LTC4304
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LTC4304

Hot Swappable 2-Wire Bus Buffer with Stuck Bus Recovery

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IBIS Model LTC4304 IBIS Model Download 13.00KB
Part Models 8
1ku List Price Starting From $2.66
Features
  • Automatic Disconnect of SDA/SCL Lines when Bus is Stuck Low for ≥30ms
  • Fault Flag for Stuck Bus
  • Recovers Stuck Busses with Automatic Clocking*
  • Bidirectional Buffer* for SDA and SCL Lines Increases Fanout
  • Prevents SDA and SCL Corruption During Live Board Insertion and Removal from Backplane
  • Allows Bus Pullup Voltages Above and Below VCC
  • ±15kV Human Body Model ESD Protection
  • Isolates Input SDA and SCL Lines from Output
  • Compatible with I2C™, I2C Fast-Mode and SMBus Standards (Up to 400kHz Operation)
  • READY Open Drain Output
  • 1V Precharge on All SDA and SCL Lines
  • High Impedance SDA, SCL Pins for VCC = 0V
  • ENABLE Gates Connection from Input to Output
  • MSOP 10-Pin and DFN (3mm × 3mm) Packages
Additional Details
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The LTC4304 hot swappable 2-wire bus buffer allows I/O card insertion into a live backplane without corruption of the data and clock busses. When a connection is made, the LTC4304 provides bidirectional buffering, keeping the backplane and card capacitances isolated. If SDAOUT or SCLOUT is low for ≥30ms (typ), the LTC4304 automatically breaks the data and clock bus connection and FAULT will pull low. At this time the LTC4304 automatically generates up to 16 clock pulses on SCLOUT in an attempt to free the bus. A connection will be enabled automatically when the bus becomes free. A logic low on the ACC input enables the LTC4304's rise-time accelerators. A logic high on ACC disables the rise-time accelerators, which allows SDA and SCL bus pull-up voltages below VCC.

During insertion, the SDA and SCL lines are precharged to 1V to minimize bus disturbances. When driven high, ENABLE allows the LTC4304 to connect after a stop bit or bus idle occurs. Driving ENABLE low breaks the connection between SDAIN and SDAOUT, SCLIN and SCLOUT. READY is an open drain output that indicates when the backplane and card sides are connected together.

Applications

  • Hot Board Insertion
  • Servers
  • Capacitance Buffer/Bus Extender
  • RAID Systems
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IBIS Model LTC4304 IBIS Model Download 13.00KB
Part Models 8
1ku List Price Starting From $2.66
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LTC4304

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UPDATED 11/21/2007
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LTC4304: Hot Swappable 2-Wire Bus Buffer with Stuck Bus Recovery Data Sheet

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Reliability Data

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UPDATED 03/22/2018
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R410 Reliability Data redirect icon

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Technical Articles

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UPDATED 03/01/2006
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I2C Bus Buffer Resolves Stuck Buses, Eliminates Heavy Load Limitations and Provides Level Translation redirect icon

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UPDATED 03/01/2006
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I2Cバス・バッファによるスタック・バスの解決、容量性負荷への対処とレベル変換も可能に redirect icon

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Documentation

Product Selection Guide 1

Digital Isolation and Interface Technology Selection Guide

Product Selector Card 2

I2C Quick Guide
Serial Bus Buffers, Extenders, and Accelerators

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2

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2020-10-28

01:00

Protect your Innovations: from High Precision to High Power

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Video

2017-09-18

11:21

I2C/SMBus Buffers - Video Product Brief

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ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC4304CDD#PBF 10-Lead DFN (3mm x 3mm w/ EP) external-link
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LTC4304CDD#TRPBF 10-Lead DFN (3mm x 3mm w/ EP) external-link
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LTC4304CMS#PBF 10-Lead MSOP external-link
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LTC4304CMS#TRPBF 10-Lead MSOP external-link
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LTC4304IDD#PBF 10-Lead DFN (3mm x 3mm w/ EP) external-link
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LTC4304IDD#TRPBF 10-Lead DFN (3mm x 3mm w/ EP) external-link
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LTC4304IMS#PBF 10-Lead MSOP external-link
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Jun 5, 2024

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Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)

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Feb 4, 2020

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Laser Top Mark Conversion for 10-Lead MSOP Packages Assembled in ADPG and UTAC

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Jun 5, 2024

- 24_0003

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Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)

LTC4304CMS#PBF

PRODUCTION

LTC4304CMS#TRPBF

PRODUCTION

LTC4304IMS#PBF

PRODUCTION

LTC4304IMS#TRPBF

PRODUCTION

pdf

PCN24_0003_Form

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xls

Material_Report

Download

pdf

Qualification Results Summary

external-icon

xlsm

Delta Qualification Matrix

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Feb 4, 2020

- 20_0130

arrow down

Laser Top Mark Conversion for 10-Lead MSOP Packages Assembled in ADPG and UTAC

LTC4304CMS#PBF

PRODUCTION

LTC4304CMS#TRPBF

PRODUCTION

LTC4304IMS#PBF

PRODUCTION

LTC4304IMS#TRPBF

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PCN20_0130_Form

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Material_Report

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