TCA9517A Datasheet, PDF (1/17 Pages) Texas Instruments – LEVEL-TRANSLATING I2C BUS REPEATER

TCA9517A
www.ti.com
SCPS245A – DECEMBER 2012 – REVISED APRIL 2013
LEVEL-TRANSLATING I²C BUS REPEATER
Check for Samples: TCA9517A
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 A Side
• Operating Supply Voltage Range of
2.7 V to 5.5 V on B Side
• Voltage-Level Translation From 0.9 V to 5.5 V
and 2.7 V to 5.5 V
• Footprint and Function Replacement for
PCA9515B
• Active-High Repeater-Enable Input
• 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
• Powered-Off High-Impedance I²C Pins
• 400-kHz Fast I²C Bus
• Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
• ESD Protection Exceeds JESD 22
– 5500-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
– 1000-V Charged-Device Model (C101)
DGK PACKAGE
(TOP VIEW)
V
CCA
1
SCLA 2
SDAA 3
GND 4
8
V
CCB
7 SCLB
6 SDAB
5 EN
DESCRIPTION/ORDERING INFORMATION
This dual bidirectional I²C buffer is operational at 2.7 V to 5.5 V.
The TCA9517A is a BiCMOS integrated circuit intended for I²C bus and SMBus systems. It can provide
bidirectional voltage-level translation (up-translation/down-translation) between low voltages (down to 0.9 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 TCA9517A buffers both the serial data (SDA) and the serial clock (SCL) signals on the I²C bus, thus
allowing two buses of 400-pF bus capacitance to be connected in an I²C application. This device can also be
used to isolate two halves of a bus for voltage and capacitance.
The TCA9517A has two types of drivers—A-side drivers and B-side drivers. All inputs and I/Os are overvoltage
tolerant to 5.5 V, even when the device is unpowered (V_CCB and/or V_CCA = 0 V).
The TCA9517A offers a higher contention level threshold, V_ILC, than the TCA9517 and can be used in
applications where a larger input logic low is required on the B-side.
T_A
–40°C to 85°C
ORDERING INFORMATION
PACKAGES^{(1) (2)}
ORDERABLE PART NUMBER
VSSOP – DGK
Tape and reel
TCA9517ADGKR
TOP-SIDE MARKING
BSK
(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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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.
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