NXP 8-Bit I/O Expander I2C TSSOP-16

The NXP 8-Bit I/O Expander I2C TSSOP-16 adds 8 configurable I/O ports through a single I2C interface, freeing up microcontroller pins in systems that require additional General-Purpose Input/Output (GPIO) capacity.

Overview

This integrated circuit provides remote I/O expansion for a wide range of microcontroller families via the industry-standard I2C-bus interface. It offers a simple and effective solution for designs that need extra GPIO pins while keeping the interconnection footprint minimal.

Key Features

• Integrated level shifting: Removes the need for external components when interfacing between different voltage domains. The dual power rail VDD range of 1.65 V to 5.5 V supports communication between processors and I/O devices operating at different voltage levels.
• Schmitt-trigger inputs: Improve noise immunity and tolerance to slow input transitions.
• Interrupt handling: Features an open-drain, active-low interrupt output (INT) with a maskable interrupt-on-change and a read-only register to identify the interrupt source.
• High drive capability: Latched outputs can sink or source up to 25 mA, sufficient for directly driving LEDs.
• Flexible configuration: Power-up default sets all channels as inputs with no glitch. Outputs can be configured as push-pull or open-drain on a per-bank basis.
• Input stability: Input port register values are latched until read.

Specifications

• Interface: I2C
• I/O Ports: 8
• Package: TSSOP-16
• Dimensions (Width x Depth x Height): 3.3 x 1.5 x 4.3
• Weight: 0.151 gm

Applications

The device suits systems that need extra GPIO pins, level shifting between 1.65 V and 5.5 V voltage domains, or interrupt-driven input monitoring over I2C. Select this NXP 8-Bit I/O Expander when a design requires remote I/O expansion without a large number of additional interconnections.