TCA9536 Series
Remote 4-Bit I²C and SMBus I/O expander with configuration register and interrupt
Manufacturer: Texas Instruments
Catalog
Remote 4-Bit I²C and SMBus I/O expander with configuration register and interrupt
Key Features
• I2C to GPIO expanderOperating power-supply voltage range of 1.65 V to 5.5 V5-V Tolerant I/O portsSoftware Reset via I2C General CallSoftware-enabled integrated pull-up resistors on P portsP3 can be repurposed asINToutput1-MHz Fast mode plus I2C busInput and output configuration registerPolarity inversion registerInternal power-on resetPower-up with all channels configured as inputsNoise filter on SCL and SDA inputsLatched outputs with high-current drive maximum capability for directly driving LEDsESD protection exceeds JESD 222000-V Human-body model (A114-A)1000-V Charged-device model (C101)I2C to GPIO expanderOperating power-supply voltage range of 1.65 V to 5.5 V5-V Tolerant I/O portsSoftware Reset via I2C General CallSoftware-enabled integrated pull-up resistors on P portsP3 can be repurposed asINToutput1-MHz Fast mode plus I2C busInput and output configuration registerPolarity inversion registerInternal power-on resetPower-up with all channels configured as inputsNoise filter on SCL and SDA inputsLatched outputs with high-current drive maximum capability for directly driving LEDsESD protection exceeds JESD 222000-V Human-body model (A114-A)1000-V Charged-device model (C101)
Description
AI
The TCA9536 is a 4-bit I/O expander for the I2C bus and is designed for 1.65-V to 5.5-V VCCoperation. 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 anINToutput.
The TCA9536 open-drain interrupt output ( when P3 is configured asINTin 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.
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The TCA9536 is a 4-bit I/O expander for the I2C bus and is designed for 1.65-V to 5.5-V VCCoperation. 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 anINToutput.
The TCA9536 open-drain interrupt output ( when P3 is configured asINTin 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.
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