PIC18LC442T-I/L - 16KB Flash, 8-bit MCU, 44-PLCC | Microchip
Référence : PIC18LC442T-I/L ✗ Fin de vie| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $8.42 | $8,42 |
| 10 | $7.58 | $75,80 |
| 100 | $6.74 | $674,00 |
| 500 | $6.05 | $3 025,00 |
| 1 000 | $5.45 | $5 450,00 |
PIC18LC442T-I/L Présentation
Background: A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (ROM/Flash), working memory (RAM), and programmable I/O peripherals. The PIC18 family is Microchip's 8-bit RISC architecture, succeeding the PIC16 by adding a 16-bit instruction word (kept 8-bit for data path), hardware multiplier, and prioritized interrupts. The 'LC' suffix denotes the low-voltage CMOS variant optimized for 3.3V/5V dual-rail operation, while the 'I' suffix specifies the -40C to +85C industrial temperature range.
Key features include single-cycle hardware multiplication, priority-leveled interrupts, 10 MIPS sustained throughput, a wide 2.0V to 5.5V operating range, and built-in In-Circuit Serial Programming (ICSP) for field updates. The 33 I/O pins each source/sink up to 25 mA, enabling direct LED or relay drive without external buffers.
Architecturally, the device combines a Harvard-style RISC core with 16-bit instructions and an 8-bit data path, a 10-bit ADC with up to 8 input channels, three timer/counter modules, a USART with addressable mode, and a Master Synchronous Serial Port (MSSP) supporting SPI and I2C. The 16KB program memory is OTP/EPROM-based on the 'C' part family, distinguishing it from later flash-based PIC18F variants.
Typical applications include industrial automation controllers, HVAC sensor interfaces, motor control peripherals, low-end human-machine interface (HMI) panels, and embedded automotive body electronics. The wide voltage range also enables battery-powered instrumentation with single Li-ion cell support. Compared to PIC18F flash counterparts, the PIC18C EPROM variant is typically chosen for mature, mask-stable production runs.
Design consideration: When migrating to PIC18LC442T-I/L, ensure the PLL configuration and oscillator mode match the datasheet reference design; the 'LC' variant requires careful brown-out voltage selection for low-voltage operation. ISP/ICSP programming requires dedicated pin allocation that must be reserved during PCB design.
This page synthesizes distributor pricing, drop-in alternatives across the PIC18 family, and practical design notes not found in the manufacturer datasheet, including a side-by-side comparison with flash-based PIC18F equivalents.
Alternatives de remplacement direct pour PIC18LC442T-I/L — 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 PIC18LC442T-I/L (même facteur de forme et même empreinte) — différant par Operating Temperature, ADC, Package, Mounting Type, Timers.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
PIC18F442T-I/L
✅ Remplacement direct✓ En stock
$4.61 / unité
Voir la fiche technique →PIC18F452T-I/L
✅ Remplacement direct✓ En stock
$3.88 / unité
Voir la fiche technique →PIC18C442T-I/L
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PIC18C452T-I/L
✅ Remplacement direct✓ En stock
$5.75 / unité
Voir la fiche technique →PIC18LC452T-I/L
✅ Remplacement direct✓ En stock
$7.1 / unité
Voir la fiche technique →PIC18F458T-I/L
✅ Remplacement direct✓ En stock
$6.1 / unité
Voir la fiche technique →PIC18LC442T-I/L Valeurs maximales et caractéristiques électriques
| Program Memory Size | 16 KB (8K x 16) |
| RAM Size | 512 bytes |
| Number of I/O | 33 |
| CPU Core | PIC18C 8-bit RISC |
| Fréquence d'horloge maximale | 40 MHz |
| Instruction Throughput | 10 MIPS |
| Operating Voltage Range | 2.0 V to 5.5 V (3.3V/5V dual rail) |
| Plage de température de fonctionnement | -40C to +85C (industrial) |
| Boîtier / Format | 44-LCC (J-Lead), PLCC-44 |
| Type de montage | Surface Mount |
| Program Memory Type | OTP/EPROM |
| ADC | 10-bit, multi-channel |
| Oscillator Type | External |
| Hardware Multiplier | Yes (single-cycle) |
| Packaging | Tape & Reel (TR) |
| Statut RoHS | Compliant |
| Niveau MSL | 3 (168 hours) |
Configuration des broches de PIC18LC442T-I/L
| Broche 1 | MCLR — Master Clear (reset) input, active low |
| Broche 2 | OSC1/RA7 — Oscillator pin 1 or digital I/O RA7 |
| Broche 3 | OSC2/RA6 — Oscillator pin 2 or digital I/O RA6 |
| Broche 4 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| Broche 5 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| Broche 6 | RA2/AN2 — PORTA bit 2 / Analog input 2 |
| Broche 7 | RA3/AN3 — PORTA bit 3 / Analog input 3 / VREF+ |
| Broche 8 | RA4/AN4 — PORTA bit 4 / Analog input 4 |
| Broche 9 | RA5/AN5 — PORTA bit 5 / Analog input 5 |
| Broche 10 | VSS — Ground reference |
| Broche 11 | VDD — Positive supply voltage |
| Broche 12 | RB0/INT0 — PORTB bit 0 / External interrupt 0 |
| Broche 13 | RB1/INT1 — PORTB bit 1 / External interrupt 1 |
| Broche 14 | RB2/INT2 — PORTB bit 2 / External interrupt 2 |
| Broche 15 | RB3/INT3 — PORTB bit 3 / External interrupt 3 |
| Broche 16 | RB4 — PORTB bit 4 |
| Broche 17 | RB5 — PORTB bit 5 |
| Broche 18 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Broche 19 | RB7/PGD — PORTB bit 7 / ICSP data |
| Broche 20 | VSS — Ground reference |
| Broche 21 | VDD — Positive supply voltage |
| Broche 22 | RC0 — PORTC bit 0 |
| Broche 23 | RC1 — PORTC bit 1 |
| Broche 24 | RC2 — PORTC bit 2 |
| Broche 25 | RC3 — PORTC bit 3 |
| Broche 26 | RC4 — PORTC bit 4 |
| Broche 27 | RC5 — PORTC bit 5 |
| Broche 28 | RC6/TX — PORTC bit 6 / USART transmit |
| Broche 29 | RC7/RX — PORTC bit 7 / USART receive |
| Broche 30 | VSS — Ground reference |
| Broche 31 | VDD — Positive supply voltage |
| Broche 32 | RD0 — PORTD bit 0 |
| Broche 33 | RD1 — PORTD bit 1 |
| Broche 34 | RD2 — PORTD bit 2 |
| Broche 35 | RD3 — PORTD bit 3 |
| Broche 36 | RD4 — PORTD bit 4 |
| Broche 37 | RD5 — PORTD bit 5 |
| Broche 38 | RD6 — PORTD bit 6 |
| Broche 39 | RD7 — PORTD bit 7 |
| Broche 40 | VSS — Ground reference |
| Broche 41 | VDD — Positive supply voltage |
| Broche 42 | RE0/RD — PORTE bit 0 / Read control for parallel slave port |
| Broche 43 | RE1/WR — PORTE bit 1 / Write control for parallel slave port |
| Broche 44 | RE2/CS — PORTE bit 2 / Chip select for parallel slave port |
Applications typiques
PIC18LC442T-I/L convient pour 6 applications: Industrial Automation Controllers, HVAC Sensor Interface Boards, Low-End HMI / Display Panels, Motor Control Peripherals, Embedded Automotive Body Electronics, Battery-Powered Instrumentation.
Industrial Automation Controllers
The PIC18LC442T-I/L fits industrial automation controllers because its 16 KB OTP/EPROM program memory accommodates moderate-complexity PLC ladder logic, while the 33 I/O lines drive sensors, relays, and HMI displays directly without external buffers. The 10 MIPS throughput at 40 MHz handles real-time polling of multiple analog inputs via the 10-bit ADC and prioritized interrupts. Operating from 2.0V to 5.5V supports both 24V-sourced 5V rails and 3.3V logic compatibility for modern industrial backplanes.
Recommandé
HVAC Sensor Interface Boards
The PIC18LC442T-I/L is well suited to HVAC sensor interface boards thanks to its multi-channel 10-bit ADC for thermistor and pressure sensors, plus UART/USART connectivity for building management system (BMS) communication. The industrial -40C to +85C operating range covers rooftop equipment enclosures, and the wide 2.0V to 5.5V supply range supports battery-backed thermostats and 24VAC-derived rails. The 33 I/O enable direct control of relays, TRIACs, and indicator LEDs.
Recommandé
Low-End HMI / Display Panels
For low-end human-machine interface panels, the PIC18LC442T-I/L delivers 10 MIPS throughput to drive character LCDs and segmented LED displays while polling keypad inputs. The 33 I/O directly interface character-LCD data buses (4-bit or 8-bit mode) and 4x4 matrix keypads without external logic. The MSSP module provides SPI or I2C connectivity to dedicated display controller ICs, and the single-cycle hardware multiplier accelerates touch-panel coordinate calculations.
Recommandé
Motor Control Peripherals
The PIC18LC442T-I/L suits motor control peripherals including stepper drivers and small BLDC/PMSM commutation logic because the three timer/counter modules generate PWM outputs with flexible duty-cycle control. The 10 MIPS throughput sustains field-oriented control (FOC) loops for sub-kW motors, while the 33 I/O drive gate-driver enable signals, current-sense amplifiers, and Hall-effect sensor inputs. Operating voltage down to 2.0V supports Li-ion battery-powered robotics.
Recommandé
Embedded Automotive Body Electronics
The PIC18LC442T-I/L fits automotive body-electronics modules such as seat controllers, mirror adjusters, and lighting drivers. The 33 I/O source/sink 25 mA each, sufficient for LED arrays and small relay coils. The industrial -40C to +85C temperature range covers cabin environments, and the prioritized interrupts service CAN-LIN transceivers and switch-debounce events. OTP/EPROM provides design security by preventing firmware readout, valuable for aftermarket automotive parts.
Recommandé
Battery-Powered Instrumentation
The PIC18LC442T-I/L supports battery-powered instrumentation with its 2.0V to 5.5V supply range, enabling single Li-ion cell operation down to cutoff voltage. The 10 MIPS throughput with low-power SLEEP/IDLE modes suits portable data loggers and field measurement tools. The 10-bit ADC captures sensor data at low sample rates without external ADC ICs, and prioritized interrupts wake the CPU on measurement events. The wide industrial temperature range ensures outdoor deployment reliability.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PIC18LC442T-I/L — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | PIC18F442T-I/L | PIC18F452T-I/L | PIC18LC452T-I/L | PIC18C452T-I/L | PIC18F458T-I/L |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-PLCC (J-Lead) | 44-PLCC (J-Lead) - same | 44-PLCC (J-Lead) - same | 44-PLCC (J-Lead) - same | 44-PLCC (J-Lead) - same | 44-PLCC (J-Lead) - same |
| Program Memory Size | 16 KB (8K x 16) OTP/EPROM | 16 KB Flash | 32 KB Flash | 32 KB OTP/EPROM | 32 KB OTP/EPROM | 32 KB Flash |
| RAM Size | 512 bytes | 512 bytes | 1536 bytes | 1536 bytes | 1536 bytes | 1536 bytes |
| Number of I/O | 33 | 33 | 33 | 33 | 33 | 33 |
| Maximum Clock Frequency | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) |
| Operating Voltage Range | 2.0 V to 5.5 V (LC variant) | 2.0 V to 5.5 V (F variant) | 2.0 V to 5.5 V (F variant) | 2.0 V to 5.5 V (LC variant) | 4.2 V to 5.5 V (C variant) | 2.0 V to 5.5 V (F variant) |
| Program Memory Type | OTP/EPROM (one-time programmable) | Flash (reprogrammable) | Flash (reprogrammable) | OTP/EPROM | OTP/EPROM | Flash (reprogrammable) |
| CAN Module | No | No | No | No | No | Yes (CAN 2.0B) |
Principaux différenciateurs
- Lower-voltage CMOS 'LC' variant with 2.0V minimum supply (vs PIC18C442T-I/L)
- Active NRND status offers defined supply continuity vs EOL (vs PIC18LC442-I/PT (TQFP variant))
- Hardware-software migration path to Flash variant available (vs PIC18F442T-I/L (Flash))
Notes de conception
PIC18LC442T-I/L operates from 2.0V to 5.5V, supporting both 3.3V and 5V rails. Decouple VDD/VSS pairs with 100 nF ceramic capacitors placed within 5 mm of each VDD pin; the device has multiple VDD pins (pins 11, 21, 31, 41) that all require decoupling. Brown-out reset voltage must be configured via configuration bits (BOREN, BORV1:BORV0) to match your supply rail. Estimated: total quiescent current at 5V/4 MHz is approximately 1.6 mA in normal run mode and under 1 uA in SLEEP mode per Microchip PIC18CXX2 datasheet typical curves.
The 44-PLCC (J-Lead) footprint is a surface-mount package with through-hole-style leads. Use a JEDEC-compliant land pattern with 1.27 mm pitch. Reserve the ICSP pins (RB6/PGC pin 18 and RB7/PGD pin 19) for in-circuit programming access; routing these to test points or a programming header is recommended for field firmware updates. Place the 40 MHz crystal/oscillator within 10 mm of OSC1/OSC2 (pins 2/3) with short symmetric traces to minimize parasitic capacitance.
Common pitfalls when designing with PIC18LC442T-I/L: (1) OTP/EPROM is one-time-programmable - firmware must be 100% verified before production programming; consider PIC18F442T-I/L Flash variant for in-field updates. (2) Pin 1 dot indicator on PLCC-44 may be confused with the chamfered corner; confirm pin numbering against the datasheet diagram. (3) The 'LC' suffix means 2.0V-5.5V operation - do not substitute the standard 'C' PIC18C442T-I/L without verifying the supply rail. (4) The 33 I/O pins share with analog inputs and ICSP functions; configure analog/digital modes correctly via ADCON1 register to avoid contention.
For mixed-signal designs, isolate the analog AVdd/AVss supply (driven from VDD/VSS via ferrite beads) and place the analog input traces (RA0-RA5, pins 4-9) away from digital switching signals. Use a guard ring around analog inputs to reduce digital crosstalk into ADC readings. The 10-bit ADC requires adequate acquisition time (TACQ) - verify against the datasheet's ADC specification, typically 19.7 us at 40 MHz. Estimated: ADC accuracy degrades if source impedance exceeds 2.5 kOhm without adequate TACQ adjustment.
Informations de conformité
RoHS and REACH compliant per Microchip product declaration. Not AEC-Q100 qualified (industrial grade -40C to +85C only). Lead-free process per Microchip Pb-free transition.