PIC18LF448-I/L - 8-bit 40MHz MCU 16KB Flash 44-PLCC | Microchip
MPN: PIC18LF448-I/L ✓ NakahandaPIC18LF448-I/L Ulas
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.
Mga alternatibo na pwedeng ilagay na PIC18LF448-I/L — parehas na package, pin-to-pin na katugmang. Hindi kasama ang mga bahagi ng iba't-ibang package na nangangailangan ng pagpapaayos ng PCB.
Variante sa Seri na ito
Katulad na modelo sa serye na katugma sa pagpasok PIC18LF448-I/L (parehas na form factor at footprint) — pagkakaiba sa Core Architecture, Mounting Type, Operating Temperature, Package, I/O Pins.
PIC18LF448-I/PT
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →PIC18F448-I/L
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →PIC18F448A-I/L
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
PIC18LF458-I/L
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
PIC18LF442-I/L
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →PIC18LF448-I/L Mga Pinakamataas na Rating at Electrical Characteristics
| 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 |
| Packhaging | 44-pin PLCC (16.59 x 16.59 mm) |
| Temperature na Operasyon | -40C to +85C (Industrial) |
| Uri ng Pagpapasok | Through-Hole (J-Lead) |
| Programming Interface | ICSP (In-Circuit Serial Programming) |
| Tindminan RoHS | Compliant |
Pin Configuration ng PIC18LF448-I/L
| Pin 1 | MCLR — Master Clear (Reset) input, active-low |
| Pin 2 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| Pin 3 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| Pin 4 | RA2/AN2/VREF- — PORTA bit 2 / Analog input 2 / DAC negative reference |
| Pin 5 | RA3/AN3/VREF+ — PORTA bit 3 / Analog input 3 / DAC positive reference |
| Pin 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Pin 7 | RA5/AN4/SS — PORTA bit 5 / Analog input 4 / SPI Slave Select |
| Pin 8 | RE0/RD/AN5 — PORTE bit 0 / Parallel port read / Analog input 5 |
| Pin 9 | RE1/WR/AN6 — PORTE bit 1 / Parallel port write / Analog input 6 |
| Pin 10 | RE2/CS/AN7 — PORTE bit 2 / Parallel port chip select / Analog input 7 |
| Pin 11 | VDD — Positive supply voltage |
| Pin 12 | VSS — Ground reference |
| Pin 13 | OSC1/CLKI — Crystal oscillator input / external clock input |
| Pin 14 | OSC2/CLKO — Crystal oscillator output / clock output |
| Pin 15 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| Pin 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 |
| Pin 17 | RC2/CCP1 — PORTC bit 2 / Capture Compare PWM 1 |
| Pin 18 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Pin 19 | RD0/PSP0/C1IN+ — PORTD bit 0 / Parallel Slave Port data bit / Comparator 1 non-inverting input |
| Pin 20 | RD1/PSP1/C1IN- — PORTD bit 1 / Parallel Slave Port data bit / Comparator 1 inverting input |
| Pin 21 | RD2/PSP2/C2IN+ — PORTD bit 2 / Parallel Slave Port data bit / Comparator 2 non-inverting input |
| Pin 22 | RD3/PSP3/C2IN- — PORTD bit 3 / Parallel Slave Port data bit / Comparator 2 inverting input |
| Pin 23 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Pin 24 | RC5/SDO — PORTC bit 5 / SPI data out |
| Pin 25 | RC6/TX/CK — PORTC bit 6 / USART asynchronous transmit / USART synchronous clock |
| Pin 26 | RC7/RX/DT — PORTC bit 7 / USART asynchronous receive / USART synchronous data |
| Pin 27 | RD4/PSP4 — PORTD bit 4 / Parallel Slave Port data bit |
| Pin 28 | RD5/PSP5/P1B — PORTD bit 5 / Parallel Slave Port data bit / PWM output 1B |
| Pin 29 | RD6/PSP6/P1C — PORTD bit 6 / Parallel Slave Port data bit / PWM output 1C |
| Pin 30 | RD7/PSP7/P1D — PORTD bit 7 / Parallel Slave Port data bit / PWM output 1D |
| Pin 31 | VSS — Ground reference |
| Pin 32 | VDD — Positive supply voltage |
| Pin 33 | RB0/INT0/FLT0 — PORTB bit 0 / External interrupt 0 / PWM fault input |
| Pin 34 | RB1/INT1 — PORTB bit 1 / External interrupt 1 |
| Pin 35 | RB2/INT2/CANTX — PORTB bit 2 / External interrupt 2 / CAN bus transmit |
| Pin 36 | RB3/INT3/CANRX — PORTB bit 3 / External interrupt 3 / CAN bus receive |
| Pin 37 | RB4 — PORTB bit 4 (interrupt-on-change) |
| Pin 38 | RB5 — PORTB bit 5 (interrupt-on-change) |
| Pin 39 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Pin 40 | RB7/PGD — PORTB bit 7 / ICSP data |
| Pin 41 | NC — Not connected (per datasheet) |
| Pin 42 | NC — Not connected (per datasheet) |
| Pin 43 | NC — Not connected (per datasheet) |
| Pin 44 | NC — Not connected (per datasheet) |
Tipikal na mga Gamit
PIC18LF448-I/L ay nararapat para sa 6 aplikasyons: 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.
Inirekomenda
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.
Inirekomenda
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.
Inirekomenda
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.
Inirekomenda
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.
Inirekomenda
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.
Inirekomenda
Buod ng mga Inirekomendang Produkto
Impormasyon ng Talumpati sa Engineering for PIC18LF448-I/L — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto | 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 |
Pangunahing mga Pagkakaiba
- Integrated CAN 2.0B controller in a 44-pin PLCC footprint (kumpara saPIC18LF442-I/L)
- Wide 2.0V to 5.5V LF voltage range versus standard 4.2V to 5.5V F-range parts (kumpara saPIC18F448-I/L)
- Drop-in pin compatibility with both PLCC through-hole and TQFP SMD packages (kumpara saPIC18LF448-I/PT)
Talaan ng Disenyo
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.
Impormasyon ng Pagsunod sa Kautusan
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.
