LC75852W - Asynchronous Silicon Gate 1/2 Duty LCD Driver with

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LC75852W 기능

기능

Asynchronous Silicon Gate 1/2 Duty LCD Driver with On-Chip Key Input Function

제조업체

Sanyo Semicon Device

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Ordering number : EN4828A

CMOS LSI

LC75852E, 75852W

Asynchronous Silicon Gate 1/2 Duty LCD Driver

with On-Chip Key Input Function

Overview

The LC75852E and LC75852W are 1/2 duty dynamic

LCD display drivers. In addition to being able to directly

drive LCD panels with up to 90 segments, they can also

control up to four general-purpose output ports. These

products also include a key scan circuit which allows

them to accept input from keypads with up to 30 keys.

This allows end product front panel wiring to be

simplified.

Features

• Up to 30 key inputs (Key scan is only performed when a

key is pressed.)

• 1/2 duty – 1/2 bias (up to 90 segments)

• Sleep mode and the all segments off function can be

controlled from serial data.

• Segment output port/general-purpose output port usage

can be controlled from serial data.

• Serial data I/O supports CCB format communication

with the system controller.

• High generality since display data is displayed directly

without decoder intervention

• Reset pin that can establish the initial state.

Package Dimensions

unit: mm

3159-QFP64E

[LC75852E]

unit: mm

3190-SQFP64

[LC75852W]

SANYO: QIP64E

• 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.

Specifications

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

SANYO: SQFP64

Parameter

Maximum supply voltage

Input voltage

Output voltage

Output current

Allowable power dissipation

Operating temperature

Storage temperature

Symbol

VDD max

VIN

VOUT

IOUT1

IOUT2

IOUT3

Pd max

Topr

Tstg

Conditions

VDD

OSC, CE, CL, DI, RES, KI1 to KI5

OSC, DO, S1 to S45, COM1, COM2, KS1 to KS6, P1 to P4

S1 to S45

COM1, COM2, KS1 to KS6

P1 to P4

Ta = 85°C

Ratings

–0.3 to +7.0

–0.3 to VDD + 0.3

100

200

–40 to +85

–55 to +125

Unit

µA

°C

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

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

63096HA (OT)/N1594TH (OT) B8-1326, 1328 No. 4828-1/16

Block Diagram

LC75852E, 75852W

Pin Functions

S1/P1 to S4/P4

S5 to S43

Pin No.

Function

Active

1 to 4

5 to 43

Segment outputs: Used to output the display data that is transmitted over the

serial data input. Pins S1/P1 to S4/P4 can be used as general-purpose outputs

according to control data specification.

—

Handling when

I/O unused

O Open

COM1

COM2

KS1/S44,

KS2/S45,

KS3 to KS6

KI1 to KI5

OSC

RES

VDD

VSS

Common driver outputs. The frame frequency fO is (fOSC/512) Hz.

— O Open

48 to 51

Key scan outputs. When a key matrix is formed, normally a diode will be

attached to the key scan timing line to prevent shorts. However, since the

output transistor impedance is an unbalanced CMOS output, it will not be

damaged if shorted. Pins KS1/S44 and KS2/S45 can be used as segment

outputs according to control data specification.

— O Open

52 to 56

Key scan inputs: Pins with a built-in pull-down resistor.

Oscillator connection: Oscillator circuit can be formed by connecting the pin to

a resistor and a capacitor.

Serial data interface: Connected

to the controller. Since DO is an

open-drain output, it requires a

pull-up resistor.

CE: Chip enable

CL: Synchronization clock

DI: Transfer data

DO: Output data

—

I GND

I/O VDD

I GND

O Open

Reset input that re-initializes the LSI internal states. During a reset, the display

segments are turned off forcibly regardless of the internal display data. All

internal key data is reset to low and the key scan operation is disabled.

L I GND

However, serial data can be input during a reset.

Power supply connection. A supply voltage of between 4.5 and 6.0 V must be

provided.

58 Power supply ground connection. Must be connected to GND.

—

No. 4828-4/16

4페이지

LC75852E, 75852W

Display Data and Output Pin Correspondences

Output pin

S1/P1

S2/P2

S3/P3

S4/P4

S10

S11

S12

S13

S14

S15

S16

S17

S18

S19

S20

S21

S22

S23

S24

S25

S26

S27

S28

S29

S30

S31

S32

S33

S34

S35

S36

S37

S38

S39

S40

S41

S42

S43

KS1/S44

KS2/S45

COM1

D11

D13

D15

D17

D19

D21

D23

D25

D27

D29

D31

D33

D35

D37

D39

D41

D43

D45

D47

D49

D51

D53

D55

D57

D59

D61

D63

D65

D67

D69

D71

D73

D75

D77

D79

D81

D83

D85

D87

D89

COM2

D10

D12

D14

D16

D18

D20

D22

D24

D26

D28

D30

D32

D34

D36

D38

D40

D42

D44

D46

D48

D50

D52

D54

D56

D58

D60

D62

D64

D66

D68

D70

D72

D74

D76

D78

D80

D82

D84

D86

D88

D90

For example, the output states of output pin S11 are listed in the table below.

Display data

D21 D22

Output pin state

S11

Segment off for both COM1 and COM2

Segment on for COM2

Segment on for COM1

Segments on for both COM1 and COM2

No. 4828-7/16

7페이지

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관련 데이터시트

부품번호	상세설명 및 기능	제조사
LC75852E	Asynchronous Silicon Gate 1/2 Duty LCD Driver with On-Chip Key Input Function	Sanyo Semicon Device
LC75852E	Asynchronous Silicon Gate 1/2 Duty LCD Driver	ON Semiconductor