PCA9515A Status: ACTIVE

Dual Bidirectional I2C Bus and SMBus Repeater

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Datasheet

Dual Bidirectional I2C Bus and SMBus Repeater (Rev. B) (PDF 577 KB)
11 Oct 2007

	PCA9515A
No. of Outputs	2
VCC(Min)(V)	2.3
VCC(Max)(V)	3.6
Pin/Package	8MSOP, 8PDIP, 8SOIC, 8SON, 8TSSOP
Max Frequency(kHz)	400
Vcc range(V)	2.3 to 5.5
Channel Width	2
Master Side I2C Bus Capacitance Supported(pF)	400
Slave Side I2C Bus Capacitance Supported(pF)	400
5V Tolerant I/O	Yes
Open–Drain I/O Type	Yes
Enable Pin	Yes
	Samples
	Inventory

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Product Information

Features

Two-Channel Bidirectional Buffers
I²C Bus and SMBus Compatible
Active-High Repeater-Enable Input
Open-Drain I²C I/O
5.5-V Tolerant I²C I/O and Enable Input Support Mixed-Mode Signal Operation
Lockup-Free Operation
Accommodates Standard Mode and Fast Mode I²C Devices and Multiple Masters
Supports Arbitration and Clock Stretching Across the Repeater
Powered-Off High-Impedance I²C Pins
Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
ESD Protection Exceeds JESD 22
- 2000-V Human-Body Model (A114-A)
- 200-V Machine Model (A115-A)
- 1000-V Charged-Device Model (C101)

DESCRIPTION/ORDERING INFORMATION

This dual bidirectional I²C buffer is operational at 2.3-V to 3.6-V V_CC.

The PCA9515A is a BiCMOS integrated circuit intended for I²C bus and SMBus systems applications. The device contains two identical bidirectional open-drain buffer circuits that enable I²C and similar bus systems to be extended without degradation of system performance. Both buffers specifically are designed to support the standard low-level-contention arbitration of the I²C bus and support clock stretching.

The PCA9515A buffers both the serial data (SDA) and serial clock (SCL) signals on the I²C bus, while retaining all the operating modes and features of the I²C system. This enables two buses of 400-pF bus capacitance to be connected in an I²C application.

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, accommodating more I²C devices or longer trace lengths.

The PCA9515A has an active-high enable (EN) input with an internal pullup, which allows the user to select when the repeater is active. This can be used to isolate a badly behaved slave on power-up reset. It never should change state during an I²C operation, because disabling during a bus operation hangs the bus, and enabling part way through a bus cycle could confuse the I²C parts being enabled. The EN input should change state only when the global bus and the repeater port are in an idle state, to prevent system failures.

The PCA9515A also can be used to run two buses: one at 5-V interface levels and the other at 3.3-V interface levels, or one at 400-kHz operating frequency and the other at 100-kHz operating frequency. If the two buses are operating at different frequencies, the 100-kHz bus must be isolated when the 400-kHz operation of the other bus is required. If the master is running at 400 kHz, the maximum system operating frequency may be less than 400 kHz, because of the delays that are added by the repeater.

The output low levels for each internal buffer are approximately 0.5 V, but the input voltage of each internal buffer must be 70 mV or more below the output low level, when the output internally is driven low. This prevents a lockup condition from occurring when the input low condition is released.

Two or more PCA9515A devices cannot be used in series. The PCA9515A design does not allow this configuration. Because there is no direction pin, slightly different valid low-voltage levels are used to avoid lockup conditions between the input and the output of each repeater. A valid low applied at the input of a PCA9515A is propagated as a buffered low with a slightly higher value on the enabled outputs. When this buffered low is applied to another PCA9515A-type device in series, the second device does not recognize it as a valid low and does not propagate it as a buffered low again.

The device contains a power-up control circuit that sets an internal latch to prevent the output circuits from becoming active until V_CC is at a valid level (V_CC = 2.3 V).

As with the standard I²C system, pullup resistors are required to provide the logic high levels on the buffered bus. The PCA9515A has standard open-collector configuration of the I²C bus. The size of these pullup resistors depends on the system, but each side of the repeater must have a pullup resistor. The device is designed to work with Standard Mode and Fast Mode I²C devices in addition to SMBus devices. Standard Mode I²C devices only specify 3 mA in a generic I²C system where Standard Mode devices and multiple masters are possible. Under certain conditions, high termination currents can be used.

Pricing / Packaging / CAD Design Tools / Samples

			Price	Packaging			CAD Design Tools		Samples
Device	Status	Temp (^oC)	Price \| Quantity	Package \| Pins	Top Side Marking	Package QTY \| Package Carrier	Symbols	Footprints	Samples
PCA9515AD	ACTIVE	-40 to 85	1.05 \| 1ku	SOIC (D) \| 8	View	75 \| TUBE		Purchase Samples
PCA9515ADG4	ACTIVE	-40 to 85	1.05 \| 1ku	SOIC (D) \| 8	View	75 \| TUBE	Purchase Samples
PCA9515ADGKR	ACTIVE	-40 to 85	0.95 \| 1ku	MSOP (DGK) \| 8	View	2500 \| LARGE T&R
PCA9515ADGKRG4	ACTIVE	-40 to 85	0.95 \| 1ku	MSOP (DGK) \| 8	View	2500 \| LARGE T&R
PCA9515ADGKT	ACTIVE	-40 to 85	1.05 \| 1ku	MSOP (DGK) \| 8	View	250 \| SMALL T&R	Purchase Samples
PCA9515ADGKTG4	ACTIVE	-40 to 85	1.05 \| 1ku	MSOP (DGK) \| 8	View	250 \| SMALL T&R	Purchase Samples
PCA9515ADR	ACTIVE	-40 to 85	0.95 \| 1ku	SOIC (D) \| 8	View	2500 \| LARGE T&R
PCA9515ADRG4	ACTIVE	-40 to 85	0.95 \| 1ku	SOIC (D) \| 8	View	2500 \| LARGE T&R
PCA9515ADRGR	ACTIVE	-40 to 85	0.95 \| 1ku	SON (DRG) \| 8		1000 \| LARGE T&R
PCA9515ADT	ACTIVE	-40 to 85	0.95 \| 1ku	SOIC (D) \| 8	View	250 \| SMALL T&R		Purchase Samples
PCA9515ADTG4	ACTIVE	-40 to 85	0.95 \| 1ku	SOIC (D) \| 8	View	250 \| SMALL T&R	Purchase Samples
PCA9515AP	ACTIVE	-40 to 85	0.95 \| 1ku	PDIP (P) \| 8	View	50 \| TUBE		Purchase Samples
PCA9515APW	ACTIVE	-40 to 85	1.05 \| 1ku	TSSOP (PW) \| 8	View	150 \| TUBE	Purchase Samples
PCA9515APWG4	ACTIVE	-40 to 85	1.05 \| 1ku	TSSOP (PW) \| 8	View	150 \| TUBE	Purchase Samples
PCA9515APWR	ACTIVE	-40 to 85	0.95 \| 1ku	TSSOP (PW) \| 8	View	2000 \| LARGE T&R
PCA9515APWRG4	ACTIVE	-40 to 85	0.95 \| 1ku	TSSOP (PW) \| 8	View	2000 \| LARGE T&R
PCA9515APWT	ACTIVE	-40 to 85	0.95 \| 1ku	TSSOP (PW) \| 8	View	250 \| SMALL T&R	Purchase Samples
PCA9515APWTG4	ACTIVE	-40 to 85	0.95 \| 1ku	TSSOP (PW) \| 8	View	250 \| SMALL T&R	Purchase Samples

* Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For higher volume price quotes,prices in local currency or delivery quotes, please contact your local Texas Instruments Sales Office or Authorized Distributor.

Inventory

Reported Distributor Inventory as of 11:37 AM GMT, 08 Nov 2009
Region	Company	In Stock	Purchase
TI Lead Time*: 14 WeeksPCA9515AD
Americas	Arrow	334
	Avnet	355
	Newark	132
Europe	Avnet-SILICA	>1k
Worldwide	DigiKey	Available
Worldwide	Mouser Electronics	7
TI Lead Time*: 14 WeeksPCA9515ADG4
Worldwide	DigiKey	Available
TI Lead Time*: 18 WeeksPCA9515ADGKR
Americas	Rochester Electronics	>1k
Asia	WPI	>1k
Worldwide	DigiKey	>1k
Worldwide	Mouser Electronics	>1k
TI Lead Time*: 18 WeeksPCA9515ADGKRG4
Worldwide	DigiKey	Available
TI Lead Time*: 14 WeeksPCA9515ADGKT
Worldwide	DigiKey	Available
TI Lead Time*: 14 WeeksPCA9515ADGKTG4
Worldwide	DigiKey	Available
TI Lead Time*: 18 WeeksPCA9515ADR
Americas	Rochester Electronics	>1k
Europe	Avnet-SILICA	>1k
Worldwide	DigiKey	>1k
Worldwide	Mouser Electronics	>1k
TI Lead Time*: 18 WeeksPCA9515ADRG4
Worldwide	DigiKey	Available
TI Lead Time*: 14 WeeksPCA9515ADRGR
Asia	WPI	853
Worldwide	DigiKey	>1k
TI Lead Time*: 14 WeeksPCA9515ADT
Americas	Arrow	1k
Asia	WPI	57
Worldwide	DigiKey	Available
Worldwide	Mouser Electronics	468
TI Lead Time*: 14 WeeksPCA9515ADTG4
Worldwide	DigiKey	Available
TI Lead Time*: 18 WeeksPCA9515AP
None Reported View Distributors
TI Lead Time*: 14 WeeksPCA9515APW
Americas	Arrow	63
Americas	Rochester Electronics	>1k
TI Lead Time*: 14 WeeksPCA9515APWG4
None Reported View Distributors
TI Lead Time*: 20 WeeksPCA9515APWR
Americas	Arrow	>1k
TI Lead Time*: 20 WeeksPCA9515APWRG4
None Reported View Distributors
TI Lead Time*: 20 WeeksPCA9515APWT
None Reported View Distributors
TI Lead Time*: 20 WeeksPCA9515APWTG4
None Reported View Distributors
View all Distributors

** Lead time information is not available at this time. However, our information is updated daily so please check back with us soon. Please contact your preferred TI Authorized Distributor for additional information.

Quality & Lead (Pb)-Free Data

	Product Content				DPPM / MTBF / FIT Rate
Device	Eco Plan*	Lead / Ball Finish	MSL Rating / Peak Reflow	Details	Details
PCA9515AD	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9515ADG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9515ADGKR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9515ADGKRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9515ADGKT	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9515ADGKTG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9515ADR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9515ADRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9515ADRGR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
PCA9515ADT	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9515ADTG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9515AP	Pb-Free (RoHS)	CU NIPDAU	N/A for Pkg Type	View	View
PCA9515APW	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9515APWG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9515APWR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9515APWRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9515APWT	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9515APWTG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View

* The planned eco-friendly classification: Pb-Free (RoHS) or Pb-Free (RoHS Exempt) or Green (RoHS & no Sb/Br) - please click on the Product Content Details "View" link in the table above for the latest availability information and additional product content details.

If the information you are requesting is not available online at this time, contact one of our Product Information Centers regarding the availability of this information.

Technical Documents

Most useful technical documents for PCA9515A

Datasheet

Dual Bidirectional I2C Bus and SMBus Repeater (Rev. B) (PDF, 577 KB)
11 Oct 2007

Application Notes

Shelf-Life Evaluation of Lead-Free Component Finishes (HTM, 8 KB) 26969 views
24 May 2004 Read Abstract
Understanding and Interpreting Standard-Logic Data Sheets (Rev. B) (HTM, 8 KB) 21380 views
28 May 2003 Read Abstract
Programming Fun Lights With TI's TCA6507 (HTM, 8 KB) 3462 views
30 Nov 2007 Read Abstract
Troubleshooting I2C Bus Protocol (HTM, 8 KB) 60 views
19 Oct 2009 Read Abstract

Selection Guides

Logic Guide 2009 (Rev. Z) (PDF, 4263 KB) 88618 views
23 Jul 2009
I2C Guide (Rev. B) (PDF, 2830 KB) 12900 views
12 Aug 2009

Simulation Models

HSpice Model
- HSPICE Model for PCA9515A (ZIP, 216 KB) 297 views
  17 Feb 2006

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PCA9515A Status: ACTIVE

Dual Bidirectional I2C Bus and SMBus Repeater

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