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HCD66774 PDF Datasheet ( 特性, スペック, ピン接続図 )

部品番号 HCD66774
部品説明 240-Channel Gate Driver
メーカ Hitachi
ロゴ Hitachi ロゴ 



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HCD66774 Datasheet, HCD66774 PDF,ピン配置, 機能
HD66774
Rev. 1.0 July 2002
HD66774
240-Channel Gate Driver for Color-TFT Liquid Crystal
Displays
mRev.1.0
oJuly 2002
.cDescription
UHD66774 is a gate-driver IC for systems with color-TFT-liquid-crystal dot-matrix graphic displays.
t4It incorporates a circuit for driving 240 channels of TFT gate-line driving and all the power-supply
circuits that are required for liquid crystal displays, and realizes the liquid crystal display by adding
only an external capacitor.
eeWhen used with the HD66770 396-channel source driver with on-chip RAM, and used with the
HD66772 528-channel source driver with on-chip RAM, this LSI is suitable for color TFT displays
hof cellular phones having 132-by-176 and 176-by-240 dots, respectively.
SFeatures
taTFT gate-line driving circuits
a240 outputs
.DGate-line scanning
Centering-screen function (vertically separated, comb type)
wInternal power-supply circuit
Step-up circuit: five to nine times, positive-polarity inversion
wStructure of TFT-display retention capacitor: Cst or Cadd
wAlternating functions for TFT-display counter-electrode power supply
N-line alternating drive of Vcom (Vgoff is also available for N-line alternating drive for
Cadd)
Adjustment of Vcom (Vgoff) amplitude: internal 22-level digital potentiometer
Output power-supply voltage
For the source driver: DDVDH - GND = 4.5 to 5.5 V (power supply for HD66770/772
liquid crystal output circuits), VDH - GND = 3.0 to DDVDH-0.5V (reference power supply
for HD66770/772 grayscale voltages)
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