TCA9536ADTMR集成电路（IC）的I/O扩展器规格书PDF中文资料

TCA9536ADTMR属于集成电路（IC）的I/O扩展器。由德州仪器制造生产的TCA9536ADTMRI/O 扩展器该系列器件可与微控制器、微处理器或类似器件结合使用，目的是增加可用于连接外设的信号连接数量。典型的工作概念涉及使用串行通信，只需主机设备上的几根 I/O 线，即可读/写扩展器设备上的许多输入/输出引脚的状态。该技术的通信速度不佳，但连通性较高，最适合快速响应不是很关键的应用，例如许多人机界面应用。

1 Features

• I2C to GPIO expander

• Operating power-supply voltage range of 1.65 V to

5.5 V

• 5-V Tolerant I/O ports

• Software Reset via I2C General Call

• Software-enabled integrated pull-up resistors on P

ports

• P3 can be repurposed as INT output

• 1-MHz Fast mode plus I2C bus

• Input and output configuration register

• Polarity inversion register

• Internal power-on reset

• Power-up with all channels configured as inputs

• Noise filter on SCL and SDA inputs

• Latched outputs with high-current drive maximum

capability for directly driving LEDs

• ESD protection exceeds JESD 22

– 2000-V Human-body model (A114-A)

– 1000-V Charged-device model (C101)

2 Applications

• Personal electronics

– Wearables

– Mobile phones

– Gaming consoles

• Servers

• Routers

3 Description

The TCA9536 is a 4-bit I/O expander for the I2C bus

and is designed for 1.65-V to 5.5-V VCC operation.

It provides general-purpose remote I/O expansion for

most microcontroller families via the I2C interface.

The system controller can enable the I/Os as either

inputs or outputs by writing to the I/O configuration

register bits. The data for each input or output is

kept in the corresponding input or output register. The

polarity of the Input Port register can be inverted with

the Polarity Inversion register. There is an additional

special function register that can be used to disable

the internal pull-up resistors and P3 override to an INT

output.

The TCA9536 open-drain interrupt output (when

P3 is configured as INT in the special function

register) is activated when any input differs from its

corresponding Input Port register state and is used to

indicate to the system controller that an input state

has changed.

The system processor can reset the TCA9536 in the

event of a timeout or other improper operation by

using an I2C soft reset command, which puts the

registers in their default state.