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Part: LH1687
Category:
Optoelectronics
-> Drivers/Controllers
-> LCDs
Description: 240-output Tft-lcd Source Driver ic
Company: Sharp Microelectronics of the Americas
Datasheet: Download LH1687 datasheet File size : 40 kB
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Datasheet text preview:
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
264 263 262 261 260 259 258 257 256 255 254 253 252 251 250 249 248 247 246 245 244 243 242 241
CHIP SURFACE
240 OS240
NOTE :
Doesn't prescribe TCP outline.
In the absence of confirmation by device specification sheets, SHARP takes no responsibility for any defects that may occur in equipment using any SHARP devices shown in catalogs, data books, etc. Contact SHARP in order to obtain the latest device specification sheets before using any SHARP device.
1
LH1687
PIN DESCRIPTION
PIN NO. 1 to 240 241, 264 242, 263 243, 262 244, 261 245 to 248 249 250 251 252 253 254 255 256 257 to 259 260 SYMBOL OS1-OS240 VCCA VCCL GNDA GNDL TST1-TST4 SPOI SPIO CK CTR SAM RL PS MODE VA, VB, VC TST5 I/O O I I/O I/O I I I I I I I I DESCRIPTION LCD drive output pins Power supply pins for LCD drive circuit Power supply pins for logic circuit Ground pins for LCD drive system Ground pins for logic system IC test pins Start pulse input/cascade output pin Start pulse input/cascade output pin Horizontal shift clock input pin LCD drive circuit operation selection pin Sampling mode selection pin Sampling sequence selection pin Power save mode setting pin Video signals form setting pin Video signal input pins IC test pin
2
LH1687
BLOCK DIAGRAM
SPOI 249 SPIO 250 CK 251 CTR 252 SAM 253 RL 254 CONTROL L OGIC SAMPLING SIGNAL CREATION CIRCUIT 1 240 BI-DIRECTIONAL SHIFT REGISTER
TST1 245 TST2 246 TST3 247 1
240
MODE 256 VA 257 VB 258 VC 259 SMODE CETTING IRCUIT
SAMPLE AND HOLD CIRCUIT
1
240
PS 255 TST4 248 TST5 260
G
BIAS EC ERATION N IRCUIT 1
OUTPUT CIRCUIT
240
241 264 VCCA VCCA
242 263
243 262
244 261
1
240 OS240
VCCL VCCL GNDA GNDA GNDL GNDL OS1
3
Others parts begin by lh
LH-1 LH-2 LH-3 LH-4 LH-5 LH-6 LH-7 LH-8 LH-9 LH-10 LH-11
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