PIC18LF14K22T-I/ML - 8-bit 64MHz XLP MCU 16KB Flash QFN-20 | Microchip
MPN: PIC18LF14K22T-I/ML ✓ Hoạt độngPIC18LF14K22T-I/ML Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and peripheral interfaces into one package. Within the broader hierarchy, the PIC18LF14K22T-I/ML is an 8-bit microcontroller -> microcontroller unit (MCU) -> embedded controller -> semiconductor device. The "LF" prefix denotes the low-voltage variant (1.8-3.6 V), while the "K22" series adds nanoWatt eXtreme Low-Power (XLP) technology with deep-sleep currents below 50 nA, making it a member of Microchip's energy-efficient MCU family.
Key features include a 16 MHz internal oscillator with 4x PLL for 64 MHz operation, 16 KB Flash (8K x 16 words), 512 bytes RAM, 256 bytes EEPROM, a 10-bit ADC with 12 channels, two comparators with selectable on-chip voltage reference, 18 I/O pins, and the standard PIC18 peripheral set (CCP, EUSART, MSSP, CWG). The 20-QFN package (4x4 mm) offers a compact footprint suitable for space-constrained designs.
Architecturally, the device uses Microchip's enhanced PIC18 Harvard RISC core with a 16-bit instruction word and 8-bit data path, executed through a 2-stage pipeline. The XLP nanoWatt technology includes Sleep mode (down to ~20 nA typical), watchdog timer disable in Sleep, ultra-low-power watchdog (~500 nA), and a real-time clock calibration mode. The ADC uses a successive-approximation register (SAR) architecture, and the comparators can source/sink small currents for analog signal conditioning without external op-amps.
Typical applications include battery-powered IoT sensor nodes, low-power remote controls, portable medical devices, energy-harvesting systems, automotive body electronics, USB device peripherals (when paired with PIC18LF13K50), and small home appliances. The combination of high MIPS at low voltage and ultra-low Sleep current makes it suitable for products where battery life is critical.
When designing with the PIC18LF14K22T-I/ML, allocate the QFN thermal pad correctly with a 0.1 mm via array to ground for proper heat spreading, and ensure the analog supply AVSS is tied to digital ground to minimize ADC noise. Programming is supported via MPLAB X IDE, MPLAB XC8 compiler, and the PICkit 5 in-circuit debugger - all covered by Microchip's free tool chain.
This page synthesizes distributor pricing, drop-in same-brand and cross-brand alternatives, and practical design notes that are not found in the manufacturer datasheet itself.
Bộ thay thế dễ dàng lắp đặt cho PIC18LF14K22T-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 PIC18LF14K22T-I/ML (cùng hình factor và footprint) — khác nhau ở Package, ADC, Timers, Operating Temperature, Communication.
PIC18LF14K22-E/ML
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F14K22T-I/ML
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF14K22-I/ML
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF13K22T-I/ML
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F13K22T-I/ML
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18LF14K22T-I/ML Tỷ lệ tối đa & tính chất điện
| Family | PIC18F/LF 14K22 series |
| Core | PIC18 8-bit RISC Harvard |
| CPU Core | PIC18 (8-bit data, 16-bit instruction) |
| Program Memory (Flash) | 16 KB (8K x 16 words) |
| Data RAM | 512 bytes |
| Data EEPROM | 256 bytes |
| Maximum CPU Frequency | 64 MHz |
| MIPS Performance | 16 MIPS |
| Operating Voltage Range | 1.8 V to 3.6 V |
| ADC | 10-bit, 12 channels |
| Comparators | 2 (rail-to-rail, with selectable FVR) |
| I/O Pins | 18 |
| Timers | 3 (8-bit Timer0, 16-bit Timer1, 8-bit Timer2) |
| Capture/Compare/PWM | 1 ECCP + 1 CCP |
| EUSART | Yes (1) |
| MSSP (SPI / I2C) | Yes (1) |
| Internal Oscillator | 16 MHz with 4x PLL (up to 64 MHz) |
| nanoWatt XLP Sleep Current | ~20 nA typical (per datasheet) |
| Hộp | 20-pin QFN (4x4 mm) |
| Nhiệt độ hoạt động | -40 C to +85 C (Industrial, -I suffix) |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
| Lead-Free / Halogen-Free | Yes / Yes |
| Cấp MSL | MSL3 (per QFN package standard) |
Cấu hình chân PIC18LF14K22T-I/ML
| Chân 1 | RA3/AN3/VREF+ — Bidirectional I/O / Analog input 3 / ADC positive reference |
| Chân 2 | RA2/AN2 — Bidirectional I/O / Analog input 2 |
| Chân 3 | RA1/AN1 — Bidirectional I/O / Analog input 1 |
| Chân 4 | RA0/AN0 — Bidirectional I/O / Analog input 0 |
| Chân 5 | RA7/OSC1/CLKIN — Bidirectional I/O / Crystal oscillator input / External clock in |
| Chân 6 | RA6/OSC2/CLKOUT — Bidirectional I/O / Crystal oscillator output / Clock out |
| Chân 7 | RA5/AN4/HLVDIN — Bidirectional I/O / Analog input 4 / High/Low-Voltage Detect input |
| Chân 8 | RA4/T0CKI/SOSCO — Bidirectional I/O / Timer0 clock input / Secondary oscillator output |
| Chân 9 | VSS — Ground reference |
| Chân 10 | VDD — Positive supply voltage (1.8 V to 3.6 V) |
| Chân 11 | RB7/ICSPDAT — Bidirectional I/O / ICSP data |
| Chân 12 | RB6/ICSPCLK — Bidirectional I/O / ICSP clock |
| Chân 13 | RB5 — Bidirectional I/O |
| Chân 14 | RB4 — Bidirectional I/O |
| Chân 15 | RC0/SOSCI/SCLKI — Bidirectional I/O / Secondary oscillator input / SOSC clock in |
| Chân 16 | RC1/CCP2 — Bidirectional I/O / Capture/Compare/PWM 2 |
| Chân 17 | RC2/P1A/ECCP1 — Bidirectional I/O / PWM output A / Enhanced CCP1 |
| Chân 18 | RC3/SDO/SDA — Bidirectional I/O / SPI data out / I2C data |
| Chân 19 | RC4/SDI/SDA — Bidirectional I/O / SPI data in / I2C data |
| Chân 20 | RC5 — Bidirectional I/O |
| Chân EP | EP — Exposed thermal pad - tie to VSS for thermal dissipation (per datasheet) |
Ứng dụng tiêu biểu
PIC18LF14K22T-I/ML phù hợp cho 6 Áp dụngs: Battery-Powered IoT Sensor Node, Low-Power Remote Control, Portable Medical Monitoring Device, Energy-Harvesting Wireless Switch, Small Home Appliance Control Board, Industrial Sensor Hub / Modbus Node.
Battery-Powered IoT Sensor Node
The PIC18LF14K22T-I/ML is a strong fit for battery-powered IoT sensor nodes because of its nanoWatt XLP Sleep current around 20 nA and its 1.8 V to 3.6 V supply range that maps directly onto two AA alkaline cells or a single Li-ion with regulator. With 12 channels of 10-bit ADC and an integrated selectable 1.024 V / 2.048 V / 4.096 V fixed voltage reference, the part can digitize thermistors, photodiodes and gas-sensor analog outputs without a separate analog reference IC. In a typical design, the PIC wakes on RTCC alarm, scans sensors via the ADC, transmits the packet over an attached sub-GHz radio such as the MRF89XA, then returns to Sleep with peripherals off. The 20-QFN 4x4 mm footprint keeps the overall BOM small.
Được đề xuất
Low-Power Remote Control
The PIC18LF14K22T-I/ML fits hand-held remote controls where coin-cell battery life is the primary constraint. Its nanoWatt XLP Sleep current under 20 nA, combined with the PIC18's ability to wake on external interrupt on RB0/INT or any PORTB I/O change, allows the MCU to idle in microamp-range Sleep and only spin the 64 MHz PLL when a button is pressed. The internal 16 MHz oscillator with 4x PLL provides enough MIPS to drive IR protocols or RF encoders without an external crystal. The 20-QFN package keeps the PCB small enough to fit behind a key-fob shell.
Được đề xuất
Portable Medical Monitoring Device
The PIC18LF14K22T-I/ML is suitable for portable medical monitoring peripherals such as pulse oximetry front-ends, handheld thermometers and digital stethoscope interfaces. Its low-voltage 1.8-3.6 V operation allows direct Li-ion battery connection, while the 10-bit ADC and rail-to-rail comparators can read sensor bridges or photodiode amplifiers without external op-amps. The XLP Sleep current is critical because medical wearables spend >99% of their time idle waiting for a measurement trigger. The compact 20-QFN package supports miniaturized form factors and the industrial -40 C to +85 C temperature range covers body-worn operating conditions.
Được đề xuất
Energy-Harvesting Wireless Switch
The PIC18LF14K22T-I/ML is a strong match for energy-harvesting wireless switches, such as EnOcean-compatible self-powered light switches or BLE beacons powered by indoor photovoltaic cells. The part wakes from Sleep in microseconds and can complete a transmit cycle within a few hundred microseconds, well within the energy budget of a typical 100 uF storage cap charged from a kinetic or solar transducer. The internal comparator can monitor the storage cap voltage to gate transmission, while the EUSART or MSSP links to a companion radio such as the RN4870 BLE module.
Được đề xuất
Small Home Appliance Control Board
The PIC18LF14K22T-I/ML is well-suited as the main controller in small home appliances such as coffee machines, induction cooktops, humidifiers and air-quality monitors. Its 16 MIPS performance handles PWM-controlled heaters, fans and pumps using the ECCP module, while the integrated rail-to-rail comparators can monitor zero-cross detection or over-current signals directly from the AC mains bridge. The 12-channel 10-bit ADC is enough to read multiple temperature sensors, water levels, and user-interface potentiometers. The QFN-20 footprint is small enough to fit a compact control PCB alongside an AC/DC module.
Được đề xuất
Industrial Sensor Hub / Modbus Node
The PIC18LF14K22T-I/ML is appropriate for industrial sensor hubs and Modbus RTU slave nodes where low power, small footprint and robust peripherals matter. The EUSART supports RS-485 half-duplex communication at up to 1 Mbps using an external transceiver such as the MAX485, while the 10-bit ADC with 12 channels covers multiple analog process inputs. The 16 MIPS performance comfortably runs Modbus RTU or simple CAN-like protocols. The -I industrial temperature grade covers factory-floor environments from -40 C to +85 C.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18LF14K22T-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 | PIC18LF14K22-E/ML | PIC18F14K22T-I/ML | PIC18LF14K22-I/ML | PIC18LF13K22T-I/ML |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-QFN (4x4 mm) | 20-QFN (4x4 mm) - same | 20-QFN (4x4 mm) - same | 20-QFN (4x4 mm) - same | 20-QFN (4x4 mm) - same |
| Operating Voltage | 1.8 V to 3.6 V (LF) | 1.8 V to 3.6 V (LF) | 1.8 V to 5.5 V (F) | 1.8 V to 3.6 V (LF) | 1.8 V to 3.6 V (LF) |
| Flash Memory | 16 KB | 16 KB | 16 KB | 16 KB | 8 KB |
| RAM | 512 bytes | 512 bytes | 512 bytes | 512 bytes | 256 bytes |
| EEPROM | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes |
| Max CPU Frequency | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +125 C (Extended) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) |
| ADC Channels x Resolution | 12 x 10-bit | 12 x 10-bit | 12 x 10-bit | 12 x 10-bit | 11 x 10-bit |
| Packaging | Tape & Reel | Tape & Reel | Tape & Reel | Tray | Tape & Reel |
Bảo phân biệt quan trọng
- nanoWatt XLP Sleep current below 20 nA (vsPIC18F14K22T-I/ML)
- Lowest-voltage operation (1.8 V to 3.6 V) (vsPIC18F14K22T-I/ML)
- Industrial temperature grade -I matched to consumer/IoT use cases (vsPIC18LF14K22-E/ML)
Ghi chú thiết kế
The 20-pin QFN package has an exposed thermal pad (EP) on the underside that MUST be soldered to a PCB pad for both thermal dissipation and mechanical reliability. Drill an array of 0.3 mm thermal vias (typically 9-12 vias on a 1.0 mm pitch) under the EP and tie them to the VSS plane. Without proper EP soldering, the device's thermal resistance rises sharply and reflow reliability drops, especially under thermal-cycling stress.
Estimated: at 64 MHz active and 3.3 V VDD, the PIC18LF14K22T-I/ML typically draws ~5-8 mA active, but in Sleep with peripherals off it falls to ~20 nA. For coin-cell designs, ensure the average current budget accounts for <1% active duty cycle - the nanoWatt XLP modes (Sleep, Deep Sleep, and RTCC with external 32.768 kHz crystal) are essential to hit multi-year battery life. Decouple VDD with 100 nF ceramic close to the pin and a bulk 1-10 uF cap on the supply rail.
When migrating from the PIC18F14K22 (F variant, 1.8-5.5 V) to the PIC18LF14K22T-I/ML (LF variant, 1.8-3.6 V), do NOT apply 5 V to VDD - this will damage it. Also, the PIC18LF14K22T-I/ML ADC is optimized for 3.3 V operation; for 5 V analog signals, use the F variant or add an external resistor divider. The PLL has minimum VDD requirements and may not lock reliably below 2.0 V - check datasheet parameter D016 (PLL lock threshold) before relying on 64 MHz operation at low voltages.
The PIC18LF14K22T-I/ML ADC accuracy depends heavily on clean analog and digital supplies. Place a ferrite bead or small RC filter between VDD and AVSS-equivalent routing (VSS pin 9) to prevent digital switching noise from coupling into the ADC reference. For high-impedance analog sources, add an op-amp buffer or sample-and-hold capacitor; the 10-bit ADC with 4.096 V FVR has an LSB of 4 mV and source impedance above 10 kohm will degrade conversion accuracy.
Thông tin tuân thủ
RoHS and REACH compliance per Microchip product page. Not AEC-Q100 qualified - choose PIC18F14K22-I/ML automotive variant for AEC-Q100 Grade 1, or use external regulator E-only reference. Lead-free (Pb-free) reflow-compatible per JEDEC J-STD-020.
