Datasheet

LITE-ON TECHNOLOGY CORPORATION
Pr o p e r t y o f L i t e - O n O n ly
Part No. : LTW-E670DS
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
This product is qualified as Moisture sensitive Level 3 per JEDEC J-STD-020 Precaution when handing
this moisture sensitive product is important to ensure the reliability of the product.
The package is sealed:
The LEDs should be stored at 30°C or less and 90%RH or less. And the LEDs are limited to use within
one year, while the LEDs is packed in moisture-proof package with the desiccants inside.
The package is opened:
The LEDs should be stored at 30°C or less and 60%RH or less. Moreover, the LEDs are limited to solder
process within 168hrs. If the Humidity Indicator shows the pink color in 10% even higher or exceed the
storage limiting time since opened, that we recommended to baking LEDs at 60°C at least 48hrs. To seal
the remainder LEDs return to package, it’s recommended to be with workable desiccants in original
package.
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
Soldering Temp.
Soldering time
120~150°C
120 sec. Max.
260°C Max.
30 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
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: