PCA9306 Status: ACTIVE

Dual Bi-Directional I2C-Bus and SMBus Voltage Level-Translator

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Datasheet

Dual Bidirectional I2C Bus and SMBus Voltage-Level Translator (Rev. I) (PDF 425 KB)
11 Jul 2008

	PCA9306
No. of Outputs	2
tpd max(ns)	1.5
Operating Temp Range(Celsius)	-40 to 85
Rating	Catalog
fSCLK(Max)(MHz)	400
Pin/Package	8SM8, 8US8
Max Frequency(kHz)	400
Function	Voltage Translator
Vcc range(V)	0 to 5.5
Enable Pin	Yes
Open–Drain I/O Type	Yes
5V Tolerant I/O	Yes
	Samples
	Inventory

Other qualified versions of PCA9306

Version	Part Number	Definition
Automotive	PCA9306-Q1	Q100 devices qualified for high-reliability automotive applications targeting zero defects

Customers Who Evaluated This Product Also Evaluated

SN74LVC1G04: Single Inverter

TPD4S009: 4-Channel ESD Solution for High-Speed Differential Interface

SN74AVC8T245: 8-Bit Dual-Supply Bus Transceiver with Configurable Voltage Translation and 3-State Outputs

Product Information

Features

2-Bit Bidirectional Translator for SDA and SCL Lines in Mixed-Mode I²C Applications
I²C and SMBus Compatible
Less Than 1.5-ns Maximum Propagation Delay to Accommodate Standard-Mode and Fast-Mode I²C Devices and Multiple Masters
Allows Voltage-Level Translator Between
- 1.2-V V_REF1 and 1.8-V, 2.5-V, 3.3-V,
  or 5-V V_REF2
- 1.8-V V_REF1 and 2.5-V, 3.3-V, or 5-V V_REF2
- 2.5-V V_REF1 and 3.3-V or 5-V V_REF2
- 3.3-V V_REF1 and 5-V V_REF2
Provides Bidirectional Voltage Translation With No Direction Pin
Low 3.5-Ω ON-State Connection Between Input and Output Ports Provides Less Signal Distortion
Open-Drain I²C I/O Ports (SCL1, SDA1, SCL2, and SDA2)
5-V Tolerant I²C I/O Ports to Support Mixed-Mode Signal Operation
High-Impedance SCL1, SDA1, SCL2, and SDA2 Pins for EN = Low
Lock-Up-Free Operation for Isolation When EN = Low
Flow-Through Pinout for Ease of Printed Circuit Board Trace Routing
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 and SMBus voltage-level translator, with an enable (EN) input, is operational from 1.2-V to 3.3-V V_REF1 and 1.8-V to 5.5-V V_REF2.

The PCA9306 allows bidirectional voltage translations between 1.2 V and 5 V, without the use of a direction pin. The low ON-state resistance (r_on) of the switch allows connections to be made with minimal propagation delay. When EN is high, the translator switch is ON, and the SCL1 and SDA1 I/O are connected to the SCL2 and SDA2 I/O, respectively, allowing bidirectional data flow between ports. When EN is low, the translator switch is off, and a high-impedance state exists between ports.

In I²C applications, the bus capacitance limit of 400 pF restricts the number of devices and bus length. Using the PCA9306 enables the system designer to isolate two halves of a bus; thus, more I²C devices or longer trace length can be accommodated.

The PCA9306 also can be used to run two buses, 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 added by the repeater.

As with the standard I²C system, pullup resistors are required to provide the logic high levels on the translator's bus. The PCA9306 has a 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.

When the SDA1 or SDA2 port is low, the clamp is in the ON state, and a low resistance connection exists between the SDA1 and SDA2 ports. Assuming the higher voltage is on the SDA2 port when the SDA2 port is high, the voltage on the SDA1 port is limited to the voltage set by V_REF1. When the SDA1 port is high, the SDA2 port is pulled to the drain pullup supply voltage (V_DPU) by the pullup resistors. This functionality allows a seamless translation between higher and lower voltages selected by the user, without the need for directional control. The SCL1/SCL2 channel also functions as the SDA1/SDA2 channel.

All channels have the same electrical characteristics, and there is minimal deviation from one output to another in voltage or propagation delay. This is a benefit over discrete transistor voltage translation solutions, since the fabrication of the switch is symmetrical. The translator provides excellent ESD protection to lower-voltage devices and at the same time protects less ESD-resistant devices.

Pricing / Packaging / CAD Design Tools / Samples

			Price	Packaging		CAD Design Tools		Samples
Device	Status	Temp (^oC)	Price \| Quantity	Package \| Pins	Package QTY \| Package Carrier	Symbols	Footprints	Samples
PCA9306DCTR	ACTIVE	-40 to 85	0.26 \| 1ku	SM8 (DCT) \| 8	3000 \| LARGE T&R
PCA9306DCTRE4	ACTIVE	-40 to 85	0.26 \| 1ku	SM8 (DCT) \| 8	3000 \| LARGE T&R
PCA9306DCTRG4	ACTIVE	-40 to 85	0.26 \| 1ku	SM8 (DCT) \| 8	3000 \| LARGE T&R
PCA9306DCTT	ACTIVE	-40 to 85	0.40 \| 1ku	SM8 (DCT) \| 8	250 \| SMALL T&R		Purchase Samples
PCA9306DCTTE4	ACTIVE	-40 to 85	0.40 \| 1ku	SM8 (DCT) \| 8	250 \| SMALL T&R		Purchase Samples
PCA9306DCTTG4	ACTIVE	-40 to 85	0.40 \| 1ku	SM8 (DCT) \| 8	250 \| SMALL T&R			Purchase Samples
PCA9306DCUR	ACTIVE	-40 to 85	0.26 \| 1ku	US8 (DCU) \| 8	3000 \| LARGE T&R
PCA9306DCURE4	ACTIVE	-40 to 85	0.26 \| 1ku	US8 (DCU) \| 8	3000 \| LARGE T&R
PCA9306DCURG4	ACTIVE	-40 to 85	0.26 \| 1ku	US8 (DCU) \| 8	3000 \| LARGE T&R
PCA9306DCUT	ACTIVE	-40 to 85	0.40 \| 1ku	US8 (DCU) \| 8	250 \| SMALL T&R		Purchase Samples
PCA9306DCUTE4	ACTIVE	-40 to 85	0.40 \| 1ku	US8 (DCU) \| 8	250 \| SMALL T&R		Purchase Samples
PCA9306DCUTG4	ACTIVE	-40 to 85	0.40 \| 1ku	US8 (DCU) \| 8	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 11:35 AM GMT, 06 Nov 2009
Region	Company	In Stock	Purchase
TI Lead Time*: 15 WeeksPCA9306DCTR
Americas	Arrow	>1k
	Newark	>1k
	Rochester Electronics	>1k
Asia	Farnell Asia	342
Asia	WPI	>1k
Europe	Avnet-SILICA	>1k
	Compel	>1k
	Farnell	203
Worldwide	DigiKey	>1k
Worldwide	Mouser Electronics	789
TI Lead Time*: 15 WeeksPCA9306DCTRE4
Americas	Avnet	>1k
Worldwide	DigiKey	Available
TI Lead Time*: 15 WeeksPCA9306DCTRG4
Worldwide	DigiKey	Available
TI Lead Time*: 12 WeeksPCA9306DCTT
Americas	Arrow	>1k
	Avnet	>1k
	Newark	706
Europe	Arrow Southern Europe	250
Europe	Avnet-SILICA	2
Worldwide	DigiKey	Available
Worldwide	Mouser Electronics	942
TI Lead Time*: 12 WeeksPCA9306DCTTE4
Worldwide	DigiKey	Available
Worldwide	Mouser Electronics	154
TI Lead Time*: 12 WeeksPCA9306DCTTG4
Worldwide	DigiKey	Available
TI Lead Time*: 15 WeeksPCA9306DCUR
Americas	Arrow	>1k
Americas	Rochester Electronics	>1k
Asia	WPI	241
Worldwide	DigiKey	>1k
Worldwide	Mouser Electronics	>1k
TI Lead Time*: 15 WeeksPCA9306DCURE4
Worldwide	DigiKey	Available
TI Lead Time*: 15 WeeksPCA9306DCURG4
Worldwide	DigiKey	Available
TI Lead Time*: 15 WeeksPCA9306DCUT
Americas	Newark	>1k
Europe	Avnet-SILICA	>1k
Worldwide	DigiKey	Available
Worldwide	Mouser Electronics	>1k
TI Lead Time*: 15 WeeksPCA9306DCUTE4
Asia	Farnell Asia	>1k
Europe	Farnell	>1k
Worldwide	DigiKey	Available
Worldwide	Mouser Electronics	600
TI Lead Time*: 15 WeeksPCA9306DCUTG4
Americas	Avnet	>1k
Europe	EBV Elektronik	250
Worldwide	DigiKey	Available
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
PCA9306DCTR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9306DCTRE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9306DCTRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9306DCTT	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9306DCTTE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9306DCTTG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9306DCUR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9306DCURE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9306DCURG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9306DCUT	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9306DCUTE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
PCA9306DCUTG4	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 PCA9306

Datasheet

Dual Bidirectional I2C Bus and SMBus Voltage-Level Translator (Rev. I) (PDF, 425 KB)
11 Jul 2008

Application Notes

Shelf-Life Evaluation of Lead-Free Component Finishes (HTM, 8 KB) 26941 views
24 May 2004 Read Abstract
Understanding and Interpreting Standard-Logic Data Sheets (Rev. B) (HTM, 8 KB) 21328 views
28 May 2003 Read Abstract
Programming Fun Lights With TI's TCA6507 (HTM, 8 KB) 3455 views
30 Nov 2007 Read Abstract

Selection Guides

Logic Guide 2009 (Rev. Z) (PDF, 4263 KB) 88336 views
23 Jul 2009
I2C Guide (Rev. B) (PDF, 2830 KB) 12794 views
12 Aug 2009

Simulation Models

HSpice Model
- HSPICE MODEL OF PCA9306 (Rev. A) (ZIP, 81 KB) 559 views
  13 Feb 2006
IBIS Model
- PCA9306 IBIS Model (Rev. A) (ZIP, 54 KB) 423 views
  29 Apr 2009

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All End-Equipment

PCA9306 Status: ACTIVE

Dual Bi-Directional I2C-Bus and SMBus Voltage Level-Translator

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