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
0.35
21.6
17.2
14.0
1.6
0.8 0.8
64
1.0
65
0.8
80
124
1.6
40
25
2.45max
0.8
0.15
15.6
0.8
2.15
41
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
Pad Layout (Top view)
O24
O23
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
O26
O27
O28
O29
O30
O31
O32
O33
O34
O35
O36
O37
O38
O39
O40
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
1234567891011121314151617181920212223
O22
O21
O20
O19
O18
O17
LC7942YD
O16
O15
O14
LC7942YD
O13
O12
O11
O10O9O8O7O6O5O4O3O2
O1
40
DI01
39
NC
38
CP
37
NC
36
M
35
NC
34
33
32
31
30
29
28
27
26
25
24
SS
V
RS/LS
DD
V
DISP OFF
V1
V2
V5
EE
V
NC
DI064
Block Diagram
O41
O42
VEE
DISP OFF
DIO1
CP
O43
V1
V2
V5
M
O44
O45
O46
O47
O48
O49
O50
01 02 03 063 064
4 Level LCD Drive Circuit
(64 bits)
Level Shifter (64 bits)
Bidirectional
Shift Register
(64 bits)
O51
O52
O53
O54
I/OI/O
O55
O56
O57
V
V
DIO64
RS/LS
DD
SS
O58
O59
O60
O61
O62
O63
O64
No. 6160—2/7
LC7942YD
Pin Functions
Number Name I/O Function
32 V
34 V
27 V
30 V
29 V
28 V
38 CP I Display data input clock (falling–edge trigger).
40 DIO1 I/O
25 DIO64 I/O
33 RS/LS I
36 M I LCD panel drive voltage output alternation control signal.
31 DISP OFF I O1 to O64 output control input pins.
41 to 80
1 to 24 O41 to O64
26 NC
35 NC
37 NC
39 NC
DD
SS
EE
1
2
5
O1 to O40
– Vss is the logic supply.
V
Supply
DD
VDD – VEE is the LCD supply.
LCD panel drive voltage supplies.
Supply
V1 and VEE are selected levels.
V2 and V5 are not–selected levels.
LOW (rlght shift) Input
HIGH (left shift) Output
LCD drive outputs
The output drive level is determined by the display data, M signal and DISPOFF input as show below.
O
Note
×
= don’t care (tied HIGH or LOW)
– No connection.
RS/LS DIO1
M Q DISPOFF Output
LOW LOW HIGH V
LOW HIGH HIGH V
HIGH LOW HIGH V
HIGH HIGH HIGH V
××
DIO64 Shift direction
Output O1
O64
Input O64 O1
2
EE
5
1
LOW V
1
Specifications
Absolute Maximum Ratings at Ta = 25 ±2°C, V
Parameter Symbol Ratings Unit
Logic supply voltage VDD max –0.3 to +7.0
LCD supply voltage. See note. VDD – VEE max 0 to 22
Input voltage VI max –0.3 to VDD + 0.3
Operating temperature range T
Storage temperature range T
Note
V
≥ V1 > V2 >V5 > V
DD
EE
= 0 V
SS
opr
stg
–20 to +85
–40 to +125
V
V
V
°C
°C
No. 6160—3/7
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