LC75847T Datasheet, PDF (1/27 Pages) Sanyo Semicon Device – 1/3, 1/4 Duty General-Purpose LCD Driver

Ordering number : ENN7389A
CMOS IC
LC75847T
1/3, 1/4 Duty General-Purpose LCD Driver
Overview
The LC75847T is 1/3 duty and 1/4 duty general-purpose
LCD driver that can be used for frequency display in
electronic tuners under the control of a microcontroller.
The LC75847T can drive an LCD with up to 420
segments directly. The LC75847T can also control up to
8 general-purpose output ports.
Features
• Switching between 1/3 duty and 1/4 duty drive
techniques under serial data control.
• Switching between 1/2 bias and 1/3 bias drive
techniques under serial data control.
• Up to 318 segments for 1/3 duty drive and 420 segments
for 1/4 duty drive can be displayed.
Specifications
Absolute Maximum Ratings at Ta = 25°C, V_SS = 0 V
• 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.
• Serial data control of frame frequency for common and
segment output waveforms.
• High generality, since display data is displayed directly
without decoder intervention.
• Built-in display contrast adjustment circuit
• Independent V_LCD for the LCD driver block
• The INH pin can force the display to the off state.
• RC oscillator circuit
Parameter
Maximum supply voltage
Input voltage
Output voltage
Output current
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
V_DD max
V_LCD max
V_IN1
V_IN2
V_IN3
V_OUT1
V_OUT2
I_OUT1
I_OUT2
I_OUT3
Pd max
Topr
Tstg
Conditions
V_DD
V_LCD
CE, CL, DI, INH
OSC
V_LCD1, V_LCD2
OSC
V_LCD0, S1 to S106, COM1 to COM4, P1 to P8
S1 to S106
COM1 to COM4
P1 to P8
Ta = 85°C
Ratings
Unit
–0.3 to +7.0
V
–0.3 to +7.0
–0.3 to +7.0
–0.3 to V_DD + 0.3
V
–0.3 to V_LCD + 0.3
–0.3 to V_DD + 0.3
V
–0.3 to V_LCD + 0.3
300
µA
3
mA
5
200
mW
–40 to +85
°C
–55 to +125
°C
• CCB is a trademark of SANYO ELECTRIC CO., LTD.
• CCB is SANYO’s original bus format and all the bus
addresses are controlled by SANYO.
Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft’s
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.
SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.
73004TN (OT) / 70703SI (OT) No. 7389-1/27