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PCA9515: I2C-bus repeater

The PCA9515 is a BiCMOS 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 (SDAn) and the clock (SCLn) 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 PCA9515 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 morePCA9515s cannot be put in series.The PCA9515 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 PCA9515 will be propagated as a 'buffered low' with a slightly higher value. When this 'buffered low' is applied to another PCA9515, PCA9516A, or PCA9518A in series, the second PCA9515, PCA9516A, or PCA9518A will not recognize it as a 'regular low' and will not propagate it as a 'buffered low' again. The PCA9510A/9511A/9513A/9514A and PCA9512A cannot be used in series with the PCA9515, PCA9516A, or PCA9518A but can be used in series with themselves since they use shifting instead of static offsets to avoid lock-up conditions.

The PCA9515 SCLn/SDAn Ci is about 200 pF versus the normal < 10 pF when VCC= 0 V. The newer PCA9515A should be used in applications where power is secured to the repeater but an active bus remains on either set of SCLn/SDAn pins to prevent this increase in bus loading. Additionally, the PCA9515A has a wider voltage range of 2.3 V to 3.6 V and can be used in applications with lower voltage supply constraints.

PCA9515: Product Block Diagram

sot096-1_3d

1. The maximum system operating frequency may be less than 400 kHz because of the delays added by the repeater.

Data Sheets (1)

Application Notes (5)

Users Guides (4)

Brochures (3)

Package Information (2)

Packing (2)

Reports or Presentations (1)

Supporting Information (4)

IBIS Model

• PCA9515 IBIS model (REV 1.0) ZIP PCA9515_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
PCA9515DP		SOT505-1	Reflow_Soldering_Profile	Reel 13" Q1/T1	Active	PCA9515DP,118 (9352 686 35118)	9515	PCA9515DP		week 12, 2005	0.0	3.0	3.33E8	1	1
PCA9515D		SOT96-1	SO-SOJ-REFLOW SO-SOJ-WAVE SO-SOJ-REFLOW SO-SOJ-WAVE	Reel 13" Q1/T1	Active	PCA9515D,118 (9352 686 51118)	PCA9515	PCA9515D		week 5, 2005	0.0	3.0	3.33E8	1	1
				Bulk Pack	Active	PCA9515D,112 (9352 686 51112)	PCA9515	PCA9515D		week 5, 2005	0.0	3.0	3.33E8	1	1