PIC18LF4220T-I/ML - 4KB Flash 8-bit MCU 44-VQFN | Microchip
MPN: PIC18LF4220T-I/ML ✓ Hoạt độngPIC18LF4220T-I/ML Tóm tắt
An 8-bit PIC microcontroller is a RISC-based single-chip computer that integrates CPU core, Flash program memory, RAM, EEPROM, peripherals, and I/O on one die. Within the broader taxonomy it sits as a microcontroller -> embedded controller -> semiconductor -> integrated circuit. The PIC18 family specifically uses a 16-bit instruction word with 8-bit data path and a modified Harvard architecture, delivering deterministic instruction timing and an interrupt structure suitable for real-time embedded control.
Key features include 4 KB self-programmable Flash, 512 bytes SRAM, 256 bytes data EEPROM, hardware USART, MSSP (SPI/I2C), a 10-bit ADC, two 8-bit and one 16-bit timer, and nanoWatt power-saving modes (Idle, Sleep, Run modes) with on-board low-power Timer1 oscillator. The 44-VQFN exposed pad package is specified to 8x8 mm with 0.65 mm pitch for compact SMD layouts, and the -I temperature grade covers the industrial -40C to +85C range.
Typical applications include industrial sensor nodes, low-power remote controls, small appliance controllers, HVAC interface boards, battery-backed instrumentation, USB HID firmware (with companion parts), and consumer white-goods main boards. The wide voltage range and nanoWatt modes make this part attractive for energy-constrained designs.
When designing with this device, ensure the exposed thermal pad is soldered to a sufficiently large copper pour for mechanical and thermal performance; missing this connection reduces power dissipation capability and can violate the solder-joint reliability spec. The wide VDD range simplifies direct battery connection without external LDO stages.
This page synthesizes verified distributor pricing, drop-in replacement options, and engineering design notes drawn from manufacturer documentation, providing information not assembled on any single distributor or manufacturer page.
Bộ thay thế dễ dàng lắp đặt cho PIC18LF4220T-I/ML — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC18LF4220T-I/ML (cùng hình factor và footprint) — khác nhau ở Package, Timers, Operating Temperature, Core Architecture, Communication.
PIC18LF4320T-I/ML
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF4220-I/ML
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF4620-I/ML
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF2420T-I/ML
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F4220T-I/ML
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF2320T-I/ML
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18LF4220T-I/ML Tỷ lệ tối đa & tính chất điện
| Family | PIC18F |
| Core | 8-bit PIC RISC (modified Harvard) |
| Program Memory (Flash) | 4 KB (2K x 16) |
| RAM | 512 bytes |
| EEPROM | 256 bytes |
| Maximum CPU Frequency | 40 MHz @ 5V |
| Operating Voltage (VDD) | 2.0 V to 5.5 V (LF wide-range core) |
| Digital I/O Pins | 36 |
| ADC | 10-bit, up to 13 channels |
| Timers | 2x 8-bit, 1x 16-bit (Timer1/3) |
| Communication | 1x USART (EUSART), 1x MSSP (SPI / I2C) |
| Hộp | 44-pin VQFN with exposed thermal pad (8x8 mm, 0.65 mm pitch) |
| Kiểu lắp đặt | Surface Mount |
| Nhiệt độ hoạt động | -40C to +85C (Industrial, 'I') |
| Power-Saving Features | nanoWatt Technology (Idle / Sleep / Run modes, low-power Timer1 oscillator) |
| ICSP / In-Circuit Programming | Yes (ICSP via PGC/PGD) |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC18LF4220T-I/ML
| Chân 1 | RA2/AN2/VREF- — Digital I/O / Analog input 2 / DAC negative reference |
| Chân 2 | RA3/AN3/VREF+ — Digital I/O / Analog input 3 / DAC positive reference |
| Chân 3 | RA4/T0CKI/RCV — Digital I/O / Timer0 clock input / USART RCV |
| Chân 4 | RA5/AN4/SS/HLVDIN — Digital I/O / Analog input 4 / SPI Slave Select / High/Low Voltage Detect input |
| Chân 5 | RA6/OSC2/CLKO — Digital I/O / Oscillator crystal output / Clock output |
| Chân 6 | RA7/OSC1/CLKI — Digital I/O / Oscillator crystal input / Clock input |
| Chân 7 | VDD — Positive supply voltage |
| Chân 8 | VSS — Ground reference |
| Chân 9 | RB0/INT0/FLT0 — Digital I/O / External interrupt 0 / PWM Fault input |
| Chân 10 | RB1/INT1 — Digital I/O / External interrupt 1 |
| Chân 11 | RB2/INT2 — Digital I/O / External interrupt 2 |
| Chân 12 | RB3/INT3/CCP2A — Digital I/O / External interrupt 3 / CCP2 channel A |
| Chân 13 | RB4/KBI0 — Digital I/O / Interrupt-on-change bit 0 |
| Chân 14 | RB5/KBI1 — Digital I/O / Interrupt-on-change bit 1 |
| Chân 15 | RB6/KBI2/PGC — Digital I/O / Interrupt-on-change bit 2 / ICSP clock |
| Chân 16 | RB7/KBI3/PGD — Digital I/O / Interrupt-on-change bit 3 / ICSP data |
| Chân 17 | VDD — Positive supply voltage |
| Chân 18 | VSS — Ground reference |
| Chân 19 | RC0/T1OSO/T13CKI — Digital I/O / Timer1 oscillator output / Timer1/Timer3 clock |
| Chân 20 | RC1/T1OSI/CCP2B — Digital I/O / Timer1 oscillator input / CCP2 channel B |
| Chân 21 | RC2/CCP1 — Digital I/O / CCP1 PWM/capture/compare |
| Chân 22 | RC3/SCK/SCL — Digital I/O / SPI clock / I2C clock |
| Chân 23 | RC4/SDI/SDA — Digital I/O / SPI data in / I2C data |
| Chân 24 | RC5/SDO — Digital I/O / SPI data out |
| Chân 25 | RC6/TX/CK — Digital I/O / USART TX / Clock |
| Chân 26 | RC7/RX/DT — Digital I/O / USART RX / Data |
| Chân 27 | VDD — Positive supply voltage |
| Chân 28 | VSS — Ground reference |
| Chân 29 | RD0/PSP0 — Digital I/O / Parallel Slave Port bit 0 |
| Chân 30 | RD1/PSP1 — Digital I/O / Parallel Slave Port bit 1 |
| Chân 31 | RD2/PSP2 — Digital I/O / Parallel Slave Port bit 2 |
| Chân 32 | RD3/PSP3 — Digital I/O / Parallel Slave Port bit 3 |
| Chân 33 | RD4/PSP4 — Digital I/O / Parallel Slave Port bit 4 |
| Chân 34 | RD5/PSP5/PMD5 — Digital I/O / Parallel Slave Port bit 5 |
| Chân 35 | RD6/PSP6/PMD6 — Digital I/O / Parallel Slave Port bit 6 |
| Chân 36 | RD7/PSP7/PMD7 — Digital I/O / Parallel Slave Port bit 7 |
| Chân 37 | RE0/RD/AN5 — Digital I/O / Read control / Analog input 5 |
| Chân 38 | RE1/WR/AN6 — Digital I/O / Write control / Analog input 6 |
| Chân 39 | RE2/CS/AN7 — Digital I/O / Chip Select / Analog input 7 |
| Chân 40 | AVDD — Analog positive supply (must be tied to VDD) |
| Chân 41 | AVSS — Analog ground (must be tied to VSS) |
| Chân 42 | MCLR/VPP/RE3 — Reset input (active low) / Programming voltage / Digital I/O |
| Chân 43 | RA0/AN0/ULPWU — Digital I/O / Analog input 0 / Ultra Low-Power Wake-up input |
| Chân 44 | RA1/AN1 — Digital I/O / Analog input 1 |
| Chân 45 | EP — Exposed thermal pad - must be soldered to ground pour per datasheet |
Ứng dụng tiêu biểu
PIC18LF4220T-I/ML phù hợp cho 6 Áp dụngs: Battery-Powered Sensor Node, Industrial Control Interface Board, Small Appliance Main Board, HVAC Sensor and Interface Module, Low-Cost Remote Control Transmitter, Energy Metering Sub-Board.
Battery-Powered Sensor Node
The PIC18LF4220T-I/ML's 2.0-5.5 V VDD range and nanoWatt Technology make it ideal for battery-powered sensor nodes. Typical supply current in Sleep mode is below 100 nA, and the 10-bit ADC with up to 13 input channels can digitize temperature, battery voltage, and environmental sensors without external analog front-end. Placing the MCU in a 44-VQFN exposed-pad package on a compact SMD board enables years of operation from 2x AA cells with duty-cycled wake-on-interrupt from the integrated low-power Timer1.
Được đề xuất
Industrial Control Interface Board
With 36 digital I/O pins, USART, MSSP (SPI/I2C), and a 10-bit ADC, the PIC18LF4220T-I/ML fits industrial control interface boards for motor drivers, valve controllers, and panel interfaces. The -40C to +85C industrial temperature grade handles factory floor conditions, and the wide 2.0-5.5 V supply allows direct 24V-bus-derived power with a simple linear regulator. The exposed-pad 44-VQFN package provides robust thermal dissipation for sustained I/O switching loads.
Được đề xuất
Small Appliance Main Board
The PIC18LF4220T-I/ML is well-suited as the main controller for small appliances such as coffee makers, blenders, and washing machine sub-boards. The 4 KB Flash supports feature firmware, the 10-bit ADC reads NTC temperature sensors, and the PWM module drives TRIAC or IGBT motor stages. The 2.0-5.5 V supply accepts either rectified mains-derived 5 V or 2x AA backup for clock retention, and the 44-VQFN exposed-pad layout supports reflow soldering at high volume.
Được đề xuất
HVAC Sensor and Interface Module
The PIC18LF4220T-I/ML's nanoWatt Technology and wide VDD range make it suitable for HVAC sensor modules that measure temperature, airflow, and humidity while running an LCD keypad interface. Its 36 I/O pins drive character LCDs, keypads, and relay coils without external logic. Industrial-grade -40C to +85C operation covers rooftop and basement installations, and the 44-VQFN exposed-pad package withstands conformal coating for humid environments.
Được đề xuất
Low-Cost Remote Control Transmitter
For low-cost RF remote controls and IR transmitters, the PIC18LF4220T-I/ML delivers low Sleep current that preserves coin-cell battery life, while its 4 KB Flash holds custom protocol stacks. The 40 MHz CPU clock generates accurate IR carrier frequencies via PWM, and the USART drives UART-based RF modules. The 44-VQFN exposed-pad package supports miniaturized PCB designs typical of handheld transmitters, and the ICSP pins enable factory programming.
Được đề xuất
Energy Metering Sub-Board
The PIC18LF4220T-I/ML functions as a metering sub-board MCU for single-phase energy meters, with its 10-bit ADC digitizing current and voltage shunt outputs, and USART forwarding data to a main display MCU. The 2.0-5.5 V supply operates from the meter's regulated rail, the 256-byte EEPROM stores calibration constants, and the industrial -40C to +85C grade meets outdoor enclosure requirements. The 44-VQFN package and exposed pad support compact meter form factors.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18LF4220T-I/ML — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | PIC18LF4320T-I/ML | PIC18LF4220-I/ML | PIC18LF4620-I/ML | PIC18LF2420T-I/ML | PIC18F4220T-I/ML | PIC18LF2320T-I/ML |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-VQFN (ML) - 8x8 mm exposed pad | 44-VQFN (ML) - same | 44-VQFN (ML) - same | 44-VQFN (ML) - same | 44-VQFN (ML) - same | 44-VQFN (ML) - same | 44-VQFN (ML) - same |
| Program Flash | 4 KB | 8 KB | 4 KB | 64 KB | 16 KB | 4 KB | 8 KB |
| RAM | 512 bytes | 512 bytes | 512 bytes | 3.6 KB | 768 bytes | 512 bytes | 512 bytes |
| Operating Voltage (VDD) | 2.0 V to 5.5 V (LF) | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 4.2 V to 5.5 V (F core) | 2.0 V to 5.5 V |
| Max CPU Frequency | 40 MHz @ 5V | 40 MHz @ 5V | 40 MHz @ 5V | 40 MHz @ 5V | 40 MHz @ 5V | 40 MHz @ 5V | 40 MHz @ 5V |
| Digital I/O | 36 | 36 | 36 | 36 | 36 | 36 | 23 |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| nanoWatt / Low-Power | Yes (Idle/Sleep/Run) | Yes | Yes | Yes | Yes | Yes | Yes |
Bảo phân biệt quan trọng
- Lowest VDD minimum for battery-only operation in the PIC18F4220 family (vsPIC18F4220T-I/ML)
- Drop-in firmware headroom without PCB rework (vsPIC18LF4320T-I/ML)
- nanoWatt Technology for sub-microamp Sleep current (vsPIC18LF2320T-I/ML)
Ghi chú thiết kế
Estimated: the 44-VQFN exposed-pad package dissipates power primarily through its exposed pad (EP / pin 45). When the EP is soldered to a 1 square inch ground pour on a 2-layer FR4 board, theta_JA is typically in the 30-35 C/W range. At maximum 40 MHz operation from 5 V drawing roughly 11 mA, total power is ~55 mW and junction rise above ambient is well under 5 C. For continuous high-current GPIO switching, increasing the EP copper area to 2 square inches further reduces thermal resistance.
Place 0.1 uF ceramic bypass capacitors as close as possible to each VDD/VSS pair (pins 7/8, 17/18, 27/28) and a single 10 uF bulk capacitor near the supply pin. Keep the exposed pad continuous under the IC with multiple thermal vias to the bottom layer. The ICSP pins (RB6/PGC, RB7/PGD) should be routed to a 5-pin header with MCLR (pin 42) tied to VDD via 10 kohm pull-up for in-circuit programming and debugging.
The LF core accepts 2.0 V to 5.5 V; verify your brown-out and voltage-regulator behavior. When using Sleep mode for power savings, set all unused peripherals to off in their respective SFRs before issuing the Sleep instruction to minimize leakage. Use Timer1 with a 32.768 kHz crystal on RC0/RC1 for low-power timekeeping - the dedicated low-power Timer1 oscillator can keep the rest of the chip in Sleep while the timer keeps counting.
The exposed pad (pin 45) MUST be soldered to the PCB - omitting it causes both mechanical reliability failures and degraded thermal performance. Do not assume the LF suffix means identical silicon to the F variant; only operate at 2.0 V if the LF datasheet specifically allows it. The AVDD/AVSS pins (40/41) should be tied to VDD/VSS even if the ADC is unused, otherwise floating analog supply can cause unexpected ADC behavior.
Thông tin tuân thủ
RoHS and lead-free compliant per Microchip product page. Halogen-free status not stated explicitly in the verified data; set to 'unknown'.
