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HCD667B74 PDF даташит

Спецификация HCD667B74 изготовлена ​​​​«Hitachi» и имеет функцию, называемую «240-Channel Gate Driver».

Детали детали

Номер произв HCD667B74
Описание 240-Channel Gate Driver
Производители Hitachi
логотип Hitachi логотип 

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HCD667B74 Даташит, Описание, Даташиты
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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HCD667B74 Даташит, Описание, Даташиты
HD66774
Rev. 1.0 July 2002
For the TFT-display counter electrode: Vcom amplitude = 6 V (max), VcomH - GND =
3.0V to VDH , VcomL - GND = 1.0 V to VCL + 0.5 V.
Mode setting
Serial transfer from the HD66770/772 source driver
Low-power consumption
Equalizing function and the switching performance of step-up circuits and operational
amplifiers
Input power-supply voltage
Vcc - GND = 1.7 to 3.6 V
Vci - GND = 2.5 to 3.6 V (internal reference power-supply voltage)
Pad arrangement
Wiring-through area for high-level mounting
Type Number
Type Number
HCD66774BP
External Appearance
Die with Au bump
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HCD667B74 Даташит, Описание, Даташиты
HD66774
Rev. 1.0 July 2002
Pin Functions
Table 1 Pin Functions
Signal Name
Vcc1, Vcc2
GND
Quantity*
2
1
VDH
1
VGH
1
VGL
1
Vci
Vciout
1
1
Vci1
VLOUT1
1
1
Input/
Output
Input
Input
Output
Input
Input
Input
Output
Input
Output
Connected to
Power supply
Power supply
Capacitor for
stabilization,
HD66770/772
VLOUT2 or
power supply
VLOUT3 or
power supply
Vcc or power
supply
Vci1 and
capacitor for
stabilization or
open
VciOUT or
power supply
DDVDH and
capacitor for
stabilization or
open
Function
VCC-GND: A logic-circuit power supply. Supply
the same voltage as that for HD66770/772.
Vcc1 and Vcc2 are equivalent. Supply the
voltage to either or both.
A reference power supply for the HD66770/772
source-driver grayscale voltage. Adjust the
VDH level with VREG1OUT because the
VREG1OUT input voltage is output as the
output level. Connect a capacitor for
stabilization.
A power supply for the gate-line driving circuit,
and a positive-side power supply for TFT-gate
on level, internal step-up circuits, bias circuits,
and operational amplifiers. Connect VLOUT2.
When VLOUT2 is not used, connect an
external-voltage power supply lower than 16.5
V.
A power supply for the gate-line driving circuit,
and a negative-side power supply for the power
supply for the gate-line driving circuit, internal
step-up circuits, bias circuits, and operational
amplifiers. Connect VLOUT3. When VLOUT3
is not used, connect an external-voltage power
supply higher than -16.5 V.
A power supply for the analog circuit. Connect
a 2.5- to 3.6-V external-voltage power supply.
Outputs the internal reference voltage
generated between Vci and GND. The internal
reference voltage can be set by a register.
A step-up voltage for step-up circuit 1. Connect
Vciout or an external power supply lower than
2.75 V.
Outputs a voltage that doubles or triples the
voltage from step-up voltage Vci1. The step-up
factor can be set in an internal register.
Connect a capacitor for stabilization. When this
pin is not used, leave it open.
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