DS2408 - Maxim Integrated

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

DS2408
Manufacturer

Maxim Integrated
ChipWorker Part#

CW1208132735
Package

SOIC
Description

1-Wire 8Channel Addressable Switch8Channel, Bidirectional Port Expander can be Powered and Operated from a Single Communication Line
Documentation

Datasheet

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DS2408 Specifications

Attribute	Attribute Value

Part Number	DS2408
Manufacturer	Maxim Integrated
ChipWorker Part#	CW1208132735
Documentation	Datasheet
Case/Package	SOIC
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RoHS	RoHS Compliant

Product Description

Description
The DS2408 is an 8-channel, programmable I/O 1-Wire® chip. PIO outputs are configured as open-drain and provide an on resistance of 100Ω max. A robust PIO channel-access communication protocol ensures that PIO output-setting changes occur error-free. A data-valid strobe output can be used to latch PIO logic states into external circuitry such as a D/A converter (DAC) or microcontroller data bus.
DS2408 operation is controlled over the single-conductor 1-Wire bus. Device communication follows the standard Dallas Semiconductor 1-Wire protocol. Each DS2408 has its own unalterable and unique 64-bit ROM registration number that is factory lasered into the chip. The registration number guarantees unique identification and is used to address the device in a multidrop 1-Wire net environment. Multiple DS2408 devices can reside on a common 1-Wire bus and can operate independently of each other. The DS2408 also supports 1-Wire conditional search capability based on PIO conditions or power-on-reset activity; the conditions to cause participation in the conditional search are programmable. The DS2408 has an optional VCC supply connection. When an external supply is absent, device power is supplied parasitically from the 1-Wire bus. When an external supply is present, PIO states are maintained in the absence of the 1-Wire bus power source. The RSTZ signal is configurable to serve as either a hard-wired reset for the PIO output or as a strobe for external circuitry to indicate that a PIO write or PIO read has completed.

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