PIC18F2455/2550/4455/4550 Data Sheet - 28/40/44-Pin - High-Performance, Enhanced Flash, USB Microcontrollers with nanoWatt Technology

Oct 14, 2026

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PIC18F2455/2550/4455/4550 data sheet covering 28/40/44-pin USB microcontrollers built for high performance with enhanced flash and nanoWatt power characteristics. Describes USB 2.0 features including low/full speed transfers, endpoint support, dual access RAM, and on-chip USB transceiver/voltage regulation. Summarizes power-managed modes and oscillator structures, including low-current sleep/idle figures and fail-safe clock monitoring. Includes code protection, warranty disclaimers, trademark notices, and quality system certification statements.

LanguageEnglish

CategoryPaper Templates

FormatPDF

Pages430

Reading Time2 h 31 min

AccessFree to download

PIC18F2455/2550/4455/4550 Data Sheet

USB and system features overview

Power-managed modes and oscillator structure

Code protection, legal notices, and trademarks

PIC18F2455/2550/4455/4550 Data Sheet 28/40/44-Pin, High-Performance, Enhanced Flash, USB Microcontrollers with nanoWatt Technology | | | | --- | --- | | Note the following details of the code protection feature on Microchip devices:
• Microchip products meet the specification contained in their particular Microchip Data Sheet.
• Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions.
• There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data Sheets. Most likely, the person doing so is engaged in theft of intellectual property.
• Microchip is willing to work with the customer who is concerned about the integrity of their code.
• Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not mean that we are guaranteeing the product as “unbreakable.”
Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act. | | | Information contained in this publication regarding device applications and the like is provided only for your convenience and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. MICROCHIP MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED, WRITTEN OR ORAL, STATUTORY OR OTHERWISE, RELATED TO THE INFORMATION, INCLUDING BUT NOT LIMITED TO ITS CONDITION, QUALITY, PERFORMANCE, MERCHANTABILITY OR FITNESS FOR PURPOSE. Microchip disclaims all liability arising from this information and its use. Use of Microchip devices in life support and/or safety applications is entirely at the buyer’s risk, and the buyer agrees to defend, indemnify and hold harmless Microchip from any and all damages, claims, suits, or expenses resulting from such use. No licenses are conveyed, implicitly or otherwise, under any Microchip intellectual property rights.
| Trademarks
The Microchip name and logo, the Microchip logo, Accuron, dsPIC, KEELOQ , microID, MPLAB, PIC, PICmicro, PICSTART, PRO MATE, PowerSmart, rfPIC and SmartShunt are registered trademarks of Microchip Technology Incorporated in the U. S.A. and other countries.
AmpLab, FilterLab, Migratable Memory, MXDEV, MXLAB, PICMASTER, SEEVAL, SmartSensor and The Embedded Control Solutions Company are registered trademarks of Microchip Technology Incorporated in the U.S.A.
Analog-for-the-Digital Age, Application Maestro, dsPICDEM, [dsPICDEM.net](dsPICDEM.net), dsPICworks, ECAN, ECONOMONITOR, FanSense, FlexROM, fuzzyLAB, In-Circuit Serial Programming, ICSP, ICEPIC, Linear Active Thermistor, MPASM, MPLIB, MPLINK, MPSIM, PICkit, PICDEM, [PICDEM.net](PICDEM.net), PICLAB, PICtail, PowerCal, PowerInfo, PowerMate, PowerTool, Real ICE, rfLAB, rfPICDEM, Select Mode, Smart Serial, SmartTel, Total Endurance, UNI/O, WiperLock and Zena are trademarks of Microchip Technology Incorporated in the U. S.A. and other countries.
SQTP is a service mark of Microchip Technology Incorporated in the U.S.A.
All other trademarks mentioned herein are property of their respective companies.
© 2006, Microchip Technology Incorporated, Printed in the
U.S.A. , All Rights Reserved.
Printed on recycled paper.
Microchip received ISO/TS-16949:2002 quality system certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona and Mounta

FAQs

What USB capabilities are listed for these PIC18 microcontrollers?

The sheet states USB V2.0 compliance with low-speed and full-speed support, and it supports control, interrupt, isochronous, and bulk transfers. It also notes support for up to 32 endpoints and includes an on-chip USB transceiver with voltage regulator.

Which low-power modes and current figures are provided?

Run, Idle, and Sleep modes are described, with typical idle mode current down to 5.8 μA and typical sleep mode current down to 0.1 μA. It also lists Timer1 oscillator and watchdog timer typical current values.

Does the document guarantee code security?

No. It explains that neither Microchip nor other semiconductor manufacturers can guarantee code security, and code protection is not synonymous with an unbreakable product. It also states that attempts to break protection may violate the Digital Millennium Copyright Act.

Oct 14, 2026

Upload by Ezra