DS2401

Specialized ICS Overview

The DS2401 is a silicon serial number integrated circuit providing a guaranteed unique 64-bit registration number for absolute traceability. It utilizes the 1-Wire interface, requiring only a single data lead and ground return for communication at speeds up to 16.3kbps. The device operates within an extended voltage range of 2.8V to 6.0V and supports an industrial temperature range from -40°C to +85°C. Power is derived directly from the data line, eliminating the need for external power sources or standby current. The 64-bit ROM comprises an 8-bit family code (01h), a 48-bit unique serial number, and an 8-bit CRC checksum.

Specialized ICS Feature Summary

• Guaranteed Unique 64-Bit ROM ID with 8-Bit Family Code, 48-Bit Serial Number, and 8-Bit CRC
• Minimalist 1-Wire Interface Reduces Interface Complexity to a Single Pin
• Built-In Multidrop Controller Ensures Compatibility with Other 1-Wire Network Products
• Zero Standby Power Required; Operates on Voltage Range of 2.8V to 6.0V

Specialized ICS Applications

• PCB Identification
• Network Node ID
• Equipment Registration

Specialized ICS Procurement Notes

Verify the specific package variant required, such as TO-92, SOT-223, or TSOC, as electrical characteristics like pullup resistance ranges differ between standard and 'A' suffix versions. Confirm RoHS compliance status based on the ordering suffix (+ or #). Ensure the bus controller circuit includes an appropriate pullup resistor, typically 5kΩ for the DS2401, to maintain signal integrity during 1-Wire transactions.

Specialized ICS Selection Notes

Select the DS2401 when a low-cost, unique electronic registration number is needed with minimal microcontroller port usage. Choose this component over the DS2400 for enhanced multi-drop capability allowing multiple devices on one bus. Consider the DS2401A variant if lower pullup resistance values are necessary for specific bus load conditions. Verify that the application environment falls within the specified -40°C to +85°C operating temperature range.

Specialized ICS Part Context

The DS2401 serves as an upgrade to the DS2400, offering full reverse compatibility while adding support for multidrop configurations on a single data line. It belongs to the DS2401 series of security and authentication ICs manufactured by Analog Devices/Maxim Integrated. The device functions as a peripheral in a 1-Wire bus system, providing absolute identity without additional memory or complex interfaces.

Specialized ICS Replacement Considerations

The DS2400 is fully compatible but lacks multi-drop support. The DS2401A+ offers alternative electrical characteristics suitable for different pullup requirements. For custom serial numbers, the DS2401X-S+ or DS2401X1-S#T variants allow customer-defined bits within the 48-bit field.