PIC18LF442-I/L - 8-bit MCU 16KB Flash 40MHz 44-PLCC | Microchip
Teilenummer: PIC18LF442-I/L ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $9.85 | $9,85 |
| 10 | $8.94 | $89,40 |
| 100 | $7.92 | $792,00 |
| 500 | $7.05 | $3.525,00 |
| 1.000 | $6.28 | $6.280,00 |
PIC18LF442-I/L Übersicht
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (ROM/flash), data memory (RAM), and peripherals. The PIC18F architecture is an enhanced 8-bit family within the broader PIC microcontroller hierarchy, offering 77 single-word instructions with 16-bit instruction width. PIC18LF variants are the low-power "LF" family members optimized for 2.0-5.5 V operation, while PIC18F (without the "L") targets 4.2-5.5 V. The PIC18LF442 specifically targets industrial-temperature, low-voltage designs where the 2 V minimum rail extends battery and energy-harvesting lifetime.
Key differentiating specifications include a 10-bit ADC with up to 8 channels, a USART, MSSP (SPI/I2C), capture/compare/PWM modules, dual analog comparators, and a 16-bit timer architecture. The 40 MHz oscillator drives 10 MIPS throughput, making it well-suited for control loops and serial-bus bridging. Brown-out Reset (BOR), Power-on Reset (POR), Watchdog Timer with its own on-chip RC oscillator, and In-Circuit Serial Programming (ICSP) provide robust embedded deployment.
The PIC18F core uses a Harvard architecture with separate program and data buses, plus a 32-level hardware stack. The "LF" low-power process technology provides reduced active and sleep current versus the standard "F" siblings, which is the principal differentiator from PIC18F442 in 5 V designs. Code compatibility across PIC16C5X/PIC12CXXX/PIC16CXX/PIC17CXX preserves legacy code while enabling migration to higher performance.
Typical applications include industrial automation controllers, sensor interface nodes, automotive body electronics (non-safety), HVAC control panels, smart metering, and consumer appliance control. The 44-PLCC footprint is convenient for socketed prototyping and field-replaceable modules, and the 5.5 V tolerance eases integration with legacy 5 V analog front ends.
When designing with this part, place decoupling capacitors (100 nF plus bulk) within a few millimetres of every VDD/VSS pin pair, especially because the ADC reference shares VDD. Configure CONFIG words to match oscillator mode, BOR threshold, and watchdog state before code execution - locked-out debug or wrong clock mode is the most common bring-up failure on this family.
This page consolidates distributor pricing, drop-in compatible alternatives, and practical design notes that go beyond the manufacturer datasheet to support faster design-in and sourcing decisions for the PIC18LF442-I/L.
Drop-in-Alternativen für PIC18LF442-I/L – 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 PIC18LF442-I/L (gleiche Bauform und Footprint) – abweichend in Mounting Type, Core Architecture, Timers, Package, Program Memory (Flash).
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
PIC18F442-I/L
✅ Drop-In✓ Auf Lager
$3.75 / Stück
Datenblatt ansehen →PIC18LF442T-I/L
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
PIC18LF442-I/P
✅ Drop-In✓ Auf Lager
$5.55 / Stück
Datenblatt ansehen →PIC18LF452-I/L
✅ Drop-In✓ Auf Lager
$7.85 / Stück
Datenblatt ansehen →PIC18F452-I/L
✅ Drop-In✓ Auf Lager
$6.85 / Stück
Datenblatt ansehen →PIC18F442T-I/L
✅ Drop-In✓ Auf Lager
$4.61 / Stück
Datenblatt ansehen →PIC18LF442-I/L Grenzwerte & elektrische Eigenschaften
| Core Architecture | PIC18F (8-bit RISC, Harvard) |
| Instruction Set Width | 16-bit |
| Program Memory (Flash) | 16 KB (8K x 16) |
| Data RAM | 768 bytes |
| Data EEPROM | 256 bytes |
| Maximale Taktfrequenz | 40 MHz (10 MIPS) |
| Supply Voltage (VDD) | 2.0 V to 5.5 V |
| I/O Pins | 34 |
| ADC | 10-bit, up to 8 channels |
| Timers | Timer0/1/2/3, 16-bit capable |
| Capture/Compare/PWM | Yes (CCP/ECCP modules) |
| Communication | USART, MSSP (SPI / I2C) |
| Comparators | 2 analog comparators |
| Gehäuse | 44-pin PLCC (16.59 x 16.59 mm) |
| Betriebstemperatur | -40 C to +85 C (Industrial) |
| Montageart | Surface Mount (PLCC socket-compatible) |
| Programming/Debug | ICSP (In-Circuit Serial Programming) |
| RoHS-Status | Compliant |
PIC18LF442-I/L Pin-Konfiguration
| Pin 1 | MCLR/VPP — Master Clear (reset) input or programming voltage input |
| Pin 2 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| Pin 3 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| Pin 4 | RA2/AN2/VREF- — PORTA bit 2 / analog input 2 / ADC negative reference |
| Pin 5 | RA3/AN3/VREF+ — PORTA bit 3 / analog input 3 / ADC positive reference |
| Pin 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Pin 7 | RA5/AN4/SS — PORTA bit 5 / analog input 4 / SPI slave select |
| Pin 8 | RE0/RD/AN5 — PORTE bit 0 / read control / analog input 5 |
| Pin 9 | RE1/WR/AN6 — PORTE bit 1 / write control / analog input 6 |
| Pin 10 | RE2/CS/AN7 — PORTE bit 2 / chip select / analog input 7 |
| Pin 11 | VDD — Positive supply voltage |
| Pin 12 | VSS — Ground reference |
| Pin 13 | OSC1/CLKIN — Oscillator crystal input / external clock input |
| Pin 14 | OSC2/CLKOUT — Oscillator crystal output / clock output |
| Pin 15 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| Pin 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 output |
| Pin 17 | RC2/CCP1 — PORTC bit 2 / CCP1 PWM output |
| Pin 18 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Pin 19 | RD0/PSP0 — PORTD bit 0 / parallel slave port data |
| Pin 20 | RD1/PSP1 — PORTD bit 1 / parallel slave port data |
| Pin 21 | RD2/PSP2 — PORTD bit 2 / parallel slave port data |
| Pin 22 | RD3/PSP3 — PORTD bit 3 / parallel slave port data |
| Pin 23 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Pin 24 | RC5/SDO — PORTC bit 5 / SPI data out |
| Pin 25 | RC6/TX/CK — PORTC bit 6 / USART TX / USART clock |
| Pin 26 | RC7/RX/DT — PORTC bit 7 / USART RX / USART data |
| Pin 27 | RD4/PSP4 — PORTD bit 4 / parallel slave port data |
| Pin 28 | RD5/PSP5 — PORTD bit 5 / parallel slave port data |
| Pin 29 | RD6/PSP6 — PORTD bit 6 / parallel slave port data |
| Pin 30 | RD7/PSP7 — PORTD bit 7 / parallel slave port data |
| Pin 31 | VSS — Ground reference |
| Pin 32 | VDD — Positive supply voltage |
| Pin 33 | RB0/INT0 — PORTB bit 0 / external interrupt 0 |
| Pin 34 | RB1/INT1 — PORTB bit 1 / external interrupt 1 |
| Pin 35 | RB2/INT2 — PORTB bit 2 / external interrupt 2 |
| Pin 36 | RB3/CCP2 — PORTB bit 3 / CCP2 output (alternate) |
| Pin 37 | RB4 — PORTB bit 4 |
| Pin 38 | RB5/PGM — PORTB bit 5 / LVP programming |
| Pin 39 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Pin 40 | RB7/PGD — PORTB bit 7 / ICSP data |
| Pin 41 | NC — Not connected (per datasheet) |
| Pin 42 | NC — Not connected (per datasheet) |
| Pin 43 | NC — Not connected (per datasheet) |
| Pin 44 | NC — Not connected (per datasheet) |
Typische Anwendungen
PIC18LF442-I/L ist geeignet für 6 Anwendungs: Industrial Automation Controllers, Smart Metering and Energy Monitoring, HVAC Control Panels, Automotive Body Electronics, Consumer Appliance Control, Sensor Interface and Data Acquisition Nodes.
Industrial Automation Controllers
The PIC18LF442-I/L is a strong fit for industrial automation controllers thanks to its 34 digital I/O lines and 2.0-5.5 V wide supply range that tolerates 24 V-sourced rails after regulation. The 10-bit ADC (up to 8 channels) handles analog sensor inputs like temperature, pressure, and flow without an external ADC, and the on-chip USART plus MSSP (SPI/I2C) talk directly to industrial sensor modules, EEPROMs, and HMI displays. The 10 MIPS throughput drives PID control loops at multi-kHz rates, and the 40 MHz clock supports deterministic CAN-style timing when used with external transceivers. Industrial-temperature grade (-40 C to +85 C) ensures reliable operation in factory cabinets, while ICSP enables firmware updates on the production line.
Empfohlen
Smart Metering and Energy Monitoring
For smart metering, the PIC18LF442-I/L combines 16 KB flash for metering firmware, 768 bytes RAM for buffer and tariff logic, and 256 bytes EEPROM for non-volatile register storage (kWh, peak demand, time-of-use data). The extended 2.0 V minimum VDD allows direct operation from lithium-thionyl-chloride primary cells without a boost converter, increasing battery life for AMR (Automatic Meter Reading) endpoints. The 10-bit ADC samples current transformers and voltage dividers with adequate resolution for Class 1 metering when paired with appropriate CT conditioning. The USART interfaces with PLC modems or RF modules like Sub-GHz transceivers for AMI backhaul, and ICSP permits field firmware upgrades across utility fleet deployments.
Empfohlen
HVAC Control Panels
The PIC18LF442-I/L is well-suited to HVAC control panel controllers because the 34 I/O lines drive multiplexed seven-segment or LCD displays, keypads, and multiple relay outputs for fan, compressor, and damper control. The Capture/Compare/PWM modules generate control signals for variable-speed blower motors and triac-fired heater stages, while the analog comparators provide zero-crossing detection for synchronous triac triggering that minimizes EMI. The 16 KB flash holds control logic plus lookup-table-based temperature compensation, and the USART bridges to wireless thermostats or building-automation networks. Wide supply tolerance (2.0-5.5 V) simplifies 24 VAC-derived power designs after rectification, and the industrial temperature grade tolerates rooftop and basement equipment environments.
Empfohlen
Automotive Body Electronics
In non-safety automotive body electronics such as seat controllers, mirror adjusters, ambient lighting drivers, and body control modules, the PIC18LF442-I/L offers 34 I/O lines for motor drivers and switch inputs, plus PWM for lighting dimming and mirror positioning. The 10-bit ADC reads battery voltage (through a divider) and current sense for actuator feedback, while the USART interfaces with LIN bus transceivers for body networks. The -40 C to +125 C extended temperature variant (PIC18LF442-I/L is industrial -40 to +85 C; for full AEC-Q100 automotive grade, the PIC18F442-I/L or PIC18F452 family is preferred) is suitable for cabin-mounted modules. The 44-PLCC socketed package allows depot-level repair and module replacement without board-level rework.
Empfohlen
Consumer Appliance Control
Consumer appliances such as washing machines, dishwashers, ovens, and refrigerators use the PIC18LF442-I/L as the central controller where the 16 KB flash holds user-interface logic plus motor-control algorithms and the 768 byte RAM buffers sensor data and user settings. The 10-bit ADC reads temperature (NTC thermistors), water level, motor current, and door-switch state, while the PWM outputs drive triacs for heater elements, triac-fired valves, and brushless-DC motor drivers. The 2.0 V minimum VDD is useful for low-voltage standby rails that keep the RTC running during mains brownouts. ICSP support allows factory calibration plus field firmware updates for brand differentiation and post-launch bug fixes.
Empfohlen
Sensor Interface and Data Acquisition Nodes
The PIC18LF442-I/L serves as a sensor hub in distributed data-acquisition systems, where its 8-channel 10-bit ADC digitizes multiple sensors (temperature, humidity, pressure, gas) and its I2C/SPI MSSP port collects digital sensor data from external modules like accelerometers or CO2 sensors. The 768 byte RAM buffers sensor bursts before USART transmission to a host controller or wireless module, and the 2.0 V minimum VDD enables 3.3 V battery operation with months of battery life thanks to the PIC18LF sleep modes. The 40 MHz clock supports 100 kHz I2C Fast-mode and SPI up to several MHz, while the industrial temperature range handles outdoor and factory deployments.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für PIC18LF442-I/L – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | PIC18F442-I/L | PIC18LF442T-I/L | PIC18LF452-I/L | PIC18F452-I/L |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-PLCC | 44-PLCC - same | 44-PLCC - same | 44-PLCC - same | 44-PLCC - same |
| Flash Memory | 16 KB | 16 KB | 16 KB | 32 KB (+100%) | 32 KB (+100%) |
| RAM | 768 bytes | 768 bytes | 768 bytes | 1536 bytes (+100%) | 1536 bytes (+100%) |
| Maximum Clock | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| Supply Voltage | 2.0 V to 5.5 V (LF) | 4.2 V to 5.5 V (F) | 2.0 V to 5.5 V (LF) | 2.0 V to 5.5 V (LF) | 4.2 V to 5.5 V (F) |
| I/O Pins | 34 | 34 | 34 | 34 | 34 |
| ADC | 10-bit, 8 channels | 10-bit, 8 channels | 10-bit, 8 channels | 10-bit, 8 channels | 10-bit, 8 channels |
| Packaging Format | Tube | Tube | Tape & Reel | Tube | Tube |
Wichtigste Unterscheidungsmerkmale
- Wider low-voltage operating range (vs. PIC18F442-I/L)
- More flash and RAM than other 44-PLCC 442 siblings (vs. PIC18LF442T-I/L (same 16 KB flash / 768 B RAM))
- 44-PLCC socketed package enables field replacement (vs. Tighter footprint PIC18LF26K22-I/SO (SOIC-28))
Designhinweise
Place 100 nF ceramic decoupling capacitors within 5 mm of each VDD/VSS pair (pins 11/12 and 31/32) to suppress switching noise from the core. Add a bulk 10 uF tantalum or aluminum electrolytic capacitor near the PLCC socket for transient load handling, especially when driving high-current loads through PORTB or PORTD. The wide 2.0-5.5 V supply range of the LF variant enables direct battery operation, but verify BOR threshold (BOREN bit) matches the lowest expected battery voltage to avoid spurious resets during brownout.
For 44-PLCC designs, use a through-hole PLCC socket (e.g., 3M 8444-21B1-RK-TP) to enable socketed prototyping, field replacement, and easy in-circuit programming. If surface-mount is required, use a 44-PLCC SMT pad pattern that matches standard PLCC land geometry. Keep the oscillator traces (OSC1/OSC2, pins 13/14) short and isolated from digital switching lines; place the crystal or resonator within 10 mm of the OSC pins and guard the traces with a ground pour to reduce EMI susceptibility.
The most common bring-up failures on PIC18F devices are (1) CONFIG word mismatches where oscillator mode (HS vs XT vs RC) is incorrect for the chosen crystal, (2) MCLR/VPP pin left floating instead of pulled high with a 10 kohm resistor (or direct to VDD for non-reset designs), and (3) PGC/PGD pins (RB6/RB7) used as outputs before disabling Low-Voltage Programming in CONFIG4L. Always program CONFIG words first in MPLAB X before any code execution, and verify ICSP connection during prototype bring-up with a known-good programmer like PICkit 4.
Separate analog and digital ground planes when using the 10-bit ADC, with a single-point connection (star ground) near the MCU VSS pin to avoid digital return currents corrupting the analog reference. Use AVREF+ and AVREF- (RA3/RA2 or dedicated pins) for the ADC reference rather than VDD when high absolute accuracy is required, especially if VDD is shared with switching loads. The ADC sample-and-hold acquisition time must be calculated using TACQ from the datasheet, typically requiring ADCON2 to be set correctly for the chosen ADC clock source.
Compliance-Informationen
RoHS compliant per Microchip product page. Industrial temperature grade (-40 C to +85 C) only - not AEC-Q100 qualified for automotive safety applications; for AEC-Q100 designs use PIC18F family variants qualified for automotive.
