PIC18LC601-I/L - 8-bit 25MHz ROMless MCU, 68-PLCC | Microchip
N.º de pieza: PIC18LC601-I/L ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $9.5 | $9,50 |
| 10 | $8.85 | $88,50 |
| 100 | $8.1 | $810,00 |
| 500 | $7.4 | $3.700,00 |
| 1.000 | $6.75 | $6.750,00 |
PIC18LC601-I/L Descripción general
An 8-bit microcontroller (MCU) is a programmable integrated circuit that combines a CPU, RAM, ROM/Flash, timers, and peripherals on a single die. It belongs to the larger hierarchy: 8-bit MCU -> microcontroller -> embedded processor -> semiconductor. The PIC18 family uses a Harvard RISC architecture with a 16-bit instruction word and 8-bit data path, providing deterministic execution and rich peripheral integration for cost-effective embedded designs.
Key features include 1.5 KB of general-purpose RAM, 26 digital I/O pins, multiple 8/16-bit timers, USART, I2C, SPI peripherals, a 10-bit ADC, and capture/compare/PWM modules. The 'LC' suffix designates a low-voltage core (typically 3.3V operation), while the ROMless nature allows flexible program storage in external EPROM/Flash. The 25 MHz clock yields 10 MIPS instruction throughput.
The PIC18LC601 uses a modified Harvard RISC core with 77 instructions and hardware multiply support, providing predictable timing for real-time control. The external memory bus is multiplexed to maximize I/O availability, with separate program and data addressing. Its low-power architecture and CMOS process enable extended operation in battery-powered systems.
Typical applications include industrial automation, motor control, sensor interfaces, embedded control panels, and prototype development for PIC18-based products. It is also used in legacy system maintenance, retrofits, and educational platforms due to its external-memory architecture and broad peripheral set.
When designing with this MCU, plan memory decoding and bus-arbitation logic for the external program memory interface, and consider migration to flash-based PIC18F variants for production. Use the industrial (-I) temperature range of -40C to +85C for harsh environments.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Alternativas directas para PIC18LC601-I/L — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con PIC18LC601-I/L (mismo factor de forma y huella) — difiere en Mounting Type, Operating Temperature, Number of I/O Pins, Core Architecture, Instruction Set.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
PIC18C601-I/L
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
PIC18C801-I/L
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$6.25 / unidad
Ver hoja de datos →PIC18LC601-I/L Valores máximos y características eléctricas
| Core Architecture | PIC 8-bit RISC (Harvard) |
| Series | PIC18C |
| Program Memory Type | ROMless (external memory bus) |
| Maximum External Program Memory | 256 KB (via external memory interface) |
| RAM Size | 1.5 KB x 8 |
| Maximum CPU Speed | 25 MHz |
| Number of I/O Pins | 26 |
| Encapsulado | 68-LCC (J-Lead), PLCC-68 |
| Operating Voltage | 2.5 V to 5.5 V (low-voltage 'LC' core) |
| Oscillator Type | External |
| Instruction Set | PIC18C (77 instructions, 16-bit opcode) |
| Temperatura de funcionamiento | -40C to +85C (industrial 'I' grade) |
| Tipo de montaje | Surface Mount (PLCC socket compatible) |
| Packaging | Tube |
| Estado RoHS | Compliant |
| Lead-Free | Yes |
Guía de configuración de pines de PIC18LC601-I/L 68-lcc (j-lead), plcc-68
Configuración de pines para PIC18LC601-I/L (encapsulado 68-lcc (j-lead), plcc-68). Este CI digital incluye GPIO, interfaces de comunicación (UART, SPI, I2C) y pines de alimentación. Consulte la hoja de datos del fabricante para conocer las funciones alternativas de los pines y las opciones de configuración. Esencial para el diseño de sistemas embebidos y el diseño de PCB.
No hay datos detallados de patillaje disponibles para PIC18LC601-I/L.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
PIC18LC601-I/L es adecuado para 7 aplicacións: Embedded Industrial Control Systems, Motor Control and PWM Drive, Sensor Interface and Data Acquisition, Prototype Development and Education Platforms, Legacy System Maintenance and Retrofits, Communication Gateway and Protocol Conversion, Automotive Body and Comfort Electronics.
Embedded Industrial Control Systems
The PIC18LC601-I/L is well suited to industrial control panels, PLCs, and machine interfaces due to its 25 MHz CPU, 26 I/O lines, and industrial -40C to +85C temperature range. The ROMless architecture enables rapid firmware iteration during development via external EPROM reprogramming without chip replacement. Combined with USART, I2C, and SPI peripherals, the MCU can interface with sensors, motor drivers, and HMI displays in factory automation environments where deterministic 8-bit control and proven PIC18 reliability are valued.
Recomendado
Motor Control and PWM Drive
The PIC18LC601-I/L supports motor-control applications via its capture/compare/PWM modules and 25 MHz CPU, which provides sufficient throughput for PID loop calculation and PWM generation at typical 20-50 kHz switching frequencies. The 1.5 KB RAM holds real-time variables for speed, current, and position feedback. The industrial temperature grade and robust PIC18 architecture suit stepper/DC servo control in industrial equipment, while the low-voltage 'LC' core enables 3.3V-only designs.
Recomendado
Sensor Interface and Data Acquisition
Sensor interface nodes leverage the PIC18LC601-I/L's USART, I2C, and SPI peripherals to aggregate data from temperature, pressure, and flow sensors. The 26 I/O lines accommodate multiple sensor inputs and digital outputs, while the 10 MIPS instruction rate supports basic signal conditioning and averaging algorithms. ROMless designs allow field firmware updates via external memory swap, useful in remote sensor deployments where in-circuit reprogramming is impractical.
Recomendado
Prototype Development and Education Platforms
The PIC18LC601-I/L is a classic choice for PIC18 development boards, training kits, and university embedded courses due to its external memory bus, which lets students observe Harvard architecture and bus arbitration in real time. Educational use benefits from the ROMless design that allows code swap without chip erasure, and from the well-documented PIC18 instruction set. The PLCC-68 socket-mount package simplifies lab work, as damaged MCUs can be replaced without desoldering.
Recomendado
Legacy System Maintenance and Retrofits
Many industrial, automotive, and aerospace systems built in the late 1990s-2000s used PIC18C-series ROMless MCUs, and the PIC18LC601-I/L supports ongoing maintenance, retrofit, and obsolescence management of those platforms. The PLCC-68 socketed form factor enables direct swap-in replacements for failed units in fielded equipment. The industrial temperature grade and proven PIC18 reliability ensure compatibility with existing system firmware and hardware interfaces, minimizing redesign effort.
Recomendado
Communication Gateway and Protocol Conversion
Communication gateway designs use the PIC18LC601-I/L for protocol bridging between RS-232/RS-485, I2C, SPI, and sensor networks. The USART, I2C, and SPI peripherals enable simultaneous multi-bus operation, while the 25 MHz CPU handles basic protocol parsing and frame forwarding. The ROMless architecture supports gateway firmware that references large lookup tables stored in external memory, useful for protocol translation databases and configuration storage in networked embedded systems.
Recomendado
Automotive Body and Comfort Electronics
Although the PIC18LC601-I/L is not AEC-Q100 qualified, it is used in non-safety automotive body applications such as interior lighting controllers, seat memory modules, and accessory interfaces in cost-sensitive vehicle platforms. The 25 MHz CPU and 26 I/O lines support multi-channel PWM for LED dimming and motor positioning. For safety-critical or modern automotive designs, designers should migrate to AEC-Q100-qualified PIC18F variants with on-chip flash for production reliability.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para PIC18LC601-I/L — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | PIC18C601-I/L | PIC18C801-I/L | PIC18F8720-I/PT |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 68-LCC (J-Lead) | 68-LCC (J-Lead) - same | 68-LCC (J-Lead) - same | TQFP-80 - different |
| Program Memory Type | ROMless (external) | ROMless | ROMless | Flash 128 KB |
| Maximum CPU Speed | 25 MHz | 25 MHz | 25 MHz | 25 MHz |
| RAM Size | 1.5 KB | 1.5 KB | 1.5 KB | 3.8 KB |
| Number of I/O Pins | 26 | 26 | 26 | 70 |
| Operating Voltage | 2.5 V to 5.5 V (LC low-voltage core) | 4.2 V to 5.5 V (5V core) | 4.2 V to 5.5 V (5V core) | 4.2 V to 5.5 V (5V core) |
| Architecture Family | PIC18C (ROMless) | PIC18C | PIC18C | PIC18F |
Diferenciadores clave
- ROMless architecture with external memory bus (frente a PIC18F8720-I/PT)
- Low-voltage LC core operation (frente a PIC18C601-I/L)
- PLCC-68 socket-compatible package (frente a PIC18F8720-I/PT (TQFP-80))
Notas de diseño
The PIC18LC601-I/L is a low-voltage 'LC' core requiring 3.3V typical supply (2.5-5.5V range). Use a low-dropout regulator with adequate decoupling - 100nF ceramic on each VDD pin and 10uF bulk capacitor on the supply rail. The MCU has multiple VDD/VSS pins around the PLCC-68 perimeter; all must be connected for proper operation. Brown-out reset (BOR) circuitry should be enabled in configuration bits to ensure defined startup behavior at low voltages.
According to the PIC18LC601 errata documentation, certain devices exhibit anomalous behavior in their Timer1 modules. Engineers must review the Microchip errata sheet for the PIC18LC601 silicon revision they are using and apply recommended workarounds. Additionally, designers should not assume flash-based PIC18 firmware patterns will port directly - the ROMless PIC18LC601 requires external memory bus configuration and wait-state setup at 25 MHz to avoid bus contention.
When laying out the PLCC-68 footprint, use a socket for development so failed or upgraded MCUs can be swapped without desoldering. Provide clean ground and power planes under the package, and place external memory (EPROM/Flash) as close to the address/data bus pins as possible to minimize bus skew. Add pull-up resistors on I2C and MCLR pins per PIC18 datasheet recommendations, and route the external memory bus with matched-length traces to avoid timing violations at 25 MHz.
Información de cumplimiento
RoHS and lead-free compliant per Microchip product documentation. Not AEC-Q100 qualified - for automotive applications use AEC-Q100 qualified PIC18F variants. REACH and conflict-minerals status confirmed compliant per Microchip material declarations.
