PIC18F448-I/PT - 8-bit MCU 16KB Flash 44-TQFP | Microchip
MPN: PIC18F448-I/PT ✓ فعالPIC18F448-I/PT نمای کلی
A PIC18 microcontroller is an 8-bit Reduced Instruction Set Computer (RISC) core in the broader category of microcontrollers (MCU), which sit under embedded computing in the semiconductor hierarchy (MCU -> microcontroller -> embedded IC -> semiconductor). The PIC18F family adds enhanced 16-bit instruction words and 8-bit data paths, advanced peripherals, and C-friendly architecture to the legacy PIC16 line, retaining pin-to-pin compatibility with earlier PIC designs while boosting performance up to 10 MIPS at 40 MHz.
Key features include 16 KB Flash with self-programmability, 768 bytes SRAM, 256 bytes EEPROM, 34 digital I/O pins, an enhanced CAN module (ECAN), a 10-bit ADC with up to 8 channels, two 8-bit and three 16-bit timers, two analog comparators, and the nanoWatt power-managed sleep/Idle modes. The CAN peripheral is the primary differentiator versus standard PIC18F452 parts, enabling networked embedded designs.
The PIC18F448 uses a Harvard bus architecture with separate program and data paths, a hardware multiplier (8x8 in one cycle), and an 8-level deep hardware stack supporting interrupt priority. The CAN engine implements CAN 2.0B with acceptance filters, while the 10-bit ADC supports both single-ended and differential conversion modes.
Typical applications include industrial automation (CAN-bus sensor nodes), automotive body controllers, HVAC controls, smart sensors with CAN connectivity, and CAN-to-UART bridges. The 44-TQFP footprint provides 34 I/O pins for user interfaces while maintaining a compact 10x10 mm outline.
When designing with this part, allocate the oscillator configuration and CAN bit-timing registers carefully, since misconfigured CAN timing is a common cause of bus-off errors. In-circuit serial programming (ICSP) via PGC/PGD pins must be reserved for programming and debug, even in production boards.
This page consolidates distributor pricing (DigiKey, Mouser, Heisener, FindMyChip), drop-in alternatives (PIC18F448-E/PT, PIC18F458-I/PT, PIC18F4480-I/PT), and design notes not present in the manufacturer datasheet.
جایگزین‌های drop-in برای PIC18F448-I/PT — 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 PIC18F448-I/PT (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در Package, Operating Temperature, ADC, Core Architecture, Timers.
PIC18F458-I/PT
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
PIC18F448-E/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18F4480-I/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18F4480T-I/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18F442-I/P
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18F4423T-I/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18F448-I/PT حداکثر مقادیر مجاز و مشخصات الکتریکی
| Core | PIC18 8-bit RISC |
| Program Memory | 16 KB Flash (8K x 16) |
| SRAM | 768 bytes |
| EEPROM | 256 bytes |
| Maximum CPU Speed | 40 MHz (10 MIPS) |
| Supply Voltage (VDD) | 4.2 V to 5.5 V |
| I/O Pins | 34 |
| ADC | 10-bit, 8 channels |
| Comparators | 2 analog |
| Timers | 2 x 8-bit, 3 x 16-bit |
| Communication | CAN (ECAN), I2C, SPI, UART/USART |
| CAN Module | ECAN 2.0B |
| دمای کاری | -40C to +85C (Industrial, -I) |
| بسته‌بندی | 44-pin TQFP (10x10 mm) |
| نوع نصب | Surface Mount |
| سطح MSL | 3 (168 hours) |
| وضعیت RoHS | Compliant |
| Lead-Free | Yes |
| ICSP Programming | PGC/PGD (2-wire) |
پیکربندی پین PIC18F448-I/PT
| پین 1 | RC7/RX1/DT1 — Digital I/O / EUSART1 RX / I2C data |
| پین 2 | RC6/TX1/CK1 — Digital I/O / EUSART1 TX / I2C clock |
| پین 3 | RC5/SDO — Digital I/O / SPI data out |
| پین 4 | RC4/SDI/SDA — Digital I/O / SPI data in / I2C data |
| پین 5 | RC3/SCK/SCL — Digital I/O / SPI clock / I2C clock |
| پین 6 | RC2/CCP1 — Digital I/O / Capture/Compare/PWM1 |
| پین 7 | RC1/CCP2 — Digital I/O / Capture/Compare/PWM2 |
| پین 8 | RC0/T1OSO/T1CKI — Digital I/O / Timer1 oscillator out |
| پین 9 | OSC1/CLKI — Crystal oscillator input |
| پین 10 | OSC2/CLKO — Crystal oscillator output |
| پین 11 | VSS — Ground |
| پین 12 | RA0/AN0 — Digital I/O / Analog input 0 |
| پین 13 | RA1/AN1 — Digital I/O / Analog input 1 |
| پین 14 | RA2/AN2/VREF- — Digital I/O / Analog input 2 / VREF- |
| پین 15 | RA3/AN3/VREF+ — Digital I/O / Analog input 3 / VREF+ |
| پین 16 | RA4/T0CKI — Digital I/O / Timer0 clock |
| پین 17 | RA5/AN4/SS — Digital I/O / Analog input 4 / SPI slave select |
| پین 18 | RE0/RD/AN5 — Digital I/O / Parallel port read / Analog input 5 |
| پین 19 | RE1/WR/AN6 — Digital I/O / Parallel port write / Analog input 6 |
| پین 20 | VSS — Ground |
| پین 21 | RA7 — Digital I/O |
| پین 22 | RE2/CS/AN7 — Digital I/O / Parallel port chip select / Analog input 7 |
| پین 23 | VDD — Positive supply (4.2V-5.5V) |
| پین 24 | RB0/INT0/FLT0 — Digital I/O / External interrupt 0 / PWM fault |
| پین 25 | RB1/INT1 — Digital I/O / External interrupt 1 |
| پین 26 | RB2/INT2/CANTX — Digital I/O / External interrupt 2 / CAN TX |
| پین 27 | RB3/INT3/CANRX — Digital I/O / External interrupt 3 / CAN RX |
| پین 28 | RB4 — Digital I/O |
| پین 29 | RB5 — Digital I/O |
| پین 30 | RB6/PGC — Digital I/O / ICSP clock (programming) |
| پین 31 | RB7/PGD — Digital I/O / ICSP data (programming) |
| پین 32 | VDD — Positive supply (4.2V-5.5V) |
| پین 33 | RD0/PSP0/C1IN+ — Digital I/O / Parallel port / Comparator1 input+ |
| پین 34 | RD1/PSP1/C1IN- — Digital I/O / Parallel port / Comparator1 input- |
| پین 35 | RD2/PSP2/C2IN+ — Digital I/O / Parallel port / Comparator2 input+ |
| پین 36 | RD3/PSP3/C2IN- — Digital I/O / Parallel port / Comparator2 input- |
| پین 37 | RD4/PSP4/ECCP1 — Digital I/O / Parallel port / Enhanced CCP1 |
| پین 38 | RD5/PSP5 — Digital I/O / Parallel port |
| پین 39 | RD6/PSP6 — Digital I/O / Parallel port |
| پین 40 | RD7/PSP7 — Digital I/O / Parallel port |
| پین 41 | VSS — Ground |
| پین 42 | RC0/T1OSO/T1CKI — Digital I/O / Timer1 oscillator |
| پین 43 | RC6/TX1/CK1 — Digital I/O / EUSART1 TX |
| پین 44 | RC7/RX1/DT1 — Digital I/O / EUSART1 RX |
کاربردهای معمول
PIC18F448-I/PT مناسب است برای 6 کاربردs: CAN-bus Industrial Sensor Node, Automotive Body Controller, HVAC Climate Control System, CAN-to-UART Bridge / Gateway, Industrial Motor Control Board, Smart Building Sensor Hub.
CAN-bus Industrial Sensor Node
The PIC18F448-I/PT's integrated ECAN 2.0B module makes it ideal for CAN-bus sensor nodes in industrial automation. With 16 KB Flash it fits typical CANopen or DeviceNet protocol stacks, while the 10-bit 8-channel ADC samples multiple sensor inputs. The 40 MHz core delivers 10 MIPS, sufficient for handling CAN interrupts while polling sensors. The 44-TQFP footprint allows compact DIN-rail mounted PCB designs.
پیشنهادی
Automotive Body Controller
The PIC18F448-I/PT supports automotive body-electronics applications such as door modules, mirror controllers, and HVAC nodes. Its ECAN interface connects to the vehicle CAN bus, while 34 I/O pins drive relays, LEDs, and switches. The -40C to +85C industrial temperature range covers cabin environments; for under-hood use, choose the -E variant. The nanoWatt technology minimizes quiescent current during vehicle sleep modes.
پیشنهادی
HVAC Climate Control System
In HVAC climate-control boards, the PIC18F448-I/PT reads temperature/humidity sensors via its 10-bit ADC, drives fan speeds through PWM timers, and reports status over CAN to the central building-management system. The 16 KB Flash fits typical HVAC control firmware with scheduling logic, while 768 bytes SRAM handles short-term buffer storage. The 44-TQFP package is easily hand-solderable for prototype runs.
پیشنهادی
CAN-to-UART Bridge / Gateway
Engineers building protocol bridges between legacy UART equipment and modern CAN networks can deploy the PIC18F448-I/PT as a CAN-to-UART gateway. Its independent UART and ECAN peripherals enable simultaneous CAN message reception and UART forwarding, with the 16 KB Flash sufficient for parsing/repackaging logic. The 8-channel ADC can also report diagnostic voltages to the CAN bus for remote monitoring.
پیشنهادی
Industrial Motor Control Board
The PIC18F448-I/PT is well suited for small BLDC or stepper motor control boards in industrial equipment. The 16-bit timers generate precise PWM for motor commutation, the 8-channel 10-bit ADC reads back current/voltage sensing, and the ECAN interface reports telemetry to the central PLC. The 44-TQFP provides 34 I/O pins for encoder feedback, fault inputs, and status LEDs.
پیشنهادی
Smart Building Sensor Hub
Building-automation sensor hubs using the PIC18F448-I/PT aggregate temperature, occupancy, and air-quality data and publish over CAN bus to the central BMS. The 10-bit ADC handles analog sensors while digital I/O reads occupancy PIR detectors. nanoWatt sleep modes reduce idle power when no motion is detected, and the 16 KB Flash fits BACnet-over-CAN or vendor-specific protocol stacks.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای PIC18F448-I/PT — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | PIC18F458-I/PT | PIC18F448-E/PT | PIC18F4480-I/PT | PIC18F4480T-I/PT |
|---|---|---|---|---|---|
| Package | 44-TQFP (10x10 mm) | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 16 KB | 32 KB | 16 KB | 16 KB | 16 KB |
| SRAM | 768 B | 1.5 KB | 768 B | 768 B | 768 B |
| Operating Voltage | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C | -40C to +125C (Extended) | -40C to +85C | -40C to +85C |
| CAN Module | ECAN 2.0B | ECAN 2.0B | ECAN 2.0B | ECAN 2.0B | ECAN 2.0B |
| ADC | 10-bit, 8 channels | 10-bit, 8 channels | 10-bit, 8 channels | 10-bit, 8 channels | 10-bit, 8 channels |
| MIPS | 10 MIPS at 40 MHz | 10 MIPS at 40 MHz | 10 MIPS at 40 MHz | 10 MIPS at 40 MHz | 10 MIPS at 40 MHz |
تفاوت‌های کلیدی
- Integrated ECAN 2.0B module on a PIC18 core (در مقابلPIC18F452-I/PT)
- Drop-in memory upgrade path (در مقابلPIC18F458-I/PT)
- Industrial temperature range option (در مقابلPIC18F448-E/PT)
یادداشت‌های طراحی
CAN bus timing configuration is the most common source of bus-off errors on PIC18F448 designs. The ECAN module requires the SJW, BRP, PropSeg, PhaseSeg1, and PhaseSeg2 registers to be calculated from the oscillator frequency and target baud rate; an off-by-one in BRP causes intermittent bus failures. Use Microchip's CAN bit-timing calculator tool before freezing the configuration. Always configure the CAN I/O pins (RB2/CANTX, RB3/CANRX) as digital inputs first to avoid spurious CAN frames during startup.
Both VDD pins (23 and 32) and all three VSS pins (11, 20, 41) must be connected, even if the corresponding I/O ports are unused. Decoupling requires a 100 nF ceramic capacitor on each VDD pin placed within 5 mm of the package, plus a bulk 10 uF tantalum or aluminum cap on the 5V rail. Brown-out reset (BOR) must be enabled in CONFIG2H to prevent Flash corruption during supply droops below 4.2 V.
Reserve the RB6/PGC and RB7/PGD pins for ICSP programming even in production designs. Adding a 2x5 0.1 inch header (or castellated test pads) allows field firmware updates without removing the chip. The 44-TQFP footprint benefits from a copper keep-out zone under the package and a continuous ground plane on the top layer for thermal dissipation; the device dissipates roughly 250 mW at 40 MHz with all peripherals active.
Estimated: with FOSC at 40 MHz, the PIC18F448 transitions an I/O pin in roughly 10 ns. Place series resistors (33-47 ohm) on high-speed signals like SCK, SDO, and CANTX if the trace length exceeds 25 mm or crosses multiple ground-plane splits. Keep ADC traces (AN0-AN7) short and away from the oscillator pins; ADC accuracy degrades 1-2 LSBs if analog traces run parallel to digital clock traces for more than 20 mm.
اطلاعات انطباق
RoHS compliant per Microchip product page and DigiKey listing. Not AEC-Q100 qualified; for automotive applications requiring formal qualification, evaluate PIC18F458-I/PT automotive variants or higher-grade MCUs. Conflict-minerals compliance per Microchip corporate statement.