PIC18LF44K22-I/ML - 8-bit 16KB Flash MCU, nanoWatt XLP, 44-QFN | Microchip
Référence : PIC18LF44K22-I/ML ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $3.42 | $3,42 |
| 10 | $3.07 | $30,70 |
| 100 | $2.65 | $265,00 |
| 500 | $2.31 | $1 155,00 |
| 1 000 | $2.04 | $2 040,00 |
PIC18LF44K22-I/ML Présentation
An 8-bit microcontroller (MCU) is a programmable processor that executes instructions on an 8-bit data bus. It sits within the broader taxonomy of microcontrollers -> microprocessors -> semiconductor devices -> integrated circuits. The PIC18 family is Microchip's high-performance 8-bit line featuring a RISC-based Harvard architecture, hardware multiplier, and C-optimized instruction set, sitting architecturally between the baseline PIC10/12/16 families and the 16-bit dsPIC/PIC24 families.
Key features include up to 16 MIPS performance at 64 MHz internal oscillator, 30 source/sink I/O capable of 25 mA per pin, two Enhanced USART modules, two MSSP (SPI/I2C) modules, two 10-bit ADC converters with up to 28 channels, two analog comparators with rail-to-rail inputs, a 5-bit DAC, three 8/16-bit timer/counters, a 16-bit capture/compare/PWM module, and CTMU for capacitive touch sensing. The XLP nanoWatt technology delivers sub-microamp sleep currents with retention.
Typical applications include compact handheld design (portable consumer, IoT sensor nodes), industrial control (sensor hubs, simple motor control, lighting controllers), medical devices (compact patient monitoring, point-of-care instruments), and consumer electronics (small appliance controllers, smart-home bridges, battery-powered toys). The integrated peripherals enable single-chip designs that previously required external ADC, EEPROM, and driver ICs.
When designing with this device, ensure the QFN-44 thermal pad is soldered to a sufficient copper pour to dissipate power and provide mechanical robustness. Decouple VDD with a 100 nF ceramic capacitor close to each pin pair, and add a bulk 1 uF to 10 uF capacitor on the main rail. Always configure unused pins as outputs to minimize sleep current.
Alternatives de remplacement direct pour PIC18LF44K22-I/ML — 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 PIC18LF44K22-I/ML (même facteur de forme et même empreinte) — différant par Package, Timers, ADC, Program Memory (Flash), Core Architecture.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
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Voir la fiche technique →PIC18LF44K22-E/ML
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Voir la fiche technique →PIC18LF44K22-I/ML Valeurs maximales et caractéristiques électriques
| Core Architecture | 8-bit PIC18 (Harvard RISC) |
| Program Memory (Flash) | 16 KB |
| SRAM | 768 bytes |
| EEPROM | 256 bytes |
| Maximum CPU Speed | 64 MHz (16 MIPS) |
| Operating Voltage Range | 1.8 V to 3.6 V (LF variant) |
| I/O Pins | 30 (source/sink 25 mA) |
| Boîtier | 44-pin QFN (ML) 8x8 mm |
| ADC | 2x 10-bit, up to 28 channels |
| Comparators | 2 (rail-to-rail input) |
| DAC | 5-bit |
| UART/USART | 2x Enhanced USART |
| SPI/I2C (MSSP) | 2x MSSP |
| Timers | 3x (8-bit or 16-bit configurable) |
| Capture/Compare/PWM | 1x 16-bit ECCP |
| Low-Power Technology | nanoWatt eXtreme Low Power (XLP) |
| Température de fonctionnement | -40C to +85C (Industrial -I) |
| Type de montage | Surface Mount |
| Statut RoHS | Compliant |
Configuration des broches de PIC18LF44K22-I/ML
| Broche 1 | RA2 — Port A bit 2 (digital I/O or analog) |
| Broche 2 | RA3 — Port A bit 3 (digital I/O or analog) |
| Broche 3 | RA4 — Port A bit 4 (digital I/O or analog) |
| Broche 4 | RA5 — Port A bit 5 (digital I/O or analog) |
| Broche 5 | RA6 — Port A bit 6 (digital I/O or analog) |
| Broche 6 | RA7 — Port A bit 7 (digital I/O or analog) |
| Broche 7 | VSS — Ground reference |
| Broche 8 | VDD — Positive supply voltage (1.8V to 3.6V) |
| Broche 9 | RA0 — Port A bit 0 (digital I/O or analog) |
| Broche 10 | RA1 — Port A bit 1 (digital I/O or analog) |
| Broche 11 | RB0 — Port B bit 0 (interrupt-on-change capable) |
| Broche 12 | RB1 — Port B bit 1 (interrupt-on-change capable) |
| Broche 13 | RB2 — Port B bit 2 (interrupt-on-change capable) |
| Broche 14 | RB3 — Port B bit 3 (interrupt-on-change capable) |
| Broche 15 | RB4 — Port B bit 4 (interrupt-on-change capable) |
| Broche 16 | RB5 — Port B bit 5 (interrupt-on-change capable) |
| Broche 17 | RB6 — Port B bit 6 (ICSP PGC / interrupt-on-change) |
| Broche 18 | RB7 — Port B bit 7 (ICSP PGD / interrupt-on-change) |
| Broche 19 | VSS — Ground reference |
| Broche 20 | VDD — Positive supply voltage (1.8V to 3.6V) |
| Broche 21 | RC0 — Port C bit 0 (digital I/O or analog) |
| Broche 22 | RC1 — Port C bit 1 (digital I/O or analog) |
| Broche 23 | RC2 — Port C bit 2 (digital I/O or analog) |
| Broche 24 | RC3 — Port C bit 3 (digital I/O or analog) |
| Broche 25 | RC4 — Port C bit 4 (digital I/O or analog) |
| Broche 26 | RC5 — Port C bit 5 (digital I/O or analog) |
| Broche 27 | RC6 — Port C bit 6 (TX/USART) |
| Broche 28 | RC7 — Port C bit 7 (RX/USART) |
| Broche 29 | RD0 — Port D bit 0 (digital I/O or analog) |
| Broche 30 | RD1 — Port D bit 1 (digital I/O or analog) |
| Broche 31 | RD2 — Port D bit 2 (digital I/O or analog) |
| Broche 32 | RD3 — Port D bit 3 (digital I/O or analog) |
| Broche 33 | RD4 — Port D bit 4 (digital I/O or analog) |
| Broche 34 | RD5 — Port D bit 5 (digital I/O or analog) |
| Broche 35 | RD6 — Port D bit 6 (digital I/O or analog) |
| Broche 36 | RD7 — Port D bit 7 (digital I/O or analog) |
| Broche 37 | VSS — Ground reference |
| Broche 38 | VDD — Positive supply voltage (1.8V to 3.6V) |
| Broche 39 | RE0 — Port E bit 0 (digital I/O or analog) |
| Broche 40 | RE1 — Port E bit 1 (digital I/O or analog) |
| Broche 41 | RE2 — Port E bit 2 (digital I/O or analog) |
| Broche 42 | RE3 — Port E bit 3 (digital I/O or analog, MCLR alternate) |
| Broche 43 | VDDCORE — Digital core voltage decoupling |
| Broche 44 | ENVREG — Voltage regulator enable for digital core |
| Broche EP | Exposed Pad — Thermal pad (must be soldered to PCB ground plane) |
Applications typiques
PIC18LF44K22-I/ML convient pour 7 applications: Battery-Powered IoT Sensor Node, Industrial Control & HMI, Portable Medical Devices, Consumer Appliance Controllers, Automotive Body Electronics (Non-Safety), Smart Home Sensor Hub, Capacitive Touch User Interface.
Battery-Powered IoT Sensor Node
The PIC18LF44K22-I/ML is ideal for battery-powered IoT sensor nodes thanks to its nanoWatt eXtreme Low Power (XLP) technology with sub-microamp Sleep currents as low as 20 nA and Watchdog Timer current around 300 nA. The 1.8V to 3.6V operating range is compatible with single-cell Li-Ion or two-AA alkaline batteries. The 2x 10-bit ADC with up to 28 channels can directly interface with temperature, humidity, and analog sensor outputs, while the integrated comparators enable threshold-based wake-up events. With 16 KB Flash and 768 bytes RAM, the part runs sensor sampling loops and lightweight protocol stacks (e.g., Modbus RTU or proprietary RF telemetry). Placed on a compact PCB with the QFN-44 (ML) 8x8 mm footprint, it enables small-form-factor sensor products.
Recommandé
Industrial Control & HMI
In industrial control and HMI applications, the PIC18LF44K22-I/ML provides 30 I/O pins capable of 25 mA source/sink current, allowing direct drive of relays, LEDs, and small displays without external driver ICs. The 16-bit ECCP module supports precision PWM for motor control and dimming, while 2x Enhanced USART enables RS-485 communication with industrial sensor networks. The 10-bit ADC with 28 channels handles multiple analog inputs from pressure, flow, and temperature transducers. The CTMU peripheral supports capacitive touch keys for HMI panels. Operating from -40C to +85C, the part is rated for industrial environments. The 44-QFN (ML) package with exposed pad provides thermal stability for continuous-operation designs.
Recommandé
Portable Medical Devices
For portable medical devices such as handheld pulse oximeters, glucometers, and patient thermometers, the PIC18LF44K22-I/ML offers low-voltage operation from 1.8V to 3.6V suitable for 2xAA or rechargeable Li-Ion cells. The XLP nanoWatt Sleep mode with sub-microamp current extends battery life to support multi-month usage without recharge. The 2x analog comparators with rail-to-rail inputs enable low-side battery voltage monitoring and signal conditioning for photodiode or thermistor sensor front-ends. The 5-bit DAC provides bias voltages for sensor excitation. With industrial -40C to +85C operating range, the part meets typical home and clinical environment requirements. The QFN-44 footprint supports compact medical device enclosures.
Recommandé
Consumer Appliance Controllers
The PIC18LF44K22-I/ML fits small consumer appliances such as coffee makers, air purifiers, blenders, and smart-home control panels where 30 I/O pins and rich peripherals replace multiple discrete components. The 16-bit ECCP delivers precise PWM for motor speed control and LED brightness, while 2x MSSP (SPI/I2C) supports digital sensors and EEPROM expansion. The integrated 5-bit DAC and 2x analog comparators support simple audio chirp generation and threshold detection. With 16 KB Flash, the part runs UI logic, scheduling, and simple BLE/Mesh interface via external transceiver. The QFN-44 8x8 mm package fits within compact appliance enclosures. Operating from -40C to +85C covers typical home and kitchen environments.
Recommandé
Automotive Body Electronics (Non-Safety)
For non-safety automotive body electronics such as interior lighting controllers, seat adjustment switches, mirror controllers, and HVAC auxiliaries, the PIC18LF44K22-I/ML provides 30 I/O pins that can directly drive low-current loads and interface with LIN or CAN PHY transceivers via 2x Enhanced USART. The 16 MIPS performance supports real-time seat position memory and lighting fade algorithms. The 16-bit ECCP provides precise PWM for motor speed control in HVAC blowers. The -40C to +85C industrial temperature rating covers cabin environments, though for under-hood or safety-critical systems the PIC18F or dsPIC automotive AEC-Q100 grades are required. The 44-QFN package supports compact ECU designs.
Recommandé
Smart Home Sensor Hub
In smart-home sensor hub applications such as multi-zone security panels, environmental monitors, and lighting controllers, the PIC18LF44K22-I/ML aggregates signals from multiple analog and digital sensors. The 2x 10-bit ADC with up to 28 channels reads numerous analog sensors simultaneously, while 2x MSSP (SPI/I2C) interfaces with digital temperature, humidity, and air-quality sensors. The 2x Enhanced USART enables communication with wireless modules (Sub-GHz, BLE, LoRa) for cloud connectivity. The CTMU peripheral supports capacitive touch keys for user input. The XLP nanoWatt Sleep with RTC keeps the hub alive on backup battery during power outages, drawing less than 1 uA in Sleep. The 44-QFN package fits into wall-mount and tabletop enclosures.
Recommandé
Capacitive Touch User Interface
For capacitive touch user interface panels in appliances, access control keypads, and consumer electronics, the PIC18LF44K22-I/ML leverages its integrated CTMU (Charge Time Measurement Unit) and 2x analog comparators to implement up to 30 touch channels without external touch ICs. The CTMU provides precise time-domain charge measurements for differentiating touched from untouched pads, supporting both buttons and sliders. The 16 MIPS performance runs touch scanning, debounce, and gesture recognition in real time. Low-power Sleep with sub-microamp current allows battery-powered remote controls and wireless switches to wake on touch. The 44-QFN package fits behind thin overlay panels. Operating from 1.8V to 3.6V supports direct Li-Ion battery operation.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PIC18LF44K22-I/ML — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | PIC18F44K22-I/ML | PIC18LF45K22-I/ML | PIC18LF43K22-I/ML | PIC18LF46K22-I/ML | PIC18F45K22-I/ML |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| 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 |
| Program Memory (Flash) | 16 KB | 16 KB (same) | 32 KB (+100%) | 8 KB (-50%) | 64 KB (+300%) | 32 KB (+100%) |
| SRAM | 768 bytes | 768 bytes (same) | 1.5 KB (+96%) | 512 B (-33%) | 3.8 KB (+395%) | 1.5 KB (+96%) |
| Operating Voltage Range | 1.8 V to 3.6 V (LF) | 1.8 V to 5.5 V (F) - wider | 1.8 V to 3.6 V (LF) - same | 1.8 V to 3.6 V (LF) - same | 1.8 V to 3.6 V (LF) - same | 1.8 V to 5.5 V (F) - wider |
| CPU Speed | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS - same | 64 MHz / 16 MIPS - same | 64 MHz / 16 MIPS - same | 64 MHz / 16 MIPS - same | 64 MHz / 16 MIPS - same |
| I/O Pins | 30 | 30 (same) | 30 (same) | 25 (-17%) | 30 (same) | 30 (same) |
| Temperature Grade | -40C to +85C (Industrial) | -40C to +85C (same) | -40C to +85C (same) | -40C to +85C (same) | -40C to +85C (same) | -40C to +85C (same) |
Principaux différenciateurs
- LF variant for low-voltage battery applications (vs PIC18F44K22-I/ML)
- 16 KB Flash is the sweet spot for cost-performance (vs PIC18LF45K22-I/ML)
- Industry-standard 44-QFN package with industrial temperature grade (vs PIC18LF44K22-E/ML)
- Integrated CTMU for capacitive touch without external IC (vs PIC18F46K22-I/ML)
Notes de conception
Solder the QFN-44 exposed pad (EP) directly to a PCB ground plane with multiple thermal vias for heat dissipation. QFN packages depend on this pad for both electrical grounding and mechanical robustness. Place a 100 nF decoupling capacitor on each VDD/VSS pair (pins 8/7, 20/19, 38/37) within 2 mm of the package, plus a bulk 1 uF to 10 uF capacitor on the main supply trace. Keep the QFN land pattern exactly per Microchip package specification for reliable solder joint formation and to avoid voids.
Unused pins must be explicitly configured as outputs and tied low (or high for inputs with pull-ups) in firmware to minimize Sleep current. Floating unused pins can draw microamps per pin and ruin low-power battery life. For the PIC18LF44K22-I/ML, ensure the Watchdog Timer is disabled when not used, and configure unused analog channels as digital to prevent ADC bias current. The MCLR pin (RE3) requires proper pull-up configuration per the datasheet to avoid unintended resets.
Route the ICSP programming pins (PGD = RB7, PGC = RB6) with short, parallel traces and a solid ground return for reliable in-circuit programming. Place a 4.7 kohm pull-up on MCLR and consider an in-line resistor for isolation between the programmer and the application circuit. For the analog ADC inputs, isolate digital switching traces and place a ground pour around sensitive analog sections to minimize crosstalk. The 10-bit ADC accuracy depends on clean VDD - use a ferrite bead and capacitor pi-filter if digital and analog supplies share a source.
Take advantage of nanoWatt XLP Sleep modes for battery-powered designs. According to Microchip PIC18 K22 datasheet, Sleep current is 20 nA typical with WDT disabled. Wake sources include INTx interrupts, port change-on-interrupt, ADC threshold, comparators, timers, and CTMU. For energy harvesting or coin-cell applications, use the RTC with external 32.768 kHz crystal to maintain timekeeping at sub-microamp current. Always measure actual current on your finished board - PCB leakage paths and external components can dominate the MCU's own Sleep current.
Informations de conformité
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - choose PIC18F automotive variants (e.g., PIC18F46K22-I/PT with AEC-Q100) for automotive applications. Industrial temperature grade -40C to +85C.