LC75847T

LC75847T CMOS LSI 1/3, 1/4 Duty General-Purpose LCD Driver www.onsemi.com Overview The LC75847T is 1/3 duty and 1/4 duty general-purpose LCD driver that can be used for frequency display in electronic tuners under the control of a microcontroller. The LC75847T can drive an LCD with up to 420 segments directly. The LC75847T can also control up to 8 general-purpose output ports. Features  Switching between 1/3 duty and 1/4 duty drive techniques under serial data control. TQFP120 14x14  Switching between 1/2 bias and 1/3 bias drive techniques under serial data control.  Up to 318 segments for 1/3 duty drive and 420 segments for 1/4 duty drive can be displayed.  Serial data input supports CCB format communication with the system controller.  Serial data control of the power-saving mode based backup function and all the segments forced off function.  Serial data control of switching between the segment output port and the general-purpose output port functions.  Serial data control of frame frequency for common and segment output waveforms.  High generality, since display data is displayed directly without decoder intervention.  Built-in display contrast adjustment circuit  Independent VLCD for the LCD driver block  The INH pin can force the display to the off state.  RC oscillator circuit Specifications Absolute Maximum Ratings at Ta = 25C, VSS = 0V Parameter Symbol Conditions Maximum supply voltage Input voltage Output voltage Output current All...