TCA9511A Buffer Datasheet

TCA9511A Datasheet, PDF, Equivalent


Part Number

TCA9511A

Description

Hot Swappable I2C Bus and SMBus Buffer

Manufacture

etcTI

Total Page 23 Pages
Datasheet
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TCA9511A
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TCA9511A
SCPS272A – OCTOBER 2019 – REVISED DECEMBER 2019
TCA9511A Hot Swappable I2C Bus and SMBus Buffer
1 Features
1 Supports bidirectional data transfer of I2C bus
signals
• Operating power-supply voltage range of 2.3 V to
5.5 V
• TA ambient air temperature range of
-40 °C to 125 °C
• 1-V Precharge on all SDA and SCL lines prevents
corruption during live insertion
• Accommodates standard mode and fast mode I2C
devices
• Supports clock stretching, arbitration and
synchronization
• Powered-off high-impedance I2C pins
2 Applications
Servers
Enterprise Switching
Telecom switching equipment
Base stations
Industrial automation equipment
3 Description
The TCA9511A is a hot-swappable I2C bus buffer
that supports I/O card insertion into a live backplane
without corruption of the data and clock buses.
Control circuitry prevents the backplane-side I2C lines
(in) from being connected to the card-side I2C lines
(out) until a stop command or bus idle condition
occurs on the backplane without bus contention on
the card. When the connection is made, this device
provides bidirectional buffering, keeping the
backplane and card capacitances separated. During
insertion, the SDA and SCL lines are pre-charged to
1 V to minimize the current required to charge the
parasitic capacitance of the device.
When the I2C bus is idle, the TCA9511A can be put
into shutdown mode by setting the EN pin low,
reducing power consumption. When EN is pulled
high, the TCA9511A resumes normal operation. It
also includes an open drain READY output pin, which
indicates that the backplane and card sides are
connected together. When READY is high, the
SDAIN and SCLIN are connected to SDAOUT and
SCLOUT. When the two sides are disconnected,
READY is low.
Device information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TCA9511A
VSSOP (8)
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic
SCLIN
8
VCC
32
SCLOUT
SDAIN
6
7 SDAOUT
1
ENABLE
5
READY
GND
4
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.

TCA9511A
TCA9511A
SCPS272A – OCTOBER 2019 – REVISED DECEMBER 2019
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Device Comparison Table..................................... 3
6 Pin Configuration and Functions ......................... 3
7 Specifications......................................................... 4
7.1 Absolute Maximum Ratings ...................................... 4
7.2 ESD Ratings.............................................................. 4
7.3 Recommended Operating Conditions....................... 4
7.4 Thermal Information .................................................. 4
7.5 Electrical Characteristics........................................... 5
7.6 Timing Requirements ................................................ 6
7.7 Switching Characteristics .......................................... 6
7.8 Typical Characteristics .............................................. 7
8 Parameter Measurement Information .................. 8
9 Detailed Description .............................................. 9
9.1 Overview ................................................................... 9
9.2 Functional block diagram .......................................... 9
9.3 Feature Description................................................. 10
9.4 Device Functional Modes........................................ 10
10 Application and Implementation........................ 12
10.1 Application Information.......................................... 12
10.2 Typical Application ............................................... 12
10.3 Typical Application on a Backplane ...................... 15
11 Power Supply Recommendations ..................... 16
11.1 Power supply best practices ................................. 16
11.2 Power-on reset requirements................................ 16
12 Layout................................................................... 17
12.1 Layout Guidelines ................................................. 17
12.2 Layout Example .................................................... 18
13 Device and Documentation Support ................. 19
13.1 Receiving Notification of Documentation Updates 19
13.2 Support Resources ............................................... 19
13.3 Trademarks ........................................................... 19
13.4 Electrostatic Discharge Caution ............................ 19
13.5 Glossary ................................................................ 19
14 Mechanical, Packaging, and Orderable
Information ........................................................... 19
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Original (October 2019) to Revision A
Page
• Changed the device status From: Advanced Information To: Production data ..................................................................... 1
2 Submit Documentation Feedback
Product Folder Links: TCA9511A
Copyright © 2019, Texas Instruments Incorporated


Features Product Folder Order Now Technical Doc uments Tools & Software Support & Com munity TCA9511A SCPS272A – OCTOBER 2 019 – REVISED DECEMBER 2019 TCA9511A Hot Swappable I2C Bus and SMBus Buffer 1 Features •1 Supports bidirectional data transfer of I2C bus signals • O perating power-supply voltage range of 2.3 V to 5.5 V • TA ambient air tempe rature range of -40 °C to 125 °C • 1-V Precharge on all SDA and SCL lines prevents corruption during live inserti on • Accommodates standard mode and f ast mode I2C devices • Supports clock stretching, arbitration and synchroniz ation • Powered-off high-impedance I2 C pins 2 Applications • Servers • E nterprise Switching • Telecom switchi ng equipment • Base stations • Indu strial automation equipment 3 Descript ion The TCA9511A is a hot-swappable I2C bus buffer that supports I/O card inse rtion into a live backplane without cor ruption of the data and clock buses. Co ntrol circuitry prevents the backplane-side I2C lines (in) from being connected to the card-s.
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