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

Product Details

Key Features

Parametric specs for I/O Port Expanders
Inputs 9
Interface Serial - I2C Compatible
Outputs 9
I/O 9
Drive Current (mA) 16
VSUPPLY (V) (min) 2.7
VSUPPLY (V) (max) 5.5
Package/Pins TSSOP/20
Budgetary
Price (See Notes)
2.68
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Simplified Block Diagram

Technical Docs

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Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.

Parameters

Parametric specs for I/O Port Expanders
Inputs 9
Interface Serial - I2C Compatible
Outputs 9
I/O 9
Drive Current (mA) 16
VSUPPLY (V) (min) 2.7
VSUPPLY (V) (max) 5.5
Package/Pins TSSOP/20
Budgetary
Price (See Notes)
2.68

Key Features

  • 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

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

Description

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.

Simplified Block Diagram

DS4550: Typical Operating Circuit DS4550: Typical Operating Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.