PIC18F448T-I/PT - 8-bit MCU, 16KB Flash, 40MHz, CAN 2.0B TQFP-44 | Microchip
MPN: PIC18F448T-I/PT ✓ פעילPIC18F448T-I/PT סקירה
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.
חלופות תחליף ישיר עבור PIC18F448T-I/PT — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם PIC18F448T-I/PT (אותו גורם צורה וטביעת רגל) — שונים ב Operating Temperature, ADC, Timers, Package, Program Memory (Flash).
PIC18F448-I/PT
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC18F458-I/PT
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
PIC18F4480T-I/PT
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC18F4580T-I/PT
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC18F4455-I/PT
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC18F448T-I/PT דירוגים מרביים ומאפיינים חשמליים
| 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 |
| טמפרטורת פעולה | -40C to +85C (industrial, I-suffix) |
| מארז | 44-pin TQFP (PT) 10x10 mm |
| סוג הרכבה | Surface Mount |
| Packaging | Tape & Reel (T-suffix) |
| In-Circuit Debug | ICD |
| Self-Programming | Yes |
| Power-Saving Modes | nanoWatt Technology, multiple idle/sleep modes |
| סטטוס RoHS | Compliant |
תצורת פינים של PIC18F448T-I/PT
| פין 1 | RC0/T1OSO/T1CKI — I/O port C bit 0 / Timer1 oscillator output / Timer1 clock input |
| פין 2 | RC1/T1OSI/CCP2 — I/O port C bit 1 / Timer1 oscillator input / CCP2 I/O |
| פין 3 | RC2/CCP1 — I/O port C bit 2 / CCP1 I/O |
| פין 4 | RC3/SCK/SCL — I/O port C bit 3 / SPI clock / I2C clock |
| פין 5 | RC4/SDI/SDA — I/O port C bit 4 / SPI data in / I2C data |
| פין 6 | RC5/SDO — I/O port C bit 5 / SPI data out |
| פין 7 | RC6/TX/CK — I/O port C bit 6 / UART TX / CAN clock (TXCAN) |
| פין 8 | RC7/RX/DT — I/O port C bit 7 / UART RX / CAN data (RXCAN) |
| פין 9 | VSS — Ground |
| פין 10 | VDD — Positive supply |
| פין 11 | RB0/INT0 — I/O port B bit 0 / External interrupt 0 |
| פין 12 | RB1/INT1 — I/O port B bit 1 / External interrupt 1 |
| פין 13 | RB2/INT2/CANTX — I/O port B bit 2 / External interrupt 2 / CAN TX |
| פין 14 | RB3/CANRX — I/O port B bit 3 / CAN RX |
| פין 15 | RB4 — I/O port B bit 4 |
| פין 16 | RB5/PGM — I/O port B bit 5 / LVP programming |
| פין 17 | RB6/PGC — I/O port B bit 6 / ICD clock |
| פין 18 | RB7/PGD — I/O port B bit 7 / ICD data |
| פין 19 | VSS — Ground |
| פין 20 | VDD — Positive supply |
| פין 21 | RA0/AN0 — I/O port A bit 0 / Analog input 0 |
| פין 22 | RA1/AN1 — I/O port A bit 1 / Analog input 1 |
| פין 23 | RA2/AN2 — I/O port A bit 2 / Analog input 2 |
| פין 24 | RA3/AN3/VREF+ — I/O port A bit 3 / Analog input 3 / ADC VREF+ |
| פין 25 | RA4/AN4/T0CKI — I/O port A bit 4 / Analog input 4 / Timer0 clock |
| פין 26 | RA5/AN5/SS/LVDIN — I/O port A bit 5 / Analog input 5 / SPI slave select / LVD input |
| פין 27 | OSC1/CLKI/RA7 — Oscillator input / Clock input / port A bit 7 |
| פין 28 | OSC2/CLKO/RA6 — Oscillator output / Clock output / port A bit 6 |
| פין 29 | RD0 — I/O port D bit 0 |
| פין 30 | RD1 — I/O port D bit 1 |
| פין 31 | RD2 — I/O port D bit 2 |
| פין 32 | RD3 — I/O port D bit 3 |
| פין 33 | RD4 — I/O port D bit 4 |
| פין 34 | RD5 — I/O port D bit 5 |
| פין 35 | RD6 — I/O port D bit 6 |
| פין 36 | RD7 — I/O port D bit 7 |
| פין 37 | VSS — Ground |
| פין 38 | VDD — Positive supply |
| פין 39 | RE0/RD — I/O port E bit 0 / Parallel slave port read |
| פין 40 | RE1/WR — I/O port E bit 1 / Parallel slave port write |
| פין 41 | RE2/CS — I/O port E bit 2 / Parallel slave port chip select |
| פין 42 | VSS — Ground |
| פין 43 | AVDD — Analog positive supply |
| פין 44 | AVSS — Analog ground |
יישומים טיפוסיים
PIC18F448T-I/PT מתאים עבור 6 יישוםs: 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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור PIC18F448T-I/PT — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | 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 |
מבדילים עיקריים
- Integrated CAN 2.0B active controller with hardware acceptance filters (לעומתPIC18F448-I/PT)
- Industrial -40C to +85C temperature range (לעומתPIC18F4580T-I/PT)
- Compact 16 KB Flash and 768B RAM in TQFP-44 (לעומתPIC18F4455-I/PT)
הערות תכנון
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.
מידע על תאימות
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.