LMH2191TMX

The LMH2191TMX from Texas Instruments is a dual-channel clock tree driver engineered to supply digital system clocks to peripherals in mobile handsets and similar applications. It addresses clocking challenges such as limited drive capability for fanout or extended traces, while also protecting the master clock from varying loads and frequency pulling effects. This device offers isolation from noisy modules and crosstalk.

With a maximum clock frequency of 52 MHz, the LMH2191TMX provides a 1.8V square wave clock output. It features independent clock request pins for each output, allowing peripherals to control the clock. The integrated 1.8V low-dropout regulator can supply up to 10 mA external load current, suitable for powering TCXOs or other clock sources. Its low output-noise voltage and very low phase noise make it suitable for driving sensitive modules like Wireless LAN and Bluetooth.

The clock buffer is housed in a compact 8-bump DSBGA package measuring 1.61 mm x 1.063 mm. It operates within a temperature range of -40°C to 85°C. The device supports a V BAT range of 2.5V to 5.5V and includes EMI filtering and ultra-low standby current.