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PDF LC75844M Datasheet ( Hoja de datos )

Número de pieza LC75844M
Descripción 1/4-Duty General-Purpose LCD Display Driver
Fabricantes ON Semiconductor 
Logotipo ON Semiconductor Logotipo

Total 15 Páginas
		
LC75844M Hoja de datos, Descripción, Manual
Ordering number : EN6235A
LC75844M
CMOS IC
1/4-Duty General-Purpose
LCD Display Driver
http://onsemi.com
Overview
The LC75844M is a 1/4 duty general-purpose LCD driver that can be used for frequency display in electronic tuners
under the control of a microcontroller. The LC75844M can drive an LCD with up to 88 segments directly. The
LC75844M can also control up to 4 general-purpose output ports. Since the LC75844M uses separate power supply
systems for the LCD drive block and the logic block, the LCD driver block power-supply voltage can be set to any
voltage in the range 2.7 to 6.0 volts, regardless of the logic block power-supply voltage.
Application
Car, Home frequency display
Features
Support for 1/4 duty 1/2 bias or 1/4 duty 1/3 bias drive of up to 88 segments under serial data control.
Serial data input supports CCB format communication with the system controller.
Serial data control of the power-saving mode based backup function and all the segments forced off function
Serial data control of switching between the segment output port and the general-purpose output port functions
High generality, since display data is displayed directly without decoder intervention.
Independent VLCD for the LCD driver block (VLCD can be set to any voltage in the range 2.7 to 6.0 volts,
regardless of the logic block power-supply voltage.)
The INH pin can force the display to the off state.
RC oscillator circuit
CCB is ON Semiconductor® ’s original format. All addresses are managed
by ON Semiconductor® for this format.
CCB is a registered trademark of Semiconductor Components Industries, LLC.
Semiconductor Components Industries, LLC, 2013
July, 2013
80608HKIM B8-8317 / 92299TH(OT) No.6235-1/15

1 page

LC75844M pdf
Pin Assignment
LC75844M
36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19
LC75844M
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
Top view
Block Diagram
INH
OSC
VDD
VLCD
VLCD1
VLCD2
VSS
COMMON
DRIVER
CLOCK
GENERATOR
SEGMENT DRIVER & LATCH
SHIFT REGISTER
ADDRESS
DETECTOR
No.6235-5/15

5 Page

LC75844M arduino
LC75844M
Output Waveforms (1/4-Duty 1/3-Bias ON System)
fosc
[Hz]
512
COM1
COM2
COM3
COM4
LCD driver output when LCD segments for
COM1, COM2, COM3 and COM4 are off.
LCD driver output when only LCD segment for
COM1 is on.
LCD driver output when only LCD segment for
COM2 is on.
LCD driver output when LCD segments for
COM1 and COM2 are on.
LCD driver output when only LCD segment for
COM3 is on.
LCD driver output when LCD segments for
COM1 and COM3 are on.
LCD driver output when LCD segments for
COM2 and COM3 are on.
LCD driver output when LCD segments for
COM1, COM2 and COM3 are on.
LCD driver output when only LCD segment for
COM4 is on.
LCD driver output when LCD segments for
COM2 and COM4 are on.
LCD driver output when LCD segments for
COM1, COM2, COM3 and COM4 are on.
1/4 duty, 1/3 bias waveform
VLCD
VLCD1
VLCD2
0V
VLCD
VLCD1
VLCD2
0V
VLCD
VLCD1
VLCD2
0V
VLCD
VLCD1
VLCD2
0V
VLCD
VLCD1
VLCD2
0V
VLCD
VLCD1
VLCD2
0V
VLCD
VLCD1
VLCD2
0V
VLCD
VLCD1
VLCD2
0V
VLCD
VLCD1
VLCD2
0V
VLCD
VLCD1
VLCD2
0V
VLCD
VLCD1
VLCD2
0V
VLCD
VLCD1
VLCD2
0V
VLCD
VLCD1
VLCD2
0V
VLCD
VLCD1
VLCD2
0V
VLCD
VLCD1
VLCD2
0V
No.6235-11/15

11 Page


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