LH1687

LH1687 LH1687 DESCRIPTION The LH1687 is a 240-output TFT-LCD source driver IC used in such products as TV sets. The LH1687 samples and holds three video signals of R, G and B by sample and hold circuits synchronized with the CK, and simultaneously outputs the LCD drive voltage from all output pins. 240-output TFT-LCD Source Driver IC PIN CONNECTIONS 264-PIN TCP TOP VIEW 1 OS1 FEATURES Number of LCD drive outputs : 240 Output circuit form : Push pull output Power save function : By setting the LCD drive output in a high-impedance condition, the current source of the LCD drive output circuit is cut off, which makes low power operation possible Sampling timing : Normal sampling operation and 3-point simultaneous sampling operation can be selected Video signal setting : Available for stripe pixel array panels and delta pixel array panels using mode setting circuit Sampling clock frequency : 25 MHz (MAX.) Cascade connection Sampling sequence : Output shift direction can be selected OS1/OS240 or OS240/OS1 Output amplitude voltage : 4.8 Vp-p (at 5.0 V supply voltage) Supply voltages – VCCL (for logic system) : +3.0 to +5.5 V – VCCA (for LCD drive system) : +3.0 to +5.5 V Operating temperature : –30 to + 85 ˚C Package : 264-pin TCP (Tape Carrier Package) VCCA VCCL GNDA GNDL TST5 VC VB VA MODE PS RL SAM CTR CK SPIO SPOI TEST4 TEST3 TEST2 TEST1 GNDL GNDA VCCL VCCA 264 263 262 261 260 259 258 257 256 255 254 253 252 251 250 249 248 247 246 245 244 243 242 2...