PIC18LC601-I/PT - 8-bit ROMless MCU, 25MHz, 64-TQFP | Microchip
N.º de pieza: PIC18LC601-I/PT ✗ Fin de vida| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $11.5 | $11,50 |
| 10 | $10.35 | $103,50 |
| 100 | $9.25 | $925,00 |
| 500 | $8.4 | $4.200,00 |
| 1.000 | $7.65 | $7.650,00 |
PIC18LC601-I/PT Descripción general
Key features include 25 MHz maximum clock speed, an external oscillator interface, ROMless program memory for external code storage, and an extended instruction set optimized for C-compiled code. The LC variant operates at a lower core voltage than the PIC18F family, making it suitable for low-voltage applications, while the 64-pin TQFP footprint provides ample I/O for medium-complexity embedded designs.
The PIC18C601 architecture is built around an enhanced 8-bit RISC core with a modified Harvard bus structure. As a ROMless device, the PIC18LC601-I/PT requires external program memory (typically EPROM or Flash) wired to its external memory bus. This makes it ideal for development, prototyping, and low-volume production where code flexibility is more important than integration.
Typical applications include industrial control systems, motor control, automotive body electronics, consumer appliances, and embedded prototyping platforms. Because the part is ROMless, it is well-suited for code-development work where the final firmware image needs to be updatable after deployment.
When designing with this device, careful PCB layout of the external memory bus is critical to avoid data corruption at high clock rates. The 64-pin TQFP package requires a 0.5 mm pitch footprint, and the designer must allocate sufficient board area for decoupling and trace impedance control on the external memory interface.
This page synthesizes distributor pricing from DigiKey, Mouser, and Octopart with practical drop-in alternatives and engineering guidance not always present in the manufacturer datasheet.
Alternativas directas para PIC18LC601-I/PT — 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/PT (mismo factor de forma y huella) — difiere en Package, Core Architecture, Program Memory Type, ADC, I/O Pins.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
PIC18C601-I/PT
✅ Sustitución directa✓ En stock
$6.08 / unidad
Ver hoja de datos →PIC18LC601T-I/PT
✅ Sustitución directa✓ En stock
$6.2 / unidad
Ver hoja de datos →PIC18F8723-I/PT
✅ Sustitución directa✓ En stock
$7.95 / unidad
Ver hoja de datos →PIC18F8722-I/PT
✅ Sustitución directa✓ En stock
$6.5 / unidad
Ver hoja de datos →PIC18F8720-E/PT
✅ Sustitución directa✓ En stock
$9.3 / unidad
Ver hoja de datos →PIC18LC601-I/PT Valores máximos y características eléctricas
| Core Architecture | PIC 8-bit RISC (PIC18) |
| Program Memory Type | ROMless (external memory required) |
| RAM Size | 1.5K x 8 (1.5 KB) |
| Maximum Clock Speed | 25 MHz |
| Tensión de alimentación | 5 V (LC low-voltage variant) |
| Number of I/O Pins | 26 |
| Oscillator Type | External |
| Encapsulado / Carcasa | 64-TQFP (TQFP-64) |
| Tipo de montaje | Surface Mount |
| Temperatura de funcionamiento | -40C to +85C (Industrial) |
| Recuento de pines | 64 |
| Instruction Set | Enhanced PIC18 (16-bit instructions, 8-bit data) |
| Packaging | Tube (Tray equivalent) |
| Temperature Grade | Industrial |
Configuración de pines de PIC18LC601-I/PT
| Pin 1 | RC0 — PORTC bit 0 (I/O) |
| Pin 2 | RC1 — PORTC bit 1 (I/O) |
| Pin 3 | RC2 — PORTC bit 2 (I/O) |
| Pin 4 | RC3 — PORTC bit 3 (I/O) |
| Pin 5 | RC4 — PORTC bit 4 (I/O) |
| Pin 6 | RC5 — PORTC bit 5 (I/O) |
| Pin 7 | RC6 — PORTC bit 6 (I/O) |
| Pin 8 | RC7 — PORTC bit 7 (I/O) |
| Pin 9 | VSS — Ground |
| Pin 10 | RD0 — PORTD bit 0 (external memory data bus D0) |
| Pin 11 | RD1 — PORTD bit 1 (external memory data bus D1) |
| Pin 12 | RD2 — PORTD bit 2 (external memory data bus D2) |
| Pin 13 | RD3 — PORTD bit 3 (external memory data bus D3) |
| Pin 14 | RD4 — PORTD bit 4 (external memory data bus D4) |
| Pin 15 | RD5 — PORTD bit 5 (external memory data bus D5) |
| Pin 16 | RD6 — PORTD bit 6 (external memory data bus D6) |
| Pin 17 | RD7 — PORTD bit 7 (external memory data bus D7) |
| Pin 18 | VSS — Ground |
| Pin 19 | VDD — Positive supply |
| Pin 20 | RA0 — PORTA bit 0 (analog/digital I/O) |
| Pin 21 | RA1 — PORTA bit 1 (analog/digital I/O) |
| Pin 22 | RA2 — PORTA bit 2 (analog/digital I/O) |
| Pin 23 | RA3 — PORTA bit 3 (analog/digital I/O) |
| Pin 24 | RA4 — PORTA bit 4 (analog/digital I/O) |
| Pin 25 | RA5 — PORTA bit 5 (analog/digital I/O) |
| Pin 26 | OSC2 — Oscillator output |
| Pin 27 | OSC1 — Oscillator input / external clock |
| Pin 28 | VSS — Ground |
| Pin 29 | VDD — Positive supply |
| Pin 30 | RB0 — PORTB bit 0 (external interrupt capable) |
| Pin 31 | RB1 — PORTB bit 1 |
| Pin 32 | RB2 — PORTB bit 2 |
| Pin 33 | RB3 — PORTB bit 3 |
| Pin 34 | RB4 — PORTB bit 4 |
| Pin 35 | RB5 — PORTB bit 5 |
| Pin 36 | RB6 — PORTB bit 6 (in-circuit debug) |
| Pin 37 | RB7 — PORTB bit 7 (in-circuit debug) |
| Pin 38 | VSS — Ground |
| Pin 39 | VDD — Positive supply |
| Pin 40 | RE0 — PORTE bit 0 (external memory RD) |
| Pin 41 | RE1 — PORTE bit 1 (external memory WR) |
| Pin 42 | RE2 — PORTE bit 2 (external memory CS) |
| Pin 43 | RE3 — PORTE bit 3 |
| Pin 44 | RE4 — PORTE bit 4 |
| Pin 45 | RE5 — PORTE bit 5 |
| Pin 46 | RE6 — PORTE bit 6 |
| Pin 47 | RE7 — PORTE bit 7 |
| Pin 48 | VSS — Ground |
| Pin 49 | RA6 — PORTA bit 6 |
| Pin 50 | RA7 — PORTA bit 7 |
| Pin 51 | VDD — Positive supply |
| Pin 52 | VSS — Ground |
| Pin 53 | AVDD — Analog positive supply |
| Pin 54 | AVSS — Analog ground |
| Pin 55 | VDD — Positive supply |
| Pin 56 | VSS — Ground |
| Pin 57 | VDD — Positive supply |
| Pin 58 | VSS — Ground |
| Pin 59 | VDD — Positive supply |
| Pin 60 | VSS — Ground |
| Pin 61 | VDD — Positive supply |
| Pin 62 | VSS — Ground |
| Pin 63 | MCLR — Master clear / reset input (active low) |
| Pin 64 | NC — Not connected (per datasheet) |
Aplicaciones típicas
PIC18LC601-I/PT es adecuado para 6 aplicacións: Industrial Control Systems, Embedded Prototyping and Development, Automotive Body Electronics, Consumer Appliance Control, External Memory Code Storage Systems, Educational and Training Platforms.
Industrial Control Systems
The PIC18LC601-I/PT fits industrial control applications that need a flexible 8-bit controller with external memory expansion. Its 25 MHz enhanced PIC18 RISC core delivers 6.25 MIPS, sufficient for motor-control loops, sensor fusion, and PWM generation in PLC input modules. The 26 I/O pins handle discrete input scanning, actuator driver control, and serial communication to upstream controllers. Because the part is ROMless, firmware updates are possible by re-programming the external EPROM without reworking the MCU, simplifying field maintenance. Designers must respect the LC variant's low-voltage operation and add adequate decoupling on the external memory bus for noise immunity.
Recomendado
Embedded Prototyping and Development
The PIC18LC601-I/PT is a strong fit for embedded prototyping because its ROMless architecture lets engineers iterate code rapidly by swapping external EPROMs. The 1.5 KB of internal RAM supports reasonable C-compiled codebases, while the enhanced PIC18 instruction set - 16-bit opcodes with 8-bit data - is fully supported by the MPLAB XC8 compiler. The TQFP-64 breakout footprint exposes all 26 I/O pins plus the external memory interface, making it ideal for evaluation boards. Engineers transitioning to production can later migrate to PIC18F parts in the same TQFP-64 footprint, preserving the prototype's PCB layout.
Recomendado
Automotive Body Electronics
Although the PIC18LC601-I/PT is rated for the industrial -40C to +85C range (not AEC-Q100 automotive), its architecture and peripheral set make it suitable for non-safety automotive body applications such as instrument clusters, lighting controllers, and HVAC user interfaces. The 25 MHz core, 1.5 KB RAM, and 26 I/O pins are sufficient for stepper-motor gauge driving and CAN/LIN gateway bridging via external transceivers. The LC voltage range supports direct 3.3V or 5V operation from body-control battery rails. For production, transition to PIC18FxxQ automotive Flash parts in the same TQFP-64 footprint.
Recomendado
Consumer Appliance Control
The PIC18LC601-I/PT is well-suited to consumer appliances such as washing-machine control boards, microwave oven user interfaces, and induction-cooktop controllers. Its 25 MHz core runs user-interface state machines, sensor-sampling loops, and triac-zero-crossing detection at typical appliance update rates. The 26 I/O pins accommodate keypad scanning, seven-segment LCD driving, and relay/solenoid actuation. The ROMless architecture simplifies late-stage firmware tuning where final behaviour depends on field feedback. Use the LC variant for 3.3V battery-backed operation in low-power standby modes common to appliance designs.
Recomendado
External Memory Code Storage Systems
Because the PIC18LC601-I/PT is ROMless, it is uniquely suited to systems that use external parallel EPROM or Flash for code storage, including legacy firmware-revision management and bootstrapping applications. The external memory interface on PORTD/PORTE supports up to 64 KB of program memory, allowing large assembly-coded projects or boot-loader-based designs. The 1.5 KB RAM provides data scratch space while the external EPROM handles code. This application niche persists today in legacy industrial systems where firmware updates must be field-replaceable without MCU replacement.
Recomendado
Educational and Training Platforms
The PIC18LC601-I/PT remains valuable in university microcontroller courses and vendor training programs because it teaches the external-memory interface concept that simpler internal-Flash MCUs hide. Its TQFP-64 package exposes every bus signal, supporting lab exercises that demonstrate the modified Harvard architecture directly. The 25 MHz clock rate is fast enough for real-time signal-processing demonstrations and I/O-handling labs. The PIC18 enhanced instruction set is documented identically to all PIC18 family members, so course materials migrate cleanly to modern Flash parts in the same TQFP-64 footprint for student take-home kits.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para PIC18LC601-I/PT — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | PIC18C601-I/PT | PIC18LC601T-I/PT | PIC18F8723-I/PT | PIC18F8722-I/PT | PIC18F8720-E/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-64 | TQFP-64 - same | TQFP-64 - same | TQFP-64 - same | TQFP-64 - same | TQFP-64 - same |
| Program Memory Type | ROMless (external) | ROMless (external) | ROMless (external) | 128 KB Flash internal | 128 KB Flash internal | 128 KB Flash internal |
| Maximum Clock Speed | 25 MHz | 25 MHz | 25 MHz | 40 MHz | 40 MHz | 40 MHz |
| RAM Size | 1.5 KB | 1.5 KB | 1.5 KB | 3936 bytes | 3936 bytes | 3936 bytes |
| Supply Voltage | LC variant 2.0V-5.5V | C variant 4.5V-5.5V | LC variant 2.0V-5.5V | 2.0V-3.6V (Flash) | 2.0V-3.6V (Flash) | 4.2V-5.5V (Flash) |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +125C (Extended) |
| Lifecycle Status | Obsolete | Obsolete / NRND | Obsolete | Active | Active | Active |
Diferenciadores clave
- ROMless architecture allows field firmware updates by replacing external EPROMs (frente a PIC18F8723-I/PT)
- Low-voltage LC variant supports 2.0V-5.5V operation (frente a PIC18C601-I/PT)
- Same TQFP-64 footprint as modern PIC18F Flash alternatives (frente a PIC18F8723-I/PT)
Notas de diseño
The PIC18LC601-I/PT uses a 64-pin TQFP with 0.5 mm lead pitch. Allocate a footprint with 0.27 mm x 1.5 mm rectangular pads and 0.2 mm solder-mask slivers between pads to prevent solder bridges during reflow. Keep the external memory bus traces (PORTD D0-D7, PORTE control lines) matched within 25 mil to avoid data-setup violations at 25 MHz. Place a 0.1 uF X7R decoupling capacitor within 5 mm of every VDD pin and a 10 uF bulk capacitor at the board entry point.
Because the PIC18LC601-I/PT is ROMless, an external program memory device MUST be wired to the parallel memory bus or the part will not execute code. Verify the /MCLR pull-up resistor is present (10 kohm to VDD) and that the OSC1/OSC2 crystal or external clock meets the 25 MHz maximum datasheet limit. Do not assume the LC variant has the same absolute maximum ratings as the PIC18C601; LC parts have a lower absolute-maximum VDD of 5.5V and lower ESD tolerance.
The TQFP-64 package dissipates up to approximately 1 W in industrial-temperature operation at 25 MHz. With a typical theta_JA of 35-45 C/W on a 2-layer FR4 board, this yields a 35-45 C junction temperature rise above ambient. For closed-enclosure designs without airflow, derate clock frequency to 20 MHz or add a copper-pour thermal pad under the exposed die attach pad if the package supports it (the standard TQFP-64 does not - use TQFP-64 with EP if required).
Información de cumplimiento
RoHS and REACH compliance status not explicitly stated in verified web data; the /PT ordering code suggests Pb-free assembly but formal certificates should be requested from Microchip. Not AEC-Q100 qualified. Industrial temperature grade only.
