QuickView - DS4550 I²C and JTAG Nonvolatile 9-Bit I/O Expander Plus Memory

Description

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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 an IEEE® 1149.1 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.

Key Features

Applications/Uses

	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
	IEEE 1149.1 Boundary Scan Compliant
	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

	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