LightKey

SPEC NO: DS10121720

REV: A.4

CHECKED: Emily Zhou

APPROVED: M.H. Lin

PAGE: 2/3

HTTP://WWW.DISPLAY-LEDS.COM

TEL: 0086-574-86322282

DATE: Jul/20/2011

Datasheet of 0.56 inch Four Digit 7 Segment LED Display

Internal Circuit Diagram

LD5644A (Common Cathode)

11

7

4

2

1

10

5

3

A BC D E F

G D 1

12

A B CDE F

G D2 D 5 D 6

9

ABC D E F

G D3

8

A B CDE F

G D4

6

2

.

G

I

D

1

.

G

I

D

DI G. 3

DI G. 4

LD5644B (Common Anode)

A BC D E F

G D 1 A B CDE F

G D2 D 5 D 6 ABC D E F

G D3 A B CDE F

G D4

2

.

G

I

D

1

.

G

I

D

DI G. 3

DI G. 4

11

7

4

2

1

10

5

3

12

9

8

6

Selection Guide

Four Digit 7 Segment LED Display, Digit Height:14.20mm(0.56 inch), External Dimensions:

50.50x19.00x8.00mm (L x W x H )

Part No.

Chip

One Seg

One DP

Common

Cathode

Common

Anode

Material

Color

WLD

Min.

Typ.

Min.

Typ.

LD5644AR

LD5644BR

GaAlAs

Super Red

640

8

10

8

10

LD5644AD

LD5644BD

GaAlAs

Hi-Red

640

18

25

18

25

LD5644AO

LD5644BO

GaAsP

Orange

625

7

9

7

9

LD5644AY

LD5644BY

GaAsP

Yellow

588

8

10

8

10

LD5644AG

LD5644BG

GaP

Green

568

7

9

7

9

LD5644AUR

LD5644BUR

AlGaInP

Ultra Red

640

30

45

30

45

LD5644AUO

LD5644BUO

AlGaInP

Ultra Orange

625

45

60

45

60

LD5644AUA

LD5644BUA

AlGaInP

Ultra Amber

605

30

45

30

45

LD5644AUY

LD5644BUY

AlGaInP

Ultra Yellow

595

30

45

30

45

LD5644AUG

LD5644BUG

AlGaInP

Ultra Green

573

30

45

30

45

LD5644APG

LD5644BPG

InGaN

Pure Green

525

120

300

120

300

LD5644AUB

LD5644BUB

InGaN

Ultra Blue

470

30

45

30

45

LD5644AUW

LD5644BUW

InGaN

Ultra White

\

100

120

100

120

Unit:

\

\

\

nm

mcd

mcd

mcd

mcd