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DS4520：9-Bit I²C Nonvolatile I/O Expander Plus Memory

9-Channel, Nonvolatile Port Expander Integrates User-EEPROM

The DS4520 is a 9-bit nonvolatile (NV) I/O expander with 64 bytes of NV user memory controlled by an I²C-compatible serial interface. The DS4520 offers users a digitally programmable alternative to hardware jumpers and mechanical switches that are being used to control digital logic nodes. Furthermore,the digital state of each pin can be read through the serial interface. Each I/O pin is independently configurable. The outputs are open drain with selectable pullups. Each output has the ability to sink up to 12mA. Since the device is NV, it powers up in the desired state allowing it to control digital logic inputs immediately on power-up without having to wait for the host CPU to initiate control.

Key Features Programmable Replacement for Mechanical Jumpers and Switches Nine NV Input/Output Pins 64-Byte NV User Memory (EEPROM) I²C-Compatible Serial Interface Up to 8 Devices Can be Multidropped on the Same I²C Bus Open-Drain Outputs with Configurable Pullups Outputs Capable of Sinking 12mA Low Power Consumption Wide Operating Voltage (2.7V to 5.5V) Operating Temperature Range: -40°C to +85°C

DS4520: Typical Operating Circuit Applications/Uses Network Storage PC Peripherals RAM-Based FPGA Bank Switching for Multiple Profiles Routers/Switches Selecting Between Boot Flash Servers Setting ASIC Configurations/Profiles Telecom Equipment

DataSheet

Parametrics

Quality and Environmental Data

• DS4520.pdf

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