lc75808e Sanyo Semiconductor Corporation, lc75808e Datasheet - Page 31

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

3. Output pin states during the system reset
Note: *5. Since this output pin is an open-drain output, a pull-up resistor of between 1 kΩ and 10 kΩ is required. This pin is held at the high level even if a
Sample Application Circuit 1
1/8 duty, 1/4 bias drive technique (for use with normal panels)
From the controller
To the controller
To the controller
power supply
Note: *6. Add a capacitor to the logic block power supply line so that the logic block power supply voltage V
+5 V
+8 V
COM1 to COM10
*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
C ≥ 0.047 µF
KS1 to KS6
Output pin
S1 to S60
P1 to P4
key data read operation is performed before the KC1 to KC6 control data has been transferred to the IC.
logic block power supply voltage V
of the external wiring so that signal waveforms are not degraded.
DO
*6
State during reset
*9
L (V
L (V
L (V
L (V
H *5
LCD
LCD
SS
SS
4)
4)
)
)
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
LCD
Key matrix
(up to 30 keys)
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
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