DS5250：High-Speed Secure Microcontroller

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. DS5250 IC data sheet DS5250 revision-specific errata sheet (Click here for availability) High-Speed Microcontroller User's Guide High-Speed Microcontroller User's Guide: DS5250 Supplement

Key Features
  • 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)
Applications/Uses
  • Applications that Require Data Security
  • Financial Terminals
  • PIN Pads
DataSheet
titleDownload file
DS5250 Data SheetDS5250.pdf
Errata DS5250DS5250A2Errata.pdf
Errata DS5250DS5250A3Errata.pdf
Parametrics
Part NumberMCU CoreCore Clock Speed
(MHz)		Data ProcessingInternal SRAM
(KBytes)		USARTsGPIO PinsTimer FeaturesPackage/Pins
maxmax
DS52508051 (CISC)258-bit5238RTC
Watchdog		MQFP/80
MQFP/100
Design kits & evaluation modules
Quality and Environmental Data
Additional Resources
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
DS5250F-125No Longer AvailableDS5250F-125+MQFP,;100 pin;436.2 mm²0°C to +70°CNo
DS5250F-125+ActiveMQFP,;100 pin;436.2 mm²0°C to +70°CLead Free
DS5250F-1N5No Longer AvailableDS5250F-1N5+MQFP,;100 pin;436.2 mm²-40°C to +85°CNo
DS5250F-1N5+ActiveMQFP,;100 pin;436.2 mm²0°C to +70°CLead Free
DS5250F-825No Longer AvailableDS5250F-825+MQFP,;80 pin;436.2 mm²0°C to +70°CNo
DS5250F-825+ActiveMQFP,;80 pin;436.2 mm²0°C to +70°CLead Free
DS5250F-8N5No Longer AvailableDS5250F-8N5+MQFP,;80 pin;436.2 mm²-40°C to +85°CNo
DS5250F-8N5+ActiveMQFP,;80 pin;436.2 mm²-40°C to +85°CLead Free
DS5250.pdf DS5250
DS5250_cn.pdf DS5250
DS5250A2Errata.pdf DS5250
DS5250A3Errata.pdf DS5250
DS5250.pdf DS5250
DS5250.pdf DS5250
High-Speed Microcontroller User's Guide DS87C530
Modulo Exponentiation Timing with the DS5250 Microcontroller DS5250
Interfacing 8051-based Microcontrollers to an SCI Port DS89C450
Using the Keil µVision Debugger with the DS52x0 Secure Microcontrollers DS5250
Using the Keil C Compiler for the DS5250 DS5250
Micro Tutorial 1: Understanding DC Electrical Characteristics of Microcontrollers DS89C450
Configuring Keil PK51 Tools to Support 24-Bit Contiguous Addressing Mode DS80C390
Data Pointer Decrement Feature Simplifies Copy Operation for Overlapping Memory Buffers DS89C450
Implementing a Serial Port FIFO Using Dual Data Pointers DS89C450
8051 Microcontrollers: Frequently Asked Questions DS89C450
Using a EconOscillator™ to Clock an 8051 Microprocessor DS89C450
Design Guidelines for Microcontrollers Incorporating NV RAM DS87C530
High-Speed Micro Memory Interface Timing DS87C530
Using the DS87C530/DS5250 Real-Time Clock DS87C530
Using Power Management with High-Speed Microcontrollers DS89C450
Using the High-Speed Micro's Serial Ports DS89C450
DS5250.pdf DS5250
高速微控制器用户指南 DS87C530
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