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

: V D D

5

: B . C .

4

: R E S E T

3

: O U T 1

2

: O U T 2

1

: O U T 3

4 4 : O U T 4

4 2 : O U T 6

4 3 : O U T 5

4 1 : V S S

4 0 : O U T 7

3 8 : O U T 9

3 9 : O U T 8

3 7 : O U T 1 0

3 6 : O U T 1 1

3 5 : O U T 1 2

3 2 : O U T 1 5

3 1 : O U T 1 6

2 5 : O U T 2 1

2 6 : O U T 2 0

2 7 : O U T 1 9

3 0 : O U T 1 7

2 9 : V S S

2 8 : O U T 1 8

3 4 : O U T 1 3

3 3 : O U T 1 4

2 4 : O U T 2 2

2 3 : O U T 2 3

2 0 : O U T 2 6

2 1 : O U T 2 5

2 2 : O U T 2 4

1 7 : O U T 2 9

1 8 : O U T 2 8

1 9 : O U T 2 7

8

: D A T A

I N

7

: C L K

1 6 : V S S

1 4 : O U T 3 1

1 5 : O U T 3 0

1 3 : O U T 3 2

1 2 : O U T 3 3

1 0 : O U T 3 5

1 1 : O U T 3 4

9

: E N B

1

2

3

4

5

6

7

8

9

1 0

1 1

1 2

1 3

1 4

1 5

1 6

1 7

1 8

1 9

2 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

3 8

3 9

4 0

4 1

4 2

4 3

4 4

P A D

N A M E

V D D

V S S

R E S E T

B . C .

C L K

D A T A

I N

E N B

O U T n

D E S C R I P T I O N

S u p p l y

v o l t a g e

S y s t e m

g r o u n d

T o

r e s e t

a l l

t h e

i n t e r n a l

r e g i s t e r s

B r i g h t n e s s - c o n t r o l

c u r r e n t

i n p u t

C l o c k

i n p u t

t o

t r a n s f e r

s e r i a l

d a t a

S e r i a l

d a t a

i n p u t

T o

e n a b l e

o r

d i s a b l e

s e r i a l

d a t a

i n p u t

C o n s t a n t

s i n k i n g

c u r r e n t

o u t p u t

2770um

2610um