PIC18F448T-I/PT - 8-bit MCU, 16KB Flash, 40MHz, CAN 2.0B TQFP-44 | Microchip
MPN： PIC18F448T-I/PT ✓ 啟用中PIC18F448T-I/PT 概覽
An 8-bit microcontroller (MCU) is a programmable computing IC that executes instructions from embedded Flash memory using an 8-bit data path, providing deterministic real-time control for embedded systems. The PIC18F family belongs to Microchip's enhanced PIC architecture, positioned in the broader hierarchy: 8-bit MCU -> microcontroller -> embedded processor -> semiconductor. PIC18F devices add a 16-bit instruction word, hardware multiplier, and C-optimized architecture to the baseline PIC16 instruction set, enabling higher code density and faster execution for applications that exceed baseline PIC16 capabilities but do not justify a 16-bit dsPIC or 32-bit MCU.
Key differentiating features of the PIC18F448 include an integrated ECAN-compatible CAN 2.0B controller (active mode, with 6 acceptance filters and 2 filter masks), a 10-bit ADC with up to 8 channels, 5 PWM outputs with 10-bit resolution, and Microchip's nanoWatt Technology power management with multiple idle/sleep modes. The T-suffix designator indicates tape-and-reel packaging for high-volume production, while the I-suffix denotes the industrial -40C to +85C temperature range.
The device uses a Harvard RISC architecture with separate program and data buses, 32 KB of linear program memory addressing, and a hardware multiply/divide unit. Its ECAN module supports CAN 2.0B active mode with three transmit and two receive buffers, suitable for industrial automation networks and automotive body modules. In-circuit debugging is supported via ICD pins, and self-programming enables field firmware updates through the standard Flash write routines.
Typical applications include CAN-based industrial sensor networks, automotive body and chassis ECUs, HVAC controllers, building automation nodes, and CAN-enabled medical instrumentation. The combination of integrated CAN, ADC, PWM, and nanoWatt power management targets designs that previously required an external CAN controller plus a discrete MCU.
When designing with this IC, ensure the CAN bus is properly terminated with 120 ohm resistors at each end of the bus and that the ECAN bit timing is configured per the network baud rate. The 'T' suffix indicates tape-and-reel; if prototyping, order the non-T variant PIC18F448-I/PT in tray packaging for easier handling.
直接替換替代品，適用於 PIC18F448T-I/PT — 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： PIC18F448T-I/PT （相同外形與佔位） — 差異在於 Operating Temperature, ADC, Timers, Package, Program Memory (Flash).
PIC18F448-I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC18F458-I/PT
✅ 直接替換📋 參考替代品（不在目錄中）
PIC18F4480T-I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC18F4580T-I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC18F4455-I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC18F448T-I/PT 最大額定值與電氣特性
| Family | PIC18F |
| Core | 8-bit PIC RISC |
| Max CPU Frequency | 40 MHz |
| Program Memory (Flash) | 16 KB (8K x 16) |
| RAM | 768 bytes |
| EEPROM | 256 bytes |
| I/O Pins | 34 |
| ADC | 10-bit, 8 channels |
| PWM Outputs | 5 x 10-bit |
| CAN Module | CAN 2.0B active (ECAN), 3 TX buffers, 2 RX buffers, 6 filters, 2 masks |
| Operating Voltage | 2.0 V to 5.5 V |
| 工作溫度 | -40C to +85C (industrial, I-suffix) |
| 封裝 | 44-pin TQFP (PT) 10x10 mm |
| 安裝類型 | Surface Mount |
| Packaging | Tape & Reel (T-suffix) |
| In-Circuit Debug | ICD |
| Self-Programming | Yes |
| Power-Saving Modes | nanoWatt Technology, multiple idle/sleep modes |
| RoHS 狀態 | Compliant |
PIC18F448T-I/PT 腳位配置
| 腳位 1 | RC0/T1OSO/T1CKI — I/O port C bit 0 / Timer1 oscillator output / Timer1 clock input |
| 腳位 2 | RC1/T1OSI/CCP2 — I/O port C bit 1 / Timer1 oscillator input / CCP2 I/O |
| 腳位 3 | RC2/CCP1 — I/O port C bit 2 / CCP1 I/O |
| 腳位 4 | RC3/SCK/SCL — I/O port C bit 3 / SPI clock / I2C clock |
| 腳位 5 | RC4/SDI/SDA — I/O port C bit 4 / SPI data in / I2C data |
| 腳位 6 | RC5/SDO — I/O port C bit 5 / SPI data out |
| 腳位 7 | RC6/TX/CK — I/O port C bit 6 / UART TX / CAN clock (TXCAN) |
| 腳位 8 | RC7/RX/DT — I/O port C bit 7 / UART RX / CAN data (RXCAN) |
| 腳位 9 | VSS — Ground |
| 腳位 10 | VDD — Positive supply |
| 腳位 11 | RB0/INT0 — I/O port B bit 0 / External interrupt 0 |
| 腳位 12 | RB1/INT1 — I/O port B bit 1 / External interrupt 1 |
| 腳位 13 | RB2/INT2/CANTX — I/O port B bit 2 / External interrupt 2 / CAN TX |
| 腳位 14 | RB3/CANRX — I/O port B bit 3 / CAN RX |
| 腳位 15 | RB4 — I/O port B bit 4 |
| 腳位 16 | RB5/PGM — I/O port B bit 5 / LVP programming |
| 腳位 17 | RB6/PGC — I/O port B bit 6 / ICD clock |
| 腳位 18 | RB7/PGD — I/O port B bit 7 / ICD data |
| 腳位 19 | VSS — Ground |
| 腳位 20 | VDD — Positive supply |
| 腳位 21 | RA0/AN0 — I/O port A bit 0 / Analog input 0 |
| 腳位 22 | RA1/AN1 — I/O port A bit 1 / Analog input 1 |
| 腳位 23 | RA2/AN2 — I/O port A bit 2 / Analog input 2 |
| 腳位 24 | RA3/AN3/VREF+ — I/O port A bit 3 / Analog input 3 / ADC VREF+ |
| 腳位 25 | RA4/AN4/T0CKI — I/O port A bit 4 / Analog input 4 / Timer0 clock |
| 腳位 26 | RA5/AN5/SS/LVDIN — I/O port A bit 5 / Analog input 5 / SPI slave select / LVD input |
| 腳位 27 | OSC1/CLKI/RA7 — Oscillator input / Clock input / port A bit 7 |
| 腳位 28 | OSC2/CLKO/RA6 — Oscillator output / Clock output / port A bit 6 |
| 腳位 29 | RD0 — I/O port D bit 0 |
| 腳位 30 | RD1 — I/O port D bit 1 |
| 腳位 31 | RD2 — I/O port D bit 2 |
| 腳位 32 | RD3 — I/O port D bit 3 |
| 腳位 33 | RD4 — I/O port D bit 4 |
| 腳位 34 | RD5 — I/O port D bit 5 |
| 腳位 35 | RD6 — I/O port D bit 6 |
| 腳位 36 | RD7 — I/O port D bit 7 |
| 腳位 37 | VSS — Ground |
| 腳位 38 | VDD — Positive supply |
| 腳位 39 | RE0/RD — I/O port E bit 0 / Parallel slave port read |
| 腳位 40 | RE1/WR — I/O port E bit 1 / Parallel slave port write |
| 腳位 41 | RE2/CS — I/O port E bit 2 / Parallel slave port chip select |
| 腳位 42 | VSS — Ground |
| 腳位 43 | AVDD — Analog positive supply |
| 腳位 44 | AVSS — Analog ground |
典型應用
PIC18F448T-I/PT 適用於 6 應用s: Industrial CAN Sensor Networks, Automotive Body Control Modules, HVAC Building Automation Controllers, Medical Instrumentation with CAN, CAN-Enabled Motor Control, Embedded CAN Protocol Bridges.
Industrial CAN Sensor Networks
The PIC18F448T-I/PT is well-suited for industrial CAN 2.0B sensor nodes because its integrated ECAN controller eliminates the need for an external CAN transceiver-side MCU pairing. Its 6 hardware acceptance filters and 2 filter masks reduce host CPU overhead by filtering CAN messages in hardware before software intervention. With 16 KB Flash and 768 bytes RAM, the device can host CANopen or DeviceNet protocol stacks for distributed sensor nodes. The 40 MHz core delivers sufficient throughput for 1 Mbps CAN-FD-adjacent classical CAN traffic, while the nanoWatt sleep modes cut current draw below 1 uA for battery-backed remote sensor installations. The TQFP-44 package and industrial temperature range make it a strong fit for factory-floor PLCs and process monitoring equipment.
推薦
Automotive Body Control Modules
For non-safety-critical automotive body electronics such as HVAC actuators, lighting controllers, and door modules, the PIC18F448T-I/PT provides integrated CAN, ADC, and PWM in a single chip. Its 5 10-bit PWM channels can directly drive LED dimmers, fan speed controllers, or small brushed DC motors via external MOSFET drivers. The 10-bit ADC with 8 channels handles sensor inputs like temperature, pressure, and position feedback without external analog multiplexers. While the industrial -40C to +85C range suits cabin-mounted modules, designers targeting under-hood or powertrain applications should migrate to AEC-Q100 qualified parts like PIC18F4580. The integrated ECAN module supports body-network protocols used in mainstream automotive CAN bus systems at 500 kbps.
推薦
HVAC Building Automation Controllers
The PIC18F448T-I/PT serves as a controller node in building HVAC systems, leveraging its ADC for temperature and humidity sensors, PWM outputs for damper and valve actuators, and CAN for network connectivity to building automation controllers. The nanoWatt Technology power management reduces idle consumption in always-on building nodes, while the industrial temperature rating handles equipment-room environments. With 16 KB Flash, firmware can store multi-day scheduling tables and PID control loops for zone-level climate regulation. The integrated ECAN module allows daisy-chaining multiple HVAC zones on a single CAN backbone, simplifying wiring versus star-topology analog control.
推薦
Medical Instrumentation with CAN
In CAN-networked medical devices such as patient monitors, infusion pumps, and laboratory analyzers, the PIC18F448T-I/PT provides reliable 8-bit processing with hardware CAN connectivity. The integrated 10-bit ADC reads sensor data from medical transducers, while the PWM outputs drive buzzer alarms and motor-controlled syringe pumps. The nanoWatt sleep modes extend battery life in portable patient-monitoring equipment, and the -40C to +85C industrial range covers most clinical environments. Designers should note that medical safety-critical designs require IEC 60730 or IEC 61508 software validation beyond the MCU's industrial qualification; the PIC18F448T-I/PT is appropriate for non-life-support medical peripherals.
推薦
CAN-Enabled Motor Control
The PIC18F448T-I/PT can drive small brushless DC or stepper motor control loops via its 5 PWM outputs and 10-bit ADC for current/voltage feedback, with CAN providing the network interface for centralized motion controllers. The 40 MHz instruction rate delivers sufficient bandwidth for trapezoidal commutation at moderate RPMs in fan, pump, and small actuator applications. Hardware ECAN filtering offloads network traffic from the CPU, leaving cycles available for the motor control loop. Designers using this device for motor control should add external gate drivers and protection circuits; the MCU's PWM outputs directly drive logic-level FETs only at low currents.
推薦
Embedded CAN Protocol Bridges
The PIC18F448T-I/PT is ideal for protocol bridge/gateway nodes that connect CAN peripherals to higher-level networks or serial debug ports. Its 16 KB Flash stores dual-protocol stacks (e.g., CAN-to-UART or CAN-to-SPI bridging), while the 34 I/O pins accommodate multiple serial ports for bridge interfaces. The integrated ECAN module with 6 acceptance filters allows the bridge to mask non-essential bus traffic, reducing protocol-stack CPU overhead. The tape-and-reel T-suffix package supports high-volume OEM production of bridge modules integrated into industrial machinery or vehicle sub-assemblies.
推薦
推薦產品摘要
工程參考資料，適用於 PIC18F448T-I/PT — 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 | PIC18F448-I/PT | PIC18F458-I/PT | PIC18F4480T-I/PT | PIC18F4580T-I/PT | PIC18F4455-I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-44 (PT) 10x10 mm | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same |
| Core | 8-bit PIC RISC, 40 MHz | 8-bit PIC RISC, 40 MHz | 8-bit PIC RISC, 40 MHz | 8-bit PIC RISC, 40 MHz | 8-bit PIC RISC, 40 MHz | 8-bit PIC RISC, 48 MHz |
| Flash Program Memory | 16 KB | 16 KB | 32 KB | 16 KB | 32 KB | 24 KB |
| RAM | 768 bytes | 768 bytes | 1536 bytes | 768 bytes | 1536 bytes | 2048 bytes |
| CAN Module | CAN 2.0B active, 6 filters | CAN 2.0B active, 6 filters | CAN 2.0B active, 6 filters | ECAN enhanced | ECAN enhanced | CAN 2.0B + USB 2.0 FS |
| ADC | 10-bit, 8 channels | 10-bit, 8 channels | 10-bit, 8 channels | 10-bit, 11 channels | 10-bit, 11 channels | 10-bit, 8 channels |
| Packaging Format | Tape & Reel (T-suffix) | Tray (no T-suffix) | Tray (no T-suffix) | Tape & Reel | Tape & Reel | Tray |
| Operating Temperature | -40C to +85C (industrial) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
主要差異化特點
- Integrated CAN 2.0B active controller with hardware acceptance filters (對比PIC18F448-I/PT)
- Industrial -40C to +85C temperature range (對比PIC18F4580T-I/PT)
- Compact 16 KB Flash and 768B RAM in TQFP-44 (對比PIC18F4455-I/PT)
設計說明
Place a 100 nF decoupling capacitor as close as possible to each VDD pin (pins 11, 32, 38) and a bulk 10 uF tantalum or ceramic capacitor on the AVDD pin (43) to filter ADC reference noise. Route the analog AVSS/AVDD traces separately from digital VSS/VDD to prevent digital switching noise from coupling into ADC readings. Keep crystal traces short and guard them with a ground pour to minimize EMI on the OSC1/OSC2 pins.
The ECAN module requires a 120 ohm termination resistor at each end of the CAN bus; missing termination causes signal reflections and bus errors. Configure the CAN bit timing registers (BRGCON1/2/3) per the network baud rate and oscillator frequency, otherwise CAN frames will not be acknowledged. The CANRX (RB3) and CANTX (RB2) pins must be configured as digital inputs/outputs by clearing the appropriate TRISB bits before enabling the ECAN module.
Estimated: at 5V VDD, 40 MHz CPU, and all peripherals active, typical IDD is around 25 mA per datasheet DC characteristics, yielding ~125 mW dissipation. The TQFP-44 has thermal resistance theta_JA of approximately 45 C/W, giving a junction temperature rise of ~5.6C above ambient at typical operation - well within the -40C to +85C industrial range. Designers using the device at elevated ambient temperatures should verify the actual theta_JA from the package thermal metrics in the datasheet for their PCB copper area.
Route the ICSP/ICD signals (RB6/PGC, RB7/PGD, MCLR/VPP) with test-point access or a 2x5 0.1 inch header footprint for in-circuit programming and debugging. Add a current-limiting resistor (~10 kohm) on the MCLR pin if external reset is not required, or omit for production boards. Reserve the RB6/RB7 pins for ICD if in-circuit debugging is planned, as alternate functions may conflict during debug sessions.
合規資訊
RoHS compliant per Microchip product page. AEC-Q100 not qualified - choose PIC18F4580 or PIC18F46K80 family for automotive. The -40C to +85C industrial temperature range covers most non-automotive applications.