TCA9535

SSOP (DB)

24

64 mm² 8.2 x 7.8

TSSOP (PW)

24

34 mm² 4.4 x 7.8

VQFN (RGE)

24

16 mm² 4 x 4

WQFN (RTW)

24

16 mm² 4 x 4

I²C to Parallel Port Expander
Wide Power Supply Voltage Range of 1.65 V to
5 V
Low Standby-Current Consumption
Open-Drain Active-Low Interrupt Output
5-V Tolerant I/O Ports
400-kHz Fast I²C Bus
Polarity Inversion Register
Address by Three Hardware Address Pins for Use of up to Eight Devices
Latched Outputs With High-Current Drive Capability for Directly Driving LEDs
Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
ESD Protection Exceeds JESD 22
- 2000-V Human-Body Model (A114-A)
- 1000-V Charged-Device Model (C101)

I²C to Parallel Port Expander
Wide Power Supply Voltage Range of 1.65 V to
5 V
Low Standby-Current Consumption
Open-Drain Active-Low Interrupt Output
5-V Tolerant I/O Ports
400-kHz Fast I²C Bus
Polarity Inversion Register
Address by Three Hardware Address Pins for Use of up to Eight Devices
Latched Outputs With High-Current Drive Capability for Directly Driving LEDs
Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
ESD Protection Exceeds JESD 22
- 2000-V Human-Body Model (A114-A)
- 1000-V Charged-Device Model (C101)

The TCA9535 is a 24-pin device that provides 16 bits of general purpose parallel input and output (I/O) expansion for the two-line bidirectional I²C bus or (SMBus) protocol. The device can operate with a power supply voltage ranging from 1.65 V to 5.5 V.

The TCA9535 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, the I/Os are configured as inputs. The system master can enable the I/Os as either inputs or outputs by writing to the I/O configuration bits.

The TCA9535 is identical to the TCA9555, except that the TCA9535 does not include the internal I/O pull-up resistor, which requires pull-ups and pull-downs on unused I/O pins when configured as an input and undriven.

The TCA9535 is a 24-pin device that provides 16 bits of general purpose parallel input and output (I/O) expansion for the two-line bidirectional I²C bus or (SMBus) protocol. The device can operate with a power supply voltage ranging from 1.65 V to 5.5 V.

The TCA9535 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, the I/Os are configured as inputs. The system master can enable the I/Os as either inputs or outputs by writing to the I/O configuration bits.

The TCA9535 is identical to the TCA9555, except that the TCA9535 does not include the internal I/O pull-up resistor, which requires pull-ups and pull-downs on unused I/O pins when configured as an input and undriven.

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Technical documentation

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	Type	Title	Date
*	Data sheet	TCA9535 Low-Voltage 16-Bit I2C and SMBus Low-Power I/O Expander with Interrupt Output and Configuration Registers datasheet (Rev. D)	01 Jul 2016
	Application note	I2C Dynamic Addressing	25 Apr 2019
	Application note	Choosing the Correct I2C Device for New Designs	07 Sep 2016
	Application note	Understanding the I2C Bus	30 Jun 2015
	Application note	Maximum Clock Frequency of I2C Bus Using Repeaters	15 May 2015
	Application note	I2C Bus Pull-Up Resistor Calculation	13 Feb 2015
	User guide	I/O Expander EVM User's Guide (Rev. A)	25 Jul 2014

Design & development

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Evaluation board

IO-EXPANDER-EVM — IO-EXPANDER-EVM: I2C and SMBus IO Expander Evaluation Module

The IO expander evaluation module (EVM) lets you evaluate TI's portfolio of SMBus and I2C IO expander line devices. The TCA6424A and TCA9539 come installed on the board. The 24-pin TSSOP footprint also supports TCA6408A, TCA6416A, TCA9534, TCA9534A, TCA9535, TCA9538, TCA9554, TCA9554A and TCA9555.

User guide

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Firmware

I/O Expander Software and Firmware Package (Rev. A)

SLVC564A.ZIP (2137 KB)

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Simulation model

TCA9535 IBIS Model

SCPM040.ZIP (87 KB) - IBIS Model

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Simulation tool

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PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)

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