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Part: LH1691
Category:
Optoelectronics
-> Drivers/Controllers
-> LCDs
Description: 240-output Tft-lcd Gate Driver ic
Company: Sharp Microelectronics of the Americas
Datasheet: Download LH1691 datasheet File size : 960 kB
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Datasheet text preview:
LH1691
LH1691
DESCRIPTION
The LH1691 is a 240-output TFT-LCD gate driver IC.
240-output TFT-LCD Gate Driver IC
PIN CONNECTIONS
258-PIN TCP TOP VIEW
FEATURES
ˇ Number of LCD drive outputs : 240 ˇ LCD drive output sequence : Output shift direction can be selected OG1/OG240 or OG240/OG1 ˇ Cascade connection : Max. 2 cascades (internal counting system) ˇ Usable with both positive/negative power supplies ˇ Output mode selection Normal mode (1-pulse scanning) Continuous 2-pulse mode (2-pulse scanning) Jumping 2-pulse mode (2-pulse scanning) ˇ LCD drive voltage : +16.0 to +33.0 V ˇ Operating temperature : 30 to +85 °C ˇ Package : 258-pin TCP (Tape Carrier Package)
VDD VEE VSS VCC VLS TEST1 TEST2 CKV SPV CE R/L MODE1 MODE2 V
LS
1 OG1 2 OG2 3 OG3
VCC VSS VEE VDD
258 257 256 255 254 253 252 251 250 249 248 247 246 245 244 243 242 241
CHIP SURFACE
238 OG238 239 OG239 240 OG240
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
LH1691
PIN DESCRIPTION
PIN NO. 1 to 240 241, 258 242, 257 243, 256 244, 255 245, 254 246, 247 248 249 250 251 252, 253 SYMBOL OG1-OG240 VDD VEE VSS VCC VLS MODE2, MODE1 R/L CE SPV CKV TEST2, TEST1 I/O O I I I I I I DESCRIPTION LCD drive output pins Power supply pins for LCD drive Power supply pins for LCD drive Power supply pins for logic system Power supply pins for logic system Power supply pins for input level shifter Output mode selection pins Pin for selecting bi-directional shift register and setting cascade sequence Cascade sequence setting pin Vertical scanning start pulse input pin Vertical shift clock input pin IC test pins
BLOCK DIAGRAM
M MODE2 246
BI-DIRECTIONAL SHIFT REGISTER 1 CONTROL L OGIC 1 240
ODE1 247 R C/L 248 S E 249 CPV 250 T KV 251 252 OUTPUT CIRCUIT 1 240
LEVEL SHIFTER 240
TEST2
EST1 253
241 258 245 254 244 255 242 257 243 256 VDD VDD VLS VLS VCC VCC VEE VEE VSS VSS
1 OG1
240 OG240
2
LH1691
FUNCTIONAL OPERATIONS OF EACH BLOCK
BLOCK Control Logic Bi-directional Shift Register Level Shifter Output Circuit FUNCTION Used to create signals necessary for mode selecting signal, cascade sequence setting signal and for operation of bi-directional shift register. Used as transfer circuit of LCD drive output start signal. It is possible to set LCD drive output sequence of OG1/OG240 direction or OG240/OG1 direction. Used as circuit which shifts LCD drive output signals transferred by bi-directional shift register to VDD-VEE level. Configured with output buffers to output VDD-VEE level.
INPUT/OUTPUT CIRCUITS
VLS
I
VSS
,
To Internal Circuit
Level Shifter Internal Logic (VLS-0 V/VCC-VSS) (VCC-VSS)
żApplicable pinsĄ CKV, SPV, CE, R/L, MODE1, MODE2, TEST1, TEST2
Fig. 1 Input Circuit
VDD
O
From Internal Circuit (VDD-VEE)
VEE
żApplicable pinsĄ OG1-OG240
Fig. 2 Output Circuit
3
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