DS4550

PRODUCTION

I2C and JTAG Nonvolatile 9-Bit I/O Expander Plus Memory

Data Sheet (Rev. 1) Product Selection Table
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Overview

  • Programmable Replacement for Mechanical Jumpers and Switches
  • Nine NV Inputs/Outputs
  • 64-Byte NV User Memory (EEPROM)
  • I2C-Compatible Serial Interface and JTAG
  • Up to 8 Devices can be Multidropped on the Same I²C Bus
  • Open-Drain Outputs with Configurable Pullups
  • Outputs Capable of Sinking 16mA
  • Low Power Consumption
  • Wide Operating Voltage Range: 2.7V to 5.5V
  • Operating Temperature Range: -40°C to +85°C

The DS4550 is a 9-bit, nonvolatile (NV) I/O expander with 64 bytes of NV user memory controlled by either an I2C-compatible serial interface or JTAG port. The DS4550 offers a digitally programmable alternative to hardware jumpers and mechanical switches that are being used to control digital logic nodes. Each I/O pin is independently configurable. The outputs are open drain with selectable pullups. Each output has the ability to sink up to 16mA, and since the device is NV, it powers up in the desired state allowing it to control digital logic inputs immediately on powerup without having to wait for the host CPU to initiate control.

Applications

  • 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
DS4550
I2C and JTAG Nonvolatile 9-Bit I/O Expander Plus Memory
DS4550: Typical Operating Circuit
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Documentation

Data Sheet 1

Reliability Data 1

Design Note 1

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Hardware Ecosystem

Parts Product Life Cycle Description
I/O Expanders 1
DS4520
PRODUCTION 9-Bit I²C Nonvolatile I/O Expander Plus Memory
LED Drivers 1
DS4510
PRODUCTION CPU Supervisor with Nonvolatile Memory and Programmable I/O
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Tools & Simulations

IBIS Model 1

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