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PCA9507

NXP Semiconductors
Part Number PCA9507
Manufacturer NXP Semiconductors
Description 2-wire serial bus extender
Published May 14, 2010
Detailed Description PCA9507 2-wire serial bus extender for HDMI DDC I2C-bus and SMBus Rev. 01 — 7 February 2008 Product data sheet 1. Gener...
Datasheet PDF File PCA9507 PDF File

PCA9507
PCA9507

Overview
PCA9507 2-wire serial bus extender for HDMI DDC I2C-bus and SMBus Rev.
01 — 7 February 2008 Product data sheet 1.
General description The PCA9507 is a 2-wire serial bus extender providing 3.
3 V to 5 V level shift that allows up to 18 meters bus extension for reliable DDC, I2C-bus or SMBus applications.
While retaining all the operating modes and features of the I2C-bus system during the level shifts, it also permits extension of the I2C-bus by providing bidirectional buffering for both the data (SDA) and the clock (SCL) line as well as the rise time accelerator on port A enabling the bus to drive a load up to 1400 pF or distance of 18 m on port A, and 400 pF on port B.
Using the PCA9507 enables the system designer to isolate bus capacitance to meet HDMI DDC version 1.
3 distance specification.
The SDA and SCL pins are overvoltage tolerant and are high-impedance when the PCA9507 is unpowered.
The port B drivers with static level offset behave much like the drivers on the PCA9515 device, while the port A drivers integrate the rise time accelerator, sink more current and eliminate the static offset voltage.
This results in a LOW on port B translating into a nearly 0 V LOW on port A.
The static level offset design of the port B I/O drivers prevent them from being connected to another device that has rise time accelerator including the PCA9510, PCA9511, PCA9512, PCA9513, PCA9514, PCA9515, PCA9516A, PCA9517 (B-side), or PCA9518.
The port A sides of two or more PCA9507s can be connected together, however, to allow a star topography with port A on the common bus, and port A can be connected directly to any other buffer with static or dynamic offset voltage.
Multiple PCA9507s can be connected in series, port A to port B, with no build-up in offset voltage with only time of flight delays to consider.
Rise time accelerator on port A is turned on when input threshold is above 0.
3VCC(A).
The PCA9507 drivers are not enabled unless VCC(A) and VCC(B) are above 2.
7 V.
The EN pin can a...


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