• 简体中文
• English

PCA9516A: 5-channel I2C-bus hub

The PCA9516A 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 (SDAn) and the clock (SCLn) lines, thus enabling five buses of 400 pF.

The I²C-bus capacitance limit of 400 pF restricts the number of devices and bus length. Using the PCA9516A enables the system designer to divide the bus into five segments off of a hub where any segment-to-segment transition sees only one repeater delay.

It can also be used to run different buses at 5 V and 3.3 V or 400 kHz and 100 kHz buses where the 100 kHz bus is isolated when 400 kHz operation of the other bus is required.

Two or morePCA9516As cannot be put in series.The PCA9516A 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 of each repeater in the hub. A 'regular LOW' applied at the input of a PCA9516A will be propagated as a 'buffered LOW' with a slightly higher value on all the enabled outputs. When this 'buffered LOW' is applied to another PCA9515A, PCA9516A, or PCA9518A in series, the second PCA9515A, 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 PCA9515A, PCA9516A, or PCA9518A, but can be used in series with themselves since they use shifting instead of static offsets to avoid lock-up conditions.

PCA9516A: Product Block Diagram

Outline 3d SOT403-1

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 (4)

Users Guides (4)

Brochures (3)

Package Information (2)

Packing (2)

Supporting Information (3)

IBIS Model

• PCA9516 IBIS model (REV 1.0) ibs PCA9516APW 8/19/2014
• PCA9516 IBIS model (REV 1.0) ibs PCA9516A_3_3V 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
PCA9516AD		SOT109-1	SO-SOJ-REFLOW SO-SOJ-WAVE SO-SOJ-REFLOW SO-SOJ-WAVE	Reel 13" Q1/T1	Active	PCA9516AD,118 (9352 758 82118)	PCA9516AD	PCA9516AD		week 13, 2005	0.0	2.0	5E8	1	1
				Bulk Pack	Active	PCA9516AD,112 (9352 758 82112)	PCA9516AD	PCA9516AD		week 13, 2005	0.0	2.0	5E8	1	1
PCA9516APW		SOT403-1	SSOP-TSSOP-VSO-WAVE	Reel 13" Q1/T1	Active	PCA9516APW,118 (9352 758 83118)	PA9516A	PCA9516APW		week 13, 2005	0.0	2.0	5E8	1	1
				Bulk Pack	Active	PCA9516APW,112 (9352 758 83112)	PA9516A	PCA9516APW		week 13, 2005	0.0	2.0	5E8	1	1