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Ordering number : ENN*6473

CMOS IC

LC75878E, 75878W

1/8 to 1/10 Duty General-Purpose LCD Display Drivers

Preliminary

Overview

The LC75878E and LC75878W are 1/8 to 1/10 duty

general-purpose LCD display drivers used for character

and graphics display. These products operate under the

control of a microcontroller and can directly drive an LCD

with up to 730 segments. They can also control up to 4

general-purpose output ports.

Features

• 1/8duty–1/4bias, 1/9duty–1/4bias, and 1/10duty–1/4bias

drive schemes can be controlled from serial data.

1/8duty–1/4bias: up to 600 segments

1/9duty–1/4bias: up to 666 segments

1/10duty–1/4bias: up to 730 segments

• 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.

• Direct display of display data without the use of a

decoder provides high generality.

• Built-in display contrast adjustment circuit.

• Up to 4 general-purpose output ports are included.

• Independent LCD driver block power supply VLCD.

• The INH pin is provided. This pin turns off the display

and forces the general-purpose output ports to the low

level.

• RC oscillator circuit

Package Dimensions

unit: mm

3151-QFP100E

[LC75878E]

0.575

80

81

0.65

23.2

20.0

0.3

1.6

0.575

51

50

0.15

100

1

31

30

0.1

2.7

21.6 0.8

SANYO: QFP100E

unit: mm

3181B-SQFP100

[LC75878W]

1.0 0.5

75

16.0

14.0

1.0

51

76

50

0.145

100

1

0.2

26

25 0.1

1.4

• 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.

0.5 0.5

SANYO: SQFP100

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.

SANYO Electric Co.,Ltd. Semiconductor Company

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN

41000RM (OT) No. 6473 -1/33

LC75878E, 75878W

Electrical Characteristics for the Allowable Operating Ranges

Parameter

Hysteresis

Input high level current

Input low level current

Output high level voltage

Output low level voltage

Output middle level voltage *

Oscillator frequency

Current drain

Symbol

VH

IIH

IIL

VOH1

VOH2

VOH3

VOL1

VOL2

VOL3

VMID1

VMID2

VMID3

fosc

IDD1

IDD2

ILCD1

ILCD2

ILCD3

Conditions

min

CE, CL, DI, INH

CE, CL, DI, INH: VI = 6.0 V

CE, CL, DI, INH: VI = 0 V

S1 to S75: IO = –20 µA

COM1 to COM10: IO = –100 µA

P1 to P4: IO = –1 mA

S1 to S75: IO = 20 µA

COM1 to COM10: IO = 100 µA

P1 to P4: IO = 1 mA

S1 to S75: IO = ±20 µA

–5.0

VLCD0 – 0.6

VLCD0 – 0.6

VDD – 1.0

2/4

(VLCD0 – VLCD4)

–0.6

COM1 to COM10: IO = ±100 µA

3/4

(VLCD0 – VLCD4)

–0.6

COM1 to COM10: IO = ±100 µA

1/4

(VLCD0 – VLCD4)

–0.6

OSC: ROSC = 43 kΩ, COSC = 680 pF

VDD : Power saving mode

VDD: VDD = 6.0 V, outputs open, fosc = 50 kHz

VLCD : Power saving mode

VLCD : VLCD = 11.0 V

Outputs open

fosc = 50 kHz

When the display contrast adjustment circuit is used.

40

VLCD : VLCD = 11.0 V

Outputs open

fosc = 50 kHz

When the display contrast adjustment circuit is not used.

Ratings

typ

0.1 VDD

max

5.0

VLCD4 + 0.6

VLCD4 + 0.6

1.0

2/4

(VLCD0 – VLCD4)

+0.6

3/4

(VLCD0 – VLCD4)

+0.6

1/4

(VLCD0 – VLCD4)

+0.6

50 60

5

200 400

5

500 1000

250 500

Note: * Excluding the bias voltage generation divider resistor built into VLCD0, VLCD1, VLCD2 , VLCD3, and VLCD4. (See Figure 1.)

Unit

V

µA

µA

V

V

V

kHz

µA

No. 6473-4/33

LC75878E, 75878W

Pin Functions

Pin

S1 to S73

S74/COM10

S75/COM9

COM1 to COM8

P1 to P4

Pin No.

LC75878E LC75878W

3 to 75

76

77

1 to 73

74

75

85 to 78

83 to 76

86 to 89

84 to 87

Function

Segment driver outputs.

The S74/COM10 and S75/COM9 pins can be used as common

driver outputs under the control data.

Common driver outputs.

General-purpose output ports.

OSC

98

Oscillator connection.

96 An oscillator circuit is formed by connecting an external resistor and

capacitor at this pin.

Active

—

—

—

—

CE 100 98 Serial data transfer inputs.

These pins are connected to the microcontroller.

CL 1 99 CE :Chip enable

CL :Synchronization clock

DI 2 100 DI :Transfer data

H

v

—

INH 99

Input that turns the display off and forces the general-purpose output

ports low.

• When INH is low (VSS)

• Display off

S1 to S73 = “L” (VLCD4).

S74/COM10, S75/COM9 = “L” (VLCD4)

COM1 to COM8 = “L” (VLCD4).

97 • General-purpose output ports P1 to P4 = low (VSS)

• When INH is high (VDD)

• Display on

L

• The states of the general-purpose output ports can be set by

the PC1 to PC4 control data.

However, serial data can be transferred when the INH pin is low.

VLCD0

92

LCD drive 4/4 bias voltage (high level) supply pin. The level on this pin

can be changed by the display contrast adjustment circuit.

90 However, (VLCD0 – VLCD4) must be greater than or equal to 4.5 V.

Also,external power must not be applied to this pin since the pin circuit

includes the display contrast adjustment circuit.

—

VLCD1

93

LCD drive 3/4 bias voltage (middle level) supply pin. This pin can be

91 used to supply the 3/4 (VLCD0 – VLCD4) voltage level externally.

—

VLCD2

VLCD3

94

95

LCD drive 2/4 bias voltage (middle level) supply pin. This pin can be

92 used to supply the 2/4 (VLCD0 – VLCD4) voltage level externally.

LCD drive 1/4 bias voltage (middle level) supply pin. This pin can be

93 used to supply the 1/4 (VLCD0 – VLCD4) voltage level externally.

—

—

VLCD4

96

VDD

VLCD

VSS

90

91

97

LCD drive 0/4 bias voltage (low level) supply pin. Fine adjustment of the

display contrast can be implemented by connecting an external variable

94 resistor to this pin.

—

However, (VLCD0 – VLCD4) must be greater than or equal to 4.5 V, and

VLCD4 must be in the range 0 V to 1.5 V, inclusive.

Logic block power supply connection. Provide a voltage of between 2.7

88 and 6.0V.

—

LCD driver block power supply connection. Provide a voltage of between

89 7.0 and 11.0 V when the display contrast adjustment circuit is used and —

provide a voltage of between 4.5 and 11.0 V when the circuit is not used.

95 Power supply connection. Connect to ground.

—

I/O

Handling

when unused

q Open

q Open

q Open

I/O VDD

I

I GND

I

I GND

O Open

I Open

I Open

I Open

I GND

——

——

——

No. 6473 -7/39

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