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AW9535TSR

AW9535/AW9555 16-Bit I2C and SMBus I/O Expander with Interrupt Output and Configuration Registers

Datasheet :
Preview - AW9535TSR - Datasheet

Product details

Parameters

Channel 16
Addresses 8
Reset ×
Constant Current ×
Pull-up √
Level Shift ×
Temperature -40℃~105℃
Power Supply (Min) (V) 1.65
Power Supply (Max) (V) 5.5
Package (mm) TSSOP-24L

Package | Pins | Size

TSSOP-24L

Features

1 16-bit I/O expander 2 I2C bus and SMBus compatible 3 Open-drain active-low interrupt output 4 400kHz I2C interface 5 1.65V~5.5V power supply 6 Configurable slave address with 3 address pins 7 Polarity inversion register 8 Low standby current consumption of 0.7μA (typical at 3.3V VCC) 9 No glitch on power-up 10 5.5V tolerant I/O ports 11 Noise filter on SCL/SDA inputs 12 Latched outputs with high-current drive capability for directly driving LEDs 13 Each I/O can be configured as an input or an output independently, default input 1) AW9555: I/O ports with an internal weak pull-up resistors 2) AW9535: I/O ports without an internal weak pull-up resistors 14 Operation temperature range: -40°C~105°C 15 Package 1) AW9535QNR: QFN 4X4-24L 2) AW9535TSR: TSSOP-24L 3) AW9555TSR: TSSOP-24L 4) AW9555QNR: QFN 4X4-24L

Description

AW9535/AW9555 is a 16-bit I/O expander that can be controlled through the I2C bus. It provides general-purpose remote I/O expansion for most microcontroller families via the I2C interface. The AW9535/AW9555 consists of two 8-bit Configuration (input or output selection), Input Port, Output Port, and Polarity Inversion (active high or active low operation) registers. At power on, all the 16 I/O ports are configured as inputs. The system master can configure each I/O as an input or an output independently by writing to the I/O configuration bits. The data for each input or output is kept in the corresponding Input or Output register. The Polarity Inversion register can invert the polarity of the Input Port register. The AW9535/AW9555 open-drain interrupt output is activated when any input state differs from its corresponding input port register state and is used to indicate to the system master that an input state has changed. The power-on reset sets the registers to their default values and initializes the device state machine. Three hardware pins (A0, A1, A2) vary the fixed I2C-bus address and allow up to eight devices to share the same I2C-bus/SMBus. All I/O pins are 5V tolerant. The AW9535 is identical to the AW9555, except for the removal of the internal I/O pull-up resistor, which greatly reduces power consumption when the I/Os are held low.

Technical documentation
Type
Title
Language
Date
Product Design Guide AW95xx Software Design Guide 英文   2025-07-23
Datasheet DS_AW9535_AW9555_EN_V1.6 英文   2026-06-24

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

Evaluation board

AW9555_9535_9539_EVB_V1.0 — AW9555_9535_EVB_V1.0 is evaluation board for 16-bit I2C and SMBus I/O expanders with interrupt output and configuration registers. It provides general-purpose remote I/O expansion for most microcontroller series through the I2C interface.

EVB evaluation board for 16-bit I2C and SMBus I/O expanders.

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Software development

DRIVER OR LIBRARY

AW95XX_Driver — MCU Driver for AW95XX

MCU driver for AW95XX series，includeing sample code,porting guide.

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DRIVER OR LIBRARY

AW95XX_Drivers — Android and other drivers for AW95XX series

Android and other drivers for AW95XX series, including example code, porting guide, debugging guide, etc

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APPLICATION SOFTWARE&FRAMEWORK

AW95XX_GUI — AW95XX Tunning Tool

AW95XX GUI is a highly integrated and easy-to-use tool for product configuration and debugging. Intuitive interface and use-friendly operation can help customers shorten development time and complete system integration quickly.

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Hardware development

Evaluation board

AW9555_9535_9539_EVB_V1.0 — AW9555_9535_EVB_V1.0 is evaluation board for 16-bit I2C and SMBus I/O expanders with interrupt output and configuration registers. It provides general-purpose remote I/O expansion for most microcontroller series through the I2C interface.

EVB evaluation board for 16-bit I2C and SMBus I/O expanders.

View options
Software development

DRIVER OR LIBRARY

AW95XX_Driver — MCU Driver for AW95XX

MCU driver for AW95XX series，includeing sample code,porting guide.

View options

DRIVER OR LIBRARY

AW95XX_Drivers — Android and other drivers for AW95XX series

Android and other drivers for AW95XX series, including example code, porting guide, debugging guide, etc

View options

APPLICATION SOFTWARE&FRAMEWORK

AW95XX_GUI — AW95XX Tunning Tool

AW95XX GUI is a highly integrated and easy-to-use tool for product configuration and debugging. Intuitive interface and use-friendly operation can help customers shorten development time and complete system integration quickly.

View options