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TCA9509 Datasheet(PDF) 1 Page - Texas Instruments

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No. de pieza TCA9509
Descripción Electrónicos  LEVEL-TRANSLATING I2C/SMBUS BUS REPEATER
Download  14 Pages
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI1 - Texas Instruments

TCA9509 Datasheet(HTML) 1 Page - Texas Instruments

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V
CCA
SCLA
SDAA
SCLB
SDAB
EN
TCA9509
TCA9509
www.ti.com
SCPS225
– JUNE 2011
LEVEL-TRANSLATING I2C/SMBUS BUS REPEATER
Check for Samples: TCA9509
1
FEATURES
Two-Channel Bidirectional Buffer
Lockup-Free Operation
I2C Bus and SMBus Compatible
Accommodates Standard Mode and Fast Mode
I2C Devices and Multiple Masters
Operating Supply Voltage Range of
0.9 V to 5.5 V on B side
Supports Arbitration and Clock Stretching
Across Repeater
Operating Voltage Range of 2.7 V to VCCB - 1V
on A Side
Powered-Off High-Impedance I2C bus pins
Voltage-Level Translation From
Supports 400-kHz Fast I2C Bus operating
0.9 V to (VCCB - 1V) and 2.7 V to 5.5 V
speeds
Active-High Repeater-Enable Input
Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
Requires no external pull-up resistors on
lower-voltage port-A
ESD Protection Exceeds JESD 22
Open-Drain I2C I/O
– 2000-V Human-Body Model (A114-A)
5.5-V Tolerant I2C and Enable Input Support
– 1000-V Charged-Device Model (C101)
Mixed-Mode Signal Operation
DESCRIPTION/ORDERING INFORMATION
This TCA9509 integrated circuit is an I2C bus/SMBus Repeater for use in I2C/SMBus systems. It can also provide
bidirectional voltage-level translation (up-translation/down-translation) between low voltages (down to 1.0 V) and
higher voltages (2.7 V to 5.5 V) in mixed-mode applications. This device enables I2C and similar bus systems to
be extended, without degradation of performance even during level shifting.
The TCA9509 buffers both the serial data (SDA) and the serial clock (SCL) signals on the I2C bus, thus allowing
400-pF bus capacitance on the B-side. This device can also be used to isolate two halves of a bus for voltage
and capacitance.
The TCA9509 has two types of drivers
– A-side drivers and B-side drivers. All inputs and B-side I/O’s are
overvoltage tolerant to 5.5V. The A-side I/O
’s are overvoltage tolerant to 5.5V when the device is unpowered
(VCCB and/or VCCA=0V. ).
ORDERING INFORMATION
TA
PACKAGES(1) (2)
TOP-SIDE MARKING
–40°C to 85°C
RVH - QFN
Tape and reel
7k
(1)
Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.
(2)
For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
website at www.ti.com.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Copyright
© 2011, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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