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GENERAL DESCRIPTION

The DS2413 is a dual-channel programmable I/O 1-Wire? chip. The PIO outputs are configured as open drain and provide up to 20mA continuous sink capability and off-state operating voltage up to 28V. Control and sensing of the PIO pins is performed with a dedicated device-level command protocol. To provide a high level of fault tolerance in the end application, the 1-Wire IO and PIO pins are all capable of withstanding continuous application of voltages up to 28V max. Communication and operation of the DS2413 is performed with the single contact Maxim/Dallas 1-Wire serial interface.

FEATURES

■ Open-Drain Programmable I/O Pins

■ PIO Pins Support 20mA max Continuous Current Sink

■ Supports 28V (max) PIO Pin Operating Voltage

■ On-Resistance of PIO Pulldown Transistor 20Ω max; OFF Resistance 1MΩ min

■ Parasitic Power Supply Through 1-Wire

■ Communicates to Host with a Single Digital Signal at 14.9kb or 100kbps Using 1-Wire Protocol

■ Unique 64-bit ROM Serial Number Factory Lasered Into Each Device

■ Switchpoint Hysteresis and Filtering to Optimize Performance in the Presence of Noise

■ 1-Wire IO Pin Supports 28V Absolute Maximum DC Level for Fault Conditions

■ Operates Over a Wide 1-Wire Voltage Range of 2.8V to 5.25V from 0°C to +70°C

■ High ESD Immunity of 1-Wire IO Pin: 8kV HBM Typical

■ TSOC and TDFN Packages Available

APPLICATIONS

■ LED Control

■ Accessory Identification and Control

■ General Purpose Input/Output

■ Key-Pick Systems

■ Industrial Controllers

■ System Monitoring

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