The LMH2191 is a dual-channel clock tree driver that supplies a digital system clock to peripherals in mobile handsets or other applications. It provides a solution to clocking issues such as limited drive capability for fanout or longer traces. It also provides protection of the master clock from varying loads and frequency pulling effects, isolation from noisy modules, and crosstalk isolation. It has very low phase noise which enables it to drive sensitive modules such as Wireless LAN and Bluetooth.

The LMH2191 can be clocked up to 52 MHz and has an independent clock request pin for each clock output which allows the peripheral to control the clock. It features an integrated LDO which provides an ultra low-noise voltage supply with 10 mA external load current which can be used to supply the TCXO or other clock source. The LMH2191 dual clock distributor is offered in a tiny 1.61 mm x 1.063 mm 8-bump DSBGA package. Its small size and low supply current make it ideal for portable applications.

• One Input Clock, Two Output Clocks
• 1.8V Square Wave Clock Outputs
• Inverted Clock Outputs
• Independent Clock Requests
• High Isolation of Supply Noise to Clock Input
• High Output-to-Output Isolation
• Integrated 1.8V Low-Dropout Regulator
  • Low Output-Noise Voltage
  • 10 mA Load Current
• EMI Filtering
• Ultra Low Standby Current
• VBAT Range = 2.5V to 5.5V
• 8-Bump DSBGA Package

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• Function
• Single-ended
• Additive RMS jitter (Typ) (fs)
• 95
• Output frequency (Max) (MHz)
• 52
• Number of outputs
• 2
• Output supply voltage (V)
• 1.8
• Core supply voltage (V)
• 2.5, 3.3, 5
• Output skew (ps)
• 3.1
• Features
• Dual 1:2 fanout
• Operating temperature range (C)
• -40 to 85
• Rating
• Catalog
• Output type
• SQUARE
• Input type
• SINE, SQUARE

LMH2191的完整型号有：LMH2191TME/NOPB、LMH2191TMX/NOPB，以下是这些产品的关键参数及官网采购报价：

LMH2191TME/NOPB，工作温度：-40 to 85，封装：DSBGA (YFX)-8，包装数量MPQ：250个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SNAGCU，TI官网LMH2191TME/NOPB的批量USD价格：1.178（1000+）

LMH2191TMX/NOPB，工作温度：-40 to 85，封装：DSBGA (YFX)-8，包装数量MPQ：3000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SNAGCU，TI官网LMH2191TMX/NOPB的批量USD价格：1.021（1000+）

LMH2191TMEVAL — 双通道 52 MHz 时钟树驱动器

The LMH2191 is a dual-channel clock tree driver that supplies a digital system clock to peripherals in mobile handsets or other applications. It provides a solution to clocking issues such as limited drive capability for fanout or longer traces. It also provides protection of the master clock from (...)

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