PIC18F448-I/PT - 8-bit MCU 16KB Flash 44-TQFP | Microchip
Артикул: PIC18F448-I/PT ✓ Активен| Кол-во | Цена за ед. | Итого |
|---|---|---|
| 1 | $10.71 | $10,71 |
| 10 | $9.85 | $98,50 |
| 100 | $8.8 | $880,00 |
| 500 | $7.95 | $3.975,00 |
| 1.000 | $7.2 | $7.200,00 |
PIC18F448-I/PT Обзор
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.
Аналоги без доработки для PIC18F448-I/PT — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Варианты в этой серии
Модели той же серии, совместимые без доработки с PIC18F448-I/PT (тот же форм-фактор и посадочное место) — отличается по Package, Operating Temperature, ADC, Core Architecture, Timers.
Инструмент быстрого сравнения — выберите альтернативные компоненты для сравнения бок о бок:
PIC18F458-I/PT
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
PIC18F448-E/PT
✅ Прямая замена✓ В наличии
$4.65 / шт.
Открыть даташит →PIC18F4480-I/PT
✅ Прямая замена✓ В наличии
$4.85 / шт.
Открыть даташит →PIC18F4480T-I/PT
✅ Прямая замена✓ В наличии
$3.24 / шт.
Открыть даташит →PIC18F442-I/P
✅ Прямая замена✓ В наличии
$5.4 / шт.
Открыть даташит →PIC18F4423T-I/PT
✅ Прямая замена✓ В наличии
$1.97 / шт.
Открыть даташит →PIC18F448-I/PT Максимальные параметры и электрические характеристики
| 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 |
| Рабочая температура | -40C to +85C (Industrial, -I) |
| Корпус | 44-pin TQFP (10x10 mm) |
| Тип монтажа | Surface Mount |
| Уровень MSL | 3 (168 hours) |
| Статус RoHS | Compliant |
| Lead-Free | Yes |
| ICSP Programming | PGC/PGD (2-wire) |
Конфигурация выводов PIC18F448-I/PT
| Контакт 1 | RC7/RX1/DT1 — Digital I/O / EUSART1 RX / I2C data |
| Контакт 2 | RC6/TX1/CK1 — Digital I/O / EUSART1 TX / I2C clock |
| Контакт 3 | RC5/SDO — Digital I/O / SPI data out |
| Контакт 4 | RC4/SDI/SDA — Digital I/O / SPI data in / I2C data |
| Контакт 5 | RC3/SCK/SCL — Digital I/O / SPI clock / I2C clock |
| Контакт 6 | RC2/CCP1 — Digital I/O / Capture/Compare/PWM1 |
| Контакт 7 | RC1/CCP2 — Digital I/O / Capture/Compare/PWM2 |
| Контакт 8 | RC0/T1OSO/T1CKI — Digital I/O / Timer1 oscillator out |
| Контакт 9 | OSC1/CLKI — Crystal oscillator input |
| Контакт 10 | OSC2/CLKO — Crystal oscillator output |
| Контакт 11 | VSS — Ground |
| Контакт 12 | RA0/AN0 — Digital I/O / Analog input 0 |
| Контакт 13 | RA1/AN1 — Digital I/O / Analog input 1 |
| Контакт 14 | RA2/AN2/VREF- — Digital I/O / Analog input 2 / VREF- |
| Контакт 15 | RA3/AN3/VREF+ — Digital I/O / Analog input 3 / VREF+ |
| Контакт 16 | RA4/T0CKI — Digital I/O / Timer0 clock |
| Контакт 17 | RA5/AN4/SS — Digital I/O / Analog input 4 / SPI slave select |
| Контакт 18 | RE0/RD/AN5 — Digital I/O / Parallel port read / Analog input 5 |
| Контакт 19 | RE1/WR/AN6 — Digital I/O / Parallel port write / Analog input 6 |
| Контакт 20 | VSS — Ground |
| Контакт 21 | RA7 — Digital I/O |
| Контакт 22 | RE2/CS/AN7 — Digital I/O / Parallel port chip select / Analog input 7 |
| Контакт 23 | VDD — Positive supply (4.2V-5.5V) |
| Контакт 24 | RB0/INT0/FLT0 — Digital I/O / External interrupt 0 / PWM fault |
| Контакт 25 | RB1/INT1 — Digital I/O / External interrupt 1 |
| Контакт 26 | RB2/INT2/CANTX — Digital I/O / External interrupt 2 / CAN TX |
| Контакт 27 | RB3/INT3/CANRX — Digital I/O / External interrupt 3 / CAN RX |
| Контакт 28 | RB4 — Digital I/O |
| Контакт 29 | RB5 — Digital I/O |
| Контакт 30 | RB6/PGC — Digital I/O / ICSP clock (programming) |
| Контакт 31 | RB7/PGD — Digital I/O / ICSP data (programming) |
| Контакт 32 | VDD — Positive supply (4.2V-5.5V) |
| Контакт 33 | RD0/PSP0/C1IN+ — Digital I/O / Parallel port / Comparator1 input+ |
| Контакт 34 | RD1/PSP1/C1IN- — Digital I/O / Parallel port / Comparator1 input- |
| Контакт 35 | RD2/PSP2/C2IN+ — Digital I/O / Parallel port / Comparator2 input+ |
| Контакт 36 | RD3/PSP3/C2IN- — Digital I/O / Parallel port / Comparator2 input- |
| Контакт 37 | RD4/PSP4/ECCP1 — Digital I/O / Parallel port / Enhanced CCP1 |
| Контакт 38 | RD5/PSP5 — Digital I/O / Parallel port |
| Контакт 39 | RD6/PSP6 — Digital I/O / Parallel port |
| Контакт 40 | RD7/PSP7 — Digital I/O / Parallel port |
| Контакт 41 | VSS — Ground |
| Контакт 42 | RC0/T1OSO/T1CKI — Digital I/O / Timer1 oscillator |
| Контакт 43 | RC6/TX1/CK1 — Digital I/O / EUSART1 TX |
| Контакт 44 | RC7/RX1/DT1 — Digital I/O / EUSART1 RX |
Типичное применение
PIC18F448-I/PT подходит для 6 применениеs: 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.
Рекомендуется
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.
Рекомендуется
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.
Рекомендуется
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.
Рекомендуется
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.
Рекомендуется
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.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для PIC18F448-I/PT — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | 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 |
Ключевые отличия
- Integrated ECAN 2.0B module on a PIC18 core (против PIC18F452-I/PT)
- Drop-in memory upgrade path (против PIC18F458-I/PT)
- Industrial temperature range option (против PIC18F448-E/PT)
Заметки по проектированию
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.
Информация о соответствии
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.