CMOS DOT MATRIX LCD DRIVER
IZD1520
1
FEATURES
CMOS LSI chips
Connection with CPU
Can be directly coupled with 80-port or 68-port system
Available in chip form or in 100-pin plastic QFP
Pin-to-Pin Replacement for SED1520 Series
Many command set
Total 80 (segment+common) drive sets
Low power consumption - 30
W maximum at 2kHz
external clock
Power supply V
DD
- V
SS
: 2.4 to -7.0V
V
DD
- V
5
: 3.5 to -13.0V
DESCRIPTION
The IZD1520 family of dot matrix LCD (Liquid Crystal Display) drivers are designed for the display of characters and graphics.
The drivers generate LCD drive signals derived from bit mapped data stored in an internal RAM.
The IZD1520 family drivers incorporate innovative circuit design strategies to achieve very low power dissipation at a wide range of operating voltages.
These features give the designer a flexible means of implementing small to medium size LCD displays for compact, low power systems.
The IZD1520 which is able to drive two lines of twelve characters each.
The IZD1521 which is able to drive 80 segments for extension.
ABSOLUTE MAXIMUM RATINGS
Characteristic
Symbol
Value
Unit
Supply Voltage (1)
V
SS
- 8.0 ~ 0.3
V
Supply Voltage (2)
V
5
- 16.5 ~ 0.3
V
Supply Voltage (3)
V
1,
V
2,
V
3,
V
4
V
5
~ 0.3
V
Input Voltage
V
I
V
SS
- 0.3 ~ 0.3
V
Output Voltage
V
O
V
SS
- 0.3 ~ 0.3
V
Power Dissipation
P
D
250
mW
Operating Temperature
T
a
- 10 ~ + 75
o
C
Storage Temperature
T
stg
- 65 ~ + 150
o
C
Soldering temperature time (10 sec max)
T
sol
260
o
C
Notes:
1.
All voltages are specified relative to V
DD
= 0V.
2.
The following relation must be always hold
V
DD
V
1
V
2
V
3
V
4
V
5
.
3.
Exceeding the absolute maximum ratings may cause permanent damage to the device. Functional operating under these
conditions is not implied.
LINE-UP
Product
Name
Clock Frequency
Applicable Driver
Number of
SEGMENT
Drivers
Number of
COMMON
Drivers
Duty
On-chip
External
IZD1520
OA
18kHz
18kHz
IZD1520
OA
, IZD1521
OA
61
16
1/16, 1/32
IZD1521
OA
-
18kHz
IZD1520
OA
80
0
1/8 ~ 1/32
IZD1520
AA
-
2kHz
IZD1520
AA
, IZD1521
AA
61
16
1/16, 1/32
IZD1521
AA
-
2kHz
IZD1520
AA
80
0
1/8 ~ 1/32
CMOS DOT MATRIX LCD DRIVER
IZD1520
2
BLOCK DIAGRAM IZD1520
AA
D isp lay d ata R A M
(2560-b it)
D isp lay d ata latch circu it
C om m on cou n ter
L C D d riv e circu it
C olu m n ad d ress d ecod er
C olu m n ad d ress cou n ter
C olu m n ad d ress reg ister
S tatu s
C om m an d
d ecod er
D isp lay
tim in g
g en erator
circu it
Lo
w
-
a
d
d
r
e
s
s
re
g
i
st
e
r
Bu
s
ho
l
d
e
r
M P U in terface
D-
D
07
A0
,
CS
RD
,
RW
(E
,
RW
)
M/
S
RE
S
C L
F R
Li
ne
a
ddr
e
s
s
de
c
o
de
r
Li
ne
c
o
u
n
t
e
r
Di
sp
l
ay
s
t
a
r
t
l
in
e
r
e
g
i
st
e
r
I/
O
b
u
ffe
r
V
DD
V
SS
SE
G
t
o
S
E
G
06
0
CO
M
t
o
CO
M
01
5
V,
V,
V,
V,
V
12
34
5
CMOS DOT MATRIX LCD DRIVER
IZD1520
3
BLOCK DIAGRAM IZD1520
OA
D isp lay d ata R A M
(2560-b it)
D isp lay d ata latch circu it
C om m on cou n ter
L C D d riv e circu it
C olu m n ad d ress d ecod er
C olu m n ad d ress cou n ter
C olu m n ad d ress reg ister
S tatu s
C om m an d
d ecod er
D isp lay
tim in g
g en erator
circu it
Lo
w
-
a
d
d
r
e
s
s
re
g
i
st
e
r
Bu
s
ho
l
d
e
r
M P U in terface
D-
D
07
OS
C
1
RD
,
RW
(E
,
RW
)
M/
S
RE
S
O S C 2
F R
Li
ne
a
ddr
e
s
s
de
c
o
de
r
Li
ne
c
o
u
n
t
e
r
Di
sp
l
ay
s
t
a
r
t
l
in
e
r
e
g
i
st
e
r
I/
O
b
u
ffe
r
V
DD
V
SS
SE
G
t
o
S
E
G
06
0
CO
M
t
o
CO
M
01
5
V,
V,
V,
V,
V
12
34
5
CMOS DOT MATRIX LCD DRIVER
IZD1520
4
BLOCK DIAGRAM IZD1521
AA,
IZD1521
OA
D isp lay d ata R A M
(2560-b it)
D isp lay d ata latch circu it
L C D d riv e circu it
C olu m n ad d ress d ecod er
C olu m n ad d ress cou n ter
C olu m n ad d ress reg ister
S tatu s
C om m an d
d ecod er
D isp lay
tim in g
g en erator
circu it
Lo
w
-
a
d
d
r
e
s
s
re
g
i
st
e
r
Bu
s
ho
l
d
e
r
M P U in terface
D-
D
07
A0
,
CS
RD
,
RW
(E
,
RW
)
RE
S
C L
F R
Li
ne
a
ddr
e
s
s
de
c
o
de
r
Li
ne
c
o
u
n
t
e
r
Di
sp
l
ay
s
t
a
r
t
l
in
e
r
e
g
i
st
e
r
I/
O
b
u
ffe
r
V
DD
V
SS
SE
G
t
o
S
E
G
07
9
V
23
5
,
V,
V
CMOS DOT MATRIX LCD DRIVER
IZD1520
5
ELECTRICAL CHARACTERISTICS
(Ta = 25
o
C, V
DD
= 0V, V
SS
= -5.0V unless otherwise specified)
Characteristic
Symbo
l
Test Condition
Applicable Terminals
Min
Typ
Max
Unit
Operating
Recommended
-5.5
-5.0
-4.5
Voltage(1)
Note 1
V
SS
V
SS
-7.0
-2.4
V
Recommended
V
5
V
5
-13.0
-3.5
Operating
-13.0
V
Voltage(2)
Permitted
V
1
, V
2
V
1
, V
2
0.6 x V
5
V
DD
Permitted
V
3
, V
4
V
3
, V
4
V
5
0.4xV
5
HIGH Input Voltage
V
IH
A0,Di, E, R/W, CS
V
SS
+2.0
V
DD
V
CL, FR, M/S, RES
0.2 x V
SS
V
DD
LOW Input Voltage
V
IL
A0, Di, E, R/W, CS
V
SS
V
SS
+0.8
V
CL, FR, M/S, RES
V
SS
0.8+V
SS
I
OH
= -3.0 mA
D0
D7
V
SS
+2.4
HIGH Output Voltage
V
OH
I
OH
= -2.0 mA
FR
V
SS
+2.4
V
I
OH
= -120
A
OSC2
0.2 x V
SS
I
OL
= 3.0 mA
D0
D7
V
SS
+0.4
LOW Output Voltage
V
OL
I
OL
= 2.0 mA
FR
V
SS
+0.4
V
I
OL
= 120
A
OSC2
0.8xV
SS
Input Leakage Current
I
LI
A0, E, R/W, CS, CL,
M/S, RES
-1.0
1.0
A
Output Leakage Current
I
LO
Outputs are high impedance
D0
D7, FR
-3.0
3.0
A
LCD Driver ON Resistance
R
ON
V
5
=-5.0V
SEG0 ~ SEG79
5.0
7.5
K
Note 2
COM0 ~ COM15
Supply Current, Static
I
DDQ
CS = CL = V
DD
V
DD
0.05
1.0
A
During
f
CL
=2kHz
Note 3
2.0
5.0
display
V
5
=-5.0V
R
f
=1M
Note 4
V
DD
9.5
15.0
A
Supply Current, Dynamic
I
DD
f
CL
=18KHz
Note 5
5.0
10.0
During access f
cyc
=200KHz
300
500
A
Input Terminal Capacity
C
IN
f = 1 MHz
All inputs
5.0
8.0
pF
Oscillator Frequency
f
OSC
R
f
=1M
2%
15
18
21
KHz
Reset Time
t
R
RES
1.0
1000
s
Notes: 1. Operating over the specified voltage range is guaranteed, except where the supply voltage changes suddenly during
CPU access.
2. For a voltage differential of 0.1V between input (V
1
, ..., V
4
) and output (COM, SEC) pins. All voltages within specified
operating voltage range.
3.
IZD1520
AA
and IZD1521
AA
only. Does not include transient currents due to stray and panel capacitances.
4.
IZD1521
OA
only. Does not include transient currents due to stray and panel capacitances.
5.
IZD1520
OA
only. Does not include transient currents due to stray and panel capacitances.
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