16-bit 1.65- to 5.5-V I2C/SMBus I/O expander with interrupt & config registers
Product details
Parameters
Package | Pins | Size
Features
- 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)
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Description
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.
Technical documentation
= Top documentation for this product selected by TI
| Type | Title | Date | |
|---|---|---|---|
| * | Datasheet | TCA9535 Low-Voltage 16-Bit I2C and SMBus Low-Power I/O Expander with Interrupt Output and Configuration Registers datasheet (Rev. D) | Jul. 01, 2016 |
| Application note | I2C Dynamic Addressing | Apr. 25, 2019 | |
| Application note | Choosing the Correct I2C Device for New Designs | Sep. 07, 2016 | |
| Application note | Understanding the I2C Bus | Jun. 30, 2015 | |
| Application note | Maximum Clock Frequency of I2C Bus Using Repeaters | May 15, 2015 | |
| Application note | I2C Bus Pull-Up Resistor Calculation | Feb. 13, 2015 | |
| User guide | I/O Expander EVM User's Guide (Rev. A) | Jul. 25, 2014 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
IO-EXPANDER-EVM
Description
Features
- IO expander evaluation through LEDs or broken out to headers
- Input evaluation with on board pushbutton switches
- Example code including necessary functions for each IO expander
Software development
SLVC564A.ZIP (2137 KB)
Design tools & simulation
SCPM040.ZIP (87 KB) - IBIS Model
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Features
- GUI-based web application
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Reference designs
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Design files
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TIDA-01579 — The point-of-load power-tree on video surveillance systems is optimized with this reference design. This reference design has a high performance on key parameters such as output voltage accuracy, voltage ripple, and thermal dissipation. This high performance is possible with a small board area and (...)
Design files
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download TIDA-01579 BOM.pdf (81KB) -
download TIDA-01579 Assembly Drawing.pdf (394KB) -
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Design files
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TIDA-00168 — The sole objective of this reference design is to provide comprehensive details on how to design a simple, robust, and accurate analog front end (AFE) circuit for making precision temperature measurements with thermocouple sensors. TIDA-00168 explains the theory, operation, and complications (...)
Design files
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TIDA-00468 — The TIDA-00468 Reference design shows how to build an isolated thermocouple sensing front-end with optimized power-consumption for loop powered application while:
• reducing footprint from classical look-up table approach and
• keeping the fast response time of linear piece wise interpolation
• reducing footprint from classical look-up table approach and
• keeping the fast response time of linear piece wise interpolation
Design files
CAD/CAE symbols
| Package | Pins | Download |
|---|---|---|
| SSOP (DB) | 24 | View options |
| TSSOP (PW) | 24 | View options |
| VQFN (RGE) | 24 | View options |
| WQFN (RTW) | 24 | View options |
Ordering & quality
Information included:
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
Support & training
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