PIC18LF248T-I/SO - 8-bit MCU, 16KB Flash, CAN, 28-SOIC
MPN： PIC18LF248T-I/SO ✓ 啟用中PIC18LF248T-I/SO 概覽
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.
直接替換替代品，適用於 PIC18LF248T-I/SO — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： PIC18LF248T-I/SO （相同外形與佔位） — 差異在於 Package, Operating Temperature, I/O Pins, ADC, Core Architecture.
PIC18LF248-I/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC18LF2480T-I/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC18LF2455T-I/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC18F248T-I/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC18F248-I/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC18LF258T-I/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC18LF248T-I/SO 最大額定值與電氣特性
| 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 |
| 工作溫度 | -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) |
| 封裝 | 28-pin SOIC (SO) |
| 安裝類型 | Surface Mount |
| MSL 等級 | 1 (unlimited) |
| RoHS 狀態 | 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) |
PIC18LF248T-I/SO 腳位配置
| 腳位 1 | MCLR — Master Clear (Reset) input, active low |
| 腳位 2 | RA0/AN0 — Digital I/O / Analog input channel 0 |
| 腳位 3 | RA1/AN1 — Digital I/O / Analog input channel 1 |
| 腳位 4 | RA2/AN2/VREF- — Digital I/O / Analog input channel 2 / ADC negative reference |
| 腳位 5 | RA3/AN3/VREF+ — Digital I/O / Analog input channel 3 / ADC positive reference |
| 腳位 6 | RA4/T0CKI — Digital I/O / Timer 0 clock input |
| 腳位 7 | RA5/AN4/SS — Digital I/O / Analog input channel 4 / SPI slave select |
| 腳位 8 | VSS — Ground reference |
| 腳位 9 | OSC1/RA7 — Oscillator input / Digital I/O |
| 腳位 10 | OSC2/RA6 — Oscillator output / Digital I/O |
| 腳位 11 | RC0/T1OSO/T1CKI — Digital I/O / Timer 1 oscillator output / Timer 1 clock input |
| 腳位 12 | RC1/T1OSI/CCP2 — Digital I/O / Timer 1 oscillator input / CCP2 module |
| 腳位 13 | RC2/CCP1 — Digital I/O / CCP1 module |
| 腳位 14 | RC3/SCK/SCL — Digital I/O / SPI clock / I2C clock |
| 腳位 15 | RC4/SDI/SDA — Digital I/O / SPI data in / I2C data |
| 腳位 16 | RC5/SDO — Digital I/O / SPI data out |
| 腳位 17 | RC6/TX/CK — Digital I/O / USART transmit / USART clock |
| 腳位 18 | RC7/RX/DT — Digital I/O / USART receive / USART data |
| 腳位 19 | VSS — Ground reference |
| 腳位 20 | VDD — Positive power supply |
| 腳位 21 | RB0/INT0 — Digital I/O / External interrupt 0 |
| 腳位 22 | RB1/INT1 — Digital I/O / External interrupt 1 |
| 腳位 23 | RB2/INT2/CANTX — Digital I/O / External interrupt 2 / CAN bus transmit |
| 腳位 24 | RB3/INT3/CANRX — Digital I/O / External interrupt 3 / CAN bus receive |
| 腳位 25 | RB4/INT4 — Digital I/O / External interrupt 4 |
| 腳位 26 | RB5/INT5 — Digital I/O / External interrupt 5 |
| 腳位 27 | RB6/PGC — Digital I/O / ICSP clock |
| 腳位 28 | RB7/PGD — Digital I/O / ICSP data |
典型應用
PIC18LF248T-I/SO 適用於 7 應用s: 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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
推薦產品摘要
工程參考資料，適用於 PIC18LF248T-I/SO — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | 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 |
主要差異化特點
- Wide 2.0V to 5.5V operating voltage for mixed-voltage designs (對比PIC18F248T-I/SO)
- Integrated ECAN module for automotive and industrial networking (對比PIC18LF2420-I/SO)
- Industrial temperature grade with wide VDD for robust designs (對比PIC18LF2480T-I/SO)
設計說明
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.
合規資訊
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.
