PIC18LF4620-I/P - 8-bit 40MHz MCU 64KB Flash 40-PDIP | Microchip
Référence : PIC18LF4620-I/P ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $15.14 | $15,14 |
| 10 | $13.5 | $135,00 |
| 100 | $11.2 | $1 120,00 |
| 500 | $9.4 | $4 700,00 |
| 1 000 | $8.3 | $8 300,00 |
PIC18LF4620-I/P Présentation
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.
Alternatives de remplacement direct pour PIC18LF4620-I/P — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec PIC18LF4620-I/P (même facteur de forme et même empreinte) — différant par Package, Program Memory (Flash), Timers, ADC, Data EEPROM.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
PIC18F4620-I/PT
✅ Remplacement direct✓ En stock
$5.45 / unité
Voir la fiche technique →PIC18LF4520-I/PT
✅ Remplacement direct✓ En stock
$5.21 / unité
Voir la fiche technique →PIC18F4620-I/PREL
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PIC18LF4620-I/P Valeurs maximales et caractéristiques électriques
| 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 |
| Boîtier | 40-pin PDIP (0.600 in, 15.24 mm) |
| Type de montage | Through-Hole (THT) |
| Température de fonctionnement | -40 °C to +85 °C (Industrial -I) |
| Statut RoHS | Compliant |
Configuration des broches de PIC18LF4620-I/P
| Broche 1 | MCLR — Master Clear (reset, active low, internal pull-up disabled) |
| Broche 2 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| Broche 3 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| Broche 4 | RA2/AN2/VREF- — PORTA bit 2 / Analog input 2 / ADC VREF- |
| Broche 5 | RA3/AN3/VREF+ — PORTA bit 3 / Analog input 3 / ADC VREF+ |
| Broche 6 | RA4/T0CKI/C1OUT — PORTA bit 4 / Timer0 clock / Comparator 1 output |
| Broche 7 | RA5/AN4/SS/C2OUT — PORTA bit 5 / Analog input 4 / SPI slave select / Comparator 2 output |
| Broche 8 | RE0/RD/AN5 — PORTE bit 0 / Parallel port read / Analog input 5 |
| Broche 9 | RE1/WR/AN6 — PORTE bit 1 / Parallel port write / Analog input 6 |
| Broche 10 | RE2/CS/AN7 — PORTE bit 2 / Parallel port chip select / Analog input 7 |
| Broche 11 | VDD — Positive supply voltage (2.0V-5.5V) |
| Broche 12 | VSS — Ground reference |
| Broche 13 | OSC1/CLKI/RA7 — Oscillator input / External clock input / PORTA bit 7 |
| Broche 14 | OSC2/CLKO/RA6 — Oscillator output / Clock output / PORTA bit 6 |
| Broche 15 | RC0/T1OSO/T13CKI — PORTC bit 0 / Timer1 oscillator output / Timer1/Timer3 clock input |
| Broche 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 I/O |
| Broche 17 | RC2/CCP1 — PORTC bit 2 / CCP1 I/O |
| Broche 18 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I²C clock |
| Broche 19 | RD0/PSP0 — PORTD bit 0 / Parallel Slave Port bit 0 |
| Broche 20 | RD1/PSP1 — PORTD bit 1 / Parallel Slave Port bit 1 |
| Broche 21 | RD2/PSP2 — PORTD bit 2 / Parallel Slave Port bit 2 |
| Broche 22 | RD3/PSP3 — PORTD bit 3 / Parallel Slave Port bit 3 |
| Broche 23 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I²C data |
| Broche 24 | RC5/SDO — PORTC bit 5 / SPI data out |
| Broche 25 | RC6/TX/CK — PORTC bit 6 / USART transmit / USART clock |
| Broche 26 | RC7/RX/DT — PORTC bit 7 / USART receive / USART data |
| Broche 27 | RD4/PSP4 — PORTD bit 4 / Parallel Slave Port bit 4 |
| Broche 28 | RD5/PSP5 — PORTD bit 5 / Parallel Slave Port bit 5 |
| Broche 29 | RD6/PSP6/TX2 — PORTD bit 6 / Parallel Slave Port bit 6 / AUSART TX (4550 family) |
| Broche 30 | RD7/PSP7/RX2 — PORTD bit 7 / Parallel Slave Port bit 7 / AUSART RX (4550 family) |
| Broche 31 | VSS — Ground reference |
| Broche 32 | VDD — Positive supply voltage (2.0V-5.5V) |
| Broche 33 | RB0/INT0 — PORTB bit 0 / External interrupt 0 |
| Broche 34 | RB1/INT1 — PORTB bit 1 / External interrupt 1 |
| Broche 35 | RB2/INT2 — PORTB bit 2 / External interrupt 2 |
| Broche 36 | RB3/CCP2 — PORTB bit 3 / CCP2 I/O (alternate) |
| Broche 37 | RB4 — PORTB bit 4 (interrupt-on-change) |
| Broche 38 | RB5 — PORTB bit 5 (interrupt-on-change) |
| Broche 39 | RB6/PGC — PORTB bit 6 / ICSP clock (programming) |
| Broche 40 | RB7/PGD — PORTB bit 7 / ICSP data (programming) |
Applications typiques
PIC18LF4620-I/P convient pour 6 applications: 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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PIC18LF4620-I/P — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | 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 |
Principaux différenciateurs
- Wide 2.0V-5.5V supply supports battery-powered and 3.3V designs (vs PIC18F4620-I/P)
- 64 KB Flash and 3968 bytes RAM - largest in the PIC18F4620 generation (vs PIC18LF4520-I/P)
- Through-hole PDIP-40 package for breadboard and hand-prototype use (vs PIC18LF4620-I/PT (TQFP-44))
Notes de conception
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.
Informations de conformité
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.
