PCA9527DP: 3-channel bidirectional bus extender for HDMI, I2C-bus and SMBus

The PCA9527 is a 3-channel bidirectional open-drain bus buffer for Display Data Control (DDC) clock, data and Consumer Electronic Control (CEC) for HDMI application. The device has two power supply pins to allow voltage level shift from 2.7 V to 5 V, and a rise time accelerator on port A of each DDC clock and data for driving longer cable (up to 18 meters or 1400 pF reliably without violating the bus rise time). The 5 V tolerant CEC channel is internally connected to VCC(B) and has no rise time accelerator. The CEC channel can be used as an interrupt or reset.

While retaining all the operating modes and features of the I²C-bus system during the level shift, it also permits extension of the I²C-bus by providing bidirectional buffering for data (SDA), clock (SCL), and CEC. Using the PCA9527 enables the system designer to isolate bus capacitance to meet HDMI DDC version 1.3 distance specification. The SDAx and SCLx pins are overvoltage tolerant and are high-impedance when the PCA9527 is unpowered. The port B drivers (SDAB, SCLB, CECB) with static level offset behave much like the drivers on the PCA9515 device, while the SDAA and SCLA drivers integrate the rise time accelerator, sink more current and eliminate the static offset voltage. The CECA driver has the same current and static offset voltage features as the SDAA and SCLA, but it does not have the rise time accelerator and is powered and referenced to VCC(B). This results in a LOW on the port B translating into a nearly 0 V LOW on port A, providing zero offset. 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 PCA9507 (port B), PCA9510, PCA9511, PCA9512, PCA9513, PCA9514, PCA9515, PCA9516A, PCA9517 (port B), or PCA9518A. Port A of two or more PCA9527s 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 PCA9527s 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 accelerators on the SDAA and SCLA pins are turned on when input threshold is above 0.3VCC(A). The PCA9527 SDA and SCL drivers are not enabled unless VCC(A) and VCC(B) are above 2.7 V. The EN pin can also be used to turn the drivers on and off under system control. Caution should be observed to only change the state of the enable pin when the bus is idle. The output pull-down on the port B internal buffer LOW is set for approximately 0.5 V, while the input threshold of the internal buffer is set about 70 mV lower (0.43 V). When the port B I/O is driven LOW internally, the LOW is not recognized as a LOW by the input. This prevents a lock-up condition from occurring.

PCA9527DP: Product Block Diagram
sot552-1_3d
Data Sheets (1)
Name/DescriptionModified Date
3-channel bidirectional bus extender for HDMI, I2C-bus and SMBus (REV 1.0) PDF (138.0 kB) PCA952729 Jun 2009
Application Notes (2)
Name/DescriptionModified Date
Level shifting techniques in I2C-bus design (REV 1.0) PDF (52.0 kB) AN1044120 Jun 2007
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 (1)
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
Package Information (1)
Name/DescriptionModified Date
plastic thin shri small outline package; 10 leads; body width 3 mm (REV 1.1) PDF (256.0 kB) SOT552-107 Jun 2016
Packing (1)
Name/DescriptionModified Date
TSSOP10; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or... (REV 1.0) PDF (269.0 kB) SOT552-1_11816 Apr 2013
Supporting Information (3)
Name/DescriptionModified Date
Reflow Soldering Profile (REV 1.0) PDF (34.0 kB) REFLOW_SOLDERING_PROFILE30 Sep 2013
Wave Soldering Profile (REV 1.0) PDF (20.0 kB) WAVE_SOLDERING_PROFILE30 Sep 2013
Footprint for wave soldering (REV 1.0) PDF (16.0 kB) SSOP-TSSOP-VSO-WAVE08 Oct 2009
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)
PCA9527DPActiveSOT552-1-40~852.7~3.6_tolerant_to_5.5 VDC2.7~5.511400
Package Information
Product IDPackage DescriptionOutline VersionReflow/Wave SolderingPackingProduct StatusPart NumberOrdering code(12NC)MarkingChemical ContentRoHS / Pb Free / RHFLeadFree Conversion DateEFRIFR(FIT)MTBF(hour)MSLMSL LF
PCA9527DPSOT552-1Reflow_Soldering_Profile SSOP-TSSOP-VSO-WAVE
Reflow_Soldering_Profile SSOP-TSSOP-VSO-WAVE
Reel 13" Q1/T1ActivePCA9527DP,118 (9352 891 05118)9527PCA9527DPAlways Pb-free0.02.05E811
3-channel bidirectional bus extender for HDMI, I2C-bus and SMBus pca9527dp
Level shifting techniques in I2C-bus design pca9685pw
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
Reflow_Soldering_Profile Wave_Soldering_Profile LPC1112FD20
plastic thin shri small outline package; 10 leads; body width 3 mm 74AXP2T08DP-Q100
Reflow_Soldering_Profile Wave_Soldering_Profile LPC1112FD20
SSOP-TSSOP-VSO-WAVE LPC1114FDH28
TSSOP10; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or... 74AXP2T08DP-Q100
PCA9527DP
PCA9633