DS2502/T&R

Product Overview

• Category: Electronic Component
• Use: Identification and Authentication
• Characteristics: Unique Serial Number, Non-Volatile Memory, Small Package Size
• Package: SOT-23
• Essence: Integrated Circuit (IC)
• Packaging/Quantity: Tape & Reel (T&R), 3000 units per reel

Specifications

• Memory Size: 1Kbit
• Communication Interface: 1-Wire
• Operating Voltage: 2.8V to 6.0V
• Temperature Range: -40°C to +85°C
• Data Retention: Up to 10 years
• Write Endurance: 500,000 cycles

Detailed Pin Configuration

The DS2502/T&R has a total of three pins:

1. VCC: Power supply pin (+2.8V to +6.0V)
2. GND: Ground pin (0V reference)
3. DQ: 1-Wire data communication pin

Functional Features

• Unique Serial Number: Each DS2502/T&R IC has a factory-programmed, globally unique 64-bit serial number.
• Non-Volatile Memory: The IC features a 1Kbit EEPROM memory that can be read from or written to using the 1-Wire interface.
• Small Package Size: The SOT-23 package allows for compact integration into various electronic devices.

Advantages and Disadvantages

Advantages

• Secure Identification: The unique serial number ensures reliable identification and authentication of the device.
• Easy Integration: The 1-Wire interface simplifies the connection and control of the DS2502/T&R with other devices.
• Compact Design: The small package size enables space-saving integration in electronic systems.

Disadvantages

• Limited Memory: The 1Kbit memory size may be insufficient for certain applications requiring larger storage capacity.
• Single Communication Interface: The DS2502/T&R only supports the 1-Wire communication protocol, limiting compatibility with other interfaces.

Working Principles

The DS2502/T&R operates based on the 1-Wire communication protocol. It uses a single data line (DQ) for both power supply and bidirectional data transfer. The IC is powered by the VCC pin and communicates with the host device through the DQ pin using a unique serial number and commands.

Detailed Application Field Plans

The DS2502/T&R finds applications in various fields, including:

1. Asset Tracking: The unique serial number allows for easy identification and tracking of assets in logistics and supply chain management.
2. Product Authentication: The IC can be used to authenticate genuine products, preventing counterfeiting and ensuring customer trust.
3. Access Control: The DS2502/T&R can be integrated into access control systems for secure identification and authorization purposes.
4. Medical Devices: The small package size makes it suitable for integration into medical devices, enabling traceability and authentication.

Detailed and Complete Alternative Models

1. DS2401: Similar to DS2502/T&R but with an 8-bit family code instead of a 64-bit serial number.
2. DS2431: Offers a larger memory size of 1024 bits compared to the 1Kbit of DS2502/T&R.
3. DS28E05: Provides additional features like a SHA-1 engine for cryptographic functions and a 112-bit user-programmable EEPROM.

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