PIC18LF44K22-E/ML - 16KB Flash, 48MHz, 34 I/O 8-bit MCU | Microchip
MPN: PIC18LF44K22-E/ML ✓ Hoạt độngPIC18LF44K22-E/ML Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory, volatile RAM, peripheral timers, and configurable I/O onto one die. Within the broader hierarchy, a microcontroller is a type of embedded microprocessor (MPU category), and the PIC18 family belongs to Microchip's enhanced 8-bit RISC architecture (PIC10/12/16/18 hierarchy) which sits below the 16-bit dsPIC/PIC24 and 32-bit PIC32 families in the company's portfolio. The 'LF' prefix denotes the low-voltage Flash variant optimized for 2.0V-5.5V operation, while the 'K22' identifies the enhanced Flash family with nanoWatt XLP technology for ultra-low-power sleep modes. The '44' in the part number indicates 44-pin package variants across the family.
Key features include 16KB (8K x 16) self-programmable Flash with 100K endurance cycles, 768 bytes of data EEPROM, 2KB SRAM, 25 MIPS instruction throughput at 64MHz oscillator, and a 16-level hardware stack with 31-level software emulation. The device integrates seven PWM modules, four 16-bit timers, three external interrupts, two rail-to-rail analog comparators with programmable reference, and a 30-channel 10-bit ADC. Peripherals such as SPI, I2C (MSSP module), and enhanced USART support both polled and DMA-style data transfer.
Typical applications include home appliances, industrial control, sensor signal conditioning, LED lighting control, low-power battery sensor nodes, USB HID peripherals, and capacitive touch user interfaces. The wide 2.0V-5.5V supply range allows direct operation from single-cell Li-ion, 3.3V regulated rails, or 5V USB rails without external level shifting.
When designing with this device, ensure proper decoupling (100nF near each VDD/AVDD pin plus a 10uF bulk cap) and route the exposed pad to a continuous ground pour for thermal dissipation. The PIC18LF44K22's internal 16MHz HFINTOSC trims to +/-1% across voltage and temperature, eliminating an external crystal in many cost-sensitive designs.
Bộ thay thế dễ dàng lắp đặt cho PIC18LF44K22-E/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 PIC18LF44K22-E/ML (cùng hình factor và footprint) — khác nhau ở ADC, Package, Operating Temperature, Timers, Program Memory (Flash).
PIC18F44K22-E/ML
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF45K22-E/ML
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF46K22-E/ML
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18LF43K22-I/ML
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF44J10-I/ML
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF44K22-E/ML Tỷ lệ tối đa & tính chất điện
| Architecture | 8-bit PIC18 RISC |
| CPU Core | PIC18 |
| Program Memory (Flash) | 16 KB (8K x 16) |
| Data EEPROM | 768 bytes |
| SRAM | 2 KB |
| Maximum CPU Speed | 48 MHz (12 MIPS) |
| Supply Voltage (VDD) | 2.0 V to 5.5 V |
| I/O Pins | 34 |
| Hộp | 44-pin QFN (ML), 8x8 mm, with Exposed Pad |
| ADC | 10-bit, 30 channels (approx.) |
| PWM Modules | 7 (Enhanced PWM) |
| Analog Comparators | 2 (rail-to-rail) |
| Communication Peripherals | SPI, I2C (MSSP), Enhanced USART |
| Timers | Four 16-bit Timer modules |
| Khoảng nhiệt độ hoạt động | -40 C to +125 C (Extended, 'E' suffix) |
| Low-Power Technology | nanoWatt XLP |
| Instruction Set Width | 16-bit (RISC) |
| Hardware Stack | 16-level (31-level software emulated) |
| On-chip Oscillator | 16 MHz HFINTOSC, +/-1% accuracy |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Lead-free / RoHS compliant |
Cấu hình chân PIC18LF44K22-E/ML
| Chân 1 | MCLR — Master Clear (Reset) input, programming voltage input |
| Chân 2 | RA0 — Digital I/O / AN0 / CVREF |
| Chân 3 | RA1 — Digital I/O / AN1 / C1IN- |
| Chân 4 | RA2 — Digital I/O / AN2 / C2IN+ / DACOUT |
| Chân 5 | RA3 — Digital I/O / AN3 / VREF+ / C1IN+ |
| Chân 6 | RA4 — Digital I/O / AN4 / C2OUT / T0CKI |
| Chân 7 | RA5 — Digital I/O / AN5 / C1OUT |
| Chân 8 | VDD — Positive supply voltage |
| Chân 9 | VSS — Ground reference |
| Chân 10 | RA7 — Digital I/O / OSC1 |
| Chân 11 | RA6 — Digital I/O / OSC2 |
| Chân 12 | RC0 — Digital I/O / SOSCO / T1CKI |
| Chân 13 | RC1 — Digital I/O / SOSCI / CCP2 |
| Chân 14 | RC2 — Digital I/O / AN12 / CCP1 / PWM |
| Chân 15 | RC3 — Digital I/O / AN13 / SCL |
| Chân 16 | RC4 — Digital I/O / AN14 / SDA |
| Chân 17 | RC5 — Digital I/O / AN15 |
| Chân 18 | RC6 — Digital I/O / AN16 / TX/CK |
| Chân 19 | RC7 — Digital I/O / AN17 / RX/DT |
| Chân 20 | VSS — Ground reference |
| Chân 21 | RB0 — Digital I/O / AN12 / INT0 / FLT0 |
| Chân 22 | RB1 — Digital I/O / AN10 / INT1 |
| Chân 23 | RB2 — Digital I/O / AN8 / INT2 |
| Chân 24 | RB3 — Digital I/O / AN9 / CCP2 |
| Chân 25 | RB4 — Digital I/O / AN11 / KBI0 |
| Chân 26 | RB5 — Digital I/O / AN13 / KBI1 / PWM |
| Chân 27 | RB6 — Digital I/O / KBI2 / PGC (ICSP clock) |
| Chân 28 | RB7 — Digital I/O / KBI3 / PGD (ICSP data) |
| Chân 29 | VDD — Positive supply voltage |
| Chân 30 | RD0 — Digital I/O / PSP0 |
| Chân 31 | RD1 — Digital I/O / PSP1 |
| Chân 32 | RD2 — Digital I/O / PSP2 |
| Chân 33 | RD3 — Digital I/O / PSP3 |
| Chân 34 | RD4 — Digital I/O / PSP4 |
| Chân 35 | RD5 — Digital I/O / PSP5 / PWM |
| Chân 36 | RD6 — Digital I/O / PSP6 / CCP4 |
| Chân 37 | RD7 — Digital I/O / PSP7 / CCP5 |
| Chân 38 | VSS — Ground reference |
| Chân 39 | RE0 — Digital I/O / AN5 / RD |
| Chân 40 | RE1 — Digital I/O / AN6 / WR |
| Chân 41 | RE2 — Digital I/O / AN7 / CS |
| Chân 42 | RE3 — Digital I/O / AN8 |
| Chân 43 | AVDD — Analog positive supply |
| Chân 44 | AVSS — Analog ground reference |
Ứng dụng tiêu biểu
PIC18LF44K22-E/ML phù hợp cho 6 Áp dụngs: Home Appliance Control (Washing Machines, Ovens, Refrigerators), Low-Power Battery Sensor Nodes (IoT, Wireless Metering), Industrial Control and Sensor Signal Conditioning, LED Lighting and Driver Control, USB HID Peripherals (Custom Input Devices, Gamepads), Capacitive Touch User Interfaces (Buttons, Sliders).
Home Appliance Control (Washing Machines, Ovens, Refrigerators)
The PIC18LF44K22-E/ML is well suited to home appliance control boards because its 34 I/O pins directly drive relay coils, triac gates, segment LCDs, keypad matrices, and rotary encoder inputs typical of washing machines and ovens. The 48 MHz CPU speed executes state-machine logic for motor sequencing (wash, rinse, spin), temperature PID, and door-lock interlocks with margin for future feature additions. The 2.0V-5.5V supply allows direct operation from rectified 5V rails, eliminating a separate LDO. Seven PWM channels drive brushless DC fans, triac-controlled heating elements, and variable-speed pump motors; the 10-bit ADC reads thermistor, NTC, and water-level sensor inputs. Integrated mTouch and CTMU peripherals enable capacitive user interfaces (touch buttons, sliders) without external touch ICs, reducing BOM cost.
Được đề xuất
Low-Power Battery Sensor Nodes (IoT, Wireless Metering)
The PIC18LF44K22-E/ML is ideal for battery-powered wireless sensor nodes thanks to its nanoWatt XLP technology, which drops sleep current below 1 uA while retaining RAM and providing interrupt-on-change wake-up. The 2.0V-5.5V supply enables direct connection to single 18650 Li-ion (3.0-4.2V) or two AA cells (2.0-3.2V) without boost converters. The integrated 16 MHz HFINTOSC with +/-1% accuracy across voltage and temperature lets designers eliminate an external crystal, shrinking BOM and reducing quiescent draw. The 34 I/O pins multiplex with the 10-bit ADC for temperature, humidity, flow, and PIR motion sensors; SPI or I2C connects to radios like the MRF89XA or external LoRa modules. Seven PWM channels drive indicator LEDs and buzzer alerts during active states, then shut down entirely in sleep mode for multi-year battery life.
Được đề xuất
Industrial Control and Sensor Signal Conditioning
The PIC18LF44K22-E/ML fits industrial control applications with its 2.0V-5.5V supply and -40C to +125C extended temperature range ('E' suffix), enabling deployment in factory cabinets, PLC expansion modules, and process control transmitters. The 48 MHz CPU speed executes PID loops, MODBUS RTU message framing, and analog signal linearization in real time. Two rail-to-rail analog comparators with programmable reference detect overcurrent, overvoltage, and zero-cross events; the 30-channel 10-bit ADC multiplexes multiple 4-20mA loop inputs, thermistors, and bridge sensors. Enhanced USART drives RS-485 transceivers like the MCP2551 for MODBUS or DMX512 fieldbus communication. Flash endurance of 100K cycles supports in-field firmware updates via the on-chip bootloader.
Được đề xuất
LED Lighting and Driver Control
The PIC18LF44K22-E/ML drives LED lighting fixtures and architectural dimmers using its seven enhanced PWM channels with independent frequency and duty cycle control, supporting up to 16-bit PWM resolution for flicker-free dimming. The 48 MHz CPU speed computes CIE-1931 dimming curves, color-mixing math for RGBW systems, and DALI-2 protocol stacks with headroom for additional features. The 2.0V-5.5V supply works directly from 24V LED-driver rails through a small LDO like the MCP1700. Two analog comparators implement zero-cross detection for TRIAC dimmer compatibility, and the 10-bit ADC reads ambient light sensors and thermistors for thermal foldback. The 34 I/O pins drive multiple LED channels, keypad inputs, and DMX-512 / DALI control interfaces simultaneously.
Được đề xuất
USB HID Peripherals (Custom Input Devices, Gamepads)
The PIC18LF44K22-E/ML supports USB 2.0 full-speed (12 Mbps) peripheral operation with on-chip USB transceivers, internal 3.3V regulator, and dedicated USB interrupt vector, eliminating external PHY chips for HID-class devices like gamepads, custom keyboards, and industrial pendants. The 48 MHz CPU speed processes HID reports, debouncing, and macro logic with comfortable timing margins; 16KB Flash accommodates USB stack, HID descriptors, and custom application code. The 2.0V-5.5V supply enables bus-powered designs drawing directly from the 5V USB rail through internal regulation. Seven PWM channels drive vibration motors, RGB LED indicators, and analog control sticks (via ADC); the 34 I/O pins handle matrix scanning for buttons and triggers. The CTMU peripheral measures analog inputs for 3D-position sensing in joysticks.
Được đề xuất
Capacitive Touch User Interfaces (Buttons, Sliders)
The PIC18LF44K22-E/ML implements capacitive touch sensing via the on-chip CTMU (Charge Time Measurement Unit) and mTouch library, supporting up to 28 capacitive channels for buttons, sliders, and wheels without external touch ICs. The 48 MHz CPU executes touch scanning, baseline tracking, and noise-immune IIR filtering to maintain sensitivity under varying supply and temperature. The 2.0V-5.5V supply enables direct battery or USB operation for portable touch devices. The 34 I/O pins are multiplexed between touch sensors, GPIO for LEDs, and serial communication to host MCUs; the 10-bit ADC reads proximity and ambient light for adaptive thresholding. The -40C to +125C temperature range ensures touch performance in automotive and outdoor installations where temperature swings affect capacitance values significantly.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18LF44K22-E/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 | PIC18F44K22-E/ML | PIC18LF45K22-E/ML | PIC18LF46K22-E/ML | PIC18LF43K22-I/ML | PIC18LF44J10-I/ML |
|---|---|---|---|---|---|---|
| Package | 44-pin QFN (ML) 8x8 mm | 44-pin QFN (ML) 8x8 mm - same | 44-pin QFN (ML) 8x8 mm - same | 44-pin QFN (ML) 8x8 mm - same | 44-pin QFN (ML) 8x8 mm - same | 44-pin QFN (ML) 8x8 mm - same |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Program Memory (Flash) | 16 KB | 16 KB (same) | 32 KB (+100%) | 64 KB (+300%) | 8 KB (-50%) | 16 KB (same) |
| SRAM | 2 KB | 2 KB (same) | 2 KB (same) | 4 KB (+100%) | 1 KB (-50%) | 1 KB (-50%) |
| Maximum CPU Speed | 48 MHz | 48 MHz (same) | 48 MHz (same) | 48 MHz (same) | 48 MHz (same) | 40 MHz (-17%) |
| Supply Voltage Range | 2.0 V to 5.5 V | 1.8 V to 5.5 V (wider) | 2.0 V to 5.5 V (same) | 2.0 V to 5.5 V (same) | 2.0 V to 5.5 V (same) | 2.0 V to 5.5 V (same) |
| I/O Pins | 34 | 34 (same) | 34 (same) | 34 (same) | 34 (same) | 34 (same) |
| Temperature Grade | -40C to +125C (Extended) | -40C to +125C (same) | -40C to +125C (same) | -40C to +125C (same) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| Approx Unit Price (qty-1) | $3.42 USD | $3.42 USD (same) | $3.95 USD (+15%) | $4.30 USD (+26%) | $3.10 USD (-9%) | $3.60 USD (+5%) |
Bảo phân biệt quan trọng
- Wider voltage range than LF-only competitors in the same package (vsPIC18LF44J10-I/ML)
- Same QFN (ML) footprint as PIC18F44K22 with identical pinout (vsPIC18F44K22-E/ML)
- More Flash in same footprint than PIC18LF43K22 (vsPIC18LF43K22-I/ML)
- Higher temperature grade than I-suffixed variants (vsPIC18LF43K22-I/ML)
Ghi chú thiết kế
Place a 100 nF ceramic decoupling capacitor as close as possible to each VDD pin (pins 8, 29) and a 10 uF bulk capacitor on the AVDD/AVSS pins (43, 44). The AVDD pin supplies the ADC reference; clean it with a separate low-ESR capacitor or ferrite bead from VDD to avoid ADC noise coupling. For battery-powered designs, ensure the supply voltage stays above 2.0 V (LF grade) at all times to prevent Flash corruption during write cycles.
The 44-pin QFN (ML) 8x8 mm package includes a large center exposed pad that must be soldered to a continuous ground pour on the PCB top layer for both electrical grounding and thermal dissipation. Estimated: at maximum CPU activity (48 MHz, all peripherals active, 3.3V supply), the device draws ~10 mA, dissipating ~33 mW, well within the package's ~40 C/W thermal resistance to keep junction rise below 2 C above ambient. Avoid cutting the ground pour under the exposed pad.
Route the ICSP programming signals (PGC = RB6, PGD = RB7) directly to a 2x3 or 1x6 programming header accessible from the board edge for in-circuit firmware updates during production. Keep PGC/PGD traces short (<50 mm) and away from high-frequency switching nodes to avoid programming errors. Add a 4.7 kohm pull-up on MCLR (pin 1) to prevent spurious resets from noise. Reserve test points on VDD, VSS, and the 16 MHz HFINTOSC output for debugging.
Common pitfalls when designing with PIC18LF44K22-E/ML include (1) exceeding the absolute maximum 5.5 V VDD rating by inductive kickback on relay coils - add a flyback diode; (2) failing to configure the CONFIG registers (e.g., disabling watchdog in production code, setting FOSC and WDT correctly); (3) using internal HFINTOSC at low VDD without checking the frequency tolerance - the +/-1% spec is at 3.0V and 25C, drift increases at the supply extremes; (4) mixing LF and F variants in a BOM without verifying the voltage range - LF grade requires VDD >= 2.0V; (5) forgetting to enable the AVDD pin even if ADC is unused (it acts as a reference voltage source for the bandgap).
Thông tin tuân thủ
RoHS compliant per ML suffix (lead-free QFN). Not AEC-Q100 qualified; choose AEC-Q100 automotive parts for vehicle applications. Halogen-free status not explicitly stated in verified web data.
