Addressable Switch

Part Number	Status	Replacement	Explanation
DS2405	This product is No Longer Available. See Ordering Information for recommended replacements.	DS2413	The DS2405 is no longer available. The 1-Wire DS2413 with 2-CH GPIO functionality is recommended as a replacement.

The DS2405 Addressable Switch is an open drain N-channel transistor that can be turned on or off by matching the 64-bit factory-lasered registration number within each part. The 64-bit number consists of an 8-bit family code, a unique 48-bit serial number, and an 8-bit cyclic redundancy check. Communication with the DS2405 follows the standard Dallas Semiconductor 1-Wire protocol and can be accomplished with a single port pin of a microcontroller. Multiple DS2405 devices can reside on a common 1-Wire bus creating a MicroLAN. The network controller circuitry is embedded within the chip including a search algorithm to determine the identity of each DS2405 on the network. The open drain output (PIO pin) for each DS2405 on the MicroLan can be independently toggled on or off whether there is one or many devices sharing the same 1-Wire bus. The logic level of the PIO pin for each device on the MicroLan can also be individually sensed and reported to the bus master.

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