PIC18F4550-I/P - 48MHz 8-Bit USB Microcontroller | Microchip
Référence : PIC18F4550-I/P ✓ ActifPIC18F4550-I/P Présentation
The PIC18F4550 belongs to the PIC18 family of high-performance RISC microcontrollers. Its enhanced Flash memory supports in-circuit programming and applications that require firmware updates. The device combines USB connectivity with I2C, SPI capable of operation up to 10 Mbit/s, and an asynchronous EUSART/LIN-capable serial port, making it useful for connected industrial and consumer equipment.
Key device characteristics include a 13-channel, 10-bit ADC, nanoWatt technology for reduced power consumption, and operation across an industrial temperature range described in the device documentation. The 40-pin DIP package is convenient for prototyping, educational platforms, through-hole assembly, and designs that require a socketed or leaded controller.
PIC18F4550-I/P is appropriate for USB peripheral controllers, instrumentation, data acquisition modules, serial bridges, communications equipment, and low-power embedded systems. Its combination of USB, multiple serial interfaces, ADC capability, and conventional through-hole packaging provides a practical platform for standalone control products.
For PCB design, follow the Microchip datasheet pin-description and package-drawing tables when assigning signals and laying out the board. The USB interface requires careful routing and the device datasheet should be consulted for clock, decoupling, input, and output requirements. The -I grade designation identifies the industrial-temperature version, while /P identifies the 40-pin DIP package.
This product page combines the device's principal connectivity, memory, processing, and application information with practical guidance for PCB implementation, firmware integration, and comparison with same-package PIC18 options. The manufacturer datasheet remains the controlling reference for pin assignments, absolute maximum ratings, timing, and electrical characteristics.
Alternatives de remplacement direct pour PIC18F4550-I/P — 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 PIC18F4550-I/P (même facteur de forme et même empreinte) — différant par Package, ADC, Operating Temperature, Timers, Mounting Type.
PIC18F452-I/P
✅ Remplacement directContactez-nous pour le prix
Voir la fiche technique →PIC18F4439-I/PT
✅ Remplacement directContactez-nous pour le prix
Voir la fiche technique →PIC18F4550-I/P Valeurs maximales et caractéristiques électriques
| Microcontroller Type | 8-bit PIC18 enhanced-flash microcontroller |
| Fréquence d'horloge maximale | 48 MHz |
| Program Flash Memory | 32 KB |
| RAM | 2 KB |
| Boîtier | 40-pin DIP (PDIP) |
| Type de montage | Through-hole |
| USB Interface | Full-speed USB, 12 Mbit/s |
| I2C Interface | Yes |
| SPI Interface | Yes, up to 10 Mbit/s |
| UART Interface | EUSART with LIN capability |
| ADC Resolution | 10-bit |
| ADC Channels | 13 channels |
| Architecture | Enhanced Flash PIC18 RISC |
| Low-Power Technology | nanoWatt technology |
Guide de configuration des broches du PIC18F4550-I/P 40-pin dip (pdip)
Configuration des broches du PIC18F4550-I/P (boîtier 40-pin dip (pdip)). Ce circuit intégré numérique comprend des GPIO, des interfaces de communication (UART, SPI, I2C) et des broches d'alimentation. Consultez la fiche technique du fabricant pour les fonctions alternatives des broches et les options de configuration. Indispensable pour la conception de systèmes embarqués et la conception de circuits imprimés.
Aucune donnée de brochage détaillée disponible pour PIC18F4550-I/P.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
PIC18F4550-I/P convient pour 6 applications: USB Data-Acquisition Controller, USB-to-Serial Communications Bridge, Industrial Sensor Interface, USB Control Panel, Bootloader-Enabled USB Product, Low-Power Connected Embedded Instrument.
USB Data-Acquisition Controller
The PIC18F4550-I/P fits compact USB measurement equipment because it combines a 48 MHz 8-bit core with a 13-channel, 10-bit ADC, 32 KB of program Flash, 2 KB of RAM, and full-speed USB at 12 Mbit/s. The controller can acquire sensor inputs, perform control calculations, and return sampled data to a host over USB. Its 40-pin DIP package also simplifies prototype assembly and socketed laboratory construction. The main performance consideration is the modest conversion bandwidth of the 10-bit ADC, so analog front-end filtering, input protection, and acquisition timing should be matched to the measurement bandwidth.
Recommandé
USB-to-Serial Communications Bridge
The PIC18F4550-I/P is suitable for a USB-to-serial bridge because it provides full-speed USB alongside EUSART, I2C, and SPI interfaces. Firmware can receive commands over USB and relay them through EUSART, while the 32 KB Flash and 2 KB RAM accommodate protocol handling and buffering. The device's multiple communication peripherals make it practical for combining USB with industrial serial equipment. Designers should use buffered transceivers where cable-length, ground-reference, or logic-level requirements exceed the MCU pins' direct capabilities.
Recommandé
Industrial Sensor Interface
The PIC18F4550-I/P can serve as the controller in an industrial sensor interface when the system needs both local measurement and network connectivity. Its 13-channel 10-bit ADC supports multiple analog sensor inputs, while I2C and SPI provide access to external sensors, transceivers, and memory. The 48 MHz maximum clock supports responsive sampling and protocol handling. Industrial deployment should evaluate electrical transients, isolation, grounding, and environmental limits rather than assuming logic-level robustness; the -I grade identifies the industrial-temperature version.
Recommandé
USB Control Panel
The PIC18F4550-I/P is appropriate for a USB-connected control panel where buttons, indicators, relays, and analog adjustments must be coordinated by a host or embedded user interface. The 40-pin DIP package provides access to a broad I/O set, while USB removes the need for a separate host interface in the end product. Its 32 KB Flash offers room for control logic and USB firmware, and the 2 KB RAM supports temporary panel-state data. The design should debounce inputs and account for relay-driver isolation or transistor stages rather than driving unsuitable loads directly from MCU pins.
Recommandé
Bootloader-Enabled USB Product
The PIC18F4550-I/P is well suited to products that need field firmware updates through USB because it combines enhanced program Flash with a full-speed USB controller. A bootloader can occupy part of Flash, receive an image from a host, verify it, and transfer control to the application image. The same MCU can then operate as the product controller after startup. Firmware architecture must account for bootloader size, reset-vector placement, Flash write timing, and application boundaries. Production designs should also define update failure recovery to prevent an interrupted update from leaving the product unusable.
Recommandé
Low-Power Connected Embedded Instrument
The PIC18F4550-I/P fits low-power connected instruments because nanoWatt technology supports low-power operating modes while retaining USB, serial, and analog measurement resources. A battery- or bus-powered instrument can wake periodically, read sensors, communicate through USB or another serial interface, and return to a low-power state between measurements. The 48 MHz class processing rate allows event handling and signal conditioning without moving to a larger processor. Actual battery life depends on the selected sleep modes, active duty cycle, USB attachment, analog circuitry, and power-supply efficiency.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PIC18F4550-I/P — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | PIC18F452-I/P | PIC18F4439-I/P |
|---|---|---|---|
| Package | 40-pin DIP (PDIP) | 40-pin DIP | 40-pin DIP |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology |
| Temperature Grade | Industrial grade (-I) | Industrial grade (-I) | Industrial grade (-I) |
Principaux différenciateurs
- Integrated full-speed USB connectivity (vs PIC18F452-I/P)
- Higher documented clock and memory combination (vs PIC18F4439-I/P)
- Multiple communication peripherals in one controller (vs PIC18F452-I/P)
Notes de conception
Place the 40-pin DIP footprint on a grid compatible with the selected socket or direct through-hole assembly process. Confirm pin-1 orientation against the manufacturer package drawing, especially when the board is populated by assembly equipment. Keep USB D+ and D- routing short and controlled, provide the required USB series resistance, and follow the datasheet and USB implementation guidance for connector and protection details.
Route the MCU supply and decoupling network as a compact cluster at the device pins. Place the required bulk and high-frequency capacitors according to the Microchip datasheet, maintaining short ground returns. USB operation adds a separately specified VBUS supply domain, so do not assume that the USB connector supply and the MCU core supply can be combined without checking the device's power architecture and absolute maximum limits.
Assign analog inputs away from switching nodes and high-current return paths, and provide a clean ground reference for the 10-bit ADC. The ESP8266 module requires particular care because RF and digital activity can disturb sensitive analog measurements. Confirm the ADC input range and sample-and-hold requirements from the datasheet before choosing resistor dividers, input protection components, or an external analog front end.
Do not substitute a controller solely because it uses a 40-pin DIP package. The PIC18F4550-I/P combination depends on its particular USB controller, pin multiplexing, memory configuration, oscillator options, and peripheral mapping. Review the complete pin-description table and the device's USB and programming requirements for the alternative. Firmware built for the PIC18F4550 should not be assumed to operate correctly on the PIC18F452-I/P or PIC18F4439-I/P.
Informations de conformité
The reviewed product listings do not explicitly state the requested compliance attributes. The industrial-temperature grade designation identifies the -I variant but does not by itself establish AEC-Q100 qualification.
