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PCA9306 Datasheet Preview

PCA9306 Datasheet

SMBus Voltage-Level Translator

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PCA9306
SCPS113M – OCTOBER 2004 – REVISED APRIL 2019
PCA9306 Dual Bidirectional I2C Bus and SMBus Voltage-Level Translator
1 Features
1 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 Translation Between
– 1.2-V VREF1 and 1.8-V, 2.5-V, 3.3-V,
or 5-V VREF2
– 1.8-V VREF1 and 2.5-V, 3.3-V, or 5-V VREF2
– 2.5-V VREF1 and 3.3-V or 5-V VREF2
– 3.3-V VREF1 and 5-V VREF2
• Provides Bidirectional Voltage Translation with no
Direction Pin
• Low 3.5-Ω ON-state Resistance 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
• Lockup-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)
– 1000-V Charged-Device Model (C101)
2 Applications
• I2C, SMBus, PMBus, MDIO, UART, low-speed
SDIO, GPIO, and other two-signal interfaces
• Servers
• Routers (Telecom Switching Equipment)
• Personal Computers
• Industrial Automation
3 Description
The PCA9306 device is a dual bidirectional I2C and
SMBus voltage-level translator with an enable (EN)
input, and is operational from 1.2-V to 3.3-V VREF1
and 1.8-V to 5.5-V VREF2.
The PCA9306 device allows bidirectional voltage
translations between 1.2 V and 5 V, without the use
of a direction pin. The low ON-state resistance (RON)
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 addition to voltage translation, the PCA9306 device
can be used to isolate a 400-kHz bus from a 100-kHz
bus by controlling the EN pin to disconnect the slower
bus during fast-mode communication.
Device Information(1)
PART NUMBER PACKAGE
BODY SIZE (NOM)
SSOP (8)
2.95 mm x 2.80 mm
PCA9306
VSSOP (8)
X2SON (8)
2.30 mm x 2.00 mm
1.40 mm x 1.00 mm
DSBGA (8)
1.98 mm x 0.98 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Simplified Application Diagram
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.




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PCA9306 Datasheet Preview

PCA9306 Datasheet

SMBus Voltage-Level Translator

No Preview Available !

PCA9306
SCPS113M – OCTOBER 2004 – REVISED APRIL 2019
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 4
6 Specifications......................................................... 5
6.1 Absolute Maximum Ratings ..................................... 5
6.2 ESD Ratings.............................................................. 5
6.3 Recommended Operating Conditions....................... 5
6.4 Thermal Information .................................................. 5
6.5 Electrical Characteristics........................................... 6
6.6 Switching Characteristics AC Performance
(Translating Down) (EN = 3.3 V) .............................. 6
6.7 Switching Characteristics AC Performance
(Translating Down) (EN = 2.5 V) .............................. 6
6.8 Switching Characteristics AC Performance
(Translating Up) (EN = 3.3 V) ................................... 6
6.9 Switching Characteristics AC Performance
(Translating Up) (EN = 2.5 V) ................................... 7
6.10 Typical Characteristics ............................................ 7
7 Parameter Measurement Information .................. 8
8 Detailed Description .............................................. 9
8.1 Overview ................................................................... 9
8.2 Functional Block Diagram ....................................... 14
8.3 Feature Description................................................. 14
8.4 Device Functional Modes........................................ 15
9 Application and Implementation ........................ 16
9.1 Application Information............................................ 16
9.2 Typical Application .................................................. 16
10 Power Supply Recommendations ..................... 19
11 Layout................................................................... 19
11.1 Layout Guidelines ................................................. 19
11.2 Layout Example .................................................... 19
12 Device and Documentation Support ................. 20
12.1 Receiving Notification of Documentation Updates 20
12.2 Community Resource............................................ 20
12.3 Trademarks ........................................................... 20
12.4 Electrostatic Discharge Caution ............................ 20
12.5 Glossary ................................................................ 20
13 Mechanical, Packaging, and Orderable
Information ........................................................... 20
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision L (April 2016) to Revision M
Page
• Changed the DQE package family From: VSSON to X2SON................................................................................................ 4
• Added new section to Overview ............................................................................................................................................. 9
• Changed the labels in Figure 19. The red curve is > 2 V, the black curve is 2 V. ........................................................... 18
Changes from Revision K (October 2014) to Revision L
Page
• Changed "ON-State Connection " to "ON-state Resistance" ................................................................................................. 1
• Deleted machine model ESD rating ...................................................................................................................................... 1
• Added "bus" following "100-kHz" in the last sentence of the Description section.................................................................. 1
• Changed body-size dimensions in the Device Information table .......................................................................................... 1
• Replaced pinout diagrams ...................................................................................................................................................... 4
• Added I/O column to the Pin Functions table ........................................................................................................................ 4
• Deleted RVH package from Pin Configuration and Functions section .................................................................................. 4
• Moved Tstg from Handling Ratings to Absolute Maximum Ratings......................................................................................... 5
• Changed Handling Ratings to ESD Ratings........................................................................................................................... 5
• Added a note following the Electrical Characteristics table.................................................................................................... 6
• Added Figure 4 to the Parameter Measurement Information section .................................................................................... 8
• Changed Figure 5................................................................................................................................................................... 8
• Changed "repeater" to "level shifter" in second paragraph of the Overview section ............................................................ 9
• Changed the Design Requirements table ........................................................................................................................... 17
• Deleted the bottommost row of the Design Requirements table.......................................................................................... 17
• Corrected equation from fknee= 0.5 / RT (10%–80%) to fknee= 0.5 / RT (10%–90%) ............................................................ 18
2
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Copyright © 2004–2019, Texas Instruments Incorporated


Part Number PCA9306
Description SMBus Voltage-Level Translator
Maker etcTI
Total Page 3 Pages
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