LTC4304
量产具阻塞总线恢复功能的可热插拔型二线式总线缓冲器
- 产品模型
- 8
产品详情
- 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 I2CTM, 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
The LTC®4304 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.
*Patent Pending
Applications
- Hot Board Insertion
- Servers
- Capacitance Buffer/Bus Extender
- RAID Systems
参考资料
数据手册 1
可靠性数据 1
技术文章 1
视频 2
产品选型指南 1
产品选型卡 2
新闻 1
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| 产品型号 | 引脚/封装图-中文版 | 文档 | CAD 符号，脚注和 3D模型 |
|---|---|---|---|
| LTC4304CDD#PBF | 10-Lead DFN (3mm x 3mm w/ EP) | ||
| LTC4304CDD#TRPBF | 10-Lead DFN (3mm x 3mm w/ EP) | ||
| LTC4304CMS#PBF | 10-Lead MSOP | ||
| LTC4304CMS#TRPBF | 10-Lead MSOP | ||
| LTC4304IDD#PBF | 10-Lead DFN (3mm x 3mm w/ EP) | ||
| LTC4304IDD#TRPBF | 10-Lead DFN (3mm x 3mm w/ EP) | ||
| LTC4304IMS#PBF | 10-Lead MSOP | ||
| LTC4304IMS#TRPBF | 10-Lead MSOP |
| 产品型号 | 产品生命周期 | PCN |
|---|---|---|
| 未找到匹配项目 | ||
|
6月 5, 2024 - 24_0003 Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2) |
||
| LTC4304CMS#PBF | 量产 | |
| LTC4304CMS#TRPBF | 量产 | |
| LTC4304IMS#PBF | 量产 | |
| LTC4304IMS#TRPBF | 量产 | |
|
2月 4, 2020 - 20_0130 Laser Top Mark Conversion for 10-Lead MSOP Packages Assembled in ADPG and UTAC |
||
| LTC4304CMS#PBF | 量产 | |
| LTC4304CMS#TRPBF | 量产 | |
| LTC4304IMS#PBF | 量产 | |
| LTC4304IMS#TRPBF | 量产 | |
这是最新版本的数据手册
硬件生态系统
| 部分模型 | 产品周期 | 描述 |
|---|---|---|
| I²C 隔离器 1 | ||
| LTM2883 | 量产 | 具可调 ±12.5V 和 5V 稳定电源的 SPI / 数字或 I2C μModule 隔离器 |
工具及仿真模型
IBIS 模型 1
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