PIC18LF4439-I/PT - 8-bit MCU, 12KB Flash, 40MHz | Microchip
Teilenummer: PIC18LF4439-I/PT ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $8.12 | $8,12 |
| 10 | $7.45 | $74,50 |
| 100 | $6.5 | $650,00 |
| 500 | $5.78 | $2.890,00 |
| 1.000 | $5.1 | $5.100,00 |
PIC18LF4439-I/PT Übersicht
The PIC18 is an 8-bit RISC microcontroller family manufactured by Microchip Technology. Built on an enhanced Harvard architecture with separate program and data buses, the PIC18 family delivers up to 10 MIPS performance at 40 MHz, executes a 16-bit instruction word from Flash memory, and offers an instruction set optimised for C compiler code density. Within the broader semiconductor hierarchy, an MCU belongs to the embedded processor category and is distinct from a microprocessor in that peripherals, memory and interrupt controllers are integrated on-chip, reducing BOM cost and PCB area in volume designs.
Key features include the in-system programmable Flash (12KB / 6K x 16 words) accessed via ICSP, a 10-bit successive-approximation ADC with eight input channels, three independent serial peripherals (I2C, SPI, USART), one 8-bit and three 16-bit timers, and up to 32 digital I/O pins. The PWM module is enhanced for motor-control and power-conversion applications, while the Capture/Compare/PWM peripherals support input measurement and waveform generation.
Architecturally, the PIC18LF4439-I/PT uses an enhanced 16-bit instruction set with hardware multiply, eight-level deep hardware stack, and a vectored interrupt controller with multiple priority levels. The wide 2.0V to 5.5V supply range allows operation from single-cell Li-ion, two-cell alkaline, or regulated 3.3V/5V rails. Internal oscillator modes and a Phase-Locked Loop (PLL) reduce external component count, while the nanoWatt power-managed modes support sleep currents down to nanoampere levels.
Typical applications include industrial motor control, sensor signal conditioning, appliance controls, HVAC fan controllers, lighting ballasts, automotive body electronics (non-safety), medical instrumentation, and consumer white goods. The wide operating voltage makes it suitable for battery-powered portable devices, while the PWM and capture modules support closed-loop control of brushless DC motors and switched-mode power converters.
When designing with this MCU, allow for the decoupling capacitor network and a minimum ICSP header footprint if in-field firmware updates are required. Ensure the trace lengths between the crystal or external clock source and the OSC pins are short and guarded to preserve signal integrity and minimise EMI. The internal RC oscillator is sufficient for non-timing-critical tasks but should be replaced with a crystal when UART or PWM accuracy is required.
This page synthesizes distributor pricing, pin-compatible alternatives drawn from the same Microchip PIC18 family, and practical design notes - information not found in the standalone manufacturer datasheet and curated specifically for engineers sourcing PIC18LF4439-I/PT for new designs or service replacements.
Drop-in-Alternativen für PIC18LF4439-I/PT – 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 PIC18LF4439-I/PT (gleiche Bauform und Footprint) – abweichend in ADC, Core Architecture, Package, Program Memory (Flash), Timers.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
PIC18LF4439-I/P
✅ Drop-In✓ Auf Lager
$4.65 / Stück
Datenblatt ansehen →PIC18LF4439-I/ML
✅ Drop-In✓ Auf Lager
$5.85 / Stück
Datenblatt ansehen →PIC18LF442-I/PT
✅ Drop-In✓ Auf Lager
$5.85 / Stück
Datenblatt ansehen →PIC18LF4321-I/ML
✅ Drop-In✓ Auf Lager
$4.43 / Stück
Datenblatt ansehen →PIC18LF4221-I/PT
✅ Drop-In✓ Auf Lager
$3.16 / Stück
Datenblatt ansehen →PIC18LF4439-I/PT Grenzwerte & elektrische Eigenschaften
| Core | 8-bit PIC18 enhanced Harvard |
| Program Memory (Flash) | 12 KB (6K x 16 words) |
| Data Memory (RAM) | 640 bytes |
| Maximum Core Clock | 40 MHz (10 MIPS) |
| Supply Voltage (VDD) | 2.0 V to 5.5 V |
| Betriebstemperatur | -40 C to +85 C (Industrial) |
| ADC | 10-bit, 8 channels |
| Serial Interfaces | 1x I2C, 1x SPI, 1x USART |
| Timers | 1x 8-bit, 3x 16-bit |
| I/O Pins | 32 digital I/O |
| Gehäuse | TQFP-44 (PT) 10x10 mm |
| Montageart | Surface Mount |
| Program Memory Type | Flash (ICSP in-system programmable) |
| Operating Voltage Range | Low-voltage (LF) wide 2.0V-5.5V |
| RoHS-Status | Compliant |
| ICSP Programming | Yes (in-circuit serial programming) |
PIC18LF4439-I/PT Pin-Konfiguration
| Pin 1 | MCLR/VPP/RE3 — Master Clear reset (active-low) / Programming voltage / digital I/O port E3 |
| Pin 2 | RA0/AN0 — Digital I/O port A0 / analog input 0 |
| Pin 3 | RA1/AN1 — Digital I/O port A1 / analog input 1 |
| Pin 4 | RA2/AN2/VREF- — Digital I/O port A2 / analog input 2 / ADC negative reference |
| Pin 5 | RA3/AN3/VREF+ — Digital I/O port A3 / analog input 3 / ADC positive reference |
| Pin 6 | RA4/T0CKI — Digital I/O port A4 / Timer 0 clock input |
| Pin 7 | RA5/AN4/SS — Digital I/O port A5 / analog input 4 / SPI slave select |
| Pin 8 | RE0/RD/AN5 — Digital I/O port E0 / parallel-data read / analog input 5 |
| Pin 9 | RE1/WR/AN6 — Digital I/O port E1 / parallel-data write / analog input 6 |
| Pin 10 | RE2/CS/AN7 — Digital I/O port E2 / parallel-data chip select / analog input 7 |
| Pin 11 | VDD — Positive supply 2.0-5.5V |
| Pin 12 | VSS — Digital ground |
| Pin 13 | OSC1/CLKI — Crystal oscillator input / external clock input |
| Pin 14 | OSC2/CLKO/RA6 — Crystal oscillator output / clock output / digital I/O A6 |
| Pin 15 | RC0/T1OSO/T1CKI — Digital I/O port C0 / Timer 1 oscillator out / Timer 1 clock in |
| Pin 16 | RC1/T1OSI/CCP2 — Digital I/O port C1 / Timer 1 oscillator in / Capture Compare PWM 2 |
| Pin 17 | RC2/CCP1 — Digital I/O port C2 / Capture Compare PWM 1 |
| Pin 18 | RC3/SCK/SCL — Digital I/O port C3 / SPI clock / I2C clock |
| Pin 19 | RC4/SDI/SDA — Digital I/O port C4 / SPI data in / I2C data |
| Pin 20 | RC5/SDO — Digital I/O port C5 / SPI data out |
| Pin 21 | RC6/TX/CK — Digital I/O port C6 / USART asynchronous transmit / clock |
| Pin 22 | RC7/RX/DT — Digital I/O port C7 / USART asynchronous receive / data |
| Pin 23 | RB0/INT0 — Digital I/O port B0 / external interrupt 0 |
| Pin 24 | RB1/INT1 — Digital I/O port B1 / external interrupt 1 |
| Pin 25 | RB2/INT2 — Digital I/O port B2 / external interrupt 2 |
| Pin 26 | RB3/CCP2 — Digital I/O port B3 / Capture Compare PWM 2 (alternate) |
| Pin 27 | RB4 — Digital I/O port B4 |
| Pin 28 | RB5 — Digital I/O port B5 |
| Pin 29 | RB6/PGC — Digital I/O port B6 / ICSP clock |
| Pin 30 | RB7/PGD — Digital I/O port B7 / ICSP data |
| Pin 31 | AVSS — Analog ground |
| Pin 32 | AVDD — Analog supply |
| Pin 33 | RD0 — Digital I/O port D0 |
| Pin 34 | RD1 — Digital I/O port D1 |
| Pin 35 | RD2 — Digital I/O port D2 |
| Pin 36 | RD3 — Digital I/O port D3 |
| Pin 37 | RD4 — Digital I/O port D4 |
| Pin 38 | RD5 — Digital I/O port D5 |
| Pin 39 | RD6 — Digital I/O port D6 |
| Pin 40 | RD7 — Digital I/O port D7 |
| Pin 41 | RE0 — Digital I/O port E0 (alternate mapping) / RD/AN5 |
| Pin 42 | RE1 — Digital I/O port E1 (alternate mapping) / WR/AN6 |
| Pin 43 | RE2 — Digital I/O port E2 (alternate mapping) / CS/AN7 |
| Pin 44 | VSS — Digital ground |
Typische Anwendungen
PIC18LF4439-I/PT ist geeignet für 6 Anwendungs: Industrial Motor Control, HVAC Fan Controller, Appliance Control Board, Lighting Ballast and LED Driver, Battery-Powered Sensor Node, Consumer White Goods Display Controller.
Industrial Motor Control
The PIC18LF4439-I/PT fits industrial motor-control designs thanks to its 10-bit ADC, 16-bit timers, and three PWM/Capture/Compare channels. Its 40 MHz clock delivers 10 MIPS, enough to execute FOC or trapezoidal commutation loops at 10 kHz PWM frequency with adequate margin. The 2.0V-5.5V VDD range supports 3.3 V or 5 V analog front-ends, while the 32 I/O pins leave headroom for phase-current feedback, encoder inputs, and H-bridge protection. In typical BLDC drive applications, the same TQFP-44 footprint used in sister PIC18LF4431 designs can be shared, easing platform development.
Empfohlen
HVAC Fan Controller
The PIC18LF4439-I/PT's wide 2.0V-5.5V supply range, 8-channel ADC, and PWM outputs are well suited to HVAC variable-speed fan control. The MCU reads multiple temperature sensors (NTC, thermistor bridge), decides fan speed by a closed-loop PI algorithm, and drives the PWM output. nanoWatt sleep modes drop quiescent current to sub-uA when the fan is idle. PCB space is constrained in wall thermostats, but the 10x10 mm TQFP lands easily alongside a TRIAC opto-isolator. Migrating to a smaller QFN (PIC18LF4439-I/ML) is straightforward if the next revision tightens the board.
Empfohlen
Appliance Control Board
Washing machines, dishwashers, and induction cooktops frequently use the PIC18LF4439-I/PT as the central control MCU because of its strong 32 I/O budget, three serial peripherals, and 40 MHz core. Touch-key sensing, motor drivers, valve actuators, displays and serial user interface are all wired to the same MCU without external logic. Flash 12 KB / RAM 640 B accommodates real-time schedules plus user-interface state. The 10-bit ADC reads NTC thermistors for over-temperature protection - critical for safety compliance in cooker, kettle and dryer form factors.
Empfohlen
Lighting Ballast and LED Driver
The PIC18LF4439-I/PT works in digitally controlled HID ballasts and dimmable LED drivers because its 10-bit ADC and PWM can close the loop on current sense feedback. Its 5.5 V max VDD means a small front-end regulator from 120/230 V mains can power the MCU directly, eliminating a secondary flyback supply. SPI and I2C connect to addressable LED strings (APA101, WS2812) or DALI transceivers. The PT-44 footprint is large enough to integrate isolation barriers and thermal pads for a reliable driver module.
Empfohlen
Battery-Powered Sensor Node
Operating from 2.0 V to 5.5 V, the PIC18LF4439-I/PT can be powered directly from a single-cell Li-ion, two AA cells, or a regulated 3.3 V rail. Its nanoWatt Sleep and Idle modes drop the current to the sub-microampere range between sensor reads, extending battery life in remote sensor nodes. The 8-ch ADC is enough for temperature, humidity, gas and battery-voltage channels in a single MCU, while I2C/SPI connect to MEMS and digital gas sensors. The 12 KB Flash easily accommodates sensor-fusion and stack libraries for LoRa, Sigfox or Zigbee commissioning.
Empfohlen
Consumer White Goods Display Controller
The PIC18LF4439-I/PT's three serial peripherals are well matched to consumer appliance display modules - SPI for LCD graphic, I2C for capacitive touch and EEPROM, USART for diagnostics. The 32 I/O multiplex seven-segment, indicator LEDs, button arrays, and relays. Industrial -40C to +85C temperature rating survives behind oven or dishwasher facades. Other considerations include that the 12 KB Flash comfortably stores GUI plus housekeeping code, and that the wide VDD range tolerates unregulated mains-fed rails. The PT-44 footprint simplifies dual-sided board layouts near the LCD panel.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für PIC18LF4439-I/PT – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | PIC18LF4439-I/P | PIC18LF4439-I/ML | PIC18LF442-I/PT | PIC18LF4321-I/ML | PIC18LF4221-I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-44 (PT) 10x10 mm | PDIP-40 - different footprint | QFN-44 (ML) - different footprint | TQFP-44 (PT) - same | QFN-44 (ML) - different footprint, same family | TQFP-44 (PT) - same |
| Core Architecture | 8-bit PIC18 enhanced Harvard | 8-bit PIC18 enhanced Harvard | 8-bit PIC18 enhanced Harvard | 8-bit PIC18 enhanced Harvard | 8-bit PIC18 enhanced Harvard | 8-bit PIC18 enhanced Harvard |
| Program Memory (Flash) | 12 KB (6K x 16 words) | 12 KB | 12 KB | 16 KB (+33%) | 8 KB (-33%) | 4 KB (-67%) |
| Data Memory (RAM) | 640 bytes | 640 bytes | 640 bytes | 768 bytes (+20%) | 512 bytes (-20%) | 256 bytes (-60%) |
| Maximum Core Clock | 40 MHz (10 MIPS) | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| ADC Resolution | 10-bit, 8 channels | 10-bit, 8 channels | 10-bit, 8 channels | 10-bit, 8 channels | 10-bit, 8 channels | 10-bit, 8 channels |
| Supply Voltage (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 | 2.0 V to 5.5 V | 2.0 V to 5.5 V |
Wichtigste Unterscheidungsmerkmale
- Industrial -40C to +85C temperature grade with wide 2.0V-5.5V VDD (vs. PIC18F4439 (standard-V variant))
- Same TQFP-44 (PT) pinout as PIC18LF442-I/PT but with smaller Flash and lower cost (vs. PIC18LF442-I/PT)
- Reduced PWM count for cost-down motor-control designs (vs. PIC18LF4431-I/PT)
Designhinweise
Decoupling: place a 100 nF X7R ceramic between VDD (pin 11) and VSS (pin 12) within 3 mm of the pins; an additional 1-10 uF bulk capacitor should sit adjacent to the AVDD (pin 32) / AVSS (pin 31) analog supply pair. If AVDD is not connected on the PCB, tie it to VDD via a ferrite bead and a 100 nF cap to AVSS. The PIC18LF4439-I/PT can operate from a single-cell Li-ion down to 2.0 V, so a wide VDD tolerance reserve is essential when designing power-rail startup ramp - add a soft-start R-C at MCLR if inrush currents are high.
TQFP-44 layout: use 0.25 mm trace/space on the inner signal layers to escape the 0.8 mm pitch leads, and stitch ground via fence around the analog pins (AN0-AN7) for clean ADC reads. A solid ground pour should sit on layer 2 under the chip to provide thermal conduction (~31 C/W junction-to-ambient). Keep the crystal traces (OSC1/OSC2) as short as possible and guard them with a continuous ground trace; if not using an external crystal, tie OSC1 to VSS through 100 kOhm and leave OSC2 floating per Microchip recommendations for internal RC mode.
MCLR (pin 1) must not be left floating - it is the active-low reset and programming pin. Tie it to VDD through a 10 kOhm pull-up resistor and provide an external reset button to ground if in-field reset is needed. ICSP programming uses PGD (pin 30) and PGC (pin 29) on port B; do not populate external pull-ups on these traces that exceed 10 kOhm, as they can interfere with the programming waveform. Also note that the LF (low-voltage) variant differs from the F variant only in VDD max (5.5 V vs 5.5 V same; F = 4.2V min, LF = 2.0V min) - firmware headers may need CONFIG bits updated when swapping.
ADC accuracy: for 10-bit ENOB performance the ADC conversion clock must be between 1.6 us and 6.4 us (datasheet section 'ADC'). For VDD = 5 V, use Fosc/32 (TAD = 6.4 us at 40 MHz). For battery operation at 3.3 V or below, switch to Fosc/16 (TAD = 6.4 us at 10 MHz) or use the internal RC ADC. Always take multiple conversions and apply digital averaging if the input source impedance exceeds 2.5 kOhm - add an external op-amp buffer to the analog input rather than rely on the sample-and-hold amplifier to charge the 25 pF hold capacitor.
Compliance-Informationen
RoHS compliance per Microchip product page. PIC18LF4439-I/PT is industrial grade (-40C to +85C, I-suffix) - not AEC-Q100 qualified; for automotive safety applications use a PIC18 K-series MCU with explicit AEC-Q100 part number suffix.