IZD1520U
DOT MATRIX LIQUID CRYSTAL DISPLAY CONTROLLER &
DRIVER
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 - 30µW 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 extention.
ABSOLUTE MAXIMUM RATINGS
Characteristic
Supply Voltage (1)
Supply Voltage (2)
Supply Voltage (3)
Input Voltage
Output Voltage
Power Dissipation
Operating Temperature
Storage Temperature
Soldering temperature time (10 sec
max)
Symbol
V
SS
V
5
V
1,
V
2,
V
3,
V
4
V
I
V
O
P
D
T
a
T
stg
T
sol
Value
- 8.0 ~ 0.3
- 16.5 ~ 0.3
V
5
~ 0.3
V
SS
- 0.3 ~ 0.3
V
SS
- 0.3 ~ 0.3
250
- 10 ~ + 75
- 65 ~ + 150
260
Unit
V
V
V
V
V
mW
o
o
o
C
C
C
Notes:
1.
2.
All voltages are specified relative to V
DD
= 0V.
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.
1
IZD1520U
BLOCK DIAGRAM IZD1521
AA,
IZD1521
OA
SEG
0
to SEG
79
V
2
,V
3
,V
5
V
DD
Status
RD,RW
(E,RW)
RES
LCD drive circuit
Display data latch circuit
Display start line register
Line address decoder
Line counter
Display data RAM
(2560-bit)
Column address decoder
CL
FR
Column address register
MPU interface
D
0
-D
7
ELECTRICAL CHARACTERISTICS
(Ta = 25
o
C, V
DD
= 0V, V
SS
= -5.0V unless otherwise specified)
4
A0,CS
Bus
holder
Command
decoder
Low-address
register
Display
timing
generator
circuit
Column address counter
I/O buffer
V
SS
IZD1520U
Characteristic
Operating
Voltage(1)
Note 1
Recommended
Operating
Voltage(2) Permitted
Permitted
HIGH Input Voltage
V
1
, V
2
V
3
, V
4
V
IH
V
1
, V
2
V
3
, V
4
A0,Di, E, R/W, CS
CL, FR, M/S, RES
LOW Input Voltage
V
IL
I
OH
= -3.0 mA
HIGH Output Voltage
V
OH
I
OH
= -2.0 mA
I
OH
= -120
µA
I
OL
= 3.0 mA
LOW Output Voltage
Input Leakage Current
Output Leakage Current
LCD Driver ON Resistance
Note 2
Supply Current, Static
I
DDQ
CS = CL = V
DD
During
display
V
5
=-5.0V
Supply Current, Dynamic
I
DD
f
CL
=2kHz
Note 3
R
f
=1MΩ
Note 4
f
CL
=18KHz
Note 5
During access
f
cyc
=200KHz
f = 1 MHz
R
f
=1MΩ±2%
RES
5.0
300
All inputs
15
1.0
5.0
18
10.0
500
8.0
21
1000
µA
pF
KHz
µs
V
DD
V
OL
I
LI
I
LO
R
ON
Outputs are high imped-
ance
V
5
=-5.0V
I
OL
= 2.0 mA
I
OL
= 120µA
A0, Di, E, R/W, CS
CL, FR, M/S, RES
D0
÷
D7
FR
OSC2
D0
÷
D7
FR
OSC2
A0, E, R/W, CS, CL,
M/S, RES
D0
÷
D7, FR
SEG0 ~ SEG79
COM0 ~ COM15
V
DD
0.05
2.0
9.5
1.0
5.0
15.0
µA
µA
-1.0
-3.0
5.0
V
5
V
5
-13.0
-13.0
0.6 x V
5
V
5
V
SS
+2.0
0.2 x V
SS
V
SS
V
SS
V
SS
+2.4
V
SS
+2.4
0.2 x V
SS
V
SS
+0.4
V
SS
+0.4
0.8xV
SS
1.0
3.0
7.5
µA
µA
KΩ
V
V
V
DD
0.4xV
5
V
DD
V
DD
V
SS
+0.8
0.8+V
SS
V
V
-3.5
V
Recommended
V
SS
V
SS
Symbol
Test Condition
Applicable Termi-
nals
Min
-5.5
-7.0
Typ
-5.0
Max
-4.5
-2.4
V
Unit
Input Terminal Capacity
Oscillator Frequency
Reset Time
Notes: 1.
C
IN
f
OSC
t
R
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.
IZ1520
AA
and IZ1521
AA
only. Does not include transient currents due to stray and panel capacitances.
4.
IZ1521
OA
only. Does not include transient currents due to stray and panel capacitances.
5.
IZ1520
OA
only. Does not include transient currents due to stray and panel capacitances.
5
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