PCA9515AD: I²C-bus repeater

The PCA9515A is a CMOS integrated circuit intended for application in I²C-bus and SMBus systems.

While retaining all the operating modes and features of the I²C-bus system, it permits extension of the I²C-bus by buffering both the data (SDA) and the clock (SCL) lines, thus enabling two buses of 400 pF.

The I²C-bus capacitance limit of 400 pF restricts the number of devices and bus length. Using the PCA9515A enables the system designer to isolate two halves of a bus, thus more devices or longer length can be accommodated. It can also be used to run two buses, one at 5 V and the other at 3.3 V or a 400 kHz and 100 kHz bus, where the 100 kHz bus is isolated when 400 kHz operation of the other is required.

Two or more PCA9515As cannot be put in series . The PCA9515A design does not allow this configuration. Since there is no direction pin, slightly different 'legal' low voltage levels are used to avoid lock-up conditions between the input and the output. A 'regular LOW' applied at the input of a PCA9515A will be propagated as a 'buffered LOW' with a slightly higher value. When this 'buffered LOW' is applied to another PCA9515A, PCA9516A or PCA9518/A in series, the second PCA9515A, PCA9516A or PCA9518/A will not recognize it as a 'regular LOW' and will not propagate it as a 'buffered LOW' again. The PCA9510/A, PCA9511/A, PCA9512/A, PCA9513/A, PCA9514/A cannot be used in series with the PCA9515A, PCA9516A or PCA9518/A, but can be used in series with themselves since they use shifting instead of static offsets to avoid lock-up conditions.

The output pull-down of each internal buffer is set for approximately 0.5 V, while the input threshold of each internal buffer is set about 0.07 V lower, when the output is internally driven LOW. This prevents a lock-up condition from occurring.

PCA9515AD: Product Block Diagram
sot096-1_3d
Data Sheets (1)
Name/DescriptionModified Date
I2C-bus repeater (REV 5.0) PDF (217.0 kB) PCA9515A23 Mar 2012
Application Notes (4)
Name/DescriptionModified Date
Single card I2C bus buffers (REV 1.0) PDF (238.0 kB) AN1041916 Nov 2010
Level shifting techniques in I2C-bus design (REV 1.0) PDF (52.0 kB) AN1044120 Jun 2007
PCA954X FAMILY OF I²C / SMBus MULTIPLEXERS and SWITCHES (REV 2.0) PDF (807.0 kB) AN26201 Oct 2004
I2C / SMBus Repeaters, Hubs and Expanders (REV 2.0) PDF (1.0 MB) AN25519 Dec 2002
Users Guides (4)
Name/DescriptionModified Date
I2C-bus specification and user manual (REV 6.0) PDF (1.4 MB) UM1020428 Apr 2014
I2C-bus specification and user manual (REV 5.0) PDF (1.6 MB) UM10204_JA03 Apr 2013
PCA9600 demonstration board OM6293 (REV 1.0) PDF (130.0 kB) UM1032315 Dec 2008
I2C Demonstration Board 2005-1 Quick Start Guide (REV 1.0) PDF (261.0 kB) UM1020613 Jun 2006
Brochures (4)
Name/DescriptionModified Date
NXP® I2C-bus solutions 2014: Smart, simple solutions for the 12 most common design concerns (REV 1.0) PDF (3.5 MB) 7501754001 Aug 2014
I2C/SMBus buffers for backplane multi-point and hot-swap applications; NXP® Level-shifting and... (REV 1.0) PDF (773.0 kB) 7501653001 Jul 2008
Evaluate the I2C-bus with a comprehensive kit; NXP® I2C 2002-1A evaluation board kits OM6285 and OM6278 (REV 1.0) PDF (1.8 MB) 7501653101 Jul 2008
Extend the I2C-bus with advanced repeaters and hubs; NXP® 2-channel I2C-bus repeaters PCA9515x and... (REV 1.0) PDF (740.0 kB) 7501653201 Jul 2008
Package Information (1)
Name/DescriptionModified Date
plastic small outline package; 8 leads; body width 3.9 mm (REV 1.0) PDF (244.0 kB) SOT96-108 Feb 2016
Packing (1)
Name/DescriptionModified Date
SO8; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or J Ordering... (REV 2.0) PDF (232.0 kB) SOT96-1_11819 Apr 2013
Supporting Information (3)
Name/DescriptionModified Date
Wave Soldering Profile (REV 1.0) PDF (20.0 kB) WAVE_SOLDERING_PROFILE30 Sep 2013
Footprint for reflow soldering (REV 1.0) PDF (9.0 kB) SO-SOJ-REFLOW08 Oct 2009
Footprint for wave soldering (REV 1.0) PDF (8.0 kB) SO-SOJ-WAVE08 Oct 2009
IBIS Model
Ordering Information
ProductStatusPackage versionApplicationEnableFunctionOperating Temperature (Cel)Number of bitsVoltage Translation Range (V)Operating voltage (VDC)Operating voltage 2 (V)InputsOutputsTTL Drive (mA)GTL Drive (mA)I2C-bus (kHz)
PCA9515ADActiveSOT96-1-40~852.3~3.6_tolerant_to_5.5 VDC11400
PCA9515AD/GNo Longer ManufacturedSOT96-1-40~852.3~3.6_tolerant_to_5.5 VDC11400
Package Information
Product IDPackage DescriptionOutline VersionReflow/Wave SolderingPackingProduct StatusPart NumberOrdering code(12NC)MarkingChemical ContentRoHS / Pb Free / RHFLeadFree Conversion DateEFRIFR(FIT)MTBF(hour)MSLMSL LF
PCA9515ADSOT96-1SO-SOJ-REFLOW SO-SOJ-WAVE
SO-SOJ-REFLOW SO-SOJ-WAVE
Reel 13" Q1/T1ActivePCA9515AD,118 (9352 767 66118)PA9515APCA9515ADweek 5, 20050.02.05E811
Bulk PackActivePCA9515AD,112 (9352 767 66112)PA9515APCA9515ADweek 5, 20050.02.05E811
I2C-bus repeater pca9515adp
Single card I2C bus buffers pca9518apw
Level shifting techniques in I2C-bus design pca9685pw
PCA954X FAMILY OF I²C / SMBus MULTIPLEXERS and SWITCHES pca9516apw
I2C / SMBus Repeaters, Hubs and Expanders pca9600
I2C-bus specification and user manual pca9685pw
I2C-bus specification and user manual pca9685pw
PCA9600 demonstration board OM6293 pca9600
I2C Demonstration Board 2005-1 Quick Start Guide pca9685pw
NXP® I2C-bus solutions 2014: Smart, simple solutions for the 12 most common design concerns pca9685pw
I2C/SMBus buffers for backplane multi-point and hot-swap applications; NXP® Level-shifting and... pca9518apw
Evaluate the I2C-bus with a comprehensive kit; NXP® I2C 2002-1A evaluation board kits OM6285 and OM6278 lm75a
Extend the I2C-bus with advanced repeaters and hubs; NXP® 2-channel I2C-bus repeaters PCA9515x and... pca9600
Reflow_Soldering_Profile Wave_Soldering_Profile LPC1112FD20
PCA9515 IBIS model PCA9515AD
plastic small outline package; 8 leads; body width 3.9 mm CBT3306_Q100
Footprint for reflow soldering NPIC6C596A_Q100
Footprint for wave soldering NPIC6C596A_Q100
SO8; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or J Ordering... CBT3306_Q100
PCA9515ADP
SA612A