LC75886PW Datasheet, PDF (28/36 Pages) ON Semiconductor – 1/4 and 1/3-Duty LCD Display Driver

Sample Application Circuit 3
LC75886PW
1/3 duty, 1/3 bias (for use with normal panels)
+5V
*11
C≥0.047μF
CC
*15
From the
controller
*15
To the controller
To the controller
power supply
*14
VDD
VSS
TEST
OSC
*13
VDD1
VDD2
COM1
COM2
COM3
P1/S1
P2/S2
P3/S3
P4/S4
S5
S53
COM4/S54
RES _*12
CE
CL
DI ^{K K K K K}
DO ^{I I I I I}
54321
SS
55
65
//
KKKKKK
SSSSSS
654321
P5/S57
(P1) (Genenal-purpose
(P2) ^{output port)}
(P3) Used with the
(P4) ^{backlight controller}
P5
or other circuit.
(S54)
(S55)
(S56)
(S57)
Key matrix
(up to 30 keys)
Note: *11. Add a capacitor to the power supply line so that the power supply voltage VDD rise time when power is
applied and the power supply voltage VDD fall time when power drops are both at least 1ms, as the
LC75886PW is reset by the VDET.
*12. If the RES pin is not used for system reset, it must be connected to the power supply VDD.
*13. When RC oscillator operating mode is used, the external resistor ROSC and the external capacitor COSC
must be connected between the OSC pin and GND, and when external clock operating mode is selected the
current protection resistor Rg (4.7 to 47kΩ) must be connected between the OSC pin and the external clock
output pin (external oscillator). (See the section on the OSC pin peripheral circuit.)
*14. The DO pin, being an open-drain output, requires a pull-up resistor. Select a resistance (between 1 to 10kΩ)
appropriate for the capacitance of the external wiring so that signal waveforms are not degraded.
*15. The pins to be connected to the controller (CE, CL, DI, DO, RES) can handle 3.3V or 5V.
No.A1391-28/36