HD66130T Datasheet, PDF (14/16 Pages) Hitachi Semiconductor – 320-channel Low-voltage Segment Driver for Dot-Matrix STN Liquid Crystal Display

HD66130T
V1 = GND + 1.0
The voltage range of the liquid crystal drive level power supply is described. A voltage around
the GND is applied to pin V1, and an intermediate voltage of about V0 and V1 is applied to pin
VM. Use the V1 in the range of ∆V = 0.25 x V0, in which the impedance Ron of driver output is
stable.
V0
VM
∆V = 0.25 x V0
V1
GND
Relationship between the driver output waveform and each level voltage
2. A current flowing in the input or output section is excluded. If an input signal is at an
intermediate level for the CMOS, a through-current flows in the input circuit and power supply
current increases. Therefore, VIH must be at the Vcc level and VIL must be at the GND level.
3. Current at standby
4. The voltage of each signal is shown below.
Segment
voltage
Segment waveform
Common waveform
Common
voltage
VH (23.0 V)
V0 (5.0 V)
Vcc (3.3 V)
VM (3.0 V)
V1 (1.0 V)
GND (0.0 V)
Vcc (3.3 V)
VM (3.0 V)
GND (0.0 V)
VL (–17.0 V)
Normal display period
Display-off
period
Normal display period
Display-off
period
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