lc75808e Sanyo Semiconductor Corporation, lc75808e Datasheet - Page 32

• Manufacturer Part Number: lc75808e
• Description: 1/8 To 1/10 Duty Lcd Display Drivers With Key Input Function
• Manufacturer: Sanyo Semiconductor Corporation

From the controller
Sample Application Circuit 2
1/8 duty, 1/4 bias drive technique (for use with large panels)
Note: *6. Add a capacitor to the logic block power supply line so that the logic block power supply voltage V
To the controller
To the controller
power supply
+5 V
+8 V
C ≥ 0.047 µF
10 kΩ ≥ R ≥ 2.2 kΩ
*7. If a variable resistor is not used for display contrast fine adjustment, the V
*8. If the function of the INH pin is not used, the INH pin must be connected to the logic block power supply V
*9. The DO pin, being an open-drain output, requires a pull-up resistor. Select a resistance (between 1 kΩ to 10 kΩ) appropriate for the capacitance
logic block power supply voltage V
of the external wiring so that signal waveforms are not degraded.
*6
*9
DD
fall time when power drops are both at least 1 ms, as the LC75808E/W is reset by the VDET.
*8
*7
LC75808E, 75808W
Key matrix
(up to 30 keys)
LCD
4 pin must be connected to ground.
general-purpose output ports
Used with the backlight
controller or other circuit.
DD
rise time when power is applied and the
DD
.
LCD panel
No. 6370 -32/39