TCA9517A Repeater Datasheet

TCA9517A Datasheet, PDF, Equivalent


Part Number

TCA9517A

Description

Level-Shifting I2C Bus Repeater

Manufacture

etcTI

Total Page 23 Pages
Datasheet
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TCA9517A
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TCA9517A
SCPS245C – DECEMBER 2012 – REVISED DECEMBER 2018
TCA9517A Level-Shifting I2C Bus Repeater
1 Features
1 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 - 5.5 V to
2.7 V - 5.5 V
• Footprint and Functional 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
• Accommodates Standard Mode and Fast Mode
I2C Devices and Multiple Masters
• High-Impedance I2C Pins When Powered-Off
• 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)
2 Applications
• Servers
• Routers (Telecom Switching Equipment)
• Industrial Equipment
• Products with Many I2C Slaves and/or Long PCB
Traces
3 Description
The TCA9517A is a bidirectional buffer with level
shifting capabilities for I2C and SMBus systems. It
provides 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 SMBus 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 up to 400-pF bus
capacitance to be connected in an I2C application.
The TCA9517A has two types of drivers: A-side
drivers and B-side drivers. All inputs and I/Os are
over-voltage tolerant to 5.5 V, even when the device
is unpowered (VCCB and/or VCCA = 0 V).
The TCA9517A offers a higher contention level
threshold, VILC, than the TCA9517, which allows
connections to slaves which have weaker pulldown
ability.
Device Information(1)
PART NUMBER PACKAGE
BODY SIZE (NOM)
TCA9517A
VSSOP (8)
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Simplified Schematic
I2C or SMBus Master
(e.g. Processor)
1
VCCA
3 SDAA
2 SCLA
5 EN
TCA9517A
GND
4
8
VCCB
SDAB 6
SCLB 7
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.

TCA9517A
TCA9517A
SCPS245C – DECEMBER 2012 – REVISED DECEMBER 2018
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Description (continued)......................................... 3
6 Pin Configuration and Functions ......................... 4
7 Specifications......................................................... 4
7.1 Absolute Maximum Ratings ..................................... 4
7.2 ESD Ratings.............................................................. 5
7.3 Recommended Operating Conditions....................... 5
7.4 Thermal Information .................................................. 5
7.5 Electrical Characteristics........................................... 6
7.6 Timing Requirements ................................................ 6
7.7 I2C Interface Switching Characteristics..................... 7
7.8 Typical Characteristics .............................................. 8
8 Parameter Measurement Information .................. 9
9 Detailed Description ............................................ 10
9.1 Overview ................................................................. 10
9.2 Functional Block Diagram ....................................... 10
9.3 Feature Description................................................. 11
9.4 Device Functional Modes........................................ 11
10 Application and Implementation........................ 12
10.1 Application Information.......................................... 12
10.2 Typical Application ............................................... 12
11 Power Supply Recommendations ..................... 15
12 Layout................................................................... 16
12.1 Layout Guidelines ................................................. 16
12.2 Layout Example .................................................... 16
13 Device and Documentation Support ................. 17
13.1 Receiving Notification of Documentation Updates 17
13.2 Community Resource............................................ 17
13.3 Trademarks ........................................................... 17
13.4 Electrostatic Discharge Caution ............................ 17
13.5 Glossary ................................................................ 17
14 Mechanical, Packaging, and Orderable
Information ........................................................... 17
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision B (June 2015) to Revision C
Page
• Changed the appearance of the DGK pin out image ............................................................................................................. 4
• Deleted VCCA < VCCB from the Design Requirements list ..................................................................................................... 12
Changes from Revision A (April 2013) to Revision B
Page
• Added Pin Configuration and Functions section, ESD Ratings table, Feature Description section, Device Functional
Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device
and Documentation Support section, and Mechanical, Packaging, and Orderable Information section .............................. 1
• Removed Ordering Information table. .................................................................................................................................... 3
Changes from Original (December 2012) to Revision A
Page
• Updated the TOP-SIDE MARKING column of the ORDERING INFORMATION TABLE. ..................................................... 3
2 Submit Documentation Feedback
Product Folder Links: TCA9517A
Copyright © 2012–2018, Texas Instruments Incorporated


Features Product Folder Order Now Technical Doc uments Tools & Software Support & Com munity TCA9517A SCPS245C – DECEMBER 2012 – REVISED DECEMBER 2018 TCA9517A Level-Shifting I2C Bus Repeater 1 Fea tures •1 Two-Channel Bidirectional Bu ffer • I2C Bus and SMBus Compatible Operating Supply Voltage Range of 0. 9 V to 5.5 V on A-side • Operating Su pply Voltage Range of 2.7 V to 5.5 V on B-side • Voltage-Level Translation F rom 0.9 V - 5.5 V to 2.7 V - 5.5 V • Footprint and Functional Replacement fo r PCA9515B • Active-High Repeater-Ena ble Input • Open-Drain I2C I/O • 5. 5-V Tolerant I2C and Enable Input Suppo rt Mixed-Mode Signal Operation • Acco mmodates Standard Mode and Fast Mode I2 C Devices and Multiple Masters • High -Impedance I2C Pins When Powered-Off Latch-Up Performance Exceeds 100 mA P er 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) 2 Applications • Servers • Routers (Telecom Switchi.
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