DS2432
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DS2432

1Kb Protected 1-Wire EEPROM with SHA-1 Engine

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Info: : PRODUCTION tooltip
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Part Details
Part Models 2
1ku List Price
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Features
  • 1128 Bits of 5V EEPROM Memory Partitioned Into Four Pages of 256 Bits, a 64-Bit Write-Only Secret, and Up to Five General-Purpose Read/Write Registers
  • On-Chip 512-Bit ISO/IEC 10118-3 SHA-1 Engine to Compute 160-Bit Message Authentication Codes (MACs) and to Generate Secrets
  • Write Access Requires Knowledge of the Secret and the Capability of Computing and Transmitting a 160-Bit MAC as Authorization
  • Secret and Data Memory Can Be Write Protected (All or Page 0 Only) or Put in EPROM-Emulation Mode ("Write to 0", Page 1)
  • Unique, Factory-Lasered and Tested 64-Bit Registration Number Assures Absolute Traceability Because No Two Parts Are Alike
  • Built-In Multidrop Controller Ensures Compatibility with Other 1-Wire® Net Products
  • Reduces Control, Address, Data, and Power to a Single Data Pin
  • Directly Connects to a Single Port Pin of a Microprocessor and Communicates at Up to 15.3kbps
  • Overdrive Mode Boosts Communication Speed to 90.9kbps
  • Low-Cost 6-Lead TSOC Surface-Mount Package or Solder-Bumped UCSP™ Package
  • Reads and Writes Over a Wide Voltage Range of 2.8V to 5.25V from -40°C to +85°C
Additional Details
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The DS2432 combines 1024 bits of EEPROM, a 64-bit secret, an 8-byte register/control page with up to five user read/write bytes, a 512-bit SHA-1 engine, and a fully-featured 1-Wire interface in a single chip. Each DS2432 has its own 64-bit ROM registration number that is factory lasered into the chip to provide a guaranteed unique identity for absolute traceability. Data is transferred serially via the 1-Wire protocol, which requires only a single data lead and a ground return. The DS2432 has an additional memory area called the scratchpad that acts as a buffer when writing to the main memory, the register page or when installing a new secret. Data is first written to the scratchpad from where it can be read back. After the data has been verified, a copy scratchpad command will transfer the data to its final memory location, provided that the DS2432 receives a matching 160-Bit MAC. The computation of the MAC involves the secret and additional data stored in the DS2432 including the device's registration number. Only a new secret can be loaded without providing a MAC. The SHA-1 engine can also be activated to compute 160-bit message authentication codes (MAC) when reading a memory page or to compute a new secret, instead of loading it. Applications of the DS2432 include intellectual property security, after-market management of consumables, and tamper-proof data carriers.

Applications

  • Device Authentication
  • IEEE 1451.4 Sensor TEDS
  • Ink/Toner Cartridges
  • Medical Sensors
  • PCB Identification
  • Self-Configuration of Central Office Switches, Wireless Base Stations, PBXs, or other Modular-Based Rack Systems
Complete documentation is available upon completion of a Non-Disclosure Agreement (NDA). To request an NDA, click here.
Part Models 2
1ku List Price
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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
DS2432P+
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DS2432P+T&R
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Product Lifecycle

PCN

Jul 19, 2016

- 1594_AMENDED

ASSEMBLY

DS2432P+

PRODUCTION

DS2432P+T&R

PRODUCTION

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ASSEMBLY

DS2432P+

PRODUCTION

DS2432P+T&R

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 2

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DS9481R-3C7

USB-to-1-Wire/iButton Adapter

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DS9481R-3C7

USB-to-1-Wire/iButton Adapter

USB-to-1-Wire/iButton Adapter

Features and Benefits

  • Driver Support for Windows® 11 and Windows 10 Operating Systems
  • Enumerates as a Virtual PC COM Port by Use of the Prolific PL-2303GC USB-to-UART Bridge IC
  • Emulates the DS2480B 1-Wire Line Driving Functionality
  • 1-Wire OTP/EPROM Programming Provided Without the Need of an External Power Supply (12V on OW, 7V on PULSE)
  • 3.3V Read/Write Operation to 1-Wire/iButton Devices
  • RJ11 Interface for Standard Connectivity Accessories such as the DS9120 Socket Adapter
  • Supports Standard and Overdrive 1-Wire Communication
  • Provides Strong Pullup to 3.3V
  • Fully Compliant with USB 2.0 Specification

Product Detail

The DS9481R is a USB-to-1-Wire adapter for easy PC connectivity to 1-Wire devices. The adapter provides an RJ11 connector with the signals to communicate with all 1-Wire and iButton devices that support a 3.3V data I/O level. Additionally, the adapter provides the support and signaling to program 1-Wire/iButton EEPROM and one-time programmable (OTP)/EPROM devices. To provide a total hardware solution, the DS9481R can readily be used with the DS9120 socket adapter to create a 1-Wire PC programmer for 1-Wire peripheral devices (contact factory for more information). The equivalent peripheral hardware solution for the iButton is the DS1402D-DR8.

DS9090K

1-Wire Device Evaluation Kit Rev B4

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DS9090K

1-Wire Device Evaluation Kit Rev B4

1-Wire Device Evaluation Kit Rev B4

Features and Benefits

Evaluation Kit Contents
  • 1pc. PCB: 1-Wire Device Evaluation Board
  • 1pc. RJ11 male to RJ11 male cable, 7ft
  • 1pc. 1-Wire USB adapter with RJ11 Maxim DS9490R#
  • 1pc. 64-bit silicon serial number (3-pin TO92) Maxim DS2401+
  • 1pc. 1-Wire dual-addressable switch plus 1kb EPROM memory (6-pin TSOC) Maxim DS2406P+
  • 1pc. 1-Wire dual-channel addressable switch (6-pin TSOC) Maxim DS2413P+
  • 1pc. 1024-bit 1-Wire EEPROM (3-pin TO92) Maxim DS2431+
  • 1pc. 4Kb 1-Wire EEPROM (3-pin PR-35) Maxim DS2433+
  • 1pc. 4096-Bit Addressable 1-Wire EEPROM with PIO (on EV kit) Maxim DS28E04S-100+
  • 1pc. 20Kb 1-Wire EEPROM (3-pin TO92) Maxim DS28EC20+
  • 1pc. Package of 11 2-pin shunts for jumpering

Product Detail

The DS9090K provides the hardware and software necessary to evaluate and operate 1-Wire® products in an easy-to-use PC environment. All 1-Wire EEPROM, EPROM, and ROM devices are readable with the DS9090K. All 1-Wire devices with memory or PIO/switches can be written with the DS9090K except 1-Wire EPROM devices*. In this way, the engineer can evaluate 1-Wire chips for potential design purposes or support end-product development activity. Kit operation requires a host PC. Demonstration software consists of the OneWireViewer (a Java program). For 32-bit and 64-bit Windows® operating systems, the OneWireViewer comes as part of the 1-Wire Drivers install package. For other operating systems, refer to the online version of the OneWireViewer.

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