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PCA9510

NXP
Part Number PCA9510
Manufacturer NXP
Description Hot swappable I2C and SMBus bus buffer
Published Mar 22, 2005
Detailed Description INTEGRATED CIRCUITS PCA9510; PCA9511 Hot swappable I2C and SMBus bus buffer Product data sheet Supersedes data of 2003 ...
Datasheet PDF File PCA9510 PDF File

PCA9510
PCA9510

Overview
INTEGRATED CIRCUITS PCA9510; PCA9511 Hot swappable I2C and SMBus bus buffer Product data sheet Supersedes data of 2003 Dec 18 2004 Oct 05 Philips Semiconductors Philips Semiconductors Product data sheet Hot swappable I2C and SMBus bus buffer PCA9510; PCA9511 DESCRIPTION The PCA9510 and PCA9511 are hot swappable I2C and SMBus buffers that allows I/O card insertion into a live backplane without corrupting the data and clock buses.
Control circuitry prevents the backplane from being connected to the card until a stop command or bus idle occurs on the backplane without bus contention on the card.
When the connection is made, the PCA9510 and PCA9511 provides bi-directional buffering, keeping the backplane and card capacitances isolated.
The PCA9511 rise time accelerator circuitry allows the use of weaker DC pull-up currents while still meeting rise time requirements, while the PCA9510 has no rise time accelerator circuitry to prevent interference when there are multiple devices in the same system.
The PCA9510 and PCA9511 incorporate a digital ENABLE input pin, which enables the device when asserted HIGH and forces the device into a low current mode when asserted LOW, and an open-drain READY output pin, which indicates that the backplane and card sides are connected together (HIGH) or not (LOW).
During insertion, the PCA9510 (IN only) and PCA9511 SDA and SCL lines are precharged to 1 V to minimize the current required to charge the parasitic capacitance of the chip.
The dynamic offset design of the PCA9510/11/12/13/14 I/O drivers allow them to be connected to another PCA9510/11/12/13/14 device in series or in parallel and to the A side of the PCA9517.
The PCA9510/11/12/13/14 can not connect to the static offset I/Os used on the PCA9515/15A/16/16A/17 B side and PCA9518.
FEATURES • Bi-directional buffer for SDA and SCL lines increases fanout and prevents SDA and SCL corruption during live board insertion and removal from multi-point backplane systems • Compatible ...


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