DESCRIPTION

· The LMH2190 is a quad-channel configurable clock tree driver designed for mobile handsets and other applications.

· It addresses clocking issues such as limited drive capability, protection from varying loads, isolation from noisy modules, and crosstalk isolation.

· It can be clocked up to 27MHz and features an independent clock request pin for each clock output.

· Includes an integrated LDO providing an ultra-low noise voltage supply with a 10mA external load current.

· The I2C serial interface allows overriding the default configuration to optimize the device for specific applications.

FEATURES

· Supports both square or sine wave input.

· Provides 1.8V square wave clock outputs.

· Features skewed clock outputs and independent clock request frequency.

· High isolation of supply noise to clock input and high output to output isolation.

· Output drive up to 50pF with EMI controlled output edges and EMI filtering.

· Integrated 1.8V low-dropout regulator with low output noise voltage.

· Configurable via I2C up to 400kHz (Fast Mode) with ultra-low standby current.

· Operates within a VBAT range of 2.5V to 5.5V.

APPLICATIONS

· Mobile handsets.

· PDAs.

· Portable equipment.