PIC18LF4420-I/PT - 8-bit 40MHz MCU 16KB Flash 44-TQFP | Microchip
Référence : PIC18LF4420-I/PT ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $8.4 | $8,40 |
| 10 | $7.56 | $75,60 |
| 100 | $6.72 | $672,00 |
| 500 | $6.05 | $3 025,00 |
| 1 000 | $5.71 | $5 710,00 |
PIC18LF4420-I/PT Présentation
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, peripherals, and I/O into one package. The PIC18 family is Microchip's enhanced 8-bit architecture that sits between the baseline PIC16 family and the 16-bit dsPIC family. Within this hierarchy, the PIC18LF4420 belongs to the PIC18F4420 sub-family, which targets general-purpose embedded control with on-chip 10-bit ADC, multiple timers, and communication peripherals.
Key features include 36 digital I/O pins, a 10-bit ADC with up to 13 input channels, two capture/compare/PWM modules, two USART modules, an SPI/I2C master/slave MSSP peripheral, and a 13-channel ADC. The device supports in-circuit serial programming (ICSP) and in-circuit debugging via two program/debug pins, enabling direct flash programming on the assembled PCB without removing the device.
The PIC18LF4420-I/PT employs an enhanced Harvard architecture with a 16-bit instruction word and 8-bit data path, achieving 200ns minimum instruction execution at 40MHz. Internal Phase-Locked Loop (PLL) support and an internal 31kHz to 8MHz oscillator reduce external component count, while the nanoWatt technology provides multiple power-managed modes (Idle, Sleep) for battery-powered applications.
Typical applications include industrial control panels, automotive body electronics (non-safety), sensor node interfaces, HVAC controllers, low-power remote controls, and consumer white goods. The wide 2.0V to 5.5V operating range supports both 3.3V and 5V system designs.
When designing with this device, ensure decoupling capacitor placement (100nF) close to VDD pins and that MCLR is pulled high through a resistor for normal operation. The 44-TQFP package has a relatively large 10x10 mm footprint - if board space is critical, consider the QFN-package variant PIC18LF4420-I/ML.
This page synthesizes distributor pricing, drop-in PIC18F/LF family alternatives, and practical design notes not found in the manufacturer datasheet.
Alternatives de remplacement direct pour PIC18LF4420-I/PT — 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 PIC18LF4420-I/PT (même facteur de forme et même empreinte) — différant par Package, Timers, Core Architecture, Operating Temperature, CCP Modules.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
PIC18F4420-I/PT
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
PIC18LF4520-I/PT
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$5.21 / unité
Voir la fiche technique →PIC18F4520-I/PT
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$4.05 / unité
Voir la fiche technique →PIC18LF4320-I/PT
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$5.9 / unité
Voir la fiche technique →PIC18LF4420-I/PT Valeurs maximales et caractéristiques électriques
| Core Architecture | PIC18 (8-bit RISC, enhanced Harvard) |
| CPU Core | PIC18 (16-bit instruction, 8-bit data) |
| Fréquence d'horloge maximale | 40 MHz (10 MIPS) |
| Program Memory Type | FLASH |
| Program Memory Size | 16 KB (8K x 16 words) |
| RAM Size | 768 bytes |
| EEPROM Size | 256 bytes |
| Supply Voltage Range | 2.0 V to 5.5 V |
| Plage de température de fonctionnement | -40C to +85C (Industrial) |
| I/O Pins | 36 |
| ADC | 10-bit, up to 13 channels |
| Timers | 4 (Timer0, Timer1, Timer2, Timer3) |
| CCP Modules | 2 (Capture/Compare/PWM) |
| Communication | 1x MSSP (SPI/I2C), 1x USART (EUSART) |
| Boîtier | 44-pin TQFP (PT) 10x10 mm |
| Type de montage | Surface Mount |
| Niveau MSL | 3 (168 hours) |
| Statut RoHS | Compliant |
Configuration des broches de PIC18LF4420-I/PT
| Broche 1 | MCLR — Master Clear (Reset) input, active low |
| Broche 2 | RA0/AN0 — Port A bit 0 / Analog input 0 |
| Broche 3 | RA1/AN1 — Port A bit 1 / Analog input 1 |
| Broche 4 | RA2/AN2/VREF- — Port A bit 2 / Analog input 2 / ADC VREF- |
| Broche 5 | RA3/AN3/VREF+ — Port A bit 3 / Analog input 3 / ADC VREF+ |
| Broche 6 | RA4/T0CKI — Port A bit 4 / Timer0 clock input |
| Broche 7 | RA5/AN4/SS — Port A bit 5 / Analog input 4 / SPI Slave Select |
| Broche 8 | RE0/RD/AN5 — Port E bit 0 / Parallel port Read / Analog input 5 |
| Broche 9 | RE1/WR/AN6 — Port E bit 1 / Parallel port Write / Analog input 6 |
| Broche 10 | RE2/CS/AN7 — Port E bit 2 / Parallel port Chip Select / Analog input 7 |
| Broche 11 | VDD — Positive supply voltage |
| Broche 12 | VSS — Ground reference |
| Broche 13 | OSC1/CLKI/RA7 — Oscillator input / External clock / Port A bit 7 |
| Broche 14 | OSC2/CLKO/RA6 — Oscillator output / Clock output / Port A bit 6 |
| Broche 15 | RC0/T1OSO/T1CKI — Port C bit 0 / Timer1 oscillator output / Timer1 clock input |
| Broche 16 | RC1/T1OSI/CCP2 — Port C bit 1 / Timer1 oscillator input / CCP2 output |
| Broche 17 | RC2/CCP1 — Port C bit 2 / CCP1 output |
| Broche 18 | RC3/SCK/SCL — Port C bit 3 / SPI clock / I2C clock |
| Broche 19 | RD0/PSP0 — Port D bit 0 / Parallel Slave Port bit 0 |
| Broche 20 | RD1/PSP1 — Port D bit 1 / Parallel Slave Port bit 1 |
| Broche 21 | RD2/PSP2 — Port D bit 2 / Parallel Slave Port bit 2 |
| Broche 22 | RD3/PSP3 — Port D bit 3 / Parallel Slave Port bit 3 |
| Broche 23 | RC4/SDI/SDA — Port C bit 4 / SPI data in / I2C data |
| Broche 24 | RC5/SDO — Port C bit 5 / SPI data out |
| Broche 25 | RC6/TX/CK — Port C bit 6 / EUSART TX / EUSART clock |
| Broche 26 | RC7/RX/DT — Port C bit 7 / EUSART RX / EUSART data |
| Broche 27 | RD4/PSP4 — Port D bit 4 / Parallel Slave Port bit 4 |
| Broche 28 | RD5/PSP5 — Port D bit 5 / Parallel Slave Port bit 5 |
| Broche 29 | RD6/PSP6 — Port D bit 6 / Parallel Slave Port bit 6 |
| Broche 30 | RD7/PSP7 — Port D bit 7 / Parallel Slave Port bit 7 |
| Broche 31 | VSS — Ground reference |
| Broche 32 | VDD — Positive supply voltage |
| Broche 33 | RB0/INT0 — Port B bit 0 / External interrupt 0 |
| Broche 34 | RB1/INT1 — Port B bit 1 / External interrupt 1 |
| Broche 35 | RB2/INT2 — Port B bit 2 / External interrupt 2 |
| Broche 36 | RB3/INT3/CCP2 — Port B bit 3 / External interrupt 3 / CCP2 alternate |
| Broche 37 | RB4 — Port B bit 4 |
| Broche 38 | RB5 — Port B bit 5 |
| Broche 39 | RB6/PGC — Port B bit 6 / ICSP clock |
| Broche 40 | RB7/PGD — Port B bit 7 / ICSP data |
| Broche 41 | VSS — Ground reference (additional) |
| Broche 42 | NC — Not connected (per datasheet) |
| Broche 43 | AVDD — Analog positive supply (connect to VDD if ADC unused) |
| Broche 44 | AVSS — Analog ground (connect to VSS if ADC unused) |
Applications typiques
PIC18LF4420-I/PT convient pour 6 applications: Industrial Control Panels, HVAC Thermostat Controllers, Automotive Body Electronics, Sensor Node / Data Logger, Consumer White Goods, Battery-Powered Remote Controls.
Industrial Control Panels
The PIC18LF4420-I/PT fits industrial control panels due to its 36 I/O pins, 13-channel 10-bit ADC, and 2.0V-5.5V supply tolerance that withstands 24V-sourced rails with LDO regulation. Its 40MHz CPU executes PLC-style logic within sub-microsecond response times, while the 16KB FLASH supports ladder-logic-to-C translation libraries. The -40C to +85C industrial temperature rating meets IEC 61131-2 panel environment specs.
Recommandé
HVAC Thermostat Controllers
HVAC thermostats benefit from the PIC18LF4420-I/PT's nanoWatt sleep modes and 2.0V minimum supply, enabling multi-year battery life on 2xAA cells. Its 13-channel ADC handles NTC thermistor inputs for indoor/outdoor/coil temperature sensing, while the CCP modules drive triac-controlled blower and compressor stages. The 16KB FLASH accommodates wireless protocol stacks (Zigbee sub-GHz, BLE) with room for application code.
Recommandé
Automotive Body Electronics
Non-safety automotive body modules such as seat controllers, mirror adjusters, and lighting drivers use the PIC18LF4420-I/PT for its 40MHz CPU and CAN-friendly EUSART peripherals. While not AEC-Q100 qualified, the -40C to +85C temperature range covers most passenger-compartment applications. Its 36 I/O pins handle multiple motor H-bridges and LED matrix drivers without external MUX.
Recommandé
Sensor Node / Data Logger
Wireless sensor nodes leverage the PIC18LF4420-I/PT's sub-microamp sleep current and 13-channel ADC to poll multiple sensors (temperature, humidity, pressure) over extended periods. The SPI MSSP interfaces directly to LoRa or sub-GHz transceivers, while the EUSART provides RS-485 wired connectivity. The 768-byte RAM buffers sensor data between wake cycles, and 16KB FLASH fits custom protocol stacks plus calibration tables.
Recommandé
Consumer White Goods
Washing machines, dishwashers, and microwave ovens employ the PIC18LF4420-I/PT for user-interface control with keypad scanning, LCD driving via MSSP, and triac-controlled motor actuation. The 2.0V-5.5V supply handles rectified mains with simple LDO regulation. The 16KB FLASH supports graphical UI bitmaps and appliance-state machines, while 768 bytes RAM holds UI buffers during display updates.
Recommandé
Battery-Powered Remote Controls
RF remote controls benefit from the PIC18LF4420-I/PT's 2.0V minimum supply that operates from a single CR2032 cell (3V nominal) down to 2V end-of-life. The EUSART/MSSP drives sub-GHz or BLE SoCs via SPI, and nanoWatt sleep modes extend coin-cell life to multi-year durations. The 16KB FLASH accommodates user-customizable button mapping and IR/RF protocol libraries.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PIC18LF4420-I/PT — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | PIC18F4420-I/PT | PIC18LF4520-I/PT | PIC18F4520-I/PT | PIC18LF4320-I/PT |
|---|---|---|---|---|---|
| Package | 44-TQFP (PT) 10x10 mm | 44-TQFP (PT) 10x10 mm | 44-TQFP (PT) 10x10 mm | 44-TQFP (PT) 10x10 mm | 44-TQFP (PT) 10x10 mm |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 16 KB FLASH | 16 KB FLASH | 32 KB FLASH | 32 KB FLASH | 8 KB FLASH |
| 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 | 2.0 V to 5.5 V |
| Maximum Clock | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) |
| RAM | 768 bytes | 768 bytes | 1536 bytes | 1536 bytes | 512 bytes |
| EEPROM | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| RoHS Status | Compliant | Compliant | Compliant | Compliant | Compliant |
Principaux différenciateurs
- Lower minimum supply voltage for battery-powered designs (vs PIC18F4420-I/PT)
- Lower quiescent current in sleep mode (vs PIC18F4420-I/PT)
- Smaller package footprint variant available (vs PIC18LF4420-I/PT (this part))
Notes de conception
Place 100nF decoupling capacitors as close as possible to each VDD pin (pins 11, 32) and a bulk 10uF tantalum or ceramic capacitor at the VDD rail entry. The PIC18LF4420-I/PT draws brief high-current spikes during FLASH programming/erase operations - inadequate decoupling leads to programming failures or runtime glitches. Add a 10uF + 100nF combination at the regulator output if powering from a switching converter.
The 44-TQFP package requires careful PCB layout to support ICSP (In-Circuit Serial Programming) and ICD (In-Circuit Debugging). Route the PGD (pin 40) and PGC (pin 39) signals with short, direct traces to a 6-pin header placed at the board edge. The MCLR pin (pin 1) must have a 10kohm pull-up to VDD and a 100nF cap to ground for in-circuit debug stability - never leave MCLR floating.
Do not confuse the LF (low-voltage) variant with the F variant - the LF supports 2.0V minimum but the F requires 4.2V minimum. If migrating a PIC18F4420 design to PIC18LF4420, no software changes are required, but verify the brown-out and voltage regulator configuration bits match the new supply range. The configuration bits are at FLASH address 0x300000 and 0x300001 and must be set correctly to enable the internal oscillator and disable the watchdog if not used.
When using the external oscillator (HS or XT mode), keep the crystal traces short and surround them with a ground pour to minimize EMI. For the internal 8MHz oscillator (default after factory reset), no external components are needed but the frequency tolerance is +/- 2% over temperature. For USB or UART applications requiring tight baud-rate accuracy, use a crystal with the HS PLL mode or switch to an F4520 with internal PLL.
Informations de conformité
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - for automotive safety applications consider dsPIC33 or PIC18 K-series AEC-Q100 qualified parts.