
ST2225A
點(diǎn)晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
LED Display Driver
-5-
Version
:
A.025
Absolute Maximum Ratings
Voltage (any pin)........................Vss to Vss +12V
Power Dissipation (P
D
)
+25
℃
......................................................1.52W
+85
℃
....................................................790mW
Junction Temperature (Tj)........................+150
℃
Storage Temperature (Ts)..........-65
℃
to +
150
℃
Lead Temperature (soldering, 10 sec.).....+300
℃
Electrical Characteristics
4.5V
≦
V
DD
≦
11V, Vss=0V; T
A
=25
℃
, bold values indicate -40
℃≦
T
A
≦
+85
℃;
unless noted
Symbol
Parameter
Condition
Min
Typ
Max
5
6
0.8
V
DD
V
0.75
10
10
4
25
4.3
±
2
0
500
Units
m A
m A
V
V
V
m A
μ
A
μ
A
m A
m A
V
%
kHz
ns
ns
ns
ns
ns
I
DD
Power Supply Current
-25
℃
to +85
℃
, excluding output loads
-40
℃
to +85
℃
, excluding output loads
logic-0 level,
±
10
μ
A input bias
logic-1 level, 4.75V
≦
V
DD
≦
5.25V
logic-1 level,
V
DD
>5.25V
Note 2
V
IL
Low-level Data Input Voltage
-0.3
2.2
V
0
V
IH
High-level Data Input Voltage
DD
-2
DD
I
BC
Brightness Control Input Current
I
OUT OFF
Output Sink Current When “OFF” Segment off, V
OUT
=3.0V
I
OUT ON
Output Sink Current When “ON”
Segment on, V
OUT
=1.0V, Note 3
Brightness input =0
μ
A
Brightness input =100
μ
A
Brightness input =750
μ
A
Input Current =750
μ
A
Note 1
Notes 4, 5
Notes 4, 5
Notes 4, 5
0
2.0
15
3.0
950
950
300
300
100
2.7
20
V
BC
R
MATCH
Output Matching
f
C
Clock Input Frequency
t
H
Clock Input High Time
t
L
Clock Input Low Time
t
DS
Data Input Setup Time
t
DH
Data Input Hold Time
t
DES
Data Enable Input Setup Time
Brightness Control Input Voltage
Note 1: Output matching is calculated as the percent variation (I
MAX
+ I
MIN
) / 2
Note 2: With a fixed resistor on the brightness input pin, some variation in brightness will occur among devices.
Note 3: V
OUT
should be so regulated that power dissipation of the chip will not exceed its limit.
Note 4: AC input waveform specification for test purpose: t
R
≦
20ns, t
F
≦
20ns, t=500kHz, 50%
±
10% duty cycle.
Note 5: Clock input rise and fall times must not exceed 300ns.