1. Description
The Lontium LT1258 is a quad 2:2 cross-point switch or splitter with signal conditioning suitable for high-speed bus applications with data rates up to 12.5 Gbps. The continuous time linear equalizer (CTLE) of the receiver provides adjustable boost to compensate up to 25 dB insertion-loss at 6.25 GHz. The transmitter features a programmable amplitude voltage levels to be selectable up to 1200 mVpp and de-emphasis up to 8 dB.
In order to save power consumption, the LT1258 can work well from 1.8V to 2.5V power supply in external LDO mode.
The LT1258 can be configured to support PCIe, CAUI-10, and SAS/SATA, 10G-KR, CPRI or other signaling protocols.
The LT1258 is fabricated in advanced CMOS process and implemented in 10mm x 5.5mm QFN54 package.
2. Features
• Support 1Gbps to 12.5Gbps Data Rate
• Input signal detect and output sink detect support
• 2×2 Analog cross-point Switch
• Data lane polarity swappable
• Up to 4 forward and 4 backward lanes support
• Programmable de-emphasis up to 8dB
• Up to 1.2V output Swing
• Programmable Through Pin Selection, EEPROM or I2C/SMBus Interface
• Selectable 2.5-V or 3.3-V supply voltage
• Equalization performance
PRBS31 25 dB@12.5Gbps
PRBS31 26 dB@11.5Gbps
PRBS31 27 dB@10.3125Gbps
• Support up to 400KHz I2C/SMBus slave
3. Application
• 10G-KR
• CAUI-10
• SAS/SATA
• CPRI
• PCle
• SGMII
1. Description
Lontium LT1258 是一款具有信号调理功能的四通道 2:2 交叉点开关或分路器,适用于数据速率高达 12.5 Gbps 的高速总线应用。接收器的连续时间线性均衡器(CTLE)提供可调升压,以补偿25.6 GHz时高达25 dB的插入损耗。该变送器具有可编程幅度电压电平,可选择高达 1200 mVpp 和去加重高达 8 dB。
为了节省功耗,LT1258 能够在外部 LDO 模式下采用 1.8V 至 2.5V 电源时很好地工作。
LT1258 可配置为支持 PCIe、CAUI-10 和 SAS/SATA、10G-KR、CPRI 或其他信号协议。
LT1258 采用先进的 CMOS 工艺制造,并采用 10mm x 5.5mm QFN54 封装。
2. 特性
• 支持 1Gbps 至 12.5Gbps 数据速率
• 输入信号检测和输出灌电流检测支持• 2×2 模拟交叉点开关
• 数据通道极性可交换• 多达 4 个正向和 4 个后向通道支持
• 高达 8dB
的可编程去加重• 高达 1.2V 输出摆幅
• 可通过引脚选择、EEPROM 或 I2C/SMBus 接口
进行编程• 可选 2.5V 或 3.3V 电源电压
• 均衡性能
PRBS31 25 dB@12.5Gbps PRBS31 26 dB@11.5Gbps
PRBS31 27 dB@10.3125Gbps
• 支持高达 400KHz I2C/SMBus 从机
3. 应用
• 10G-KR • CAUI-10
• SAS/SATA
• CPRI• PCle
• SGMII