The LMH2180 is a high speed dual clock buffer designed for portable communications and applications requiring multiple accurate multi-clock systems. The LMH2180 integrates two 75 MHz low noise buffers with independent shutdown pins into a small package. The LMH2180 ensures superb system operation between the baseband and the oscillator signal path by eliminating crosstalk between the multiple clock signals.

Unique technology and design provides the LMH2180 with the ability to accurately drive both large capacitive and resistive loads. Low supply current combined with shutdown pins for each channel means the LMH2180 is ideal for battery powered applications. This part does not use an internal ground reference, thus providing additional system flexibility.

The flexible buffers provide system designers the capacity to manage complex clock signals in the latest wireless applications. Each buffer delivers 106 V/μs internal slew rate with independent shutdown and duty cycle precision. Each input is internally biased to 1V, removing the need for external resistors. Both channels have rail-to-rail inputs and outputs, a gain of one, and are AC coupled with the use of one capacitor.

Replacing a discrete buffer solution with the LMH2180 provides many benefits: simplified board layout, minimized parasitic components, simplified BOM, design durability across multiple applications, simplification of clock paths, and the ability to reduce the number of clock signal generators in the system. The LMH2180 is produced in the tiny packages minimizing the required PCB space.

• (Typical Values are: VSUPPLY = 2.7V and CL = 10 pF, unless Otherwise Specified.)
• Small Signal Bandwidth 78 MHz
• Supply Voltage Range 2.4V to 5V
• Phase Noise (VIN = 1 VPP, fC = 38.4 MHz, Δf = 1 kHz) ?123 dBc/Hz
• Slew Rate 106 V/μs
• Total Supply Current 2.3 mA
• Shutdown Current 30 μA
• Rail-to-Rail Input and Output
• Individual Buffer Enable Pins
• Rapid Ton Technology
• Crosstalk Rejection Circuitry
• Packages:
  • 8-Pin WSON, Solder Bump and no Pullback
  • 8-Bump DSBGA
• Temperature Range ?40°C to 85°C

All trademarks are the property of their respective owners.

• Function
• Single-ended
• Output frequency (Max) (MHz)
• 78
• Number of outputs
• 2
• Output supply voltage (V)
• 2.5, 3.3, 5
• Core supply voltage (V)
• 2.5, 3.3, 5
• Features
• Dual 1:1 fanout
• Operating temperature range (C)
• -40 to 85
• Rating
• Catalog
• Output type
• Rail-to-rail
• Input type
• Rail-to-rail

LMH2180的完整型号有：LMH2180SD/NOPB、LMH2180SDE/NOPB、LMH2180TM/NOPB、LMH2180TMX/NOPB，以下是这些产品的关键参数及官网采购报价：

LMH2180SD/NOPB，工作温度：-40 to 85，封装：WSON (NGQ)-8，包装数量MPQ：1000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LMH2180SD/NOPB的批量USD价格：1.056（1000+）

LMH2180SDE/NOPB，工作温度：-40 to 85，封装：WSON (NGQ)-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：SN，TI官网LMH2180SDE/NOPB的批量USD价格：1.056（1000+）

LMH2180TM/NOPB，工作温度：PropertyValue，封装：DSBGA (YFQ)-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LMH2180TM/NOPB的批量USD价格：1.232（1000+）

LMH2180TMX/NOPB，工作温度：PropertyValue，封装：DSBGA (YFQ)-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LMH2180TMX/NOPB的批量USD价格：1.056（1000+）

LMH2180SDEVAL — 用于 LMH2180 75 MHz 双路时钟缓冲器的评估板

This evaluation board is designed to aid in the characterization of National Semiconductors LMH2180 75MHz Dual Clock Buffer. This board simplifies the connection and ease of use of any oscillating input device. Use this evaluation board as a guide for high frequency layout and as a tool to aid in (...)

LMH2180TMEVAL — 采用微型 SMD 封装的 LMH2180 评估板

This evaluation board is designed to aid in the characterization of National Semiconductor's LMH2180 75 MHz Dual Clock Buffer in micro SMD package. This board simplifies the connection and ease of use of any oscillating input device. Use this evaluation board as a guide for high frequency layout (...)

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