lc75857e Sanyo Semiconductor Corporation, lc75857e Datasheet - Page 29
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lc75857e
Manufacturer Part Number
lc75857e
Description
1/3, 1/4 Duty Lcd Display Drivers With Key Input Function
Manufacturer
Sanyo Semiconductor Corporation
Datasheet
1.LC75857E.pdf
(39 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
lc75857e-E
Manufacturer:
SANYO/三洋
Quantity:
20 000
Sample Application Circuit 1
1/3 duty, 1/2 bias (for use with normal panels)
From the controller
To the controller
Notes:*10. Add a capacitor to the logic block power supply line so that the logic block power supply voltage V
To the controller
power supply
*11. When RC oscillator mode is used, the external resistor Rosc and the external capacitor Cosc must be connected between the OSC pin and
*12. The DO pin, being an open-drain output, requires a pull-up resistor. Select a resistance (between 1 to 10 kΩ) appropriate for the capacitance of
block power supply voltage V
the external wiring so that signal waveforms are not degraded.
ground, and when external clock mode is selected the current protection resistor Rg (4.7 to 47 kΩ) must be connected between the OSC pin and
the external clock output pin (external oscillator). (See the section on the OSC pin peripheral circuit.)
+3V
+5V
C
0.047 F
*12
DD
*10
fall time when power drops are both at least 1 ms, as the LC75857E/W is reset by the VDET.
C
VDD
VSS
TEST
VLCD
VLCD1
VLCD2
CE
CL
DI
DO
LC75857E, LC75857W
K
I
5
K
I
4
K
I
3
OSC
*11
K
I
2
K
I
1
K
S
6
K
S
5
K
S
4
COM4/S39
S
4
2
/
K
S
3
S
4
1
/
K
S
2
COM1
COM2
COM3
S
4
0
/
K
S
1
P2/S2
P3/S3
P4/S4
P1/S1
S38
S5
Key matrix
(up to 30 keys)
DD
(S40)
(S41)
(S42)
(P1)
(P2)
(P3)
(P4)
rise time when power is applied and the logic
(general-purpose output ports)
Used with the backlight
controller or other circuit.
No. 7980-29/39