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1
DESCRIPTION
The LH168K is a 324-output TFT-LCD source
driver IC which can simultaneously display 262 144
colors in 64 gray scales.
FEATURES
Selectable number of LCD drive outputs :
324/321/312/309
Built-in 6-bit digital input DAC
Dot-inversion drive : Outputs the inverted gray
scale voltages between LCD drive pins next to
each other
2-port input for each circuit of data inputs R, G
and B, and it is possible to sample and hold
display data of two pixels at the same time at
324-output and 312-output modes. 1-port input for
each circuit of data inputs R, G and B at 321-
output and 309-output modes.
Possible to display 262 144 colors in 64 gray scales
with reference voltage input of 18 gray scales : This
reference voltage input corresponds to correction
and intermediate reference voltage input can be
abbreviated
Cascade connection
Sampling sequence :
Output shift direction can be selected
XO
1
, YO
1
, ZO
1
/
XO
108
, YO
108
, ZO
108
or
ZO
108
, YO
108
, XO
108
/
ZO
1
, YO
1
, XO
1
Shift clock frequency : 55 MHz (MAX.)
Supply voltages
– V
CC
(for logic system) : +2.7 to +3.6 V
– V
LS
(for LCD drive system) : +12 V (MAX.)
Package : 395-pin TCP (Tape Carrier Package)
PIN CONNECTIONS
LH168K
LH168K
324-output TFT-LCD Source Driver IC
XO
108
YO
108
ZO
108
322
323
324
XO
1
YO
1
ZO
1
1
2
3
C
GND
V
GND
MODE
PBS
XB
5
XB
0
XA
5
XA
0
YA
5
YA
SPOI
VH
0
VH
8
VH
16
VH
24
VH
32
VH
40
VH
48
VH
56
VH
63
VL
63
VL
56
VL
48
VL
40
VL
32
VL
24
VL
16
VL
8
VL
POLB
POLA
CK
SPIO
LS
REV
2
REV
YB
5
YB
0
ZB
5
ZB
0
ZA
5
ZA
0
LBR
V
CC
V
GND
395
394
393
392
391
390
385
384
379
378
373
372
371
370
369
368
367
366
365
364
363
362
361
360
359
358
357
356
355
354
353
352
351
350
349
348
347
346
341
340
335
334
329
328
327
326
325
395-PIN TCP
TOP VIEW
NOTE :
Doesn't prescribe TCP outline.