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PCA9515A: 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.

PCA9515A: Product Block Diagram

sot096-1_3d

Data Sheets (1)

Application Notes (4)

Users Guides (4)

Brochures (4)

Package Information (2)

Packing (2)

Supporting Information (4)

IBIS Model

• PCA9515 IBIS model (REV 1.0) ibs PCA9515ADP 8/19/2014
• PCA9515 IBIS model (REV 1.0) ibs PCA9515A_1 8/19/2014

Ordering Information

Package Information

Product ID	Package Description	Outline Version	Reflow/Wave Soldering	Packing	Product Status	Part NumberOrdering code(12NC)	Marking	Chemical Content	RoHS / Pb Free / RHF	LeadFree Conversion Date	EFR	IFR(FIT)	MTBF(hour)	MSL	MSL LF
PCA9515AD		SOT96-1	SO-SOJ-REFLOW SO-SOJ-WAVE SO-SOJ-REFLOW SO-SOJ-WAVE	Reel 13" Q1/T1	Active	PCA9515AD,118 (9352 767 66118)	PA9515A	PCA9515AD		week 5, 2005	0.0	2.0	5E8	1	1
				Bulk Pack	Active	PCA9515AD,112 (9352 767 66112)	PA9515A	PCA9515AD		week 5, 2005	0.0	2.0	5E8	1	1
PCA9515ADP		SOT505-1	Reflow_Soldering_Profile	Reel 13" Q1/T1	Active	PCA9515ADP,118 (9352 759 98118)	9515A	PCA9515ADP		week 12, 2005	0.0	2.0	5E8	1	1
PCA9515ADP/DG		SOT505-1	Reflow_Soldering_Profile	Reel 13" Q1/T1	Withdrawn	PCA9515ADP/DG,118 (9352 858 93118)	9515A			Always Pb-free	0.0	2.0	5E8	1	1