Page 1
35-BIT LED DISPLAY DRIVER
Part No: 80-08-00003
Type: PS045M
Microelectronics Business Division 2003.03 1 / 1
OPTO TECH CORPORATION
Tel: 886-3-5638951
Fax: 886-3-5783696
http://www.opto.com.tw
Since 1983
OPTO TECH
■
FEATURES
—
CMOS technology
—
Continuous brightness control
—
Serial data input
—
No LOAD signal required
—
Optional external data enable and reset
—
Wide power supply operation (3.5V to 12V)
— 34 or 35 outputs, 20mA sink capability
— Alphanumeric capability
■ APPLICATIONS
— Products with alphanumeric LED displays such as digital clock, counter,
radio, multimeter, etc.
— Industrial control indicator or instrumentation readout
— Relay driver
■ GENERAL DESCRIPTIONS
The PS045M is designed to drive either 4 or 5-digit, common anode alphanumeric
LED displays with the added benefit of requiring minimal interface with the
display or data source. Data is transferred serially via 2 signals: clock and
serial data. Data transfer without the added inconvenience of external LOAD
and RESET signal is accomplished by using a format of a leading "1" followed
by the allowed 35 data bits. Display brightness is determined by control of
the output current for LED displays. Typically, the output current is 36 times
greater that current flowing into the B.C. terminal.
■ DIE SIZE AND PAD ASSIGNMENT
6 :VD
D
5 :B.C.
4 :RESE
T
3 :OUT1
2 :OUT2
1 :OUT3
44:OUT4
42:OUT6
43:OUT5
41:VS
S
40:OUT7
38:OUT9
39:OUT8
37:OUT1
0
36:OUT1
1
35:OUT1
2
32:OUT1
5
31:OUT1
6
25:OUT2
1
26:OUT2
0
27:OUT1
9
30:OUT1
7
29:VS
S
28:OUT1
8
34:OUT1
3
33:OUT1
4
24:OUT2
2
23:OUT2
3
20:OUT2
6
21:OUT2
5
22:OUT2
4
17:OUT2
9
18:OUT2
8
19:OUT2
7
8 :DATA I
N
7 :CL
K
16:VS
S
14:OUT3
1
15:OUT3
0
13:OUT3
2
12:OUT3
3
10:OUT3
5
11:OUT3
4
9 :EN
B
1
2
3
4
5
6
7
8
9
1
0
1
1
1
2
1
3
1415161718192
0
2
1
2
2
2
3
2
4
2
5
2
6
2
7
2
8
2
9
3
0
3
1
3
2
3
3
3
4
3
5
3
6
3
7
3839404
1
4
2
4
3
4
4
PAD NAM
E
VDD
VSS
RESET
B.C
.
CLK
DATA IN
ENB
OUT
n
DESCRIPTION
Supply voltag
e
System ground
To reset all the internal registers
Brightness-control current inpu
t
Clock input to transfer serial data
Serial data input
To enable or disable serial data inpu
t
Constant sinking current output
2770um
2610um
Loading...