The TCAL9538 device provides general purpose parallel input/output (I/O) expansion for the two-line bidirectional I2C bus (or SMBus) protocol and is designed for 1.08V to 3.6V VCC operation.
The device supports 100kHz (Standard-mode), 400kHz (Fast-mode), and 1MHz (fast-mode-plus) I2C clock frequencies. I/O expanders such as the TCAL9538 provide a simple solution when additional I/Os are needed for switches, sensors, push-buttons, LEDs, fans, and so on.
The TCAL9538 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.
| Top documentation | Type | Title | Format options | Date |
|---|---|---|---|---|
| * | Data sheet | TCAL9538 8 -Bit I2 C-Bus, SMBus I/O Expander With Interrupt Output, Reset, and Agile I/O Configuration Registers datasheet (Rev. B) | PDF | HTML | May 7, 2025 |
| Application note | Understanding Transient Drive Strength vs. DC Drive Strength in Level-Shifters (Rev. A) | PDF | HTML | Jul 3, 2024 | |
| Application note | Features of TCAL Agile I/O Expanders | PDF | HTML | Jun 6, 2023 |
For additional terms or required resources, click any title below to view the detail page where available.
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.
The TSG06D00EVM is a dual-channel 6GHz RF signal generator evaluation module from Texas Instruments designed for engineers who need a compact, USB-controlled RF source for lab bench use, system evaluation, and automated test applications. The device provides two semiindependent, coherent RF output (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| UQFN (RSV) | 16 | Ultra Librarian |
| TSSOP (PW) | 16 | Ultra Librarian |
| X2QFN (DTU) | 16 | Ultra Librarian |
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
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