SANYO LC75814V Datasheet

Ordering number : ENN6792

71001TN (OT) No. 6792-1/14

Overview

The LC75814V 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 LC75814V can drive an LCD with up to 64 segments directly. The LC75814V can also control up to 4 general-purpose output ports. Since the LC75814V 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.

Features

• Support for 1/4 duty 1/2 bias or 1/4 duty 1/3 bias drive of up to 64 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 V

LCD

for the LCD driver block (V

LCD

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

Package Dimensions

unit: mm

3191A-SSOP30

115

16

7.6

0.65

9.75

0.5

5.6

0.1

1.5max

30

0.22

(0.33)

0.15

(1.3)

SANYO: SSOP30

[LC75814V]

LC75814V

SANYO Electric Co.,Ltd. Semiconductor Company

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

1/4 Duty General-Purpose LCD Driver

CMOS IC

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.

• CCB is a trademark of SANYO ELECTRIC CO., LTD.

• CCB is a SANYO’s original bus format and all the bus addresses are controlled by SANYO.

Pin Assignment

No. 6792-2/14

LC75814V

DIP1/S1

ILC00283

CLP2/S2

CEP3/S3

P4/S4

OSCS5

V

SS

S6

V

LCD

2S7

V

LCD

1S8

V

LCD

S9

V

DD

S10

COM4S11

COM3S12

COM2S13

COM1S14

S16S15

LC75814V

INH

Specifications

Absolute Maximum Ratings at Ta = 25°C, VSS= 0 V

Parameter Symbol Conditions Ratings Unit

Maximum supply voltage

V

DD

max V

DD

–0.3 to +7.0 V

V

LCD

max V

LCD

–0.3 to +7.0 V

V

IN

1 CE, CL, DI, INH –0.3 to +7.0 V

Input voltage V

IN

2 OSC –0.3 to VDD+ 0.3 V

V

IN

3 V

LCD

1, V

LCD

2 –0.3 to V

LCD

+ 0.3 V

Output voltage

V

OUT

1 OSC –0.3 to VDD+ 0.3 V

V

OUT

2 S1 to S16, COM1 to COM4, P1 to P4 –0.3 to V

LCD

+ 0.3 V

I

OUT

1 S1 to S16 300 µA

Output current I

OUT

2 COM1 to COM4 3 mA

I

OUT

3 P1 to P4 5 mA Allowable power dissipation Pd max Ta = 85°C 100 mW Operating temperature Topr –40 to +85 °C Storage temperature Tstg –55 to +125 °C

Allowable Operating Ranges at Ta = –40 to +85°C, VSS= 0 V

Parameter Symbol Conditions

Ratings

Unit

min typ max

Supply voltage

V

DD

V

DD

2.7 6.0 V

V

LCD

V

LCD

2.7 6.0 V

Input voltage

V

LCD

1 V

LCD

1 2/3 V

LCD

V

LCD

V

LCD

2 V

LCD

2 1/3 V

LCD

V

LCD

V

Input high level voltage V

IH

CE, CL, DI, INH 0.8 V

DD

6.0 V

Input low level voltage V

IL

CE, CL, DI, INH 0 0.2 V

DD

V

Recommended external resistance R

OSC

OSC 43 kΩ

Recommended external capacitance C

OSC

OSC 680 pF

Guaranteed oscillation range f

OSC

OSC 25 50 100 kHz

Data setup time t

ds

CL, DI: Figure 2 160 ns

Data hold time t

dh

CL, DI: Figure 2 160 ns

CE wait time t

cp

CE, CL: Figure 2 160 ns

CE setup time t

cs

CE, CL: Figure 2 160 ns

CE hold time t

ch

CE, CL: Figure 2 160 ns

High level clock pulse width t

øH CL: Figure 2 160 ns

Low level clock pulse width t

øL CL: Figure 2 160 ns

Rise time t

r

CE, CL, DI: Figure 2 160 ns

Fall time t

f

CE, CL, DI: Figure 2 160 ns

INH switching time t

c

INH, CE: Figure 3 10 µs

Top view

No. 6792-3/14

LC75814V

Parameter Symbol Conditions

Ratings

Unit

min typ max

Hysteresis V

H

CE, CL, DI, INH 0.1 V

DD

V

Input high level current I

IH

CE, CL, DI, INH; VI= 6.0 V 5.0 µA

Input low level current I

IL

CE, CL, DI, INH; VI= 0 V –5.0 µA

V

OH

1 S1 to S16; IO= –20 µA V

LCD

– 0.9 V

Output high level voltage V

OH

2 COM1 to COM4; IO= –100 µA V

LCD

– 0.9 V

V

OH

3 P1 to P4; IO= –1 mA V

LCD

– 0.9 V

V

OL

1 S1 to S16; IO= 20 µA 0.9 V

Output low level voltage V

OL

2 COM1 to COM4; IO= 100 µA 0.9 V

V

OL

3 P1 to P4; IO= 1 mA 0.9 V

V

MID

1

COM1 to COM4; 1/2 bias,

1/2 V

LCD

– 0.9 1/2 V

LCD

+ 0.9 V

I

O

= ±100 µA

V

MID

2

S1 to S16; 1/3 bias,

2/3 V

LCD

– 0.9 2/3 V

LCD

+ 0.9 V

I

O

= ±20 µA

Output middle level voltage*

1

V

MID

3

S1 to S16; 1/3 bias,

1/3 V

LCD

– 0.9 1/3 V

LCD

+ 0.9 V

I

O

= ±20 µA

V

MID

4

COM1 to COM4; 1/3 bias,

2/3 V

LCD

– 0.9 2/3 V

LCD

+ 0.9 V

I

O

= ±100 µA

V

MID

5

COM1 to COM4; 1/3 bias,

1/3 V

LCD

– 0.9 1/3 V

LCD

+ 0.9 V

I

O

= ±100 µA

Oscillator frequency f

OSC

OSC; R

OSC

= 43 kΩ, C

OSC

= 680 pF 40 50 60 kHz

I

DD

1 VDD; power saving mode 5 µA

I

DD

2 VDD; VDD= 6.0 V, output open, fosc = 50 k Hz 230 460 µA

I

LCD

1 V

LCD

; power saving mode 5 µA

Current drain

I

LCD

2

V

LCD

; V

LCD

= 6.0 V, output open

100 200 µA

1/2 bias, fosc = 50 k Hz

I

LCD

3

V

LCD

; V

LCD

= 6.0 V, output open

60 120 µA

1/3 bias, fosc = 50 k Hz

Electrical Characteristics for the Allowable Operating Ranges

Note: *1 Excluding the bias voltage generation divider resistors built in the V

LCD

1 and V

LCD

2. (See Figure 1.)

ILC00269

V

LCD

V

LCD

1

V

LCD

2

To the common segments drivers

Except these resistors

V

SS

Figure 1

No. 6792-4/14

LC75814V

Figure 2

Block Diagram

V

IH

V

IL

V

IH

V

IL

V

IH

V

IL

tf

tøL tøH

tds

tcp tcs tch

tdh

tr

50%

CE

CL

DI

ILC00271

2. When CL is stopped at the high level

V

DD

V

LCD

OSC

V

LCD

1

V

LCD

2

V

SS

DI S16

S15

S5

S4 / P4

S3 / P3

S2 / P2

S1 / P1

COM4

COM3

COM2

COM1

ILC00272

CL

CE

ADDRESS

DETECTOR

SEGMENT DRIVER & LATCH

SHIFT REGISTER

COMMON

DRIVER

CLOCK

GENERATOR

INH

V

IH

V

IL

V

IH

V

IL

V

IH

V

IL

tr

tøH tøL

tds

tcp tcs tch

tdh

tf

50%

CE

CL

DI

ILC00270

1. When CL is stopped at the low level

Pin Functions

No. 6792-5/14

LC75814V

CE: Chip enable CL: Synchronization clock DI: Transfer data

H

—

S1/P1 to

S4/P4

S5 to S16

1 to 4

5 to 16

— O Open

Segment outputs for displaying the display data transferred by serial data input. The pins S1/P1 to S4/P4 can be used as general-purpose output ports when so set up by the control data.

COM1 COM2 COM3 COM4

17 to 20 — O Open

Common driver outputs. The frame frequency f

O

is given by: fO= (f

OSC

/512) Hz.

OSC

26

CE

CL

DI

28 29 30

Serial data transfer inputs. These pins are connected to the control microprocessor.

—

I/O

V

DD

I GND

Oscillator connection An oscillator circuit is formed by connecting an external resistor and capacitor to this pin.

V

LCD

1

23 — I Open

Used to apply the LCD drive 2/3 bias voltage externally. This pin must be connected to V

LCD

2 when 1/2 bias drive is used.

V

LCD

2

24 — I Open

Used to apply the LCD drive 1/3 bias voltage externally. This pin must be connected to V

LCD

1 when 1/2 bias drive is used.

V

DD

21 — — —Logic block power supply. Provide a voltage in the range 2.7 to 6.0 V.

V

LCD

22 — — —LCD driver block power supply. Provide a voltage in the range 2.7 to 6.0 V.

V

SS

25 — — —Ground pin. Connect to ground.

INH 27 L I GND

Display off control input

•INH = low (V

SS

): Off

S1/P1 to S4/P4 = Low (These pins are forcibly set to the segment output port function and fixed at the V

SS

level.)

S5 to S16 = Low (V

SS

),

COM1 to COM4 = Low (V

SS

)

•INH = high (V

DD

): On Note that serial data transfers can be performed when the display is forced off by this pin.

Active I/O

Handling

when unused

FunctionPin No.

Serial Data Transfer Format

1. When CL is stopped at the low level

Note: DD ... Direction data

1

B0

CL

CE

DI

ILC00273

1B11B21B30A00A11A20A3D1 D2 D3

D21 D22 D23 D24 D25 D26 D27 D28 D29 D30 D31 D32

0 P0 P1 P2 DR SC BU 0

CCB address

8 bits

Display data

32 bits

Control data

7 bits

DD

1 bit

1B01B11B21B30A00A11A20A3D33

D34 D35 D53 D54 D55 D56 D57 D58 D59 D60 D61 D62 D63 D64

0 0 0 0 0 0 0 1

CCB address

8 bits

Display data

32 bits

Fixed data

7 bits

DD

1 bit