PIC18LF448-I/L - 8-bit 40MHz MCU 16KB Flash 44-PLCC | Microchip
MPN: PIC18LF448-I/L ✓ Hoạt độngPIC18LF448-I/L Tóm tắt
A PIC microcontroller (Peripheral Interface Controller) is a Harvard-architecture RISC MCU family originally developed by Microchip. Within that taxonomy, the PIC18F line is the high-performance 8-bit tier (16-bit instruction word, 8-bit data path) that adds hardware multiply, C-compiler-friendly architecture, and on-chip peripherals such as CAN, USB, and ADC. The PIC18LF448 sits in the sub-family with on-board CAN 2.0B, making it a fit point between the basic PIC18F442 and the higher-pin PIC18F458.
Key features include 34 digital I/O pins, an internal 10-bit ADC, two analog comparators, a CAN 2.0B controller, two USART modules, a Master SSP (SPI/I2C), three timers and a 10-bit PWM module with capture/compare. Brown-out Reset (BOR), Low-Voltage Detect (LVD), Power-On Reset (POR) and a Watchdog Timer (WDT) give the part fault-recovery capability suitable for industrial control loops and automotive body electronics.
Architecturally, the PIC18LF448 uses a 16-bit instruction path with an 8-bit data bus, 32-level hardware stack, and 8 x 8 hardware multiplier, allowing efficient C code generation. The LF core runs at 10 MHz at 2.0V and 40 MHz at 5V, and the in-circuit serial programming (ICSP) interface permits field firmware updates through just two pins.
Typical applications include CAN-node automotive body modules, HVAC fan controllers, industrial sensor hubs, small motor-control boards and low-power instrumentation nodes. The combination of on-chip CAN, EEPROM and PLCC through-hole package makes the part a long-life-cycle fit for industrial backplanes.
When designing, ensure the CAN bus uses proper 120-ohm termination at each end, place a 100 nF decoupling cap close to each VDD/VSS pair, and keep oscillator traces short. The LF silicon tolerates 2.0V to 5.5V, so a single LDO can power both MCU and 5V sensors. This page combines distributor pricing, drop-in alternative cross-references, and PCB design guidance not bundled in the datasheet PDF.
Bộ thay thế dễ dàng lắp đặt cho PIC18LF448-I/L — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC18LF448-I/L (cùng hình factor và footprint) — khác nhau ở Core Architecture, Mounting Type, Operating Temperature, Package, I/O Pins.
PIC18LF448-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F448-I/L
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F448A-I/L
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18LF458-I/L
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18LF442-I/L
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF448-I/L Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC 8-bit RISC (Harvard) |
| Family | PIC18F |
| Program Memory (Flash) | 16 KB (8K x 16 instructions) |
| Data SRAM | 768 bytes |
| Data EEPROM | 256 bytes |
| Maximum CPU Speed | 40 MHz |
| Operating Voltage Range | 2.0 V to 5.5 V |
| I/O Pins | 34 |
| Timers | 4 (Timer0/1/2/3) |
| Communication | CAN 2.0B, 2x USART, MSSP (SPI/I2C) |
| Comparators | 2 analog comparators |
| Hộp | 44-pin PLCC (16.59 x 16.59 mm) |
| Nhiệt độ hoạt động | -40C to +85C (Industrial) |
| Kiểu lắp đặt | Through-Hole (J-Lead) |
| Programming Interface | ICSP (In-Circuit Serial Programming) |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC18LF448-I/L
| Chân 1 | MCLR — Master Clear (Reset) input, active-low |
| Chân 2 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| Chân 3 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| Chân 4 | RA2/AN2/VREF- — PORTA bit 2 / Analog input 2 / DAC negative reference |
| Chân 5 | RA3/AN3/VREF+ — PORTA bit 3 / Analog input 3 / DAC positive reference |
| Chân 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Chân 7 | RA5/AN4/SS — PORTA bit 5 / Analog input 4 / SPI Slave Select |
| Chân 8 | RE0/RD/AN5 — PORTE bit 0 / Parallel port read / Analog input 5 |
| Chân 9 | RE1/WR/AN6 — PORTE bit 1 / Parallel port write / Analog input 6 |
| Chân 10 | RE2/CS/AN7 — PORTE bit 2 / Parallel port chip select / Analog input 7 |
| Chân 11 | VDD — Positive supply voltage |
| Chân 12 | VSS — Ground reference |
| Chân 13 | OSC1/CLKI — Crystal oscillator input / external clock input |
| Chân 14 | OSC2/CLKO — Crystal oscillator output / clock output |
| Chân 15 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| Chân 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 |
| Chân 17 | RC2/CCP1 — PORTC bit 2 / Capture Compare PWM 1 |
| Chân 18 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Chân 19 | RD0/PSP0/C1IN+ — PORTD bit 0 / Parallel Slave Port data bit / Comparator 1 non-inverting input |
| Chân 20 | RD1/PSP1/C1IN- — PORTD bit 1 / Parallel Slave Port data bit / Comparator 1 inverting input |
| Chân 21 | RD2/PSP2/C2IN+ — PORTD bit 2 / Parallel Slave Port data bit / Comparator 2 non-inverting input |
| Chân 22 | RD3/PSP3/C2IN- — PORTD bit 3 / Parallel Slave Port data bit / Comparator 2 inverting input |
| Chân 23 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Chân 24 | RC5/SDO — PORTC bit 5 / SPI data out |
| Chân 25 | RC6/TX/CK — PORTC bit 6 / USART asynchronous transmit / USART synchronous clock |
| Chân 26 | RC7/RX/DT — PORTC bit 7 / USART asynchronous receive / USART synchronous data |
| Chân 27 | RD4/PSP4 — PORTD bit 4 / Parallel Slave Port data bit |
| Chân 28 | RD5/PSP5/P1B — PORTD bit 5 / Parallel Slave Port data bit / PWM output 1B |
| Chân 29 | RD6/PSP6/P1C — PORTD bit 6 / Parallel Slave Port data bit / PWM output 1C |
| Chân 30 | RD7/PSP7/P1D — PORTD bit 7 / Parallel Slave Port data bit / PWM output 1D |
| Chân 31 | VSS — Ground reference |
| Chân 32 | VDD — Positive supply voltage |
| Chân 33 | RB0/INT0/FLT0 — PORTB bit 0 / External interrupt 0 / PWM fault input |
| Chân 34 | RB1/INT1 — PORTB bit 1 / External interrupt 1 |
| Chân 35 | RB2/INT2/CANTX — PORTB bit 2 / External interrupt 2 / CAN bus transmit |
| Chân 36 | RB3/INT3/CANRX — PORTB bit 3 / External interrupt 3 / CAN bus receive |
| Chân 37 | RB4 — PORTB bit 4 (interrupt-on-change) |
| Chân 38 | RB5 — PORTB bit 5 (interrupt-on-change) |
| Chân 39 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Chân 40 | RB7/PGD — PORTB bit 7 / ICSP data |
| Chân 41 | NC — Not connected (per datasheet) |
| Chân 42 | NC — Not connected (per datasheet) |
| Chân 43 | NC — Not connected (per datasheet) |
| Chân 44 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
PIC18LF448-I/L phù hợp cho 6 Áp dụngs: Automotive CAN Node Body Electronics, Industrial HVAC Fan Controller, Sensor Hub with CAN Bus Aggregation, Small Motor Control Board, Low-Power Instrumentation Node, Industrial Backplane PLCC Module.
Automotive CAN Node Body Electronics
The PIC18LF448-I/L's integrated CAN 2.0B controller supports up to 1 Mbps bit rates, ideal for body-control modules on CAN bus networks. Its 2.0V-5.5V LF supply lets the MCU share a single LDO with 3.3V sensors, while 16 KB of flash covers typical door/seat/lighting logic. Decoupling 100 nF on each VDD pin and a 120-ohm CAN termination keep the bus EMI-compliant.
Được đề xuất
Industrial HVAC Fan Controller
Industrial HVAC controllers benefit from the PIC18LF448-I/L's hardware PWM (10-bit, 2 channels), 10-bit ADC for temperature feedback, and industrial -40C to +85C rating. With 16 KB flash and 768 B SRAM, the MCU can run a closed-loop PID in C while driving TRIAC or IGBT motor drivers via PWM. The 44-pin PLCC through-hole package survives high-vibration environments better than fine-pitch SMD alternatives.
Được đề xuất
Sensor Hub with CAN Bus Aggregation
For aggregating multiple analog/digital sensors onto a CAN bus, the PIC18LF448-I/L offers 34 digital I/O lines plus its 10-bit ADC and MSSP (SPI/I2C) for connecting external sensors. The 256-byte EEPROM allows per-node calibration storage. The LF voltage range lets a single rail power 3.3V sensors and 5V actuators while the MCU arbitrates CAN traffic with built-in acceptance filters.
Được đề xuất
Small Motor Control Board
Stepper and BLDC motor control leverages the PIC18LF448-I/L's three timers, 2-channel 10-bit PWM, and quadrature encoder inputs on the IOC ports. With 40 MHz CPU throughput the part can execute field-oriented control loops up to a few kHz, and the LF silicon runs from 2.0V allowing single-cell Li-ion packs. The PLCC socket footprint enables field-replaceable modules on the production line.
Được đề xuất
Low-Power Instrumentation Node
Battery-powered instrumentation nodes take advantage of the PIC18LF448-I/L's 2.0V minimum VDD, allowing two AA cells or a single Li-ion cell. The integrated USART plus MSSP enables wired or wireless link layers via low-power RF transceivers, and the BOR/LVD/POR/WDT safety chain provides graceful brown-out recovery for unattended sensor installations.
Được đề xuất
Industrial Backplane PLCC Module
PLCC through-hole sockets remain popular in industrial backplanes where field-replaceable modules reduce MTTR. The PIC18LF448-I/L's 44-pin PLCC can be inserted in a low-cost IC socket, and its CAN or USART ports bridge to the backplane bus. With 100K flash endurance and -40C to +85C industrial rating, the part supports decades-long industrial lifetimes typical of building automation and process control.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18LF448-I/L — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | PIC18LF448-I/PT | PIC18F448-I/L | PIC18F448A-I/L | PIC18LF458-I/L | PIC18LF442-I/L |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-pin PLCC (16.59 x 16.59 mm) | 44-pin TQFP (SMD) | 44-pin PLCC - same | 44-pin PLCC - same | 44-pin PLCC - same | 44-pin PLCC - same |
| Flash Memory | 16 KB | 16 KB | 16 KB | 16 KB | 32 KB | 16 KB |
| SRAM | 768 bytes | 768 bytes | 768 bytes | 768 bytes | 1536 bytes | 768 bytes |
| CAN Controller | Yes (CAN 2.0B) | Yes | Yes | Yes | Yes | No |
| Operating Voltage | 2.0V to 5.5V | 2.0V to 5.5V | 4.2V to 5.5V | 4.2V to 5.5V | 2.0V to 5.5V | 2.0V to 5.5V |
| Maximum CPU Clock | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| I/O Pins | 34 | 34 | 34 | 34 | 34 | 34 |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Bảo phân biệt quan trọng
- Integrated CAN 2.0B controller in a 44-pin PLCC footprint (vsPIC18LF442-I/L)
- Wide 2.0V to 5.5V LF voltage range versus standard 4.2V to 5.5V F-range parts (vsPIC18F448-I/L)
- Drop-in pin compatibility with both PLCC through-hole and TQFP SMD packages (vsPIC18LF448-I/PT)
Ghi chú thiết kế
Place a 100 nF ceramic decoupling capacitor within 5 mm of each VDD/VSS pair (pins 11/12 and 31/32) and a single bulk 10 uF tantalum or ceramic at the package entry. The LF silicon draws approximately 16 mA at 40 MHz/5V, so a 100 mA LDO is sufficient; for battery applications pair with an MCP1700 LDO for sub-microamp quiescent current.
Keep the crystal traces between pins 13 (OSC1) and 14 (OSC2) short and symmetric. Guard the crystal with a ground ring and avoid routing signal traces under it. For CAN pins 35 (CANTX) and 36 (CANRX), route a differential pair to the MCP2551 transceiver with 120-ohm characteristic impedance and place the 120-ohm termination resistor within 10 mm of each bus end.
Configuration bits must be programmed to enable the internal oscillator or to specify the external clock range - leaving them at the default (HS oscillator) on the LF variant can prevent startup below 2.0V. Also verify the BOR is enabled for the application supply range; the LF silicon supports BOR voltages down to 2.0V but requires the LBOR fuse correctly set.
Thông tin tuân thủ
RoHS compliance per Microchip product page. The 'I' industrial temperature grade (-40C to +85C) is rated for industrial environments but is not AEC-Q100 qualified; for AEC-Q100 automotive use, choose the PIC18F458 or PIC18F448A with 'E' extended temperature grade.
