The TCAL9539 device provides general purpose parallel input/output (I/O) expansion for the two-line bidirectional I2C bus (or SMBus) protocol and is designed for 1.08-V to 3.6-V VCC operation.
The device supports 100-kHz (Standard-mode), 400-kHz (Fast-mode), and 1-MHz (fast-mode-plus) I2C clock frequencies. I/O expanders such as the TCAL9539 provide a simple solution when additional I/Os are needed for switches, sensors, push-buttons, LEDs, fans, and so on.
The TCAL9539 has Agile I/O ports which include additional features designed to enhance the I/O performance in terms of speed, power consumption and EMI. The additional features are: programmable output drive strength, programmable pull-up and pull-down resistors, latchable inputs, maskable interrupt, interrupt status register, and programmable open-drain or push-pull outputs.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | TCAL9539 Low-Voltage 16-Bit I2C-Bus, SMBus I/O Expander with Interrupt Output, Reset, and Configuration Registers datasheet | PDF | HTML | 14 Jul 2022 |
| Application note | Features of TCAL Agile I/O Expanders | PDF | HTML | 06 Jun 2023 |
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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.
| Package | Pins | Download |
|---|---|---|
| TSSOP (PW) | 24 | View options |
| WQFN (RTW) | 24 | View options |
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
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