PCA9512

General description

The PCA9512 is a hot swappable I²C and SMBus buffer that allows I/O card insertion into a live backplane without corruption of the data and clock buses and includes two dedicated supply voltage pins to provide level shifting between 3.3 V and 5 V systems while maintaining the best noise margin for each voltage level. Either pin may be powered with supply voltages ranging from 2.7 V to 5.5 V with no constraints on which supply voltage is higher. Control circuitry prevents the backplane from being connected to the card until a stop bit or bus idle occurs on the backplane without bus contention on the card. When the connection is made, the PCA9512 provides bi-directional buffering, keeping the backplane and card capacitances isolated.

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 with I²C standard mode, I²C fast mode, and SMBus standards
• ΔV/Δt rise time accelerators on all SDA and SCL lines with ability to disable ΔV/Δt rise time accelerators through the ACC pin for lightly loaded systems
• 5 V to 3.3 V level translation with optimum noise margin
• High-impedance SDA, SCL pins for V_CC or V_CC2 = 0 V
• 1 V precharge on all SDA and SCL lines
• Supports clock stretching and multiple master arbitration/synchronization
• Operating power supply voltage range: 2.7 V to 5.5 V
• 5.5 V tolerant I/Os
• 0 kHz to 400 kHz clock frequency
• ESD protection exceeds 2000 V HBM per JESD22-A114, 200 V MM per JESD22-A115 and 1000 V CDM per JESD22-C101
• Latch-up testing is done to JESDEC Standard JESD78 which exceeds 100 mA
• Packages offered: SO8, TSSOP8 (MSOP8)

Products/packages

All type numbers in the table below are discontinued. See the table Discontinued information for more information.

Quality/reliability/chemical content

All type numbers in the table below are discontinued. See the table Discontinued information for more information.

Quality and reliability disclaimer

Discontinued information

Applications

• cPCI, VME, AdvancedTCA cards and other multi-point backplane cards that are required to be inserted or removed from an operating system.

Related applications
Intelligent washing machine
Transceiver board
Power amplifier board
Main CPU board
LCD TV - MMS functionality

Block diagrams/pinning

Design support

Application Notes

AN255; I2C / SMBus Repeaters, Hubs and Expanders (2002-12-19)

AN10441; Level shifting techniques in I2C-bus design (2007-06-20)

AN262; PCA954X FAMILY OF I²C / SMBus MULTIPLEXERS and SWITCHES (2004-10-01)

Support Documents

UM10206; I2C Demonstration Board 2005-1 Quick Start Guide (2006-06-13)

UM10204; I2C-bus specification and user manual (2007-06-26)

web; IBIS and HSPICE Model ()

UM10323; PCA9600 demonstration board OM6293 (2008-12-15)

Parametrics/similar products

Similar products
PCA9512 links to the similar products page containing an overview of products that are similar in function or related to the type number(s) as listed on this page. The similar products page includes products from the same catalog tree(s), relevant selection guides and products from the same functional category.

Print / Email

• Print this information
• Email this information

Disclaimers

• General product disclaimer
• Quality and reliability disclaimer