TCA9617B Datasheet, PDF (1/24 Pages) Texas Instruments – Level-Translating FM+ I2C Bus Repeater

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TCA9617B
SCPS259A – DECEMBER 2014 – REVISED DECEMBER 2014
TCA9617B Level-Translating FM+ I²C Bus Repeater
1 Features
•1 Two-Channel Bidirectional I²C Buffer
• Support for Standard Mode, Fast Mode (400 kHz),
and Fast Mode+ (1 MHz) I²C Operation
• Operating Supply Voltage Range of 0.8 V to 5.5 V
on A-Side
• Operating Supply Voltage Range of 2.2 V to 5.5 V
on B-Side
• Voltage-Level Translation From 0.8 V to 5.5 V and
2.2 V to 5.5 V
• Footprint and Function Replacement for TCA9517
• Active-High Repeater-Enable Input
• Open-Drain I²C I/O
• 5.5-V Tolerant I²C and Enable Input Support
• Lockup-Free Operation
• Powered-Off High-Impedance I²C Bus Pins
• Support for Clock Stretching and Multiple Master
Arbitration Across The Device
• Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
• ESD Protection Exceeds JESD 22
– 4000-V Human-Body Model (A114-A)
– 1500-V Charged-Device Model (C101)
2 Applications
• Servers
• Routers (Telecom Switching Equipment)
• Industrial Equipment
• Products With Many I²C Slaves and/or Long PCB
Traces
3 Description
The TCA9617B is a BiCMOS dual bidirectional buffer
intended for I²C bus and SMBus systems. It can
provide bidirectional voltage-level translation (up-
translation and down-translation) between low
voltages (down to 0.8 V) and higher voltages (2.2 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 TCA9617B buffers both the serial data (SDA)
and the serial clock (SCL) signals on the I²C bus,
allowing two buses of 550 pF to be connected in an
I²C application. This device can also be used to
isolate two halves of a bus for voltage and
capacitance.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TCA9617B
VSSOP (8)
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
4 Simplified Schematic
I²C or SMBus
Master
(e.g. Processor)
VCCA
VCCB
SCLA
SDAA
SCLB
SDAB
TCA9617B
EN
GND
I²C slave devices
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.