Sanyo LC7942YD Specifications

Ordering number: EN 6160

CMOS IC

LC7942YD

Dot-matrix LCD Driver

Overview

The LC7942YD is a common driver IC for driving large, dot–matrix LCD displays. It features a built–in 64–bit bidirectional shift register and a 4–level LCD driver. It can also be connected in cascade to increase the number of bits.

The LC7942YD is designed to be used with LC7940YD (QFP100) or LC7941YD (QFP100) segment drivers to drive large LCD panels.

Features

•64 built–in LCD display drive circuits

•l/64 to 1/128 display duty cycle

•Input/outputs for cascade connection

•Bias supply voltages can be supplied externally

•Operating supply voltage and ambient temperature

-2.7 to 5.5V logic supply (VDD) at Ta = –20 to +85 °C

-8 to 20 V LCD supply (VDD – VEE) at Ta = –20 to +85 °C

•CMOS process

•80–pin flat plastic package

Package Dimensions

unit: mm

3177–QFP80D
			[LC7942YD]
			23.2
			20.0		1.6
	0.8	0.8	0.35			0.15
	1.0	64			41
		65
					40
	0.8
17.2	14.0					15.6
	80				25
	1.6	1		24	2.45max	0.8
						2.15
			21.6		0.8
				SANYO : QFP80D (QIP80D)

■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

63099RM (ID) No. 6160—1/7

LC7942YD

Pad Layout (Top view)

O24	O23	O22	O21	O20	O19	O18	O17	O16	O15	O14	O13	O12	O11	O10	O9	O8	O7	O6	O5	O4	O3		O2		O1
64	63	62	61	60	59	58	57	56	55	54	53	52	51	50	49	48	47	46	45	44	43	42		41

O25		65
O26
		66
O27
		67
O28
		68
O29
		69
O30
		70
O31
		71
O32																							LC7942YD
		72
O33		73
O34
		74
O35
		75
O36
		76
O37
		77
O38
		78
O39
		79
O40
		80
	1				2		3		4		5		6		7		8		9		10		11		12		13		14		15		16		17		18
			O41		O42		O43		O44		O45		O46		O47		O48		O49		O50		O51		O52		O53		O54		O55		O56		O57		O58

40	DI01
39	NC
38	CP
37	NC
36	M
35	NC
34	VSS
33	RS/LS
32	VDD
31
	DISP OFF
30	V1
29	V2
28	V5
27	VEE
26	NC
25	DI064

19		20		21		22		23		24
O59		O60		O61		O62		O63		O64

Block Diagram

01

02

03

063

064

V1

VDD

V2

4 Level LCD Drive Circuit

V5

(64 bits)

VSS

VEE

Level Shifter (64 bits)

M

DISP OFF

Bidirectional

DIO64

DIO1

I/O

Shift Register

I/O

CP

(64 bits)

RS/LS

No. 6160—2/7

LC7942YD

Pin Functions

Number

Name

I/O

Function

32

VDD

VDD – Vss is the logic supply.

34

VSS

Supply

VDD – VEE is the LCD supply.

27

VEE

30

V1

LCD panel drive voltage supplies.

29

V2

Supply

V1 and VEE are selected levels.

V2 and V5 are not–selected levels.

28

V5

38

CP

I

Display data input clock (falling–edge trigger).

40

DIO1

I/O

RS/LS

DIO1

DIO64

Shift direction

25

DIO64

I/O

LOW (rlght shift)

Input

Output

O1

O64

33

RS/LS

I

HIGH (left shift)

Output

Input

O64

O1

36

M

I

LCD panel drive voltage output alternation control signal.

31

I

O1 to O64 output control input pins.

DISP OFF

LCD drive outputs

The output drive level is determined by the display data, M signal and

input as show below.

DISPOFF

41 to 80

O1 to O40

M

Q

DISPOFF

Output

LOW

LOW

HIGH

V2

O

LOW

HIGH

HIGH

VEE

HIGH

LOW

HIGH

V5

HIGH

HIGH

HIGH

V1

1 to 24

O41 to O64

×

×

LOW

V1

Note

× = don’t care (tied HIGH or LOW)

26

NC

35

NC

–

No connection.

37

NC

39

NC

Specifications

Absolute Maximum Ratings at Ta = 25 ±2°C, V SS = 0 V

Parameter

Symbol

Ratings

Unit

Logic supply voltage

VDD max

–0.3 to +7.0

V

LCD supply voltage. See note.

VDD – VEE max

0 to 22

V

Input voltage

VI max

–0.3 to VDD + 0.3

V

Operating temperature range

Topr

–20 to +85

°C

Storage temperature range

Tstg

–40 to +125

°C

Note

VDD ≥ V1 > V2 >V5 > VEE

No. 6160—3/7