DS4520

· 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

· RAM-Based FPGA Bank Switching for Multiple Profiles
· Selecting Between Boot Flash
· Setting ASIC Configurations/Profiles
· Servers
· Network Storage
· Routers
· Telecom Equipment
· PC Peripherals

Voltage on V_CC, SDA, and SCL Pins Relative to Ground......-0.5V to +6.0V
Voltage on A0, A1, A2, and I/O_n [n = 0 to 8]
   Relative to Ground...............-0.5V to (V_CC + 0.5V) not to exceed +6.0V
Operating Temperature Range ........................................-40°C to +85°C
EEPROM Programming Temperature Range ........................0°C to +70°C
Storage Temperature Range .........................................-55°C to +125°C
Soldering Temperature ..............See IPC/JEDEC J-STD-020A Specification

Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

The DS4520 is a 9-bit nonvolatile (NV) I/O expander with 64 bytes of NV user memory controlled by an I²CTMcompatible 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.