / Analog input 4 / SPI slave select |
| دبوس 8 | RE0/RD — Port E bit 0 / Parallel-port read strobe |
| دبوس 9 | RE1/WR — Port E bit 1 / Parallel-port write strobe |
| دبوس 10 | RE2/CS — Port E bit 2 / Parallel-port chip select |
| دبوس 11 | VDD — Positive supply |
| دبوس 12 | VSS — Ground |
| دبوس 13 | OSC1/CLKI/RA7 — Oscillator input / external clock / Port A bit 7 |
| دبوس 14 | OSC2/CLKO/RA6 — Oscillator output / clock out / Port A bit 6 |
| دبوس 15 | RC0/T1OSO/T13CKI — Port C bit 0 / Timer1 oscillator output / T1 clock |
| دبوس 16 | RC1/T1OSI/CCP2 — Port C bit 1 / Timer1 oscillator input / CCP2 |
| دبوس 17 | RC2/CCP1 — Port C bit 2 / Capture-Compare-PWM 1 |
| دبوس 18 | RC3/SCK/SCL — Port C bit 3 / SPI clock / I2C clock |
| دبوس 19 | RC4/SDI/SDA — Port C bit 4 / SPI data in / I2C data |
| دبوس 20 | RC5/SDO — Port C bit 5 / SPI data out |
| دبوس 21 | RC6/TX/CK — Port C bit 6 / EUSART transmit / clock |
| دبوس 22 | RC7/RX/DT — Port C bit 7 / EUSART receive / data |
| دبوس 23 | RD0/PSP0 — Port D bit 0 / Parallel Slave Port data 0 |
| دبوس 24 | RD1/PSP1 — Port D bit 1 / Parallel Slave Port data 1 |
| دبوس 25 | RD2/PSP2 — Port D bit 2 / Parallel Slave Port data 2 |
| دبوس 26 | RD3/PSP3 — Port D bit 3 / Parallel Slave Port data 3 |
| دبوس 27 | RD4/PSP4 — Port D bit 4 / Parallel Slave Port data 4 |
| دبوس 28 | RD5/PSP5 — Port D bit 5 / Parallel Slave Port data 5 |
| دبوس 29 | RD6/PSP6 — Port D bit 6 / Parallel Slave Port data 6 |
| دبوس 30 | RD7/PSP7 — Port D bit 7 / Parallel Slave Port data 7 |
| دبوس 31 | VSS — Ground |
| دبوس 32 | VDD — Positive supply |
| دبوس 33 | RB0/INT0/FLT0 — Port B bit 0 / External interrupt 0 / PWM fault |
| دبوس 34 | RB1/INT1 — Port B bit 1 / External interrupt 1 |
| دبوس 35 | RB2/INT2 — Port B bit 2 / External interrupt 2 |
| دبوس 36 | RB3/CCP2 — Port B bit 3 / CCP2 alt |
| دبوس 37 | RB4 — Port B bit 4 (interrupt-on-change) |
| دبوس 38 | RB5 — Port B bit 5 (interrupt-on-change) |
| دبوس 39 | RB6/PGC — Port B bit 6 / ICSP clock (ICD) |
| دبوس 40 | RB7/PGD — Port B bit 7 / ICSP data (ICD) |
| دبوس 41 | RE3 — Port E bit 3 (digital only) |
| دبوس 42 | RC7 — Port C bit 7 (alt function pin) |
| دبوس 43 | RC6 — Port C bit 6 (alt function pin) |
| دبوس 44 | RC5 — Port C bit 5 (alt function pin) |
التطبيقات النموذجية
PIC18LF4620-I/PT مناسب لـ 7 التطبيقs: USB HID / CDC Peripheral, Industrial Sensor Conditioning, Automotive Body Controllers, HVAC Control Panels, Low-Power Remote Sensing, Small Appliance Controllers, Educational / Hobby Development.
USB HID / CDC Peripheral
The PIC18LF4620 integrates a USB 2.0 full-speed device controller with on-chip transceiver, 1.5 kohm pull-up on D+, and dedicated interrupt vector. With 64KB flash it accommodates Microchip's USB stack (HID, CDC, MSD, composite) plus custom vendor-class firmware without external boot ROM. The 40MHz / 10 MIPS throughput handles 12 Mbps enumeration and full HID polling at 1 kHz with substantial CPU headroom. Compared to external USB serial chips (FTDI, MCP2200), the on-chip solution saves PCB area and BOM cost. Industrial users run CDC at 5V; medical or portable designs run at 3.3V using the LF variant. The same die also enables keyboard, mouse, gamepad, and custom HID products.
موصى به
Industrial Sensor Conditioning
The PIC18LF4620's 13-channel 10-bit ADC and nanoWatt sleep modes make it well-suited for multi-sensor industrial front-ends. With 36 I/O it can read 4-20 mA loop sensors, PT100 RTDs via op-amp front end, and digital humidity sensors through the MSSP SPI channel simultaneously. The 1024-byte EEPROM stores calibration constants, while 64KB flash accommodates complex linearization math. Designers leverage the LF variant's 2.0V minimum to run from a single Li-ion cell with sub-uA sleep currents for battery-backup sensors. Industrial grade (-40C to +85C) supports outdoor and factory-floor deployments. The EUSART ports enable Modbus RTU masters or slaves in PLC-like control blocks.
موصى به
Automotive Body Controllers
Although not AEC-Q100 qualified by Microchip product declaration, the PIC18LF4620 powers many body-control subsystems (interior lighting, seat controllers, mirror adjusters) where extended temperature and EMC robustness matter. The 36 I/O drives multiplexed LED arrays, motor bridges via PWM, and LIN slaves through the EUSART. The 2.0-5.5V operating range supports direct 5V or 3.3V regulation from the vehicle battery. The device supports automotive diagnostics via CCP/ECCP for capturing PWM edge timing on fuel injectors and crank sensors. For AEC-Q100-qualified variants, Microchip offers PIC18F46K22-I/PT or PIC18F46J11-I/PT as higher-temperature automotive alternatives.
موصى به
HVAC Control Panels
The PIC18LF4620-I/PT's 36 I/O drive keypads, seven-segment displays, character LCDs, and triac-controlled line-voltage loads through optoisolators in HVAC thermostats and zone controllers. The MSSP/SPI interface connects to a non-volatile FRAM for black-box fault logging; the EUSARTs handle Modbus links to indoor air-quality sensors. nanoWatt idle reduces standby power below 50 uA in compliance with energy-star thermostats. With 64KB flash, designers add PID control loops, scheduling firmware, and ZigBee or Wi-Fi module hosts. The 2.0V minimum enables backup super-capacitor ride-through during brownouts. Industrial temperature rating covers basement-boiler installations.
موصى به
Low-Power Remote Sensing
The PIC18LF4620's nanoWatt technology and 2.0V minimum make it well-suited for battery-powered remote sensors. Sleep currents below 100 nA allow multi-year operation on a single CR2032 cell when waking periodically via Watchdog Timer or external interrupt. The LF variant's 5.5V maximum protects against accidental overvoltage from unregulated solar or inductive sources. With 64KB flash the MCU hosts over-the-air bootloader protocols and 1024-byte EEPROM stores calibration and identification data. The 10-bit ADC with internal 1.2V reference provides ratiometric measurements without external references, lowering BOM. Suitable for wildlife trackers, smart agriculture nodes, and remote telemetry units.
موصى به
Small Appliance Controllers
The PIC18LF4620-I/PT provides the control brain for small kitchen and household appliances such as coffee makers, blenders, induction cookers, and washing machines. The 36 I/O drive relays, TRIAC optocouplers, LED status indicators, and 7-segment displays. Hardware CCP/ECCP generates accurate zero-cross PWM for phase-angle dimming and TRIAC firing. With 64KB flash the firmware supports multilingual UI, recipe management, and BLE control via an external module. The 2.0V-5.5V range covers 3.3V and 5V designs from rectified-mains or USB-power input. Industrial -40C to +85C covers under-counter and garage installations.
موصى به
Educational / Hobby Development
The PIC18LF4620-I/PT is a popular choice for student projects, hobby robotics, and OEM educational kits because it is supported by Microchip's free MPLAB X IDE, XC8 compiler, and the MPLAB PICkit 5 in-circuit debugger. With 64KB flash and 36 I/O, students can tackle UART/SPI/I2C, ADC, PWM, and USB projects on a single chip. The TQFP-44 package is breadboard-friendly with breakout boards, and the 2.0V-5.5V range tolerates bench power supplies and battery packs. The vast PIC18 ecosystem includes reference designs, app notes (AN851, AN947, AN992), and active community forums for debugging and learning. Industrial temperature grade handles laboratory and maker-space conditions.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ PIC18LF4620-I/PT — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | PIC18LF4520-I/PT | PIC18F4620-I/PT | PIC18LF4685-I/PT | PIC18LF46K22-I/PT | PIC18LF45K80-I/PT |
|---|---|---|---|---|---|---|
| Package | TQFP-44 (PT) 10x10 mm | TQFP-44 (PT) 10x10 mm - same | TQFP-44 (PT) 10x10 mm - same | TQFP-44 (PT) 10x10 mm - same | TQFP-44 (PT) 10x10 mm - same | TQFP-44 (PT) 10x10 mm - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Flash | 64 KB | 32 KB (-50%) | 64 KB (same) | 96 KB (+50%) | 64 KB (same) | 32 KB (-50%) |
| SRAM | 3968 bytes | 1536 bytes (-61%) | 3968 bytes (same) | 3328 bytes (-16%) | 3896 bytes (-2%) | 2048 bytes (-48%) |
| Operating Voltage | 2.0V to 5.5V (LF) | 2.0V to 5.5V (LF) | 4.2V to 5.5V (F) | 2.0V to 5.5V (LF) | 1.8V to 5.5V (K-series) | 1.8V to 5.5V (K-series) |
| USB 2.0 FS | Yes (HW) | Yes (HW) | Yes (HW) | Yes (HW) | No | No |
| CAN 2.0B | No | No | No | No | No | Yes (HW) |
| Maximum Frequency | 40 MHz / 10 MIPS | 40 MHz / 10 MIPS | 40 MHz / 10 MIPS | 40 MHz / 10 MIPS | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS |
أبرز الفروقات
- Drop-in flash upgrade without PCB change (مقابلPIC18LF4520-I/PT)
- Higher maximum throughput than F46xx predecessors (مقابلPIC18LF45K80-I/PT)
- USB hardware integrated (مقابلPIC18LF4580-I/PT)
ملاحظات التصميم
Place a 0.1uF ceramic decoupling capacitor within 5mm of each Vdd pin (pins 11 and 32 on TQFP-44); add a bulk 10uF tantalum or aluminum polymer capacitor adjacent to the MCU. The LF variant's 2.0V minimum requires that Vdd ramp cleanly without ringing; for battery applications use an MCP1700 LDO with 1uA Iq, and consider an MCP1640 boost if running from a single 1.5V cell. nanoWatt sleep currents below 100 nA are only achieved when all I/O are configured as outputs and the WDT is disabled.
Route the USB D+/D- traces as a 90-ohm differential pair on the top layer with continuous ground plane beneath, matching Microchip AN612 reference design. Keep OSC1/OSC2 traces short and surrounded by ground pour to avoid coupling into the USB or analog inputs. The ICSP/ICD pins (RB6/PGC, RB7/PGD) must remain accessible for programming even in production boards - either expose test pads or include a 2x3 0.1 inch header footprint.
Do not connect the MCLR pin directly to Vdd - always use a 10 kohm pull-up and 100 nF cap to ground for proper power-on reset. Ensure CONFIG bits are programmed (use MPLAB X default template) to enable brown-out reset (BOR) and watchdog timer (WDT). For USB designs, the internal 48 MHz PLL must be enabled in CONFIG1L and the USB regulator (3.3V internal) requires a 220 nF capacitor on Vusb. Analog pins configured as digital I/O will draw parasitic current unless explicitly switched to digital mode in ADCON1.
معلومات الامتثال
RoHS and lead-free per Microchip product declaration. AEC-Q100 qualification is not declared for this part; for automotive applications, Microchip recommends PIC18F46K22-I/PT or PIC18F46J11-I/PT automotive-grade variants.