LTC4302

PRODUCTION

Addressable 2-Wire Bus Buffers

Part Models: 8
1ku List Price: Starting From $3.82

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Overview

Bidirectional Buffer for SDA and SCL Lines Increases Fanout
Connect SDA and SCL Lines with 2-Wire Bus Commands
Prevents SDA and SCL Corruption During Live Board Insertion and Removal from Backplane
Compatible with I²C^™ Standard Mode, I²C Fast Mode and SMBus Standards
Rise Time Accelerators on SDA, SCL Lines
1V Precharge on SDA and SCL Lines
32 Unique Addresses from a Single ADDRESS Pin
Two General Purpose Inputs-Outputs (LTC4302-1)
Translates Between 5V and 3.3V Systems (LTC4302-2)
Small 10-Pin MSOP Package

The LTC4302-1/LTC4302-2 addressable I²C bus and SMBus compatible bus buffers allow a peripheral board to be inserted and removed from a live backplane without corruption of the bus. The LTC4302-1/LTC4302-2 maintain electrical isolation between the backplane and peripheral board until their V_CC supply is valid and a master device on the backplane side addresses the LTC4302-1/LTC4302-2 and commands them to connect. The LTC4302-1/LTC4302-2’s ADDRESS pin provides 32 possible addresses set by an external resistive divider between V_CC and GND. The LTC4302-1/LTC4302-2 work with supply voltages ranging from 2.7V to 5.5V. The SDA and SCL inputs and outputs do not load the bus lines when V_CC is low.

Rise time accelerator circuitry allows for heavier capacitive bus loading while still meeting system timing requirements. During insertion, the SDA and SCL lines are precharged to 1V to minimize bus disturbances. Two general purpose input/output pins (GPIOs) on the LTC4302-1 can be configured as inputs, open-drain outputs or push-pull outputs. The LTC4302-2 option replaces one GPIO pin with a second supply voltage pin V_CC2, providing level shifting between systems with different supply voltages. The LTC4302-1/LTC4302-2 are available in a 10-pin MSOP package.

Applications

Live Board Insertion
5V/3.3V Level Translator
Servers
Capacitance Buffer/Bus Extender
Nested Addressing

Part Models: 8
1ku List Price: Starting From $3.82

Documentation

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
LTC4302CMS-1#PBF	10-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4302CMS-1#TRPBF	10-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4302CMS-2#PBF	10-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4302CMS-2#TRPBF	10-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4302IMS-1#PBF	10-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4302IMS-1#TRPBF	10-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4302IMS-2#PBF	10-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4302IMS-2#TRPBF	10-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Feb 4, 2020 - 20_0130 Laser Top Mark Conversion for 10-Lead MSOP Packages Assembled in ADPG and UTAC
		PCN20_0130_Form Material_Report
LTC4302CMS-1#PBF	PRODUCTION
LTC4302CMS-1#TRPBF	PRODUCTION
LTC4302CMS-2#PBF	PRODUCTION
LTC4302CMS-2#TRPBF	PRODUCTION
LTC4302IMS-1#PBF	PRODUCTION
LTC4302IMS-1#TRPBF	PRODUCTION
LTC4302IMS-2#PBF	PRODUCTION
LTC4302IMS-2#TRPBF	PRODUCTION