DS4520 Datasheet | Maxim Integrated

Description The DS4520 is a 9-bit nonvolatile (NV) I/O expander with 64 bytes of NV user memory controlled by an I2Cpatible 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 12m A. 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. Applications - - RAM-Based FPGA Bank Switching for Multiple Profiles - - Selecting Between Boot Flash - - Setting ASIC Configurations/Profiles - - Servers - - Network Storage - - Routers - - Tele Equipment - - PC Peripherals Typical Operating Circuit Features - Programmable Replacement for Mechanical Jumpers and Switches - Nine NV Input/Output Pins - 64-Byte NV User Memory (EEPROM) - I2C-patible Serial Interface - Up to 8 Devices Can be Multidropped on the Same I2C Bus - Open-Drain Outputs with Configurable Pullups - Outputs Capable of Sinking 12m A - Low Power Consumption - Wide Operating Voltage (2.7V to 5.5V) - Operating Temperature Range: -40°C to +85°C Ordering Information PART TEMP RANGE DS4520E+ -40°C to +85°C Add “TRL” for tape and reel orders. PIN-PACKAGE 16 TSSOP Pin Configuration 0.1µF 4.7kΩ FROM SYSTEM CONTROLLER VCC 4.7kΩ I/O_0 I/O_1 SCL I/O_2 SDA I/O_3 I/O_4 A0 I/O_5 A1...