-
LTC4301: Supply Independent Hot Swappable 2-Wire Bus Buffer Data Sheet8/29/2007PDF223K
Overview
Features and Benefits
- Allows Bus Pull-Up Voltages Above or Below VCC
- Bidirectional Buffer* for SDA and SCL Lines Increases Fanout
- Prevents SDA and SCL Corruption During Live Board Insertion and Removal from Backplane
- Isolates Input SDA and SCL Line from Output
- 10kV Human Body Model ESD Protection
- 1V Precharge On All SDA and SCL Lines
- Supports Clock Stretching, Arbitration and Synchronization
- High Impedance SDA, SCL Pins for VCC = 0V
- CS Gates Connection from Input to Output
- Compatible with I²C™, I²C Fast Mode and SMBus Standards (Up to 400kHz Operation)
- Small 8-Pin MSOP and DFN (3mm × 3mm) Packages
Product Details
The LTC4301 supply independent, hot swappable, 2-wire bus buffer allows I/O card insertion into a live backplane without corruption of the data and clock busses. In addition, the LTC4301 allows the VCC, SDAIN and SCLIN pullup voltage and the SDAOUT and SCLOUT pull-up voltage to be independent from each other. Control circuitry prevents the backplane from being connected to the card until a stop bit or a bus idle is present. When the connection is made, the LTC4301 provides bidirectional buffering, keeping the backplane and card capacitances isolated.
During insertion, the SDA and SCL lines are precharged to 1V to minimize bus disturbances. When driven low, the CS input pin allows the part to connect after a stop bit or bus idle occurs. Driving CS high breaks the connection between SCLIN and SCLOUT and between SDAIN and SDAOUT. The READY output pin indicates that the backplane and card sides are connected together.
The LTC4301 is offered in 8-pin DFN (3mm × 3mm) and MSOP packages.
Applications
- Hot Board Insertion
- Servers
- Capacitance Buffer/Bus Extender
- Desktop Computers
- CompactPCI™ and ATCA Systems
Product Categories
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Documentation & Resources
-
R413 Reliability Data3/26/2018PDF26 K
-
Serial Bus Buffers, Extenders, and Accelerators7/13/2017PDF823 K
-
I2C Quick Guide7/13/2017PDF1M
-
Digital Isolation and Interface Technology Selection Guide2/7/2020PDF4 M
Tools & Simulations
IBIS Models
IBS
LTC4301 IBIS Model
17.00K
Design Resources
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.
PCN-PDN Information
Support & Discussions
LTC4301 Discussions
Sample & Buy
Ordering FAQs
See our Ordering FAQs for answers to questions about online orders, payment options and more.
Buy Now Pricing
(**) Displayed Buy Now Price and Price Range is based on small quantity orders.
List Pricing
(*)The 1Ku list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
Sampling
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.