LTM-8522G - Lite-On Electronics, Inc.

9-205

DISPLAYS

0.56" 7-Segment Numeric LED

Displays With MOS I.C. Driver

LTM-8500 Series

Package Dimensions

A. LTM-8522

Features

0.56 inch (14.22mm) digit height.

Wide supply voltage operation.

Serial data input.

Constant Current drivers.

Continuous brightness control.

Solid state reliability-long operation life.

Wide viewing angle.

Choices of five bright colors/bright red/green/yellow/

red orange/high efficiency red.

TTL compatible.

Description

The LTM-8500 series are 0.56 inch (14.22mm) numeric

display modules, and a built-in M5450 MOS integrated

circuits. The integrated circuit contains serial data input,

35 bits shift register. 34 LED driver output and a bright-

ness control.

The bright red yellow and green devices utilize LED

chips which are made from GaP on a transparent GaP

substrate. The red orange and high efficiency red de-

vices utilize LED chips which are made from GaAsP on

a transparent GaP substrate. The MOS integrated cir-

cuits are produced with N-channel silicon gate

technology.

Bright red displays have black face and red segments.

Green and yellow displays have gray face and white

segments. Red orange displays have orange face and

orange segments. High efficiency red displays have

red face and red segments.

B. LTM-8529

C. LTM-8530

Notes: All dimensions are in millimeters (inches)

Tolerance : 0.25mm (0.010") unless other-

wise noted.

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9-206

Part No. LTM-

Hi.-Eff. Red

3 Digit, Rt. Hand Decimal

11/2 Digit, Rt. Hand Decimal

2 Digit, Rt. Hand Decimal

8522HR

8529HR

8530HR

Green

8522G

8529G

8530G

Pockage

Dimension

Description

A

B

C

Devices

Red Orange

8522E

8529E

8530E

Bright Red

8522P

8529P

8530P

Pin Connection

LTM-8522

Vss

VLED

Bit 25 Output

Bit 26 Output

Bit 27 Output

Bit 28 Output

Bit 29 Output

Bit 30 Output

Bit 31 Output

Bit 32 Output

Bit 33 Output

Bit 34 Output

Data Enable

Data Input

Clock Input

VDD

BRT. Control

Pin No.

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

Connection

Yellow

8522Y

8529Y

8530Y

LTM-8529

Vss

VLED

No Pin

Bit 15 Output

Bit 16 Output

Bit 17 Output

Bit 18 Output

Bit 19 Output

Bit 20 Output

Bit 21 Output

Bit 22 Output

Data Enable

Data Input

Clock Input

VDD

BRT. Control

LTM-8530

Vss

VLED

No Pin

Bit 17 Output

Bit 18 Output

Bit 19 Output

Bit 20 Output

Bit 21 Output

Bit 22 Output

Bit 23 Output

Bit 24 Output

Data Enable

Data Input

Clock Input

VDD

BRT. Control

Absolute Maximum Ratings at Ta=25

SymbolParameter

Supply Voltage*1

Input Voltage

Off State Output Voltage

LED Supply Voltage

Power Dissipation of IC*2

Supply Current

Operating Temperature Range

Storage Temperature Range

VDD

VI

VO(off)

VLED

PD(IC)

IDD

Top

Tstg

Min.

-0.3

2.8

-20

Max.

12

3.5

335

8.5

+60

Unit

V

mW

mA

Note : 1. All voltages are with respect to Vss(GND)

2. Power dissipation of IC is given by PD=(VLED-VF)(IF)(No. of Segments)+(8.5mA) (VDD)

*VF is LED forward voltage.

Solder Temperature 1/16 Inch Below Seating Plane for 3 Seconds at 260

9-207

DISPLAYS

Recommended Operating Condition at Ta=25

Electrical/Optical Characteristics at Ta=25

LTM-8522P/8529P/8530P

SymbolParameter

Supply Voltage

Input Voltage

Logical 0 Level

Logical 1 Level

Brightness Input Current

Brightness Input Voltage

Off State Voltage

Output Sink Current

Segment Off

Segment On

Input Clock Frequency

Output Matching

VDD

VI

IB

VB

VO(off)

FCLOCK

IO

Min.

4.75

-0.3

2.2

VDD -2

0

3

0

Typ.

3

6

Max.

11

0.8

VDD

0.75

4.3

11

10

0.5

20

Unit

V

mA

V

A

mA

MHZ

%

Test Condition

10 A Input Bias

4.75V<VDD<5.25V

VDD>5.25V

Input Current =750 A

IF=0 A

IB=100 A

IF=200 A

LTM-8522G/8529G/8530G

LTM-8522Y/8529Y/8530Y

SymbolParameter

Average Luminous Intensity

Peak Emission Wavelength

Spectral Line Half-Width

Dominant Wavelength

Luminous Intensity Matching Ratio

IV

P

d

IV-m

Min.

320

Typ.

950

697

90

657

Max.

2:1

Unit

cd

nm

Test Condition

IB=0.4mA

IF=20mA

IB=0.4mA

SymbolParameter

Average Luminous Intensity

Peak Emission Wavelength

Spectral Line Half-Width

Dominant Wavelength

Luminous Intensity Matching Ratio

IV

P

d

IV-m

Min.

800

Typ.

2400

565

30

569

Max.

2:1

Unit

cd

nm

Test Condition

IB=0.4mA

IF=20mA

IB=0.4mA

SymbolParameter

Average Luminous Intensity

Peak Emission Wavelength

Spectral Line Half-Width

Dominant Wavelength

Luminous Intensity Matching Ratio

IV

P

d

IV-m

Min.

800

Typ.

2400

585

35

588

Max.

2:1

Unit

cd

nm

Test Condition

IB=0.4mA

IF=20mA

IB=0.4mA

LTM-8522E/8529E/8530E

SymbolParameter

Average Luminous Intensity

Peak Emission Wavelength

Spectral Line Half-Width

Dominant Wavelength

Luminous Intensity Matching Ratio

IV

P

d

IV-m

Min.

800

Typ.

2400

630

40

621

Max.

2:1

Unit

cd

nm

Test Condition

IB=0.4mA

IF=20mA

IB=0.4mA

9-208

LTM-8522HR/8529HR/8530HR

Note: Luminous intensity is measured with a light sensor and filter combination that approximates the CIE (Commision

Internationale De L’Eclairage) eye-response curve.

SymbolParameter

Average Luminous Intensity

Peak Emission Wavelength

Spectral Line Half-Width

Dominant Wavelength

Luminous Intensity Matching Ratio

IV

P

d

IV-m

Min.

800

Typ.

2400

635

40

623

Max.

2:1

Unit

cd

nm

Test

Condition

IB=0.4mA

IF=20mA

IB=0.4mA

Functional Description

Serial data transfer from the data source to the display driver is accomplished with 2 signals serial data and clock.

Using a format of a leading "1" followed by the 35 data bits allow data transfer without an additional load signal.

The 35 data bits are latched after the 36th bit is completed, thus providing non multiplexed, direct drive to the display.

Outputs change only if the serial data bits differ from the previous time.

Brightness of display is determined by control the output current of LED display. A 1nF capacitor should be connected

to brightness control, Pin 7 to prevent possible oscillations. The output current is typically 25 times greater than the

current into Pin 7 which is set by an external variable resistor. There is an internal limiting resistor of 400 nominal

value.

Figure 1 shows the input data format. A start bit of logical "1" preceed the 35 bits of data. At the 36th clock, a LOAD

signal is generated synchronously with the high state of the clock, which loads the 35 bits of the shift registers into

the latches. At the low state of the clock a RESET signal is generated which clears all the shift registers for the next

set of data . The shift registers are static master-slave configuration. There is no clear for master portion of the first

register, thus allowing continuous operation.

There must be a complete set of 36 clocks or the shift registers won't clear. When power is first applied to the chip,

an internal power ON, a reset signal is generated which reset all registers and all latches. The START bit and first

clock return the chip on its normal operation. Bit 1 is the first following the start bit and it will appear on the segment

A of the digit 1. A logical "1" at the input will turn on the appropriate LED. Figure 2 shows the timing relationship

between data, clock, and DATA ENABLE. A max. clock frequency of 0.5MHz is assumed.

Figure 1. Internal Block Diagram Figure 2. Input Data Format

9-209

DISPLAYS

Table I Serial Data Input Sequence

Bit

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

LTM-8522 LTM-8529 LTM-8530

Digit Segment Digit Segment Digit Segment

1

2

3

A

B

C

D

E

F

G

D.P.

A

B

C

D

E

F

G

D.P.

A

B

C

D

E

F

G

D.P.

Pin 4

Pin 5

Pin 6

Pin 7

Pin 8

Pin 9

Pin 10

Pin 11

Pin 12

Pin 13

1

2

1

2

B

C

G

H

J

D.P.

A

B

C

D

E

F

G

D.P.

Pin 6

Pin 7

Pin 8

Pin 9

Pin 10

Pin 11

Pin 12

Pin 13

No Connection

A

B

C

D

E

F

G

D.P.

A

B

C

D

E

F

G

D.P.

Pin 6

Pin 7

Pin 8

Pin 9

Pin 10

Pin 11

Pin 12

Pin 13

No Connection

Figure 3. Timing Relationship

9-210

Typical Application

A. 1 1/2 DIGIT DISPLAY B. 2 DIGIT DISPLAY

C. 2 1/2 DIGIT DISPLAY D. 3 DIGIT DISPLAY

E. 3 1/2 DIGIT DISPLAY F. 4 DIGIT DISPLAY

NOTES:1.Clean only in water,isopropanol, ethanol,freon TF(or equivalent).

2.Luminous intensity is measured with a light sensor and filter combination thar approximates the CIE

(Commision lnternationale De L'Eclairage)eye-response curve.

16-m8500.p65 2000/7/11, ¤U¤È 07:34Page 210 Adobe PageMaker 6.5C/Win