DS2401A+

Specialized ICS Overview

The DS2401A+ is a silicon serial number IC providing a guaranteed unique 64-bit ROM ID for absolute traceability. It features an 8-bit family code, a 48-bit serial number, and an 8-bit CRC tester. The device utilizes a minimalist 1-Wire interface requiring only a single data pin and ground return, with power derived from the data line itself. Operating within a voltage range of 3V to 5.25V and an industrial temperature range of -40°C to +85°C, it supports communication speeds up to 16.3kbps. The component is housed in a TO-92-3 through-hole package.

Specialized ICS Feature Summary

• Guaranteed Unique 64-Bit ROM ID: Includes 8-bit Family Code (01h), 48-bit Serial Number, and 8-bit CRC.
• Minimalist 1-Wire Interface: Reduces control, address, data, and power requirements to a single pin.
• Bus-Powered Operation: Zero standby power required; power is derived directly from the data line.
• Multidrop Capability: Built-in controller ensures compatibility with other 1-Wire net products on a common bus.

Specialized ICS Applications

• PCB Identification
• Network Node ID
• Equipment Registration

Specialized ICS Procurement Notes

Verify the specific ordering suffix against the manufacturer's current catalog to confirm lead-free/RoHS compliance status. Confirm that the selected package variant matches the required lead configuration (formed vs. straight) for the intended PCB assembly process. Ensure the pullup resistor value aligns with the DS2401A electrical characteristics for optimal signal integrity.

Specialized ICS Selection Notes

Select the DS2401A+ over the standard DS2401 when a lower pullup resistance is required or desired for faster rise times, as the A-version specifies a recommended pullup range of 300Ω to 2.2kΩ compared to 1.5kΩ to 5kΩ for the standard version. Note that the DS2401A does not support the legacy Read ROM command byte (0Fh) used by the DS2400. Verify multidrop bus behavior if using Match ROM or Skip ROM commands, as the DS2401A responds to these unlike the standard DS2401.

Specialized ICS Part Context

The DS2401A+ is part of the DS2401 enhanced silicon serial number series from Analog Devices/Maxim Integrated. It serves as an upgrade to the DS2400, offering full reverse-compatibility while adding multidrop capability. The 'A' suffix denotes specific electrical characteristics regarding pullup resistance and logic thresholds, distinguishing it from the base DS2401 model within the same product family.

Specialized ICS Replacement Considerations

The DS2401+ is the primary functional equivalent but requires different pullup resistor values (1.5kΩ–5kΩ). The DS2400 is compatible via the legacy 0Fh command but lacks multidrop support. No direct drop-in replacement exists without verifying pullup resistor adjustments and command set compatibility.