The RTS5423 is an advanced USB3.2 Gen2x1 Hub and PD3.0 controller supporting up to two ports full featured Type-C, and 3 ports Type-A connectors that function as a 4-Port USB3.2 Gen2x1 Hub, a 4-Port USB2.0 Hub, and a 2-Port PD3.0 controller. It supports USB3.2 Gen2x1, USB2.0, Type-C, and PD3.0 specifications, and fully backward supports the USB3.2 Gen1, USB1.1, and USB1.0 specifications. Based on MCU architecture, the RTS5423 can easily update FW for future specification updates, or provide easy feature customization, using an ISP tool.
With an RT smart charger function, the RTS5423 supports most popular charging solutions and supports BC1.2 and PD3.0. It also implements CC terminations defined by Type-C specification Revision1.2 for current advertisements. Additionally, Apple and Samsung charger ports are emulated on every port with the RTS5423’s Auto-Detection-Switch mechanism.
The ‘ACA-Docking’ function defined by the BC1.2 specification is also supported by the RTS5420’s upstream port. When a device that supports the ACA-Dock feature of the BC1.2 specification is connected to an ACA-Dock, it acts as a host to various USB peripherals, such as a hub, keyboard, mouse, printer, etc., while simultaneously this device can be receiving a charge.
The BOM cost is reduced through a combination of factors. The RTS5423 deploys 10Gbps 1:2 MUX on the upstream port and downstream port 1, which is necessary for Type-C’s plug flip-ability. An LDO regulator is integrated, supplying stable 3.3V for the RTS5423. In DP-Alt mode, a HPD pin is used for DP plug detection. With a high resolution ADC of up to 4 channels, the RTS5423 can monitor the current and voltage of each port simultaneously for OCP, UVP, and OVP protection. There is also a configurable Billboard device integrated, which is important when Alt-Mode is applied.
The RTS5423 has various interfaces such as GPIOs, I2C, and SMBUS, for controlling or communicating with other components, such as a PMU (Power Management Unit) for Type-C VBUS management.
The RTS5423 supports a special power saving function named ‘Delink mode’. When no device is attached, the RTS5420 can switch to a deeper suspend mode similar to ‘Disconnected’.
The RTS5423 KGH is a module that includes the RTS5423 controller. It offers 4 downstream port Type-A connectors, and supports USB3.2 Gen2x1 Multiple-IN transfers. This module supports USB3.2 Gen2, USB2.0, and fully backward supports the USB3.2 Gen1 (USB3.0), USB1.1, and USB1.0 specifications.
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