Model No: TCA9535PWR
Texas Instruments TCA9535PWR
Manufacturer: Texas Instruments
SEMICON NO.: TCA9535PWR
Package: 24-TSSOP
Stock: In stock
Description: I/O Expander 16-bit I²C and SMBus
SEMICON NO.: TCA9535PWR
Package: 24-TSSOP
Stock: In stock
Description: I/O Expander 16-bit I²C and SMBus
Quantity :
| Mfr | Texas Instruments |
| Device Type | 16-bit I²C and SMBus I/O Expander |
| Number of I/O Channels | 16 (two 8-bit ports) |
| Interface Type | I²C, SMBus (two-line bidirectional) |
| Max Bus Frequency | 400 kHz (Fast mode) |
| Output Type | Push-Pull |
| Interrupt Output | Yes |
| Supply Voltage (VCC) | 1.65 V to 5.5 V |
| Standby Current (IQ) | 1.5 µA (typical) |
| Operating Temperature | -40°C to +85°C |
| Package | 24-TSSOP |
| Mounting Type | Surface Mount |
| Compliance | RoHS Compliant |
TCA9535PWR 16-bit I2C and SMBus I/O expander
TheTCA9535PWR, designed by Texas Instruments, is a 16-bit I2C and SMBus-compatible low-voltage I/O expander that provides a simple and versatile solution for expanding the number of general-purpose input/output (GPIO) ports when a system master microcontroller or processor runs out of available pins. This device communicates via a standard two-wire I2C interface, converting serial data into 16 parallel I/O lines that can be independently configured, significantly alleviating pin bottlenecks on the main processor. Supporting a wide power supply voltage range from 1.65V to 5.5V, it allows seamless interfacing between low-voltage modern processors and higher-voltage legacy peripheral devices without requiring complex external level-shifting circuitry, making it an essential component for simplifying bus architectures and reducing wiring complexity in modern embedded systems.
Technically, the TCA9535PWR boasts exceptional configuration flexibility, where each of the 16 port pins can be independently set as either an input or an output via the direction register, while its open-drain active-low interrupt output (INT) pin is triggered on any input state change, alerting the master processor and eliminating the need for continuous I2C bus polling. The device features three hardware address pins (A0, A1, A2), which allow up to eight TCA9535 devices to be connected simultaneously on the exact same I2C bus, theoretically providing up to 128 additional GPIO pins for massive system expansion. Additionally, it supports fast-mode I2C bus speeds of up to 400 kHz, integrates a power-on reset function to ensure all internal registers initialize to a safe default state, and features a very low standby current consumption, optimizing energy efficiency for battery-powered, portable, and always-on electronic applications.
Alternative GPIO Expander Models
● NXP PCF8575: A widely used 16-bit I2C remote I/O expander that features quasi-bidirectional ports and high current drive capability, offering a straightforward solution for directly driving LEDs and logic gates in general-purpose interface expansion.
● Microchip MCP23017: A highly popular 16-bit SPI/I2C GPIO expander equipped with configurable interrupt outputs, input polarity inversion, and cascading capabilities, renowned for its advanced configuration registers and high design flexibility.
● Maxim Integrated MAX7311: A robust 16-bit I2C port expander featuring internal pull-up resistors, hot-swap capability, and fast I2C communication, specifically engineered for complex and highly reliable multi-point data acquisition networks.
TheTCA9535PWR, designed by Texas Instruments, is a 16-bit I2C and SMBus-compatible low-voltage I/O expander that provides a simple and versatile solution for expanding the number of general-purpose input/output (GPIO) ports when a system master microcontroller or processor runs out of available pins. This device communicates via a standard two-wire I2C interface, converting serial data into 16 parallel I/O lines that can be independently configured, significantly alleviating pin bottlenecks on the main processor. Supporting a wide power supply voltage range from 1.65V to 5.5V, it allows seamless interfacing between low-voltage modern processors and higher-voltage legacy peripheral devices without requiring complex external level-shifting circuitry, making it an essential component for simplifying bus architectures and reducing wiring complexity in modern embedded systems.
Technically, the TCA9535PWR boasts exceptional configuration flexibility, where each of the 16 port pins can be independently set as either an input or an output via the direction register, while its open-drain active-low interrupt output (INT) pin is triggered on any input state change, alerting the master processor and eliminating the need for continuous I2C bus polling. The device features three hardware address pins (A0, A1, A2), which allow up to eight TCA9535 devices to be connected simultaneously on the exact same I2C bus, theoretically providing up to 128 additional GPIO pins for massive system expansion. Additionally, it supports fast-mode I2C bus speeds of up to 400 kHz, integrates a power-on reset function to ensure all internal registers initialize to a safe default state, and features a very low standby current consumption, optimizing energy efficiency for battery-powered, portable, and always-on electronic applications.
Alternative GPIO Expander Models
● NXP PCF8575: A widely used 16-bit I2C remote I/O expander that features quasi-bidirectional ports and high current drive capability, offering a straightforward solution for directly driving LEDs and logic gates in general-purpose interface expansion.
● Microchip MCP23017: A highly popular 16-bit SPI/I2C GPIO expander equipped with configurable interrupt outputs, input polarity inversion, and cascading capabilities, renowned for its advanced configuration registers and high design flexibility.
● Maxim Integrated MAX7311: A robust 16-bit I2C port expander featuring internal pull-up resistors, hot-swap capability, and fast I2C communication, specifically engineered for complex and highly reliable multi-point data acquisition networks.
