PIC18LC442-I/P - 8-bit 40MHz 16KB OTP MCU | Microchip
Référence : PIC18LC442-I/P ✗ Fin de vie| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $9.95 | $9,95 |
| 10 | $8.96 | $89,60 |
| 100 | $7.97 | $797,00 |
| 500 | $6.99 | $3 495,00 |
| 1 000 | $5.99 | $5 990,00 |
PIC18LC442-I/P Présentation
What is a PIC18C microcontroller? The PIC18C/PIC18F family is Microchip's high-performance 8-bit RISC architecture, sitting one tier above the baseline PIC16 and below the dsPIC/PIC32 16- and 32-bit families. PIC18C parts use One-Time Programmable (OTP) EPROM for program storage, distinguishing them from the flash-based PIC18F parts that supersede this older line. PIC18 devices deliver up to 10 MIPS performance, feature a hardware 8x8 multiplier, and provide C-friendly architectures with 16-bit-wide instructions and 8-bit-wide data paths.
Key features of the PIC18LC442-I/P include 34 digital I/O pins, an integrated 10-bit Analog-to-Digital Converter (ADC) with multiple input channels, dual capture/compare/PWM (CCP) modules, an enhanced USART, MSSP (I2C/SPI) interface, multiple timer modules, and a priority-leveled interrupt controller. The 40-pin PDIP package provides ample I/O count for embedded applications, breadboard prototyping, and through-hole manufacturing.
The OTP memory architecture is the critical differentiator from PIC18F flash-based siblings like the PIC18F442. OTP parts are programmed once at production and cannot be re-flashed, making them suitable for mature, volume-deployed products where field updates are not required. The LC voltage range (2.0 V to 5.5 V) supports battery-powered and low-voltage designs.
Typical applications include industrial control modules, HVAC controllers, automotive body electronics, instrumentation front-ends, motor control boards, security/alarm panels, and cost-sensitive consumer appliances. The 40 MHz performance supports real-time DSP-style processing at modest computational loads.
When designing with this device, ensure your code is fully validated before programming because OTP cannot be erased or rewritten. For development, use a flash-based PIC18F variant or a windowed (JW) part for UV-eraseable prototypes.
This page synthesizes distributor pricing, drop-in alternatives within the same PIC18 40-pin PDIP footprint, and practical design notes not found in the standalone manufacturer datasheet, enabling faster component selection for production designs.
Alternatives de remplacement direct pour PIC18LC442-I/P — 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 PIC18LC442-I/P (même facteur de forme et même empreinte) — différant par Mounting Type, Package, Operating Temperature, ADC, Instruction Set.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
PIC18F442-I/P
✅ Remplacement direct✓ En stock
$5.4 / unité
Voir la fiche technique →PIC18F452-I/P
✅ Remplacement direct✓ En stock
$5.1 / unité
Voir la fiche technique →PIC18F442-I/L
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$3.75 / unité
Voir la fiche technique →PIC18LC442-I/L
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$5.55 / unité
Voir la fiche technique →PIC18C442-I/P
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$6.2 / unité
Voir la fiche technique →PIC18LC442-I/P Valeurs maximales et caractéristiques électriques
| Core | PIC18C 8-bit RISC |
| Program Memory Type | OTP (One-Time Programmable) EPROM |
| Program Memory Size | 16 KB (8K x 16) |
| RAM | 512 bytes |
| Maximum CPU Frequency | 40 MHz |
| Performance | 10 MIPS |
| Operating Voltage Range | 2.0 V to 5.5 V (LC variant) |
| Plage de température de fonctionnement | -40C to +85C (industrial, -I) |
| Digital I/O Pins | 34 |
| ADC | 10-bit integrated |
| Timer Modules | Multiple (TMR0/TMR1/TMR2/TMR3) |
| Capture/Compare/PWM | 2 CCP modules (enhanced) |
| Serial Interfaces | USART (enhanced), MSSP (SPI/I2C) |
| Hardware Multiplier | 8x8 single-cycle |
| Instruction Width | 16-bit instructions, 8-bit data path |
| Boîtier | 40-pin PDIP (P) |
| Type de montage | Through-Hole (DIP) |
Configuration des broches de PIC18LC442-I/P
| Broche 1 | /MCLR — Master Clear (reset) input, active low |
| Broche 2 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| Broche 3 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| Broche 4 | RA2/AN2 — PORTA bit 2 / Analog input 2 |
| Broche 5 | RA3/AN3/VREF+ — PORTA bit 3 / Analog input 3 / ADC VREF+ |
| Broche 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Broche 7 | RA5/AN4/SS — PORTA bit 5 / Analog input 4 / SPI slave select |
| Broche 8 | RE0/RD/AN5 — PORTE bit 0 / Read control for parallel port / Analog input 5 |
| Broche 9 | RE1/WR/AN6 — PORTE bit 1 / Write control for parallel port / Analog input 6 |
| Broche 10 | RE2/CS/AN7 — PORTE bit 2 / Chip select for parallel port / Analog input 7 |
| Broche 11 | VDD — Positive power supply (2.0 V to 5.5 V) |
| Broche 12 | VSS — Ground reference |
| Broche 13 | OSC1/CLKI — Crystal oscillator input / external clock input |
| Broche 14 | OSC2/CLKO — Crystal oscillator output / clock output |
| Broche 15 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| Broche 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 output |
| Broche 17 | RC2/CCP1 — PORTC bit 2 / CCP1 output (PWM) |
| Broche 18 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Broche 19 | RD0/PSP0 — PORTD bit 0 / Parallel Slave Port bit 0 |
| Broche 20 | RD1/PSP1 — PORTD bit 1 / Parallel Slave Port bit 1 |
| Broche 21 | RD2/PSP2 — PORTD bit 2 / Parallel Slave Port bit 2 |
| Broche 22 | RD3/PSP3 — PORTD bit 3 / Parallel Slave Port bit 3 |
| Broche 23 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Broche 24 | RC5/SDO — PORTC bit 5 / SPI data out |
| Broche 25 | RC6/TX/CK — PORTC bit 6 / USART TX / USART clock |
| Broche 26 | RC7/RX/DT — PORTC bit 7 / USART RX / USART data |
| Broche 27 | RD4/PSP4 — PORTD bit 4 / Parallel Slave Port bit 4 |
| Broche 28 | RD5/PSP5 — PORTD bit 5 / Parallel Slave Port bit 5 |
| Broche 29 | RD6/PSP6 — PORTD bit 6 / Parallel Slave Port bit 6 |
| Broche 30 | RD7/PSP7 — PORTD bit 7 / Parallel Slave Port bit 7 |
| Broche 31 | VSS — Ground reference |
| Broche 32 | VDD — Positive power supply (2.0 V to 5.5 V) |
| Broche 33 | RB0/INT0 — PORTB bit 0 / External interrupt 0 |
| Broche 34 | RB1/INT1 — PORTB bit 1 / External interrupt 1 |
| Broche 35 | RB2/INT2 — PORTB bit 2 / External interrupt 2 |
| Broche 36 | RB3/INT3/CCP2 — PORTB bit 3 / External interrupt 3 / CCP2 alternate |
| Broche 37 | RB4 — PORTB bit 4 |
| Broche 38 | RB5 — PORTB bit 5 |
| Broche 39 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Broche 40 | RB7/PGD — PORTB bit 7 / ICSP data |
Applications typiques
PIC18LC442-I/P convient pour 7 applications: Industrial Control Modules, HVAC and Climate Control, Security and Alarm Panels, Motor Control Boards, Instrumentation Front-Ends, Automotive Body Electronics, Consumer Appliance Controls.
Industrial Control Modules
The PIC18LC442-I/P's 40 MHz core and 34 I/O pins suit industrial PLC modules driving relays, sensors, and 4-20 mA loops. Its 2.0 V to 5.5 V operating range tolerates wide supply variation common on factory floors, and the integrated 10-bit ADC reads sensor outputs directly. The hardware 8x8 multiplier accelerates PID loop calculations for closed-loop control, and the 16-bit instruction width simplifies C compiler code generation. Program memory is one-time programmable, requiring validated firmware at production programming - making the device best for high-volume, well-characterized industrial products where firmware is locked.
Recommandé
HVAC and Climate Control
The PIC18LC442-I/P works well in HVAC controllers, where its 10-bit ADC reads thermistors and pressure transducers while its dual CCP modules generate PWM signals for fan speed and damper control. The enhanced USART connects to display boards or external modems for remote monitoring. Operating range of -40C to +85C handles unconditioned equipment rooms, and the 2.0 V-5.5 V supply allows direct operation from battery-backed rails during power-loss events. The OTP memory architecture is appropriate for finalized HVAC firmware where regulatory certification locks the code.
Recommandé
Security and Alarm Panels
The PIC18LC442-I/P provides the digital I/O count and peripheral integration needed for alarm panels with multiple zones, keypads, and sirens. Its 34 I/O pins interface with PIR motion sensors, door contacts, and glass-break detectors; the MSSP peripheral drives I2C keypad scanners and SPI expansion memory; the enhanced USART communicates with central monitoring stations via dial-up or GSM modules. The OTP memory architecture locks the certified alarm firmware against field tampering. Power consumption is low thanks to sleep modes drawing under 1 uA.
Recommandé
Motor Control Boards
The PIC18LC442-I/P drives stepper motors, brushed DC motors, and small three-phase BLDC motors via its dual CCP modules producing complementary PWM outputs with dead-band control. The 40 MHz CPU executes field-oriented control algorithms with adequate headroom, and the 10-bit ADC samples back-EMF and current-sense signals. The 34 I/O pins manage encoders, end-stop switches, and H-bridge gate drivers. The industrial temperature range accommodates motor-driver PCB environments, and the OTP architecture suits high-volume motor controller production.
Recommandé
Instrumentation Front-Ends
The PIC18LC442-I/P fits instrumentation front-ends requiring analog signal conditioning, sensor linearization, and digital display drive. The 10-bit ADC digitizes analog inputs from load cells, RTDs, and thermocouples (with external conditioning); the enhanced USART streams data to host PCs or display modules; and the MSSP peripheral drives SPI LCDs and I2C EEPROM for parameter storage. The hardware 8x8 multiplier accelerates RMS and trigonometric calculations. The OTP memory is appropriate when measurement calibration data is finalized and locked at production programming.
Recommandé
Automotive Body Electronics
The PIC18LC442-I/P supports interior body modules such as seat controllers, mirror adjusters, and lighting drivers where the PIC architecture has long automotive pedigree. The 34 I/O pins drive relays and LEDs, the dual CCP modules generate PWM for dimming and motor speed, and the 10-bit ADC reads current-sense shunts and position sensors. While the -I 85C range covers cabin environments, the OTP memory architecture requires production-finalized firmware. For under-hood or engine-compartment modules requiring 125C, consider PIC18F equivalents with automotive qualification.
Recommandé
Consumer Appliance Controls
The PIC18LC442-I/P powers washing machines, dishwashers, microwave ovens, and small kitchen appliances where cost-sensitive designs benefit from the PIC18C architecture. The 40 MHz CPU runs user-interface state machines, the enhanced USART connects to inverter boards, the CCP modules drive motor and heater PWM, and the integrated ADC reads temperature and humidity sensors. The OTP memory is ideal for cost-driven appliances where firmware is finalized and field updates are unnecessary. Industrial temperature range supports appliance interior environments.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PIC18LC442-I/P — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | PIC18F442-I/P | PIC18F452-I/P | PIC18F442-I/L | PIC18LC442-I/L | PIC18C442-I/P |
|---|---|---|---|---|---|---|
| Package | 40-pin PDIP (P) | 40-pin PDIP (P) - same | 40-pin PDIP (P) - same | 40-pin PDIP (P) - same | 40-pin PDIP (P) - same | 40-pin PDIP (P) - same |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Program Memory Size | 16 KB | 16 KB (flash) | 32 KB (flash) | 16 KB (flash) | 16 KB (OTP) | 16 KB (OTP) |
| Program Memory Type | OTP EPROM | Flash (re-programmable) | Flash (re-programmable) | Flash (re-programmable) | OTP EPROM | OTP EPROM |
| Maximum CPU 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 | 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 | 4.2 V to 5.5 V |
| Digital I/O Pins | 34 | 34 | 34 | 34 | 34 | 34 |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Lifecycle Status | Obsolete | Active | Active | Active | Obsolete | Obsolete |
| In-Circuit Programming | ICSP only (OTP) | ICSP with flash erase/write | ICSP with flash erase/write | ICSP with flash erase/write | ICSP only (OTP) | ICSP only (OTP) |
Principaux différenciateurs
- True drop-in 40-pin PDIP footprint (vs PIC18F442-I/P)
- Low-voltage LC variant supports 2.0 V operation (vs PIC18C442-I/P)
- Flash-based successor with field updates (vs PIC18F442-I/P)
Notes de conception
OTP memory architecture means PIC18LC442-I/P can only be programmed ONCE. Any code bug, configuration error, or bit-flip in the locked configuration word requires scrapping the part. Always validate firmware on a flash-based PIC18F442-I/P development board before committing to OTP production programming. The configuration word itself is OTP and cannot be modified after programming - plan oscillator, watchdog, and code-protect settings carefully.
The LC variant operates from 2.0 V to 5.5 V; below 4.2 V the maximum CPU frequency must be reduced to maintain timing margins (refer to the datasheet's VDD vs. Fosc graph). Decouple VDD with a 100 nF ceramic capacitor placed within 5 mm of the supply pins, plus a bulk 10 uF tantalum or aluminum capacitor for switching transients. Both VDD pins (11 and 32) and both VSS pins (12 and 31) must be connected for proper operation.
Place the 40 MHz crystal (or resonator) within 10 mm of pins 13/14 (OSC1/OSC2), and route the traces with ground guard to minimize EMI coupling. Keep high-current switching traces (motor drivers, relays) physically separated from the analog ADC inputs (RA0-RA5) to avoid ADC noise. Use separate analog (AVDD) and digital (DVDD) supplies only if the design warrants it; otherwise tie both to the same rail.
The 10-bit ADC achieves best performance when source impedance is below 2.5 kohm and acquisition time is set to the maximum (20 Tad). Use an external op-amp buffer for higher-impedance sensors (RTDs, thermocouples). Enable the ADC's hardware averaging mode (Acquisition Timer) for noisy industrial environments. Place analog ground (VSS) traces separately from high-current digital returns and join at a single point near the MCU.
Informations de conformité
RoHS compliance status is [DATA_NEEDED: RoHS compliance for PIC18LC442-I/P] - not in the data we verified. The PIC18C family pre-dates RoHS regulations for many parts; check Microchip's product environmental compliance page. AEC-Q100 qualification is not available for this PIC18C OTP line; use PIC18F Q1 automotive parts for AEC-Q100 requirements.
