For Information Equipment MN83876A Liquid Crystal Display Panel Source Driver Overview The MN83876A converts digital display data from a personal computer or engineering workstation into analog signal voltages for driving thin-film transistor color LCD panels. Features Driver capable of displaying 260,000 colors with built-in D/A converter accepting 6-bit digital inputs Choice of 300 or 309 drive outputs Seven-segment gamma correction Data settings of 01 and 3E in addition to 00, 07, 17, 27, 37, and 3F for output voltage inflection points Drive system that does not require precharging Supports serial cascade connections. Automatic clock suspension after reading in specified data volume Choice of shift register shift directions Support for data inversion control at the clock cycle level. Digital portions operate at low voltages (2.5 to 3.6 V) Maximum operating frequency of 55 MHz (2.5 to 3.6 V) Choice of 3.3 or 5 V for analog portions Applications Personal computers and workstations (available for SVGA and XGA) MN83876A For Information Equipment Block Diagram Y308 Y1 Y2 Y3 AVDD (2 pins) AVSS (2 pins) Y309 Output circuit 8 VREF0 to 7 VOP (2 pins) VSEL Digital-to-analog converter 6 6 6 6 A 6 300/309 × 6 bits × 2 line latch 6 6 D00 to D05 D10 to D15 D20 to D25 6 6 6 6 6 6 6 6 Latch 6 6 INV 1 2 103 PLSR 100/103-bit shift register PRSL DVDD DVSS TEST RL FY MODE For Information Equipment MN83876A Application Circuit Example Tantalumelectrolytic capacitor 10µF – + Ceramic + 0.1µF capacitor Operational – amplifier 0V VOP (+AVDD /2) Tantalumelectrolytic Ceramic capacitor capacitor AVDD 10µF 0.1µF + – Note: Add capacitors, as appropriate, to stabilize the power supply. 2 8 VREF6 VREF7 Gamma correction resistors VREF5 Total: approximately 1 kΩ VREF3 Source drivers (8 or 10 MN83876As) Gamma correction potentials VREF4 VREF2 VREF0 18 3 VREF1 0V Display controller H, V, CLK D0 (5:0) D1 (5:0) D2 (5:0) Functions: Generating LCD synchronization signals and controlling conversion to AC signals (data inversion) LCD panel (800 × 600, or 1024 × 768) Gate driver 10kΩ 10kΩ AVDD Control signal + – Ceramic capacitor 0.1µF Display data Tantalumelectrolytic capacitor 10µF Control signal