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The 2-Wire Bus Buffers The port (SDA IN, SDA OUT) that falls below the ‘lock voltage’ Vlock first will control the buffer direction and ‘lock out’ signals coming from the opposite side.
As the ‘input’ signal falls more, it will drive the ‘output’ side LOW. To reduce the impacts of noise, hysteresis is applied to the buffer once more.
The data flow will reverse at some points throughout the transmission, such as when the slave transmits an acknowledge (ACK) or responds with its register contents.
During these moments, the controlling ‘input’ side must increase above the ‘unlock voltage’ (V unlock) before releasing the ‘lock,’ allowing the ‘output’ side to acquire control and draw (what was) the lock.
The Global 2-Wire Bus Buffers market accounted for $XX Billion in 2023 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2024 to 2030.
The NXP semiconductors PCA9605 2-Wire Bus Buffers is a monolithic CMOS integrated circuit designed for bus buffering in systems like as I2C-bus, SMBus, DDC, PMBus, and others.
By buffering both the SCL and SDA lines, the buffer enhances the bus load limit by permitting the maximum permitted bus capacitance on both sides of the buffer.
The PCA9605 2-Wire Bus Buffers has a unidirectional clock signal buffer and a bidirectional data signal buffer. Follower devices that use clock stretching are thus not supported.
In its most basic form, the buffer allows an unlimited number of follower devices to be connected to one (or more) leader device.
In this example, all leader devices would be placed on the PCA9605’s Sxx IN side. The direction pin (DIR) enhances this capability even further by allowing the unidirectional clock signal to be reversed, allowing leader devices on both sides of the buffer.
The enable (EN) function allows you to isolate areas of the bus. Individual components of the system can be brought online one at a time. This allows for a regulated start-up with a wide range of components, operating speeds, and loads.