PIC18F448-I/PT - 8-bit MCU 16KB Flash 44-TQFP | Microchip
MPN: PIC18F448-I/PT ✓ פעילPIC18F448-I/PT סקירה
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.
חלופות תחליף ישיר עבור PIC18F448-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 PIC18F448-I/PT (אותו גורם צורה וטביעת רגל) — שונים ב Package, Operating Temperature, ADC, Core Architecture, Timers.
PIC18F458-I/PT
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
PIC18F448-E/PT
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC18F4480-I/PT
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC18F4480T-I/PT
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC18F442-I/P
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC18F4423T-I/PT
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC18F448-I/PT דירוגים מרביים ומאפיינים חשמליים
| 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 |
| טמפרטורת פעולה | -40C to +85C (Industrial, -I) |
| מארז | 44-pin TQFP (10x10 mm) |
| סוג הרכבה | Surface Mount |
| רמת MSL | 3 (168 hours) |
| סטטוס RoHS | Compliant |
| Lead-Free | Yes |
| ICSP Programming | PGC/PGD (2-wire) |
תצורת פינים של PIC18F448-I/PT
| פין 1 | RC7/RX1/DT1 — Digital I/O / EUSART1 RX / I2C data |
| פין 2 | RC6/TX1/CK1 — Digital I/O / EUSART1 TX / I2C clock |
| פין 3 | RC5/SDO — Digital I/O / SPI data out |
| פין 4 | RC4/SDI/SDA — Digital I/O / SPI data in / I2C data |
| פין 5 | RC3/SCK/SCL — Digital I/O / SPI clock / I2C clock |
| פין 6 | RC2/CCP1 — Digital I/O / Capture/Compare/PWM1 |
| פין 7 | RC1/CCP2 — Digital I/O / Capture/Compare/PWM2 |
| פין 8 | RC0/T1OSO/T1CKI — Digital I/O / Timer1 oscillator out |
| פין 9 | OSC1/CLKI — Crystal oscillator input |
| פין 10 | OSC2/CLKO — Crystal oscillator output |
| פין 11 | VSS — Ground |
| פין 12 | RA0/AN0 — Digital I/O / Analog input 0 |
| פין 13 | RA1/AN1 — Digital I/O / Analog input 1 |
| פין 14 | RA2/AN2/VREF- — Digital I/O / Analog input 2 / VREF- |
| פין 15 | RA3/AN3/VREF+ — Digital I/O / Analog input 3 / VREF+ |
| פין 16 | RA4/T0CKI — Digital I/O / Timer0 clock |
| פין 17 | RA5/AN4/SS — Digital I/O / Analog input 4 / SPI slave select |
| פין 18 | RE0/RD/AN5 — Digital I/O / Parallel port read / Analog input 5 |
| פין 19 | RE1/WR/AN6 — Digital I/O / Parallel port write / Analog input 6 |
| פין 20 | VSS — Ground |
| פין 21 | RA7 — Digital I/O |
| פין 22 | RE2/CS/AN7 — Digital I/O / Parallel port chip select / Analog input 7 |
| פין 23 | VDD — Positive supply (4.2V-5.5V) |
| פין 24 | RB0/INT0/FLT0 — Digital I/O / External interrupt 0 / PWM fault |
| פין 25 | RB1/INT1 — Digital I/O / External interrupt 1 |
| פין 26 | RB2/INT2/CANTX — Digital I/O / External interrupt 2 / CAN TX |
| פין 27 | RB3/INT3/CANRX — Digital I/O / External interrupt 3 / CAN RX |
| פין 28 | RB4 — Digital I/O |
| פין 29 | RB5 — Digital I/O |
| פין 30 | RB6/PGC — Digital I/O / ICSP clock (programming) |
| פין 31 | RB7/PGD — Digital I/O / ICSP data (programming) |
| פין 32 | VDD — Positive supply (4.2V-5.5V) |
| פין 33 | RD0/PSP0/C1IN+ — Digital I/O / Parallel port / Comparator1 input+ |
| פין 34 | RD1/PSP1/C1IN- — Digital I/O / Parallel port / Comparator1 input- |
| פין 35 | RD2/PSP2/C2IN+ — Digital I/O / Parallel port / Comparator2 input+ |
| פין 36 | RD3/PSP3/C2IN- — Digital I/O / Parallel port / Comparator2 input- |
| פין 37 | RD4/PSP4/ECCP1 — Digital I/O / Parallel port / Enhanced CCP1 |
| פין 38 | RD5/PSP5 — Digital I/O / Parallel port |
| פין 39 | RD6/PSP6 — Digital I/O / Parallel port |
| פין 40 | RD7/PSP7 — Digital I/O / Parallel port |
| פין 41 | VSS — Ground |
| פין 42 | RC0/T1OSO/T1CKI — Digital I/O / Timer1 oscillator |
| פין 43 | RC6/TX1/CK1 — Digital I/O / EUSART1 TX |
| פין 44 | RC7/RX1/DT1 — Digital I/O / EUSART1 RX |
יישומים טיפוסיים
PIC18F448-I/PT מתאים עבור 6 יישוםs: 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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור PIC18F448-I/PT — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | 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 |
מבדילים עיקריים
- Integrated ECAN 2.0B module on a PIC18 core (לעומתPIC18F452-I/PT)
- Drop-in memory upgrade path (לעומתPIC18F458-I/PT)
- Industrial temperature range option (לעומתPIC18F448-E/PT)
הערות תכנון
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.
מידע על תאימות
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.