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

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 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

DS4550: Typical Operating Circuit 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

DataSheet

Parametrics

Quality and Environmental Data

• DS4550.pdf

Related Products

• DS4520：9-Bit I²C Nonvolatile I/O Expander Plus Memory
• DS4510：CPU Supervisor with Nonvolatile Memory and Programmable I/O

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