TCA6424 Overview
This 24-bit I/O expander for the two-line bidirectional bus (I2C) is designed to provide general-purpose remote I/O expansion for most microcontroller families via the I2C interface [serial clock (SCL) and serial data (SDA)]. The major benefit of this device is its wide VCC range. It can operate from 1.65 V to 5.5 V on the P-port side and on the SDA/SCL side.
TCA6424 Key Features
- 1 Operating Power-Supply Voltage Range of 1.65 V to 5.5 V
- Allows Bidirectional Voltage-Level Translation and GPIO Expansion Between
- 1.8-V SCL/SDA and 1.8-V, 2.5-V, 3.3-V, or 5-V P Port
- 2.5-V SCL/SDA and 1.8-V, 2.5-V, 3.3-V, or 5-V P Port
- 3.3-V SCL/SDA and 1.8-V, 2.5-V, 3.3-V, or 5-V P Port
- 5-V SCL/SDA and 1.8-V, 2.5-V, 3.3-V, or 5-V P Port
- I2C to Parallel Port Expander
- Low Standby Current Consumption of 1 μA
- Schmitt-Trigger Action Allows Slow Input
- Vhys = 0.18 V Typ at 1.8 V