DS2405P+T&R

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The DS2405P+T&R is an interface chip used to interface between digital logic and an external I2C/SMBus or bidirectional 1-Wire digital serial data bus. The DS2405P+T&R reduces design complexity by combining both a bidirectional 1-Wire slave and I2C/SMBus master transaction engine in the same chip. This enables a single chip to both receive and transmit digital data between two compatible digital systems.

A design that requires an I2C/SMBus master to exchange data with a 1-Wire bus slave device can now be implemented with only a single chip like the DS2405P+T&R. This removes the need to use multiple chips and the pins to connect them, while increasing design efficiency and system performance. The DS2405P+T&R is especially applicable in device configuration, diagnostics, and communication applications.

The DS2405P+T&R has two primary sections. The first section is the 1-Wire port, which is used to configure the bus protocol and receive data. This section uses NRZE pulse waveforms to both control and read the data, and is compatible with the open-collector architecture used in the DS2401 slave device. The second section is the I2C/SMBus master port, which is used to send data to the slave devices on the 1-Wire bus.

The I2C/SMBus port features a dual-function interface that offers bidirectional communication with the slave devices. This port supports a standard SMBus/I2C bus protocol, with support for the SMBus command codes, acknowledge sequences, and repeat start conditions. The IP pins, 1 to 6, can also be used to support the ad hoc 1-wire protocol of the DS2401 and DS2402 slave devices.

The DS2405P+T&R also includes several power-management features that reduce power consumption. These include an integrated voltage regulator that reduces the CPU required current at full-load, as well as several sleep modes that can provide higher power savings when the device is not being used. The device also includes a watchdog timer to reset the systems to a known state if they hang or crash and the ability to monitor temperature and detect overheating.

In addition to its UI components, the DS2405P+T&R also includes a set of EEPROM and FLASH memory components that can be used to store data, configuration, and other information. These components can be used to store and recall application settings, or as part of a secure network for authentication and encryption. The EEPROM and FLASH memory components can also be used to store software or firmware updates.

The DS2405P+T&R is a versatile and compact solution for interfacing between digital logic and an external data bus. Used in the proper application and configuration, it can reduce the complexity of a design and improve system performance. Whether used for simple device configuration, secure network access, or for a more complex data communication scenario, the advanced features of the DS2405P+T&R make it an ideal choice.

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