PIC18LF44J11-I/ML - 8-bit MCU, 16KB Flash, 44-QFN | Microchip
Teilenummer: PIC18LF44J11-I/ML ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $4.78 | $4,78 |
| 10 | $4.31 | $43,10 |
| 100 | $3.85 | $385,00 |
| 500 | $3.44 | $1.720,00 |
| 1.000 | $3.05 | $3.050,00 |
PIC18LF44J11-I/ML Übersicht
A microcontroller (MCU) is a single-chip computer containing a CPU core, program and data memory, and integrated peripherals. The PIC18 family uses a 16-bit instruction width with an 8-bit data path (modified Harvard architecture) optimized for deterministic interrupt response. Within the broader semiconductor taxonomy, MCUs fall under digital ICs -> microcontrollers -> embedded controllers -> microprocessors. The 8-bit class remains widely deployed in cost- and power-sensitive applications because of its small code footprint, mature toolchains, and low unit cost.
Key features of the PIC18LF44J11 include 16 KB self-programmable Flash program memory, 4 KB SRAM, 256 bytes of EEPROM, a 10-bit ADC with up to 13 channels, two analog comparators, two UART/SPI/I2C capable EUSART modules, two CCP modules, and a 31.25 kbps internal oscillator for low-power operation. The nanoWatt technology reduces sleep current below 1 uA, making the device attractive for battery-backed designs and always-on sensor nodes.
Architecturally, the PIC18LF44J11 uses an enhanced mid-range core with hardware multiply, single-cycle 16-bit instruction execution, and a vectored interrupt controller. Internal RC oscillators and on-chip voltage regulation simplify BOM by removing the need for external crystal or LDO in many configurations. The device supports in-circuit serial programming (ICSP) and self-programming of Flash under firmware control, enabling field upgrades.
Typical applications include handheld medical devices, portable consumer electronics, wireless sensor nodes (with external radio), HVAC controllers, smart thermostats, USB peripherals, and industrial control interfaces. The combination of low power, rich peripherals, and small footprint suits designs that require 8-bit processing efficiency without migrating to a more complex 32-bit platform.
When designing with this part, note that 44-pin QFN devices require careful thermal pad soldering and proper PCB land pattern geometry. The ICSP programming pins are shared with general-purpose I/O and must be considered when allocating pin functions. Always review the Microchip MPLAB X project settings to ensure the proper configuration bits for oscillator and watchdog behavior.
This page synthesizes distributor pricing, drop-in compatible alternatives, and practical design notes that complement the Microchip datasheet and accelerate your component selection decision.
Drop-in-Alternativen für PIC18LF44J11-I/ML – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit PIC18LF44J11-I/ML (gleiche Bauform und Footprint) – abweichend in Package, Timers, ADC, Operating Temperature, Program Memory (Flash).
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
PIC18LF44J11T-I/ML
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
PIC18LF44J10-I/ML
✅ Drop-In✓ Auf Lager
$2.2 / Stück
Datenblatt ansehen →PIC18LF44J10T-I/ML
✅ Drop-In✓ Auf Lager
$2.52 / Stück
Datenblatt ansehen →PIC18LF45J11-I/ML
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
PIC18LF45K22-I/ML
✅ Drop-In✓ Auf Lager
$2.28 / Stück
Datenblatt ansehen →PIC18LF44J11-I/ML Grenzwerte & elektrische Eigenschaften
| Core | PIC18 (8-bit, modified Harvard) |
| Instruction Set | 16-bit instructions, 8-bit data path |
| Program Memory (Flash) | 16 KB |
| Data Memory (SRAM) | 4 KB |
| EEPROM | 256 bytes |
| Operating Voltage | 2.0 V to 3.6 V |
| Maximum CPU Speed | 48 MHz (12 MIPS) |
| ADC | 10-bit, up to 13 channels |
| Comparators | 2 analog comparators |
| Timers | Multiple 8-bit and 16-bit timers |
| Communication | 2x EUSART (UART/SPI), 1x I2C/SPI |
| CCP Modules | 2 Capture/Compare/PWM modules |
| I/O Pins | Up to 34 digital I/O |
| Power-Saving Modes | nanoWatt technology, <1 uA sleep |
| Gehäuse | 44-pin QFN (ML), exposed thermal pad, 8x8 mm |
| Betriebstemperatur | -40C to +85C (Industrial) |
| Montageart | Surface Mount |
| RoHS-Status | Compliant |
| Programming | ICSP (In-Circuit Serial Programming), self-programmable Flash |
PIC18LF44J11-I/ML Pin-Konfiguration
| Pin 1 | RA0/AN0 — Digital I/O / Analog input channel 0 |
| Pin 2 | RA1/AN1 — Digital I/O / Analog input channel 1 |
| Pin 3 | RA2/AN2/VREF- — Digital I/O / Analog input channel 2 / ADC negative reference |
| Pin 4 | RA3/AN3/VREF+ — Digital I/O / Analog input channel 3 / ADC positive reference |
| Pin 5 | RA4/AN4 — Digital I/O / Analog input channel 4 |
| Pin 6 | RA5/AN5 — Digital I/O / Analog input channel 5 |
| Pin 7 | RA6/OSC2 — Digital I/O / Oscillator output |
| Pin 8 | RA7/OSC1 — Digital I/O / Oscillator input |
| Pin 9 | VDD — Positive power supply |
| Pin 10 | VSS — Ground reference |
| Pin 11 | RB0/INT0 — Digital I/O / External interrupt 0 |
| Pin 12 | RB1/INT1 — Digital I/O / External interrupt 1 |
| Pin 13 | RB2/INT2 — Digital I/O / External interrupt 2 |
| Pin 14 | RB3/INT3 — Digital I/O / External interrupt 3 |
| Pin 15 | RB4/KBI0 — Digital I/O / Keyboard interrupt |
| Pin 16 | RB5/KBI1 — Digital I/O / Keyboard interrupt |
| Pin 17 | RB6/KBI2/PGC — Digital I/O / Keyboard interrupt / ICSP clock |
| Pin 18 | RB7/KBI3/PGD — Digital I/O / Keyboard interrupt / ICSP data |
| Pin 19 | RC0/T1OSO — Digital I/O / Timer1 oscillator output |
| Pin 20 | RC1/T1OSI — Digital I/O / Timer1 oscillator input |
| Pin 21 | RC2/CCP1 — Digital I/O / Capture/Compare/PWM 1 |
| Pin 22 | RC3/SCL — Digital I/O / I2C clock |
| Pin 23 | RC4/SDA — Digital I/O / I2C data |
| Pin 24 | RC5/SDO — Digital I/O / SPI data out |
| Pin 25 | RC6/TX/CK — Digital I/O / UART TX / clock |
| Pin 26 | RC7/RX/DT — Digital I/O / UART RX / data |
| Pin 27 | RD0/PSP0 — Digital I/O / Parallel Slave Port data 0 |
| Pin 28 | RD1/PSP1 — Digital I/O / Parallel Slave Port data 1 |
| Pin 29 | RD2/PSP2 — Digital I/O / Parallel Slave Port data 2 |
| Pin 30 | RD3/PSP3 — Digital I/O / Parallel Slave Port data 3 |
| Pin 31 | RD4/PSP4 — Digital I/O / Parallel Slave Port data 4 |
| Pin 32 | RD5/PSP5 — Digital I/O / Parallel Slave Port data 5 |
| Pin 33 | RD6/PSP6 — Digital I/O / Parallel Slave Port data 6 |
| Pin 34 | RD7/PSP7 — Digital I/O / Parallel Slave Port data 7 |
| Pin 35 | RE0/RD — Digital I/O / Parallel Slave Port read |
| Pin 36 | RE1/WR — Digital I/O / Parallel Slave Port write |
| Pin 37 | RE2/CS — Digital I/O / Parallel Slave Port chip select |
| Pin 38 | VDDCORE — Regulated core supply decoupling |
| Pin 39 | VSS — Ground reference |
| Pin 40 | VDD — Positive power supply |
| Pin 41 | ENVREG — Voltage regulator enable |
| Pin 42 | VCAP — Internal voltage regulator bypass capacitor |
| Pin 43 | RF0 — Digital I/O (Port F) |
| Pin 44 | RF1 — Digital I/O (Port F) |
| Pin EP | EP — Exposed thermal pad (must be soldered to PCB ground plane) |
Typische Anwendungen
PIC18LF44J11-I/ML ist geeignet für 6 Anwendungs: Battery-Powered Sensor Node, Handheld Medical Device, HVAC Climate Controller, USB Human Interface Device, Industrial Control Interface, Smart Home Appliance Controller.
Battery-Powered Sensor Node
The PIC18LF44J11-I/ML is ideal for battery-powered wireless sensor nodes due to its 2.0V to 3.6V wide operating range and nanoWatt technology with sub-1 uA sleep current. Its 16 KB Flash accommodates over-the-air firmware update bootloaders plus application logic for environmental sensors (temperature, humidity, motion). The 10-bit ADC with 13 channels multiplexes multiple analog sensors without external switching. Two EUSART modules support simultaneous UART debug interface and SPI connection to an external radio transceiver (e.g., Sub-GHz or BLE module). Battery life in typical 10-second sleep / 50 ms active duty cycles exceeds 3 years from a single CR2032 cell.
Empfohlen
Handheld Medical Device
For handheld medical devices such as blood glucose meters, pulse oximeters, and portable ECG monitors, the PIC18LF44J11-I/ML provides deterministic 8-bit processing, low EMI signature, and small PCB footprint. The 12 MIPS performance is sufficient for signal preprocessing and display driving, while the 16 KB Flash supports secure bootloader and FDA-compliant firmware. Two analog comparators enable hardware-level threshold detection for vital-sign monitoring without software latency. The 44-QFN exposed-pad package enables compact designs that fit within handheld enclosures with strict thermal and size constraints.
Empfohlen
HVAC Climate Controller
HVAC and building automation controllers benefit from the PIC18LF44J11-I/ML's 13 ADC channels for reading multiple temperature, humidity, and pressure sensors in zoning applications. The 2x EUSART modules interface with Modbus RTU over RS-485 transceivers and a local user interface panel. nanoWatt technology ensures standby power consumption is minimal for always-on building controllers. The 256-byte EEPROM stores non-volatile configuration like calibration coefficients and user preferences without battery backup, simplifying the BOM and improving long-term reliability.
Empfohlen
USB Human Interface Device
The PIC18LF44J11-I/ML supports USB device implementations through external transceiver ICs and firmware using the Microchip USB stack. The 2x EUSART and SPI/I2C interfaces handle HID report generation, while 16 KB Flash accommodates USB enumeration, HID class drivers, and application logic for keyboards, mice, or custom HID peripherals. Two CCP modules enable LED brightness control via PWM. The 44-QFN package keeps USB dongle PCB size minimal, supporting compact consumer accessories.
Empfohlen
Industrial Control Interface
Industrial control interfaces such as PLC expansion modules, motor control auxiliary boards, and sensor transmitter hubs benefit from the PIC18LF44J11-I/ML's wide 2.0V-3.6V supply and industrial -40C to +85C operating temperature. The 10-bit ADC with 13 channels reads multiple 4-20 mA loop inputs through external current sense resistors, while the EUSART modules handle RS-485 Modbus or SPI communication with master controllers. Two analog comparators provide hardware fault detection for safety-critical industrial loops, reducing interrupt latency.
Empfohlen
Smart Home Appliance Controller
Smart home appliances including washing machines, dishwashers, and refrigerators use the PIC18LF44J11-I/ML as a user interface and sensor aggregation MCU. The 13 ADC channels read temperature, water level, and motor current sensors. nanoWatt technology keeps standby power compliant with energy efficiency regulations like ENERGY STAR. Two CCP modules drive buzzer PWM and triac-based load control. The exposed-pad QFN package provides robust thermal performance for enclosed appliance environments.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für PIC18LF44J11-I/ML – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | PIC18LF44J11T-I/ML | PIC18LF44J10-I/ML | PIC18LF44J10T-I/ML | PIC18LF45J11-I/ML | PIC18LF45K22-I/ML |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-QFN (ML) | 44-QFN (ML) - same | 44-QFN (ML) - same | 44-QFN (ML) - same | 44-QFN (ML) - same | 44-QFN (ML) - same |
| Flash Memory | 16 KB | 16 KB | 8 KB | 8 KB | 32 KB | 32 KB |
| SRAM | 4 KB | 4 KB | 4 KB | 4 KB | 8 KB | 2 KB |
| Operating Voltage | 2.0V to 3.6V | 2.0V to 3.6V | 2.0V to 3.6V | 2.0V to 3.6V | 2.0V to 3.6V | 1.8V to 3.6V |
| CPU Speed | 48 MHz (12 MIPS) | 48 MHz (12 MIPS) | 48 MHz (12 MIPS) | 48 MHz (12 MIPS) | 48 MHz (12 MIPS) | 64 MHz (16 MIPS) |
| EUSART Modules | 2 | 2 | 2 | 2 | 2 | 2 |
| ADC Channels | 13 (10-bit) | 13 (10-bit) | 13 (10-bit) | 13 (10-bit) | 13 (10-bit) | 28 (12-bit) |
Wichtigste Unterscheidungsmerkmale
- Balanced Flash and peripheral count for cost-sensitive 8-bit designs (vs. PIC18LF45K22-I/ML)
- nanoWatt low-power technology for battery applications (vs. PIC18LF44J10-I/ML)
- Wide 2.0V-3.6V supply range supports direct battery operation (vs. PIC18LF45K22-I/ML)
Designhinweise
The 44-pin QFN package requires careful PCB land pattern design per JEDEC MO-220. The exposed thermal pad (EP) must be soldered to a PCB ground plane for electrical grounding and thermal dissipation. Recommended land pattern uses NSMD (non-solder mask defined) pads with a center thermal pad of approximately 6x6 mm connected via thermal vias (typically 9-13 vias in a 3x3 to 4x4 grid). Stencil apertures for the center pad should be split into multiple smaller openings to prevent solder starvation and ensure reliable reflow.
The PIC18LF44J11 includes an internal voltage regulator that requires a decoupling capacitor on the VCAP pin (typically 1 uF to 10 uF X7R ceramic). The VDDCORE pin must not be driven externally - it is the output of the internal regulator. Place a 100 nF decoupling capacitor as close as possible to each VDD/VSS pair (one near pin 9/10 and another near pin 40/39) to minimize supply inductance and digital switching noise coupling into sensitive analog ADC inputs.
Isolate analog and digital sections on the PCB to prevent ADC accuracy degradation. Route analog signals (AN0-AN13, VREF+, VREF-) over a continuous ground plane and away from digital switching traces, PWM outputs, and clock lines. If VREF+ is connected to VDD, add a ferrite bead or small RC filter between the supply and the VREF+ pin to attenuate switching noise. Avoid running analog traces parallel to high-speed digital traces on adjacent layers without ground plane separation.
Configuration bits (fuses) must be set correctly during programming - particularly the oscillator selection, watchdog timer enable, brown-out reset voltage, and code protection bits. Forgetting to disable the watchdog in software can cause unintended resets. When using ICSP, ensure that the PGC/PGD pins (RB6/RB7) are not heavily loaded during programming, as this can cause programming failures. Always read the configuration bits before bulk erase to preserve any custom settings. Estimated: configuration bit settings are application-specific; consult Microchip PIC18 Configuration Settings document for your exact requirements.
When using the EUSART at high baud rates (above 115200 bps), keep the TX/RX traces short and matched in length if differential signaling is used. Add a series resistor (typically 22-33 ohms) close to the MCU TX pin if driving long cables, to dampen reflections. For SPI clock rates above 8 MHz, use proper impedance-controlled traces and consider source termination. The I2C bus requires pull-up resistors (typically 4.7 kohm at 100 kHz, 2.2 kohm at 400 kHz) selected based on bus capacitance.
Compliance-Informationen
RoHS and REACH compliant per Microchip product declaration. Lead-free and halogen-free. Industrial temperature grade -40C to +85C. Not AEC-Q100 qualified (industrial/consumer grade). CMRT available from Microchip on request.
