PIC18LF248T-I/SO - 8-bit MCU, 16KB Flash, CAN, 28-SOIC
MPN: PIC18LF248T-I/SO ✓ فعالPIC18LF248T-I/SO نمای کلی
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, data memory, peripherals, and I/O into one IC. The PIC18F family uses Microchip's enhanced 8-bit RISC architecture with a 16-bit instruction word and 8-bit data path, providing up to 10 MIPS performance at 40 MHz. PIC18LF248 variants specifically target CAN-enabled embedded applications, placing them in the broader hierarchy of microcontrollers -> 8-bit MCUs -> PIC18 family -> CAN-enabled microcontrollers -> automotive/industrial networking.
Key features of the PIC18LF248T-I/SO include 23 digital I/O pins, an internal 8 MHz oscillator (with PLL support up to 40 MHz), 10-bit ADC with up to 5 channels, two analog comparators, one 8-bit and three 16-bit timers, and an ECAN module supporting CAN 2.0B active. The device also includes USART, SPI, and I2C peripherals for serial communication. Power management features include multiple sleep modes, programmable brown-out reset, and a low-power watchdog timer.
The PIC18LF248 architecture combines Harvard bus separation (separate program and data memory buses) with a 32-level hardware stack and 75 instructions including hardware multiply. The ECAN module supports both standard and extended CAN frames, with configurable acceptance filters and masks for flexible message handling. The device is well-suited for real-time control applications where deterministic interrupt response and CAN bus connectivity are required.
Typical applications include automotive body and chassis networks (CAN nodes), industrial CANopen or DeviceNet nodes, building automation controllers, sensor interfacing with CAN uplink, and embedded control systems requiring CAN bus communication. The 28-pin SOIC package suits through-hole and surface-mount designs in space-constrained layouts.
When designing with the PIC18LF248T-I/SO, ensure decoupling capacitors are placed close to VDD/VSS pairs, and configure the ECAN module properly for your bus topology with appropriate termination. The internal oscillator can reduce BOM cost but external crystal is recommended for CAN applications requiring tight baud-rate tolerance.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
جایگزین‌های drop-in برای PIC18LF248T-I/SO — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
گونه‌ها در این سری
مدل‌های هم‌سری که جایگزین مستقیم هستند برای PIC18LF248T-I/SO (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در Package, Operating Temperature, I/O Pins, ADC, Core Architecture.
PIC18LF248-I/SO
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18LF2480T-I/SO
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18LF2455T-I/SO
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18F248T-I/SO
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18F248-I/SO
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18LF258T-I/SO
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18LF248T-I/SO حداکثر مقادیر مجاز و مشخصات الکتریکی
| Core Architecture | PIC18 (8-bit RISC, enhanced) |
| Program Memory (Flash) | 16 KB (8K x 16 words) |
| Data SRAM | 768 bytes |
| Data EEPROM | 256 bytes |
| Maximum CPU Speed | 40 MHz (10 MIPS) |
| Supply Voltage (VDD) | 2.0 V to 5.5 V |
| دمای کاری | -40 C to +85 C (Industrial) |
| I/O Pins | 23 digital I/O |
| ADC | 10-bit, up to 5 channels |
| Analog Comparators | 2 |
| Timers | 1 x 8-bit, 3 x 16-bit |
| Communication Peripherals | ECAN, USART, SPI, I2C |
| CAN Module | CAN 2.0B active (ECAN) |
| بسته‌بندی | 28-pin SOIC (SO) |
| نوع نصب | Surface Mount |
| سطح MSL | 1 (unlimited) |
| وضعیت RoHS | Compliant |
| Instruction Set | 75 instructions, hardware multiply |
| Stack Levels | 32 hardware |
| Watchdog Timer | Yes (software configurable) |
| Brown-out Reset | Yes (programmable) |
| Internal Oscillator | 8 MHz (PLL up to 40 MHz) |
پیکربندی پین PIC18LF248T-I/SO
| پین 1 | MCLR — Master Clear (Reset) input, active low |
| پین 2 | RA0/AN0 — Digital I/O / Analog input channel 0 |
| پین 3 | RA1/AN1 — Digital I/O / Analog input channel 1 |
| پین 4 | RA2/AN2/VREF- — Digital I/O / Analog input channel 2 / ADC negative reference |
| پین 5 | RA3/AN3/VREF+ — Digital I/O / Analog input channel 3 / ADC positive reference |
| پین 6 | RA4/T0CKI — Digital I/O / Timer 0 clock input |
| پین 7 | RA5/AN4/SS — Digital I/O / Analog input channel 4 / SPI slave select |
| پین 8 | VSS — Ground reference |
| پین 9 | OSC1/RA7 — Oscillator input / Digital I/O |
| پین 10 | OSC2/RA6 — Oscillator output / Digital I/O |
| پین 11 | RC0/T1OSO/T1CKI — Digital I/O / Timer 1 oscillator output / Timer 1 clock input |
| پین 12 | RC1/T1OSI/CCP2 — Digital I/O / Timer 1 oscillator input / CCP2 module |
| پین 13 | RC2/CCP1 — Digital I/O / CCP1 module |
| پین 14 | RC3/SCK/SCL — Digital I/O / SPI clock / I2C clock |
| پین 15 | RC4/SDI/SDA — Digital I/O / SPI data in / I2C data |
| پین 16 | RC5/SDO — Digital I/O / SPI data out |
| پین 17 | RC6/TX/CK — Digital I/O / USART transmit / USART clock |
| پین 18 | RC7/RX/DT — Digital I/O / USART receive / USART data |
| پین 19 | VSS — Ground reference |
| پین 20 | VDD — Positive power supply |
| پین 21 | RB0/INT0 — Digital I/O / External interrupt 0 |
| پین 22 | RB1/INT1 — Digital I/O / External interrupt 1 |
| پین 23 | RB2/INT2/CANTX — Digital I/O / External interrupt 2 / CAN bus transmit |
| پین 24 | RB3/INT3/CANRX — Digital I/O / External interrupt 3 / CAN bus receive |
| پین 25 | RB4/INT4 — Digital I/O / External interrupt 4 |
| پین 26 | RB5/INT5 — Digital I/O / External interrupt 5 |
| پین 27 | RB6/PGC — Digital I/O / ICSP clock |
| پین 28 | RB7/PGD — Digital I/O / ICSP data |
کاربردهای معمول
PIC18LF248T-I/SO مناسب است برای 7 کاربردs: Automotive CAN Bus Nodes, Industrial CANopen / DeviceNet Controllers, Building Automation Controllers, Sensor Interface with CAN Uplink, Embedded CAN-Enabled Control Modules, Medical Device Communication Interfaces, Automotive Aftermarket Accessories.
Automotive CAN Bus Nodes
The PIC18LF248T-I/SO is ideally suited for automotive CAN bus node applications. Its integrated ECAN module supports CAN 2.0B active with both 11-bit and 29-bit identifiers, enabling integration into body controller networks, climate control modules, and infotainment peripherals. The 16KB Flash accommodates typical CAN application firmware stacks, while 768B SRAM provides buffer space for CAN message queues. The 2.0V to 5.5V VDD range supports direct connection to 3.3V CAN transceivers such as MCP2551 or TJA1050, simplifying power architecture in mixed-voltage automotive systems.
پیشنهادی
Industrial CANopen / DeviceNet Controllers
The PIC18LF248T-I/SO serves as a cost-effective controller for industrial CANopen and DeviceNet nodes in factory automation. The 40 MHz CPU speed delivers 10 MIPS, sufficient for protocol stack execution and real-time I/O control. The 23 I/O pins support multiple sensor inputs and actuator outputs, while the integrated 10-bit ADC with 5 channels enables direct analog sensor interfacing. The industrial temperature grade (-40C to +85C) ensures reliable operation in factory floor environments without requiring additional thermal protection.
پیشنهادی
Building Automation Controllers
For building automation applications such as HVAC zone controllers, lighting control modules, and access control panels, the PIC18LF248T-I/SO provides a compact single-chip solution. The ECAN module enables integration into BACnet or KNX-over-CAN building networks, while USART, SPI, and I2C peripherals support sensor and actuator interfaces. The low-power sleep modes extend battery life in wireless or backup-powered subsystems, and the wide VDD range (2.0V to 5.5V) supports both 24VAC-derived and battery-backed power topologies common in building systems.
پیشنهادی
Sensor Interface with CAN Uplink
The PIC18LF248T-I/SO acts as a sensor aggregation node that reads multiple analog or digital sensors and reports data over CAN bus to a central controller. Its 10-bit ADC with 5 input channels handles direct analog sensor connections, while I2C and SPI buses accommodate digital sensors. The ECAN module transmits formatted sensor data frames at standard CAN baud rates (125 kbps, 250 kbps, 500 kbps, 1 Mbps). The 16KB Flash supports sensor calibration data and protocol formatting routines.
پیشنهادی
Embedded CAN-Enabled Control Modules
Custom embedded control systems requiring CAN bus communication benefit from the PIC18LF248T-I/SO's integrated peripheral set and small 28-SOIC footprint. The 23 I/O pins support PWM outputs for motor speed control, digital inputs for limit switches, and analog inputs for position feedback. The 32-level hardware stack enables deep call chains for complex control algorithms. Combined with the 40 MHz CPU speed, the device handles real-time PID control loops while maintaining CAN bus communication.
پیشنهادی
Medical Device Communication Interfaces
Non-critical medical devices requiring reliable communication can leverage the PIC18LF248T-I/SO as a CAN bus interface controller for diagnostic equipment, patient monitors, and laboratory instruments. The industrial temperature range and wide VDD range support diverse medical equipment power environments. The integrated ECAN module provides deterministic communication latency required for medical device synchronization. Note: safety-critical medical applications require IEC 60601 compliance assessment at the system level, not just component selection.
پیشنهادی
Automotive Aftermarket Accessories
Aftermarket automotive accessories such as CAN-bus alarm systems, remote start modules, and trailer brake controllers use the PIC18LF248T-I/SO to interface with the vehicle CAN bus. Its 2.0V to 5.5V VDD range supports direct connection to 12V battery systems via switching regulators, and the ECAN module enables reading vehicle data such as door status, ignition state, and wheel speed. The compact 28-SOIC package suits small enclosure designs typical of aftermarket accessories.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای PIC18LF248T-I/SO — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | PIC18LF248-I/SO | PIC18LF2480T-I/SO | PIC18F248T-I/SO | PIC18LF258T-I/SO |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SOIC | 28-SOIC (tray) | 28-SOIC (T&R) | 28-SOIC (T&R) | 28-SOIC (T&R) |
| Flash Memory | 16 KB | 16 KB | 32 KB | 16 KB | 32 KB |
| SRAM | 768 bytes | 768 bytes | 1024 bytes | 768 bytes | 1536 bytes |
| CAN Module | ECAN 2.0B active | ECAN 2.0B active | ECAN 2.0B active | ECAN 2.0B active | ECAN 2.0B active |
| Operating Voltage | 2.0V to 5.5V | 2.0V to 5.5V | 2.0V to 5.5V | 4.2V to 5.5V | 2.0V to 5.5V |
| Max CPU Speed | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| I/O Pins | 23 | 23 | 23 | 23 | 23 |
| Temperature Grade | -40C to +85C (Industrial) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
تفاوت‌های کلیدی
- Wide 2.0V to 5.5V operating voltage for mixed-voltage designs (در مقابلPIC18F248T-I/SO)
- Integrated ECAN module for automotive and industrial networking (در مقابلPIC18LF2420-I/SO)
- Industrial temperature grade with wide VDD for robust designs (در مقابلPIC18LF2480T-I/SO)
یادداشت‌های طراحی
Place a 0.1 uF decoupling capacitor as close as possible to each VDD/VDDcore pair (pins 20 and 11 for 28-SOIC), and add a bulk 10 uF tantalum or ceramic capacitor near the MCU. The PIC18LF248T-I/SO VDD range of 2.0V to 5.5V allows direct connection to 3.3V CAN transceivers. For battery-backed systems, use the brown-out reset feature configured to the minimum operating voltage (BORV=1 for 2.0V threshold) to prevent undefined operation during voltage dips.
Route the CAN bus differential pair (CANTX/CANRX at pins 23/24 to the MCP2551 or similar transceiver) with controlled impedance and equal trace lengths. Keep CAN traces away from high-frequency switching nodes and digital clock signals. For crystal or resonator connections (OSC1/OSC2 at pins 9/10), keep traces short and surround them with a ground pour to minimize EMI. Place the crystal within 5mm of the MCU to reduce parasitic capacitance and ensure stable oscillation.
When using the internal 8 MHz oscillator with PLL for CAN applications, verify baud rate accuracy against CAN specification requirements (typically +/-0.5% or better for high-speed CAN). For critical timing applications, use an external crystal because the internal oscillator may drift beyond CAN tolerance over temperature and voltage. Also, configure the CAN module's configuration registers (BRGCON1/2/3) correctly before enabling CAN, as incorrect configuration can lock up the ECAN module and require a reset to recover.
The PIC18LF248T-I/SO in 28-SOIC package has typical thermal resistance of approximately 80 C/W (theta_JA) for SOIC packages. At maximum operating current (~25 mA active at 40 MHz, 5.5V), power dissipation is approximately 0.14W, producing a junction temperature rise of about 11C above ambient. This is well within the -40C to +85C operating range, but for elevated temperature environments ensure adequate PCB copper pour for heat dissipation.
اطلاعات انطباق
RoHS compliant per Microchip product page. Standard PIC18LF248T-I/SO is not AEC-Q100 qualified; for automotive safety-critical applications, contact Microchip for the AEC-Q100 qualified variant. Lead-free and halogen-free packaging.
