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PCA9512A

Selection guide

Datasheet

PCA9512A
(Product Specification)
19-Aug-09, 23 pages, 145 kB

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PCA9512A - Level shifting hot swappable I2C-bus and SMBus bus buffer

General description
Features
Products/packages
Quality/reliability/chemical content
Pricing/ordering/availability
Samples
Discontinued information
Applications
Block diagrams/pinning
Design support
Parametrics/similar products
Print/email
Disclaimers
All information hereunder is subject to the subsequent disclaimers

General description

The PCA9512A is a hot swappable I2C-bus 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 PCA9512A provides bidirectional buffering, keeping the backplane and card capacitances isolated.

The PCA9512A rise time accelerator circuitry allows the use of weaker DC pull-up currents while still meeting rise time requirements. The PCA9512A incorporates a digital input pin that enables and disables the rise time accelerators on all four SDAn and SCLn pins.

During insertion, the PCA9512A SDAn and SCLn pins are precharged to 1 V to minimize the current required to charge the parasitic capacitance of the chip.

The dynamic offset design of the PCA9510A/11A/12A/13A/14A I/O drivers allow them to be connected to another PCA9510A/11A/12A/13A/14A device in series or in parallel and to the A side of the PCA9517. The PCA9510A/11A/12A/13A/14A cannot connect to the static offset I/Os used on the PCA9515/15A/16/16A/18, PCA9517 B side, or P82B96 Sx/y side.

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Features

  • Bidirectional buffer for SDA and SCL lines increases fan-out and prevents SDA and SCL corruption during live board insertion and removal from multipoint backplane systems
  • Compatible with I2C-bus Standard mode, I2C-bus Fast mode, and SMBus standards
  • Built-in ΔV/Δt rise time accelerators on all SDA and SCL lines (0.6 V threshold) with ability to disable ΔV/Δt rise time accelerator through the ACC pin for lightly loaded systems, requires the bus pull-up voltage and respective supply voltage (VCC or VCC2) to be the same
  • 5 V to 3.3 V level translation with optimum noise margin
  • High-impedance SDAn and SCLn pins for VCC or VCC2 = 0 V
  • 1 V precharge on all SDAn and SCLn pins
  • Supports clock stretching and multiple master arbitration and synchronization
  • Operating power supply voltage range: 2.7 V to 5.5 V
  • 0 Hz 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 JEDEC Standard JESD78 which exceeds 100 mA
  • Packages offered: SO8, TSSOP8 (MSOP8)

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Products/packages

Type numberOrderable part numberOrdering code (12NC)Product statusPackagePackingMarkingECCN
PCA9512ADPCA9512AD,1129352 797 21112Volume productionSOT96TubeStandard Marking
PCA9512ADPCA9512AD,1189352 797 21118Volume productionSOT96Reel Pack, SMD, 13"Standard Marking
PCA9512ADPPCA9512ADP,1189352 797 19118Volume productionSOT505Reel Pack, SMD, 13"Standard Marking

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Quality/reliability/chemical content

Type numberOrderable part numberChemical contentRoHSLeadfree Conversion dateRHFIRF (FIT)MTBF (hours)MSL
PCA9512ADPCA9512AD,112PCA9512AD
Always Pb-free
PCA9512ADPCA9512AD,118PCA9512AD
Always Pb-free
PCA9512ADPPCA9512ADP,118PCA9512ADP
Always Pb-free

Quality and reliability disclaimer

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Pricing/ordering/availability

Type numberOrdering code(12NC)Orderable part numberIndicative price/unit($)RegionDistributorIn stockOrder quantityInventory dateBuy onlineSamples
PCA9512AD9352 797 21112  PCA9512AD,112  1.3000NAMOUSER ELECTRONICS2,659 11/20/2009Buy onlinenot available
    NADIGI-KEY CORPORATION1,787 11/20/2009Buy online 
    NAMOUSER ELECTRONICS2,659 11/20/2009Buy online 
    NAFUTURE ELECTRONICS50 11/19/2009Buy online 
    NAAVNET ELECTRONICS MARKETING3,226 11/19/2009Buy online 
PCA9512AD9352 797 21118  PCA9512AD,118  1.3000NAMOUSER ELECTRONICS2,387 11/20/2009Buy onlinenot available
    NAAVNET ELECTRONICS MARKETING1,113 11/19/2009Buy online 
    NAMOUSER ELECTRONICS2,387 11/20/2009Buy online 
    NAFUTURE ELECTRONICS5,000 11/19/2009Buy online 
    NAARROW ELECTRONICS2,500 11/19/2009Buy online 
PCA9512ADP9352 797 19118  PCA9512ADP,118  1.3000NAMOUSER ELECTRONICS2,500 11/20/2009Buy onlineOrder samples
    NADIGI-KEY CORPORATION4,057 11/20/2009Buy online 
    NAMOUSER ELECTRONICS2,500 11/20/2009Buy online 
    NAFUTURE ELECTRONICS10,000 11/19/2009Buy online 
    ASIASAC - Taiwanyes250011/20/2009Buy online 
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Applications

  • cPCI, VME, AdvancedTCA cards and other multipoint 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

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Block diagrams/pinning

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Parametrics/similar products

Type numberPackageOperating
temp.(Cel)		I²C-bus(kHz)Operating voltage(VDC)Operating Voltage Range 2(V)InputsOutputs
PCA9512ADSOT96
-40~854002.7~5.52.7~5.511
PCA9512ADPSOT505
-40~854002.7~5.52.7~5.511


Similar products
PCA9512A 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.

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