- Part Models
- 4
- 1ku List Price
- Starting From $2.34
LTC4300A-1
PRODUCTIONHot Swappable 2-Wire Bus Buffers
Viewing:
Part Details
- 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 Lines from Output
- Compatible with I2C, I2C Fast Mode and SMBus Standards (Up to 400kHz Operation)
- Small MSOP 8-Pin Package
- Low ICC Chip Disable: <1µA (LTC4300A-1)
- READY Open Drain Output (LTC4300A-1)
- 1V Precharge on all SDA and SCL Lines
- Supports Clock Stretching, Arbitration and Synchronization
- 5V to 3.3V Level Translation (LTC4300A-2)
- High Impedance SDA, SCL Pins for VCC = 0V
The LTC4300A series hot swappable 2-wire bus buffers allow I/O card insertion into a live backplane without corruption of the data and clock busses. When the connection is made, the LTC4300A-1/LTC4300A-2 provide bidirectional buffering, keeping the backplane and card capacitances isolated. Rise-time accelerator circuitry* allows the use of weaker DC pull-up currents while still meeting rise-time requirements. During insertion, the SDA and SCL lines are precharged to 1V to minimize bus disturbances.
The LTC4300A-1 incorporates a CMOS threshold digital ENABLE input pin, which forces the part into a low current mode when driven to ground and sets normal operation when driven to VCC. It also includes an open drain READY output pin, which indicates that the backplane and card sides are connected together. The LTC4300A-2 replaces the ENABLE pin with a dedicated supply voltage pin, VCC2, for the card side, providing level shifting between 3.3V and 5V systems. Both the backplane and card may be powered with supply voltages ranging from 2.7V to 5.5V, with no contraints on which supply voltage is higher. The LTC4300A-2 also replaces the READY pin with a digital CMOS input pin, ACC, which enables and disables the rise-time accelerator currents.
The LTC4300A is available in a small 8-pin MSOP package.
Applications
- Hot Board Insertion
- Servers
- Capacitance Buffer/Bus Extender
- Desktop Computer
Documentation
Data Sheet 1
Reliability Data 1
Design Note 1
Technical Articles 2
Video 4
Product Selector Card 1
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 |
|---|---|---|---|
| LTC4300A-1CMS8#PBF | 8-Lead MSOP | ||
| LTC4300A-1CMS8#TRPBF | 8-Lead MSOP | ||
| LTC4300A-1IMS8#PBF | 8-Lead MSOP | ||
| LTC4300A-1IMS8#TRPBF | 8-Lead MSOP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Feb 3, 2020 - 20_0128 Laser Top Mark for 8 Lead MSOP Packages Assembled in ADPG and UTAC |
||
| LTC4300A-1CMS8#PBF | PRODUCTION | |
| LTC4300A-1CMS8#TRPBF | PRODUCTION | |
| LTC4300A-1IMS8#PBF | PRODUCTION | |
| LTC4300A-1IMS8#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Hardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Interface Transceivers & Isolators 1 | ||
| LTM2883 | PRODUCTION | SPI/Digital or I2C μModule Isolator with Adjustable ±12.5V and 5V Regulated Power |
Tools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LTC4300A-1
IBIS Model 1
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
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