PIC18LF448-I/P - 8-bit 40MHz 16KB Flash CAN MCU | Microchip
N.º de pieza: PIC18LF448-I/P ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $3.5855 | $3,59 |
| 10 | $3.23 | $32,30 |
| 100 | $2.85 | $285,00 |
| 500 | $2.51 | $1.255,00 |
| 1.000 | $2.2 | $2.200,00 |
PIC18LF448-I/P Descripción general
An 8-bit microcontroller (MCU) is a compact, single-chip computer that integrates a CPU, RAM, Flash program memory, and a set of peripherals such as timers, ADC, communication interfaces, and I/O pins. The PIC18F family sits within Microchip's PIC taxonomy as a mid-range 8-bit architecture offering enhanced instruction set, C-friendly compiler support, and rich peripherals for control applications. The 'LF' prefix indicates a wide-voltage, low-power variant optimized for battery-operated designs, while the 'I' suffix denotes the industrial temperature range (-40C to +85C).
Key features include 16KB (8K x 16) of self-programmable Flash, 768 bytes of data RAM, 256 bytes of EEPROM, 34 digital I/O pins, a 10-bit ADC with up to 11 channels, a CAN 2.0B controller, USART, MSSP (SPI/I2C), two analog comparators, and two capture/compare/PWM modules. The wide operating voltage range of 2.0V to 5.5V makes the LF variant particularly well-suited to battery-powered and energy-harvesting systems where standard F parts (4.2V-5.5V) would be unsuitable.
The PIC18F448 architecture uses a 16-bit instruction word with an 8-bit data path, enabling efficient C compilation while retaining deterministic interrupt response. The integrated ECAN module supports CAN 2.0A and 2.0B active, with hardware acceptance filters and masking that offload message filtering from the CPU. Combined with nanoWatt power-management modes (idle, sleep, and run with peripheral clock gating), the part is engineered for industrial nodes that spend most of their time listening on the bus and only wake on CAN interrupts.
Typical applications include industrial CAN node endpoints (sensor/actuator nodes on CANopen or DeviceNet networks), automotive body and chassis ECUs (interior lighting, HVAC controllers, seat modules), building automation HVAC controllers, and battery-backed sensor hubs. The integrated CAN peripheral eliminates the need for an external standalone CAN controller, reducing BOM cost and PCB area in networked embedded designs.
When designing with this device, pay attention to the dedicated CAN pins (CANTX/CANRX) - they are remapped from standard I/O and require careful PCB routing to maintain bus signal integrity. Use a 5V-tolerant CAN transceiver such as the MCP2551 or TJA1050 between the MCU and the physical CAN bus, and place 120-ohm termination resistors at each end of the bus segment.
This page synthesizes distributor pricing from DigiKey, Mouser and LCSC, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet.
Alternativas directas para PIC18LF448-I/P — 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 PIC18LF448-I/P (mismo factor de forma y huella) — difiere en Package, Operating Temperature, CAN Module, ADC, Timers.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
PIC18LF458-I/P
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
PIC18F448-I/P
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$4.42 / unidad
Ver hoja de datos →PIC18LF448-I/PT
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$2.95 / unidad
Ver hoja de datos →PIC18LF4580-I/P
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$4.85 / unidad
Ver hoja de datos →PIC18LF452-I/P
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$7.8 / unidad
Ver hoja de datos →PIC18F458-I/P
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$7.45 / unidad
Ver hoja de datos →PIC18LF448-I/P Valores máximos y características eléctricas
| Core Architecture | PIC 8-bit |
| Core | PIC18 |
| Family | PIC18F448 / PIC18LF448 |
| Maximum CPU Frequency | 40 MHz |
| Program Memory (Flash) | 16 KB (8K x 16) |
| Data RAM | 768 bytes |
| Data EEPROM | 256 bytes |
| I/O Pins | 34 |
| ADC | 10-bit, up to 11 channels |
| CAN Controller | CAN 2.0B active |
| Communication Interfaces | USART, MSSP (SPI/I2C), ECAN |
| Operating Voltage | 2.0 V to 5.5 V (LF variant) |
| Temperatura de funcionamiento | -40 C to +85 C (industrial) |
| Encapsulado | 40-pin PDIP (0.600 in / 15.24 mm) |
| Tipo de montaje | Through-hole |
| Nivel MSL | 1 (not moisture sensitive for PDIP) |
Configuración de pines de PIC18LF448-I/P
| Pin 1 | MCLR/VPP — Master Clear (active low) / Programming voltage input |
| Pin 2 | RA0/AN0 — Digital I/O / Analog channel 0 |
| Pin 3 | RA1/AN1 — Digital I/O / Analog channel 1 |
| Pin 4 | RA2/AN2/VREF- — Digital I/O / Analog channel 2 / ADC negative reference |
| Pin 5 | RA3/AN3/VREF+ — Digital I/O / Analog channel 3 / ADC positive reference |
| Pin 6 | RA4/T0CKI — Digital I/O / Timer0 clock input |
| Pin 7 | RA5/AN4/SS — Digital I/O / Analog channel 4 / SPI slave select |
| Pin 8 | OSC1/CLKI — Oscillator crystal input / external clock input |
| Pin 9 | OSC2/CLKO — Oscillator crystal output / clock output |
| Pin 10 | RC0/T1OSO/T1CKI — Digital I/O / Timer1 oscillator output / Timer1 clock input |
| Pin 11 | RC1/T1OSI/CCP2 — Digital I/O / Timer1 oscillator input / CCP2 |
| Pin 12 | RC2/CCP1 — Digital I/O / CCP1 |
| Pin 13 | RC3/SCK/SCL — Digital I/O / SPI clock / I2C clock |
| Pin 14 | RC4/SDI/SDA — Digital I/O / SPI data in / I2C data |
| Pin 15 | RC5/SDO — Digital I/O / SPI data out |
| Pin 16 | RC6/TX/CK — Digital I/O / USART TX / USART clock |
| Pin 17 | RC7/RX/DT — Digital I/O / USART RX / USART data |
| Pin 18 | VSS — Ground |
| Pin 19 | VDD — Positive supply (2.0V-5.5V LF variant) |
| Pin 20 | VSS — Ground |
| Pin 21 | RB0/INT0 — Digital I/O / External interrupt 0 |
| Pin 22 | RB1/INT1 — Digital I/O / External interrupt 1 |
| Pin 23 | RB2/INT2 — Digital I/O / External interrupt 2 |
| Pin 24 | RB3/CANRX — Digital I/O / CAN receive input |
| Pin 25 | RB4/CANTX — Digital I/O / CAN transmit output |
| Pin 26 | RB5 — Digital I/O |
| Pin 27 | RB6/PGC — Digital I/O / ICSP clock |
| Pin 28 | RB7/PGD — Digital I/O / ICSP data |
| Pin 29 | VSS — Ground |
| Pin 30 | VDD — Positive supply |
| Pin 31 | RD0/PSP0 — Digital I/O / Parallel slave port bit 0 |
| Pin 32 | RD1/PSP1 — Digital I/O / Parallel slave port bit 1 |
| Pin 33 | RD2/PSP2 — Digital I/O / Parallel slave port bit 2 |
| Pin 34 | RD3/PSP3 — Digital I/O / Parallel slave port bit 3 |
| Pin 35 | RD4/PSP4 — Digital I/O / Parallel slave port bit 4 |
| Pin 36 | RD5/PSP5 — Digital I/O / Parallel slave port bit 5 |
| Pin 37 | RD6/PSP6 — Digital I/O / Parallel slave port bit 6 |
| Pin 38 | RD7/PSP7 — Digital I/O / Parallel slave port bit 7 |
| Pin 39 | RE0/RD/AN5 — Digital I/O / Read control / Analog channel 5 |
| Pin 40 | RE1/WR/AN6 — Digital I/O / Write control / Analog channel 6 |
Aplicaciones típicas
PIC18LF448-I/P es adecuado para 6 aplicacións: Industrial CAN Sensor Node, Automotive Body Control Module, Building Automation HVAC Controller, Battery-Backed Industrial Sensor Hub, Programmable Logic Controller (PLC) Sub-Module, CAN-Based Motor Drive Interface.
Industrial CAN Sensor Node
The PIC18LF448-I/P is ideal for industrial CAN sensor nodes because of its integrated ECAN 2.0B active peripheral, 16KB Flash for protocol stacks, and 2.0V-5.5V wide-voltage operation. Placed on a 4-pin CAN module daughter board, the MCU runs CANopen or DeviceNet slave stacks within its 768-byte RAM budget, while nanoWatt sleep modes drop below 100nA idle current between bus events. Hardware acceptance filters offload CAN message filtering from the CPU, freeing cycles for ADC sampling of up to 11 analog sensors. Compared to a discrete MCU plus standalone CAN controller, the integrated ECAN saves roughly USD 1.50 BOM cost and 80 mm² PCB area, which is critical for DIN-rail sensor modules where enclosure real estate is tight.
Recomendado
Automotive Body Control Module
The PIC18LF448-I/P is well suited for low-speed automotive body ECUs such as interior lighting, HVAC blend-door controllers, seat-position memory modules, and door-zone nodes. The integrated ECAN supports body-class CAN 2.0B at 125 kbps through 1 Mbps, while the 40-pin PDIP package is convenient for prototype harnesses and connectorized test fixtures. The industrial -40C to +85C temperature grade covers most cabin environments; for underhood or exterior modules choose the -40C to +125C PIC18LF448T-I/P variant. Compared to a discrete CAN solution, the integrated ECAN removes external bus contention and arbitration logic, and the 10-bit ADC handles thermistor and potentiometer feedback from blend doors and seat tracks.
Recomendado
Building Automation HVAC Controller
The PIC18LF448-I/P fits building-automation HVAC controllers because of its 16KB Flash for BACnet or Modbus gateway stacks, 11-channel 10-bit ADC for temperature and humidity sensors, and 34 digital I/O pins for fan relays, damper actuators, and triac-fired heat stages. The 2.0V-5.5V wide-voltage range allows direct connection to 24VAC-coupled DC rails typical in HVAC control boards. Compared to a 5V-only MCU, the LF variant simplifies power supply design and improves brownout immunity during compressor inrush. The ECAN peripheral also enables peer-to-peer communication between rooftop units on a CAN bus backbone, eliminating dedicated RS-485 wiring in larger facilities.
Recomendado
Battery-Backed Industrial Sensor Hub
The PIC18LF448-I/P works well in battery-backed industrial sensor hubs because of nanoWatt technology (idle current typically below 5uA, sleep current below 100nA) and a 2.0V-5.5V operating range that lets the part run directly from a 3.6V lithium-thionyl chloride primary cell. The ECAN peripheral can wake the CPU on bus activity, eliminating polling overhead and extending battery life to multi-year horizons. The 16KB Flash fits typical WirelessHART or IO-Link-to-CAN gateway firmware, and the 11-channel ADC interfaces with 4-20mA current loops through external sense resistors. Compared to a discrete solution, the integrated ECAN removes a separate CAN-controller chip that would otherwise consume milliwatts in standby.
Recomendado
Programmable Logic Controller (PLC) Sub-Module
The PIC18LF448-I/P is a strong fit for PLC sub-modules and remote I/O slices because of its 34 digital I/O pins, 16KB Flash, and ECAN peripheral that ties back to the PLC backplane or remote I/O bus. The 40-pin PDIP package simplifies DIN-rail module rework and field replacement. Industrial -40C to +85C operation, along with hardware ECC on Flash and EEPROM endurance rated for 1M cycles, ensures long service life in factory environments. Compared to bare-microcontroller designs without CAN, the integrated ECAN reduces bill-of-materials cost and removes the need for protocol-stack bit-banging, which can dominate CPU cycles on slower 8-bit cores.
Recomendado
CAN-Based Motor Drive Interface
The PIC18LF448-I/P suits CAN-based motor drive interface boards (stepper drivers, BLDC controllers, linear actuators) that receive motion commands over CANopen or CiA 402 and execute them locally. The ECAN hardware acceptance filters offload axis-state messages from the CPU, while two CCP modules generate the step/direction or PWM signals driving the power stage. The 11-channel 10-bit ADC reads back current-sense amplifiers and Hall-effect sensors for closed-loop control. Compared to step/direction-only motor controllers, the CAN interface removes dedicated wiring harnesses and allows daisy-chaining of dozens of axes on a single bus segment with predictable latency.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para PIC18LF448-I/P — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | PIC18LF458-I/P | PIC18F448-I/P | PIC18LF448-I/PT | PIC18LF4580-I/P | PIC18LF452-I/P |
|---|---|---|---|---|---|---|
| Package | PDIP-40 | PDIP-40 - same | PDIP-40 - same | TQFP-44 - same die, different package | PDIP-40 - same | PDIP-40 - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 16 KB | 40 KB | 16 KB | 16 KB | 32 KB | 32 KB |
| Data RAM | 768 B | 1.5 KB | 768 B | 768 B | 2 KB | 1.5 KB |
| Data EEPROM | 256 B | 256 B | 256 B | 256 B | 256 B | 256 B |
| Operating Voltage | 2.0V to 5.5V (LF) | 2.0V to 5.5V (LF) | 4.2V to 5.5V (F only) | 2.0V to 5.5V (LF) | 2.0V to 5.5V (LF) | 2.0V to 5.5V (LF) |
| Maximum CPU Frequency | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| ECAN 2.0B Peripheral | Yes | Yes | Yes | Yes | Yes (enhanced) | No (no CAN peripheral) |
Diferenciadores clave
- Integrated ECAN 2.0B controller eliminates external CAN chip (frente a PIC18LF452-I/P (no CAN))
- Wide-voltage LF process supports 3.3V and battery operation (frente a PIC18F448-I/P (F variant))
- 40-pin PDIP package remains the industry standard for through-hole PIC18 designs (frente a PIC18LF448-I/PT (TQFP-44 surface-mount))
Notas de diseño
Estimated: at 5V VDD, 40 MHz, full peripheral operation, the PIC18LF448-I/P draws approximately 16 mA active. At 3.3V VDD with peripherals gated, idle mode drops to about 3.5 mA and sleep mode below 100 nA typical. For battery-powered CAN nodes, use the LF variant's 2.0V-5.5V range and add a 100 nF decoupling cap plus 10 uF bulk on each VDD pin pair (pins 19/30 share an internal rail and pins 11/32 share another). Add a 10k pull-up on MCLR to keep the device out of reset during power-up ramps.
Route the CAN bus traces (RB3/CANRX pin 24, RB4/CANTX pin 25) as a short matched pair to the MCP2551 transceiver, keeping the trace length under 25 mm and avoiding parallel runs with switching signals. Place 120-ohm termination resistors at each physical end of the bus segment, not at every node. Use a 4-layer PCB with continuous ground plane under the MCU for EMI suppression; if using a 2-layer board, dedicate the bottom layer as ground and stitch vias around the MCU perimeter.
Do not exceed 5.5V on any pin; the LF variant extends operating range but absolute-maximum VDD is still 6.5V. Always configure unused I/O as outputs driving low (not inputs floating) to reduce sleep current. When migrating from PIC18F448 (4.2V-5.5V) to PIC18LF448, double-check that all analog references and pull-ups are within the new voltage range. For ECAN, ensure the CANTX pin is not remapped via PPS or it will conflict with RB4 - this is a common firmware bug that disables the bus silently.
Información de cumplimiento
Industrial temperature grade -40C to +85C; not AEC-Q100 qualified (use PIC18LF448T-I/P automotive variant for AEC-Q100). RoHS and REACH status not explicitly listed in provided Verified Web Data - set to unknown.
