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PCA9525

NXP Semiconductors
Part Number PCA9525
Manufacturer NXP Semiconductors
Description Simple 2-wire bus buffer
Published Mar 10, 2011
Detailed Description PCA9525 Simple 2-wire bus buffer Rev. 1 — 25 February 2011 Product data sheet 1. General description The PCA9525 is a m...
Datasheet PDF File PCA9525 PDF File

PCA9525
PCA9525

Overview
PCA9525 Simple 2-wire bus buffer Rev.
1 — 25 February 2011 Product data sheet 1.
General description The PCA9525 is a monolithic CMOS integrated circuit for bus buffering in applications including I2C-bus, SMBus, DDC, PMBus, and other systems based on similar principles.
The buffer extends the bus load limit by buffering both the SCL and SDA lines, allowing the maximum permissible bus capacitance on both sides of the buffer.
The PCA9525 includes a unidirectional buffer for the clock signal, and a bidirectional buffer for the data signal.
Slave devices which employ clock stretching are therefore not supported.
In its most basic implementation, the buffer will allow an extended number of slave devices to be attached to one (or more) master devices.
In this case, all master devices would be positioned on the Sxx_IN side of the PCA9525.
The direction pin (DIR) further enhances this function by allowing the unidirectional clock signal to be reversed, thus allowing master devices on both si...


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