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PCA9615

NXP
Part Number PCA9615
Manufacturer NXP
Description Plus differential I2C-bus buffer
Published Jul 9, 2020
Detailed Description PCA9615 2-channel multipoint Fast-mode Plus differential I2C-bus buffer with hot-swap logic Rev. 2 — 16 September 202...
Datasheet PDF File PCA9615 PDF File

PCA9615
PCA9615

Overview
PCA9615 2-channel multipoint Fast-mode Plus differential I2C-bus buffer with hot-swap logic Rev.
2 — 16 September 2021 Product data sheet 1 General description The PCA9615 is a Fast-mode Plus (Fm+) SMBus/I2C-bus buffer that extends the normal single-ended SMBus/I2C-bus through electrically noisy environments using a differential SMBus/I2C-bus (dI2C) physical layer, which is transparent to the SMBus/I2C-bus protocol layer.
It consists of two single-ended to differential driver channels for the SCL (serial clock) and SDA (serial data).
The use of differential transmission lines between identical dI2C bus buffers removes electrical noise and common-mode offsets that are present when signal lines must pass between different voltage domains, are bundled with hostile signals, or run adjacent to electrical noise sources, such as high energy power supplies and electric motors.
The SMBus/I2C-bus was conceived as a simple slow speed digital link for short runs, typically on a single PCB or between adjacent PCBs with a common ground connection.
Applications that extend the bus length or run long cables require careful design to preserve noise margin and reject interference.
The dI2C-bus buffers were designed to solve these problems and are ideally suited for rugged high noise environments and/or longer cable applications, allow multiple targets, and operate at bus speeds up to 1 MHz clock rate.
Cables can be extended to at least 3 meters (3 m), or longer cable runs at lower clock speeds.
The dI2C-bus buffers are compatible with existing SMBus/I2C-bus devices and can drive Standard, Fast-mode, and Fast-mode Plus devices on the single-ended side.
Signal direction is automatic, and requires no external control.
To prevent bus latch up, the standard SMBus/I2C-bus side of the bus buffer, the PCA9615 employs static offset, care should be taken when connecting these to other SMBus/I2C-bus buffers that may not operate with offset.
This device is a bridge between the normal 2-wire...


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