GXA9555

1 Key Specifications

• Direct drop-in replacement for xCA9555
• Supply Voltage: 1.6 V ~ 5.5 V
• Operating Temperature: -55 °C ~ +125 °C
• Standby Current: 0.5 µA
• Direct LED drive capability
• Open-drain interrupt output pin

2 Applications

• Servers
• Communication Cabinets
• Industrial Automation Equipment
• Products with limited GPIO resources on the processor

3 Product Overview

GXA9555 is designed for general-purpose input/output (GPIO) port expansion. Port data is transmitted via the standard 2-wire I²C protocol with a maximum communication rate of 1 MHz (up to 2 MHz when high-speed mode is enabled).

GXA9555 features 16 push-pull GPIO ports capable of directly driving LEDs. Each GPIO bit can be individually configured as an input or output, with input as the default state after power-up.

Each port of GXA9555 integrates a 100 kΩ weak pull-up resistor to set a default high logic level for every GPIO pin.

Package Information

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