PIC18F448-I/PT - 8-bit MCU 16KB Flash 44-TQFP | Microchip
Référence : PIC18F448-I/PT ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 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 Présentation
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.
Alternatives de remplacement direct pour PIC18F448-I/PT — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec PIC18F448-I/PT (même facteur de forme et même empreinte) — différant par Package, Operating Temperature, ADC, Core Architecture, Timers.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
PIC18F458-I/PT
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PIC18F448-E/PT
✅ Remplacement direct✓ En stock
$4.65 / unité
Voir la fiche technique →PIC18F4480-I/PT
✅ Remplacement direct✓ En stock
$4.85 / unité
Voir la fiche technique →PIC18F4480T-I/PT
✅ Remplacement direct✓ En stock
$3.24 / unité
Voir la fiche technique →PIC18F442-I/P
✅ Remplacement direct✓ En stock
$5.4 / unité
Voir la fiche technique →PIC18F4423T-I/PT
✅ Remplacement direct✓ En stock
$1.97 / unité
Voir la fiche technique →PIC18F448-I/PT Valeurs maximales et caractéristiques électriques
| 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 |
| Température de fonctionnement | -40C to +85C (Industrial, -I) |
| Boîtier | 44-pin TQFP (10x10 mm) |
| Type de montage | Surface Mount |
| Niveau MSL | 3 (168 hours) |
| Statut RoHS | Compliant |
| Lead-Free | Yes |
| ICSP Programming | PGC/PGD (2-wire) |
Configuration des broches de PIC18F448-I/PT
| Broche 1 | RC7/RX1/DT1 — Digital I/O / EUSART1 RX / I2C data |
| Broche 2 | RC6/TX1/CK1 — Digital I/O / EUSART1 TX / I2C clock |
| Broche 3 | RC5/SDO — Digital I/O / SPI data out |
| Broche 4 | RC4/SDI/SDA — Digital I/O / SPI data in / I2C data |
| Broche 5 | RC3/SCK/SCL — Digital I/O / SPI clock / I2C clock |
| Broche 6 | RC2/CCP1 — Digital I/O / Capture/Compare/PWM1 |
| Broche 7 | RC1/CCP2 — Digital I/O / Capture/Compare/PWM2 |
| Broche 8 | RC0/T1OSO/T1CKI — Digital I/O / Timer1 oscillator out |
| Broche 9 | OSC1/CLKI — Crystal oscillator input |
| Broche 10 | OSC2/CLKO — Crystal oscillator output |
| Broche 11 | VSS — Ground |
| Broche 12 | RA0/AN0 — Digital I/O / Analog input 0 |
| Broche 13 | RA1/AN1 — Digital I/O / Analog input 1 |
| Broche 14 | RA2/AN2/VREF- — Digital I/O / Analog input 2 / VREF- |
| Broche 15 | RA3/AN3/VREF+ — Digital I/O / Analog input 3 / VREF+ |
| Broche 16 | RA4/T0CKI — Digital I/O / Timer0 clock |
| Broche 17 | RA5/AN4/SS — Digital I/O / Analog input 4 / SPI slave select |
| Broche 18 | RE0/RD/AN5 — Digital I/O / Parallel port read / Analog input 5 |
| Broche 19 | RE1/WR/AN6 — Digital I/O / Parallel port write / Analog input 6 |
| Broche 20 | VSS — Ground |
| Broche 21 | RA7 — Digital I/O |
| Broche 22 | RE2/CS/AN7 — Digital I/O / Parallel port chip select / Analog input 7 |
| Broche 23 | VDD — Positive supply (4.2V-5.5V) |
| Broche 24 | RB0/INT0/FLT0 — Digital I/O / External interrupt 0 / PWM fault |
| Broche 25 | RB1/INT1 — Digital I/O / External interrupt 1 |
| Broche 26 | RB2/INT2/CANTX — Digital I/O / External interrupt 2 / CAN TX |
| Broche 27 | RB3/INT3/CANRX — Digital I/O / External interrupt 3 / CAN RX |
| Broche 28 | RB4 — Digital I/O |
| Broche 29 | RB5 — Digital I/O |
| Broche 30 | RB6/PGC — Digital I/O / ICSP clock (programming) |
| Broche 31 | RB7/PGD — Digital I/O / ICSP data (programming) |
| Broche 32 | VDD — Positive supply (4.2V-5.5V) |
| Broche 33 | RD0/PSP0/C1IN+ — Digital I/O / Parallel port / Comparator1 input+ |
| Broche 34 | RD1/PSP1/C1IN- — Digital I/O / Parallel port / Comparator1 input- |
| Broche 35 | RD2/PSP2/C2IN+ — Digital I/O / Parallel port / Comparator2 input+ |
| Broche 36 | RD3/PSP3/C2IN- — Digital I/O / Parallel port / Comparator2 input- |
| Broche 37 | RD4/PSP4/ECCP1 — Digital I/O / Parallel port / Enhanced CCP1 |
| Broche 38 | RD5/PSP5 — Digital I/O / Parallel port |
| Broche 39 | RD6/PSP6 — Digital I/O / Parallel port |
| Broche 40 | RD7/PSP7 — Digital I/O / Parallel port |
| Broche 41 | VSS — Ground |
| Broche 42 | RC0/T1OSO/T1CKI — Digital I/O / Timer1 oscillator |
| Broche 43 | RC6/TX1/CK1 — Digital I/O / EUSART1 TX |
| Broche 44 | RC7/RX1/DT1 — Digital I/O / EUSART1 RX |
Applications typiques
PIC18F448-I/PT convient pour 6 applications: 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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PIC18F448-I/PT — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | 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 |
Principaux différenciateurs
- Integrated ECAN 2.0B module on a PIC18 core (vs PIC18F452-I/PT)
- Drop-in memory upgrade path (vs PIC18F458-I/PT)
- Industrial temperature range option (vs PIC18F448-E/PT)
Notes de conception
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.
Informations de conformité
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.