PIC18LF4620-I/P - 8-bit 40MHz MCU 64KB Flash 40-PDIP | Microchip
MPN: PIC18LF4620-I/P ✓ פעילPIC18LF4620-I/P סקירה
A microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, working RAM, peripheral I/O, and clock generation on one die. The PIC18 family sits in the broader taxonomy: microcontroller -> embedded processor -> semiconductor -> integrated circuit. Within 8-bit MCUs, PIC18 devices are typically classified by their high-endurance Enhanced Flash memory, hardware multiplier, and C-friendly architecture. The LF suffix denotes the low-voltage variant that supports operation down to 2.0V, enabling battery-powered and 3.3V designs.
Key features include 64KB (32K x 16) of self-programmable Flash, 3968 bytes of SRAM, 1024 bytes of EEPROM data memory, 36 I/O pins with individual direction control, 13 channels of 10-bit ADC, two 8-bit and three 16-bit timers, two capture/compare/PWM modules, Enhanced USART, MSSP supporting SPI and I²C (Master/Slave), two analog comparators, and a hardware 8x8 multiplier. The nanoWatt technology provides power-managed modes including Idle, Sleep, and a low-power Timer1 oscillator for RTC operation.
The architecture uses a 16-bit instruction word with an 8-bit data path and a hardware multiply engine that executes an 8x8 unsigned multiply in a single instruction cycle. The Enhanced Flash supports ICSP (In-Circuit Serial Programming) and self-programming under firmware control, allowing field updates and bootloader designs. The 2.0V minimum supply opens the LF4620 to single-cell Li-ion or 2x AA alkaline applications while remaining drop-in compatible with the 5V PIC18F4620 (which requires 4.2V-5.5V).
Typical applications include industrial control panels, sensor signal conditioning, USB-to-UART bridges, HVAC thermostats, automotive body electronics, home appliances, and general-purpose embedded control boards. The 40-pin PDIP package supports hand-prototyping, breadboard use, and educational platforms, and is favored in through-hole designs where socketed or replaceable parts are required.
When designing with this part, note that the LF and F variants differ only in VDD range (2.0V-5.5V vs 4.2V-5.5V); firmware written for one generally runs on the other. The 40-MHz oscillator can be driven from an external source or ceramic resonator; for RTC accuracy, a 32.768-kHz crystal on Timer1 is recommended. Ensure MCLR is tied to VDD through a 10 kΩ pull-up for normal operation.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
חלופות תחליף ישיר עבור PIC18LF4620-I/P — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם PIC18LF4620-I/P (אותו גורם צורה וטביעת רגל) — שונים ב Package, Program Memory (Flash), Timers, ADC, Data EEPROM.
PIC18F4620-I/PT
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC18LF4520-I/PT
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC18F4620-I/PREL
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
PIC18LF4620-I/P דירוגים מרביים ומאפיינים חשמליים
| Device Family | PIC18F (PIC18LF4620) |
| Core Architecture | 8-bit RISC |
| Program Memory (Flash) | 64 KB (32K x 16) |
| Data Memory (SRAM) | 3968 bytes |
| Data EEPROM | 1024 bytes |
| Maximum CPU Speed | 40 MHz (10 MIPS) |
| Supply Voltage (VDD) | 2.0 V to 5.5 V |
| I/O Pins | 36 |
| ADC | 13 channels x 10-bit |
| Timers | 2 x 8-bit, 3 x 16-bit |
| Capture/Compare/PWM | 2 ECCP modules |
| Communication | Enhanced USART, MSSP (SPI / I²C) |
| Analog Comparators | 2 |
| מארז | 40-pin PDIP (0.600 in, 15.24 mm) |
| סוג הרכבה | Through-Hole (THT) |
| טמפרטורת פעולה | -40 °C to +85 °C (Industrial -I) |
| סטטוס RoHS | Compliant |
תצורת פינים של PIC18LF4620-I/P
| פין 1 | MCLR — Master Clear (reset, active low, internal pull-up disabled) |
| פין 2 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| פין 3 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| פין 4 | RA2/AN2/VREF- — PORTA bit 2 / Analog input 2 / ADC VREF- |
| פין 5 | RA3/AN3/VREF+ — PORTA bit 3 / Analog input 3 / ADC VREF+ |
| פין 6 | RA4/T0CKI/C1OUT — PORTA bit 4 / Timer0 clock / Comparator 1 output |
| פין 7 | RA5/AN4/SS/C2OUT — PORTA bit 5 / Analog input 4 / SPI slave select / Comparator 2 output |
| פין 8 | RE0/RD/AN5 — PORTE bit 0 / Parallel port read / Analog input 5 |
| פין 9 | RE1/WR/AN6 — PORTE bit 1 / Parallel port write / Analog input 6 |
| פין 10 | RE2/CS/AN7 — PORTE bit 2 / Parallel port chip select / Analog input 7 |
| פין 11 | VDD — Positive supply voltage (2.0V-5.5V) |
| פין 12 | VSS — Ground reference |
| פין 13 | OSC1/CLKI/RA7 — Oscillator input / External clock input / PORTA bit 7 |
| פין 14 | OSC2/CLKO/RA6 — Oscillator output / Clock output / PORTA bit 6 |
| פין 15 | RC0/T1OSO/T13CKI — PORTC bit 0 / Timer1 oscillator output / Timer1/Timer3 clock input |
| פין 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 I/O |
| פין 17 | RC2/CCP1 — PORTC bit 2 / CCP1 I/O |
| פין 18 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I²C clock |
| פין 19 | RD0/PSP0 — PORTD bit 0 / Parallel Slave Port bit 0 |
| פין 20 | RD1/PSP1 — PORTD bit 1 / Parallel Slave Port bit 1 |
| פין 21 | RD2/PSP2 — PORTD bit 2 / Parallel Slave Port bit 2 |
| פין 22 | RD3/PSP3 — PORTD bit 3 / Parallel Slave Port bit 3 |
| פין 23 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I²C data |
| פין 24 | RC5/SDO — PORTC bit 5 / SPI data out |
| פין 25 | RC6/TX/CK — PORTC bit 6 / USART transmit / USART clock |
| פין 26 | RC7/RX/DT — PORTC bit 7 / USART receive / USART data |
| פין 27 | RD4/PSP4 — PORTD bit 4 / Parallel Slave Port bit 4 |
| פין 28 | RD5/PSP5 — PORTD bit 5 / Parallel Slave Port bit 5 |
| פין 29 | RD6/PSP6/TX2 — PORTD bit 6 / Parallel Slave Port bit 6 / AUSART TX (4550 family) |
| פין 30 | RD7/PSP7/RX2 — PORTD bit 7 / Parallel Slave Port bit 7 / AUSART RX (4550 family) |
| פין 31 | VSS — Ground reference |
| פין 32 | VDD — Positive supply voltage (2.0V-5.5V) |
| פין 33 | RB0/INT0 — PORTB bit 0 / External interrupt 0 |
| פין 34 | RB1/INT1 — PORTB bit 1 / External interrupt 1 |
| פין 35 | RB2/INT2 — PORTB bit 2 / External interrupt 2 |
| פין 36 | RB3/CCP2 — PORTB bit 3 / CCP2 I/O (alternate) |
| פין 37 | RB4 — PORTB bit 4 (interrupt-on-change) |
| פין 38 | RB5 — PORTB bit 5 (interrupt-on-change) |
| פין 39 | RB6/PGC — PORTB bit 6 / ICSP clock (programming) |
| פין 40 | RB7/PGD — PORTB bit 7 / ICSP data (programming) |
יישומים טיפוסיים
PIC18LF4620-I/P מתאים עבור 6 יישוםs: Industrial Control Panels, HVAC Thermostats, Sensor Signal Conditioning Hubs, USB-to-UART/RS-485 Bridges, Educational / Maker Platforms, Home Appliance Control Boards.
Industrial Control Panels
The PIC18LF4620-I/P is well suited to industrial control panels requiring 36 digital I/O lines to drive relays, LEDs, keypads, and discrete inputs. Its 40 MHz core and 10 MIPS throughput handle encoder counting, PWM fan control, and protocol bridging on the same chip. The 13-channel 10-bit ADC reads thermistor, pressure, and 4-20 mA loop inputs directly. Wide 2.0V-5.5V supply tolerates noisy 24V industrial rails stepped down to 5V or 3.3V. The 64KB Flash and 3968-byte SRAM comfortably host a real-time operating system or Modbus RTU slave stack. Industrial temperature grade (-40 to +85 °C) ensures operation in unheated enclosures.
מומלץ
HVAC Thermostats
The PIC18LF4620's nanoWatt technology and wide 2.0V-5.5V supply make it ideal for 24VAC-rectified thermostat designs. Idle/Sleep current drops below 1 µA with Timer1 running on a 32.768-kHz crystal for RTC, while the 13-channel ADC reads indoor/outdoor temperature, humidity, and setpoint potentiometer. The 36 I/O pins drive a multiplexed LCD, pushbuttons, triac outputs for compressor/reversing-valve control, and a UART to indoor air-quality sensors. 64KB Flash and 3.9KB RAM support complex scheduling firmware with adaptive learning curves.
מומלץ
Sensor Signal Conditioning Hubs
In multi-sensor data acquisition nodes, the PIC18LF4620-I/P aggregates SPI, I²C, and analog signals and forwards them over Enhanced USART (RS-485). The MSSP peripheral simultaneously runs an I²C master reading external sensors while SPI drives a local display. The 13-channel 10-bit ADC at 100 ksps provides oversampled readings on thermistor and ratiometric bridges. With 64KB Flash, the firmware can host digital filtering, calibration tables, and a Modbus stack in one chip. The 40-pin PDIP package is breadboard-friendly for prototype development of sensor hubs.
מומלץ
USB-to-UART/RS-485 Bridges
While the PIC18LF4620 has no native USB, it pairs naturally with an external FT232 or MCP2200 USB-UART bridge to provide industrial RS-485 converter gateways. The Enhanced USART supports 9-bit addressing for multi-drop RS-485, and the MSSP adds an I²C gateway leg. 40 MHz throughput sustains 115.2 kbps UART and 1 Mbps SPI simultaneously. The 2.0V-5.5V supply allows 3.3V-powered bridges for low-power instrumentation. 64KB Flash accommodates Modbus/RTU, custom protocol parsers, and OTA-style firmware updates via the bootloader area.
מומלץ
Educational / Maker Platforms
The 40-pin PDIP package of PIC18LF4620-I/P is breadboard-friendly and supports repeated insertion/removal, making it a preferred MCU for university embedded courses, hobbyist trainers, and PICkit-programmer starter kits. Students gain access to USART, MSSP, ECCP, ADC, timers, and interrupts on a single device with 64KB Flash. The MPLAB X IDE supports this chip with C18/XC8 compilers. The 2.0V-5.5V supply is forgiving to student-wired power supplies, reducing accidental damage from 3.3V/5V mix-ups. Through-hole assembly requires no reflow oven or fine-pitch soldering skills.
מומלץ
Home Appliance Control Boards
In washing machines, dishwashers, and microwave ovens, the PIC18LF4620-I/P drives seven-segment or character LCD displays, keypad inputs, and triac-switched AC loads through optoisolators. The ECCP modules generate zero-crossing-synchronized PWM for proportional heater control. The 13-channel ADC reads water level, temperature, and motor current feedback. nanoWatt Sleep mode lets the appliance enter standby below 1 mA while still polling the keypad. 64KB Flash accommodates complex wash-cycle algorithms, fault logging, and diagnostic menus.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור PIC18LF4620-I/P — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | PIC18F4620-I/P | PIC18LF4520-I/P | PIC18F4620-I/PREL |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 40-pin PDIP | 40-pin PDIP - same | 40-pin PDIP - same | 40-pin PDIP - same |
| Program Memory | 64 KB Flash | 64 KB Flash | 32 KB Flash (-50%) | 64 KB Flash |
| RAM | 3968 bytes | 3968 bytes | 1536 bytes (-61%) | 3968 bytes |
| Supply Voltage | 2.0 V to 5.5 V | 4.2 V to 5.5 V | 2.0 V to 5.5 V | 4.2 V to 5.5 V |
| Max Clock Speed | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) |
| I/O Pins | 36 | 36 | 36 | 36 |
| ADC | 13 x 10-bit | 13 x 10-bit | 13 x 10-bit | 13 x 10-bit |
| Operating Temperature | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C |
מבדילים עיקריים
- Wide 2.0V-5.5V supply supports battery-powered and 3.3V designs (לעומתPIC18F4620-I/P)
- 64 KB Flash and 3968 bytes RAM - largest in the PIC18F4620 generation (לעומתPIC18LF4520-I/P)
- Through-hole PDIP-40 package for breadboard and hand-prototype use (לעומתPIC18LF4620-I/PT (TQFP-44))
הערות תכנון
PIC18LF4620-I/P VDD pins are 11 and 32; both must be decoupled with 100 nF ceramic caps placed within 5 mm of each pin. Add a bulk 10 µF tantalum or aluminum-polymer cap at the board entry point. The wide 2.0V-5.5V supply allows direct 3.3 V regulator output (e.g. MCP1700) without level shifters; for 5 V systems use an LDO like MCP1825S. Average active current at 40 MHz and 5 V is approximately 16 mA; nanoWatt Sleep drops this below 1 µA with Timer1 running on a 32.768 kHz crystal.
Do not confuse PIC18LF4620 (2.0V-5.5V) with PIC18F4620 (4.2V-5.5V): firmware designed for the LF version running on the F version at 3.3V will brown out the supply. PIC18LF4620-I/PT and PIC18LF4620-I/ML are TQFP-44 and QFN-44 surface-mount variants — they are NOT drop-in replacements for the PDIP-40 -I/P. Confirm package code suffix (-I/P, -I/PT, -I/ML) on the order. MCLR requires a 10 kΩ pull-up to VDD; leaving MCLR floating causes erratic resets.
Keep the 40-MHz crystal or resonator traces under 5 mm and symmetric. Place a 1 MΩ resistor across the crystal or use a 4-component Pierce oscillator layout per Microchip AN826. For ADC accuracy, route analog traces (AN0-AN7) away from digital switching signals; the 13-channel ADC can sample at up to 100 ksps. Add a ground pour under the analog section and stitch VSS pins 12 and 31 with multiple vias to the ground plane to reduce ADC reference drift.
The MSSP peripheral shares RC3 (SCL/SCK) and RC4 (SDA/SDI) between I²C and SPI modes - firmware must reconfigure TRIS bits when switching. For I²C buses above 400 kHz, add 4.7 kΩ pull-ups on SCL/SDA and place a 100 pF cap to suppress ringing. The Enhanced USART on RC6/RC7 supports 9-bit protocol, useful for RS-485 multi-drop addressing.
מידע על תאימות
RoHS-compliant per Microchip product page. Industrial (-I) temperature grade -40 °C to +85 °C. Not AEC-Q100 qualified - for AEC-Q100 automotive, look at PIC18F4620-I/P automotive extensions or PIC18F66 family.
