LC75812PT datasheet(2/54 Pages) SANYO

2 / 54 page

LC75812PT

No.A1417-2/54

Continued from preceding page.

• Sleep mode can be used to reduce current drain.

• Built-in display contrast adjustment circuit

• Switching between key scan output and general-purpose output ports can be controlled with instructions.

• PWM output for adjusting the LED backlight brightness

• The frame frequency of the common and segment output waveforms can be controlled by instructions.

• Serial data control of switching between the RC oscillator operating mode and external clock operating mode.

• Independent LCD driver block power supply VLCD

• A voltage detection type reset circuit is provided to initialize the IC and prevent incorrect display.

• The INH pin is provided. This pin turns off the display, disables key scanning, and forces the general-purpose

output ports to the low level.

• RC oscillator circuit

Specifications

Absolute Maximum Ratings

at Ta = 25

°C, VSS = 0V

Parameter

Symbol

Conditions

Ratings

Unit

VDD max

VDD

-0.3 to +4.2

Maximum supply voltage

VLCD max

VLCD

-0.3 to +11.0

CE, CL, DI, INH

-0.3 to +4.2

VIN1

CE, CL, DI, INH

VDD=2.7 to 3.6V

-0.3 to +6.5

VIN2

OSC, KI1 to KI5, TEST

-0.3 to VDD +0.3

Input voltage

VIN3

VLCD1, VLCD2, VLCD3, VLCD4

-0.3 to VLCD +0.3

VOUT1

-0.3 to +6.5

VOUT2

OSC, KS1 to KS7, P1 to P3

-0.3 to VDD +0.3

Output voltage

VOUT3

VLCD0, S1 to S65, COM1 to COM9

-0.3 to VLCD +0.3

IOUT1

S1 to S65

300

μA

IOUT2

COM1 to COM9

IOUT3

KS1 to KS7

Output current

IOUT4

P1 to P3

Allowable power dissipation

Pd max

Ta=85

°C

200

Operating temperature

Topr

-40 to +85

°C

Storage temperature

Tstg

-55 to +125

°C

Allowable Operating Range

at Ta = -40

°C to +85°C, VSS = 0V

Ratings

Parameter

Symbol

Conditions

min

typ

max

unit

VDD

2.7

3.6

VLCD

When the display contrast adjustment circuit is used.

7.0

10.0

Supply voltage

VLCD

When the display contrast adjustment circuit is not

used.

4.5

10.0

Output voltage

VLCD0

VLCD4

+4.5

VLCD

VLCD1

3/4

(VLCD0-

VLCD4)

VLCD0

VLCD2

2/4

(VLCD0-

VLCD4)

VLCD0

VLCD3

1/4

(VLCD0-

VLCD4)

VLCD0

Input voltage

VLCD4

1.5

Continued on next page.

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