LITE-ON TECHNOLOGY CORPORATION

P r o p e r t y o f L i t e - O n O n l y

Features

* Meet ROHS, Green Product.
* Dual color chip LED.
* Ultra bright AlInGaP Chip LED.
* Package in 8mm tape on 7" diameter reels.
* Compatible with automatic placement equipment.
* Compatible with infrared and vapor phase reflow solder process.
* EIA STD package.
* I.C. compatible.

Package Dimensions

Devices

Part No.

Lens

Source Color

Pin Assignment

AlInGaP Green

1,3

LTST-C155KGJRKT Water

Clear

AlInGaP Red

2,4

Notes:
1. All dimensions are in millimeters (inches).
2. Tolerance is ± 0.10 mm (.004") unless otherwise noted.

Part No. : LTST-C155KGJRKT

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BNS-OD-C131/A4

LITE-ON TECHNOLOGY CORPORATION

P r o p e r t y o f L i t e - O n O n l y

Absolute Maximum Ratings At Ta=25°C

LTST-C155KGJRKT

Parameter

Green Red

Unit

Power Dissipation

Peak Forward Current
(1/10 Duty Cycle, 0.1ms Pulse Width)

80 80

DC Forward Current

Derating Linear From 25

C 0.4

0.4

mA/

Reverse Voltage

Operating Temperature Range

-55

C to + 85

Storage Temperature Range

-55

C to

Wave Soldering Condition

260

C For 5 Seconds

Infrared Soldering Condition

260

C For 5 Seconds

Vapor Phase Soldering Condition

215

C For 3 Minutes

Part No. : LTST-C155KGJRKT

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BNS-OD-C131/A4

LITE-ON TECHNOLOGY CORPORATION

P r o p e r t y o f L i t e - O n O n l y

Electrical / Optical Characteristics At Ta=25°C

LTST-C155KGJRKT

Parameter

Symbol

Green Red

Unit

Test Condition

MIN.

18.0 18.0

TYP.

35.0 45.0

Luminous Intensity

MAX.

mcd

IF =20mA

Note 1

Viewing Angle

1/2

TYP.

130 130

deg

Note 2 (Fig.6)

Peak Emission Wavelength

TYP.

574 639

Measurement

@Peak (Fig.1)

Dominant Wavelength

TYP.

571 631

IF =20mA

Note 3

Spectral Line Half-Width

TYP.

15 20

TYP.

2.0 2.0

Forward Voltage

MAX.

2.4 2.4

V IF

=20mA

Reverse Current

MAX.

10 10

µA

VR = 5V

Capacitance C

TYP.

40 40

VF=0, f=1MHZ

Notes: 1. Luminous intensity is measured with a light sensor and filter combination that approximates the

CIE eye-response curve.
2. 1/2 is the off-axis angle at which the luminous intensity is half the axial luminous intensity.
3. The dominant wavelength,d is derived from the CIE chromaticity diagram and represents the
single wavelength which defines the color of the device.

Part No. : LTST-C155KGJRKT

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BNS-OD-C131/A4

LITE-ON TECHNOLOGY CORPORATION

P r o p e r t y o f L i t e - O n O n l y

Part No. : LTST-C155KGJRKT

Page : 9 of 11

BNS-OD-C131/A4

CAUTIONS

1. Application

The LEDs described here are intended to be used for ordinary electronic equipment (such as office
equipment, communication equipment and household applications).Consult Liteon's Sales in advance
for information on applications in which exceptional reliability is required, particularly when the failure
or malfunction of the LEDs may directly jeopardize life or health (such as in aviation, transportation,
traffic control equipment, medical and life support systems and safety devices).

2. Storage

The storage ambient for the LEDs should not exceed 30°C temperature or 70% relative humidity.
It is recommended that LEDs out of their original packaging are IR-reflowed within one week.
For extended storage out of their original packaging, it is recommended that the LEDs be stored in a
sealed container with appropriate desiccant, or in a desiccators with nitrogen ambient.
LEDs stored out of their original packaging for more than a week should be baked at about 60 deg C
for at least 24 hours before solder assembly.

3. Cleaning

Use alcohol-based cleaning solvents such as isopropyl alcohol to clean the LED if necessary.

4. Soldering

Recommended soldering conditions:

Reflow soldering

Wave Soldering

Soldering iron

Pre-heat
Pre-heat time
Peak temperature
Soldering time

120~150°C
120 sec. Max.
240°C Max.
10 sec. Max.

Pre-heat
Pre-heat time
Solder wave
Soldering time

100°C Max.
60 sec. Max.
260°C Max.
10 sec. Max.

Temperature
Soldering time

300°C Max.
3 sec. Max.
(one time only)

5. Drive Method

An LED is a current-operated device. In order to ensure intensity uniformity on multiple LEDs
connected in parallel in an application, it is recommended that a current limiting resistor be incorporated
in the drive circuit, in series with each LED as shown in Circuit A below.

Circuit model A

Circuit model B

LED

(A) Recommended circuit.

(B) The brightness of each LED might appear different due to the differences in the I-V characteristics

of those LEDs.

6. ESD (Electrostatic Discharge)

Static Electricity or power surge will damage the LED.
Suggestions to prevent ESD damage:

Use of a conductive wrist band or anti-electrostatic glove when handling these LEDs.

All devices, equipment, and machinery must be properly grounded.

Work tables, storage racks, etc. should be properly grounded.

Use ion blower to neutralize the static charge which might have built up on surface of the LED's
plastic lens as a result of friction between LEDs during storage and handling.

LITE-ON TECHNOLOGY CORPORATION

P r o p e r t y o f L i t e - O n O n l y

Part No. : LTST-C155KGJRKT

Page : 10 of 11

BNS-OD-C131/A4

ESD-damaged LEDs will exhibit abnormal characteristics such as high reverse leakage current, low
forward voltage, or " no lightup " at low currents.
To verify for ESD damage, check for " lightup " and Vf of the suspect LEDs at low currents.
The Vf of " good " LEDs should be >2.0V@0.1mA for InGaN product and >1.4V@0.1mA for AlInGaP
product.

7. Reliability Test

Classification

Test Item

Test Condition

Reference Standard

Operation Life

Ta= Under Room Temperature As Per Data Sheet
Maximum Rating
*Test Time= 1000HRS (-24HRS,+72HRS)*@20mA.

MIL-STD-750D:1026 (1995)
MIL-STD-883D:1005 (1991)
JIS C 7021:B-1 (1982)

High Temperature

High Humidity

Storage

IR-Reflow In-Board, 2 Times
Ta= 65±5,RH= 9095%
*Test Time= 240HRS±2HRS

MIL-STD-202F:103B(1980)
JIS C 7021:B-11(1982)

High Temperature

Storage

Ta= 105±5
*Test Time= 1000HRS (-24HRS,+72HRS)

MIL-STD-883D:1008 (1991)
JIS C 7021:B-10 (1982)

Endurance

Test

Low Temperature

Storage

Ta= -55±5
*Test Time=1000HRS (-24HRS,+72H RS)

JIS C 7021:B-12 (1982)

Temperature

Cycling

105 25 -55 25
30mins 5mins 30mins 5mins
10 Cycles

MIL-STD-202F:107D (1980)
MIL-STD-750D:1051(1995)
MIL-STD-883D:1010 (1991)
JIS C 7021:A-4(1982)

Thermal

Shock

IR-Reflow In-Board, 2 Times
85 ± 5 -40 ± 5
10mins 10mins 10 Cycles

MIL-STD-202F:107D(1980)
MIL-STD-750D:1051(1995)
MIL-STD-883D:1011 (1991)

Solder

Resistance

T.sol= 260 ± 5
Dwell Time= 10 ± 1secs

MIL-STD-202F:210A(1980)
MIL-STD-750D:2031(1995)
JIS C 7021:A-1(1982)

IR-Reflow

Normal Process

Ramp-up rate(183 to Peak) +3/ second max
Temp. maintain at 125(±25) 120 seconds max
Temp. maintain above 183 60-150 seconds
Peak temperature range 235+5/-0
Time within 5°C of actual Peak Temperature (tp)
10-30 seconds
Ramp-down rate +6/second max

MIL-STD-750D:2031.2(1995)
J-STD-020(1999)

IR-Reflow

Pb Free Process

Ramp-up rate(217 to Peak) +3 / second max

Temp. maintain at 175(±25) 180 seconds max

Temp. maintain above 217 60

-150 seconds

Peak temperature range 260 +0/

-5

Time within 5°C of actual Peak Temperature (tp)
20-40 seconds
Ramp-down rate +6 /second max

MIL-STD-750D:2031.2(1995)
J-STD-020(1999)

Environmental

Test

Solderability

T.sol= 235 ± 5
Immersion time 2±0.5 sec
Immersion rate 25±2.5 mm/sec
Coverage 95% of the dipped surface

MIL-STD-202F:208D(1980)
MIL-STD-750D:2026(1995)
MIL-STD-883D:2003(1991)
IEC 68 Part 2-20
JIS C 7021:A-2(1982)

8. Others

The appearance and specifications of the product may be modified for improvement without prior notice.

LITE-ON TECHNOLOGY CORPORATION

P r o p e r t y o f L i t e - O n O n l y

9. Suggested Checking List

Training and Certification
1. Everyone working in a static-safe area is ESD-certified?
2. Training records kept and re-certification dates monitored?

Static-Safe Workstation & Work Areas
1. Static-safe workstation or work-areas have ESD signs?
2. All surfaces and objects at all static-safe workstation and within 1 ft measure less than 100V?
3. All ionizer activated, positioned towards the units?
4. Each work surface mats grounding is good?

Personnel Grounding

Every person (including visitors) handling ESD sensitive (ESDS) items wears wrist strap, heel

strap or conductive shoes with conductive flooring?

2. If conductive footwear used, conductive flooring also present where operator stand or walk?
3. Garments, hairs or anything closer than 1 ft to ESD items measure less than 100V*?
4. Every wrist strap or heel strap/conductive shoes checked daily and result recorded for all DLs?
5. All wrist strap or heel strap checkers calibration up to date?

Note: *50V for Blue LED.

Device Handling

1. Every ESDS items identified by EIA-471 labels on item or packaging?
2. All ESDS items completely inside properly closed static-shielding containers when not at

static-safe workstation?

3. No static charge generators (e.g. plastics) inside shielding containers with ESDS items?

4. All flexible conductive and dissipative package materials inspected before reuse or recycles?

Others

1. Audit result reported to entity ESD control coordinator?
2. Corrective action from previous audits completed?
3. Are audit records complete and on file?

Part No. : LTST-C155KGJRKT

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BNS-OD-C131/A4

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