TCA9509 Datasheet, PDF (1/14 Pages) Texas Instruments – LEVEL-TRANSLATING I2C/SMBUS BUS REPEATER

TCA9509
www.ti.com
LEVEL-TRANSLATING I²C/SMBUS BUS REPEATER
Check for Samples: TCA9509
SCPS225 – JUNE 2011
FEATURES
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• Two-Channel Bidirectional Buffer
• I²C Bus and SMBus Compatible
• Operating Supply Voltage Range of
0.9 V to 5.5 V on B side
• Operating Voltage Range of 2.7 V to V_CCB - 1V
on A Side
• Voltage-Level Translation From
0.9 V to (V_CCB - 1V) and 2.7 V to 5.5 V
• Active-High Repeater-Enable Input
• Requires no external pull-up resistors on
lower-voltage port-A
• Open-Drain I²C I/O
• 5.5-V Tolerant I²C 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 Repeater
• Powered-Off High-Impedance I²C bus pins
• Supports 400-kHz Fast I²C Bus operating
speeds
• 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)
V_CCA
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TCA9509
SCLA 2
67 SCLB
6 SDAB
SDAA 3
5 EN
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. ).
T_A
–40°C to 85°C
RVH - QFN
ORDERING INFORMATION
PACKAGES^{(1) (2)}
Tape and reel
7k
TOP-SIDE MARKING
(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.
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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.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2011, Texas Instruments Incorporated