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TCA9535

ACTIVE

16-bit 1.65- to 5.5-V I2C/SMBus I/O expander with interrupt & config registers

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Data sheet

TCA9535

ACTIVE
Data sheet Order now

Product details

Number of I/Os 16 Features Configuration registers, Interrupt pin Supply voltage (Min) (V) 1.65 Supply voltage (Max) (V) 5.5 Addresses 8 Rating Catalog Frequency (Max) (kHz) 400 Operating temperature range (C) -40 to 85
Number of I/Os 16 Features Configuration registers, Interrupt pin Supply voltage (Min) (V) 1.65 Supply voltage (Max) (V) 5.5 Addresses 8 Rating Catalog Frequency (Max) (kHz) 400 Operating temperature range (C) -40 to 85
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 4.0 x 4.0
  • 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 controller 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 controller 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. E) PDF | HTML 06 May 2022
Application note I2C Dynamic Addressing 25 Apr 2019
Application note Choosing the Correct I2C Device for New Designs PDF | HTML 07 Sep 2016
Application note Understanding the I2C Bus PDF | HTML 30 Jun 2015
Application note Maximum Clock Frequency of I2C Bus Using Repeaters 15 May 2015
Application note I2C Bus Pull-Up Resistor Calculation PDF | HTML 13 Feb 2015
EVM User's guide I/O Expander EVM User's Guide (Rev. A) 25 Jul 2014

Design & development

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

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: PDF
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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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Design tool

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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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TINA-TI — SPICE-based analog simulation program

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Package Pins Download
SSOP (DB) 24 View options
TSSOP (PW) 24 View options
VQFN (RGE) 24 View options
WQFN (RTW) 24 View options

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