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TCA4311DG4 Fiches technique(PDF) 2 Page - Texas Instruments

No de pièce TCA4311DG4
Description  HOT SWAPPABLE 2-WIRE BUS BUFFERS
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
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TCA4311DG4 Fiches technique(HTML) 2 Page - Texas Instruments

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TCA4311
SCPS173 – DECEMBER 2008........................................................................................................................................................................................... www.ti.com
ORDERING INFORMATION
TA
PACKAGE(1)(2)
ORDERABLE PART NUMBER
TOP-SIDE MARKING
SOIC – D
Tape and reel
TCA4311DR
PR311
–40°C to 85°C
MSOP – DGK
Tape and reel
TCA4311DGKR
3JS
(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.
TERMINAL FUNCTIONS
SOIC (D) OR MSOP (DGK)
PACKAGE
DESCRIPTION
PIN NUMBER
NAME
Active-high chip enable pin. If EN is low, the TCA4311 is in a low current (<1
µA) mode. It also disables
the rise-time accelerators, disables the bus precharge circuitry, drives READY low, isolates SDAIN
1
EN
from SDAOUT and isolates SCLIN from SCLOUT. EN should be high (at VCC) for normal operation.
Connect EN to VCC if this feature is not being used.
2
SCLOUT
Serial clock output. Connect this pin to the SCL bus on the card.
3
SCLIN
Serial clock input. Connect this pin to the SCL bus on the backplane.
4
GND
Supply ground
Connection flag/rise-time accelerator control. READY is low when either EN is low or the start-up
5
READY
sequence described in the operation section has not been completed. READY goes high when EN is
high and start-up is complete. Connect a 10-k
Ω resistor from this pin to VCC to provide the pull up.
6
SDAIN
Serial data input. Connect this pin to the SDA bus on the backplane.
7
SDAOUT
Serial data output. Connect this pin to the SDA bus on the card.
Supply power. Main input power supply from backplane. This is the supply voltage for the devices on
8
VCC
the backplane I2C busses. Connect pullup resistors from SDAIN and SCLIN (and also from SDAOUT
and SCLOUT) to this pin. Place a bypass capacitor of at least 0.01
µF close to this pin for best results.
2
Submit Documentation Feedback
Copyright © 2008, Texas Instruments Incorporated
Product Folder Link(s): TCA4311


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