Overview

Features and Benefits

  • Feature-Rich, 8051-Compatible Microprocessor
    • Accesses Up to 4MB Program and 4MB Data Memory (All Nonvolatile)
    • In-System Programmable Through Serial Port
    • In-Application Programmable Through User Software Allows Self-Modification of Program/Data Memory
    • Four 8-Bit Ports/One 6-Bit Port
    • Three 16-Bit Timer/Counters
    • 256 Bytes of Scratchpad RAM
  • Advanced Features
    • CRC-16/32 Generator
    • 5KB Internal SRAM (Optional 1KB Stack)
    • Single or 3DES Engine
    • Partitionable Memory Segments Variable from 4KB to 256KB
  • High-Speed Architecture
    • Four Clocks-per-Machine Cycle
    • DC-to-25MHz Operation
    • Single-Cycle Instruction in 160ns
    • Dual Data Pointers Can Increment or Decrement Independently
    • Automatic Data Pointer (DPTR) Selection Available
    • Programmable Speed MOVX Instructions
    • 1KB On-Chip Instruction Cache
  • High-Reliability Operation
    • Power-Fail/Overvoltage Reset
    • Early-Warning Power-Fail Interrupt
    • Watchdog Timer
  • Nonvolatile Functions
    • On-Chip Real-Time Clock with Alarm Interrupt
    • 2KB Battery-Backed Internal SRAM
  • Interrupts
    • 15 Interrupts with Seven External Sources
  • Security Features
    • Executes Single/3DES-Encrypted Programs to Prevent Observation
    • Two Self-Destruct Inputs
    • 4096-Bit Modulo-Arithmetic Accelerator (MAA) for Public/Private Key Operations
    • Tamper Sensors Detect Thermal/Voltage/Probe Attacks
    • Programmable Attack Countermeasures
    • Secure-Loader Mode
    • True Random-Number Generator (RNG)
    • Unique ID Number in Every Device
    • Separate Program/Data Cryptograph
    • Program Memory Integrity Checking
  • Evaluation Kit Available (DS5250-KIT)

Product Details

The DS5250 is a highly secure, four clocks-per-machine cycle, 100% 8051-instruction-set-compatible microprocessor in Maxim's secure microcontroller family. It was designed to be the cryptographic engine of PIN pads, financial terminals, and any other application in which data security is paramount. A key feature of the device is that it encrypts its program memory and optionally its data memory with a hardware-based single-or triple-DES (data encryption standard) algorithm, making it almost impossible to extract information. It also implements block cipher encoding that uses block addresses to modify the encrypted data, further strengthening security. This makes the device ideal for storage and transmission of passwords, personal identification numbers, encryption keys, and other highly confidential information.

Note: Designers must have the following documents to fully use all the features of this device. This data sheet contains pin descriptions, feature overviews, and electrical specifications. Errata sheets contain deviations from published specifications. The user's guides offer detailed information about device features and operation.

Applications

  • Applications that Require Data Security
  • Financial Terminals
  • PIN Pads

Product Categories

Complete documentation is available upon completion of a Non-Disclosure Agreement (NDA). To request an NDA, click here.

Product Lifecycle icon-not-recommended Last Time Buy

All products in this family will be obsolete soon. Please contact ADI Sales or Distributors to arrange for final purchases and read our Obsolescence Information to review the time periods for placing final orders and receiving final shipments.

Evaluation Kits (1)

Documentation & Resources

  • View All (31)
  • Data Sheets (1)
  • Reliability Data (1)
  • User Guides (3)
  • Application Notes (8)
  • Design Notes (5)
  • Technical Articles (13)
  • Application Notes
    Technical Articles

    Design Resources

    ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

    Sample & Buy


    Ordering FAQs


    See our Ordering FAQs for answers to questions about online orders, payment options and more.

     

    Buy Now Pricing


    (**) Displayed Buy Now Price and Price Range is based on small quantity orders.

     

    List Pricing


    (*)The 1Ku list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

     

    Sampling


    Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.


    Price Table Help