OLS449 Datasheet, PDF (1/6 Pages) Skyworks Solutions Inc. – Radiation Tolerant Phototransistor Hermetic Surface Mount Optocoupler

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DATA SHEET
OLS449: Radiation Tolerant Phototransistor Hermetic Surface
Mount Optocoupler
Features
 Radiation tolerant version of the 4N49U
 High current transfer ratio (CTR) is guaranteed:
– Over –55 °C to +100 °C ambient temperature range
– At LED current of 1mA
 1000 VDC electrical isolation
 Same reliable processing and construction as the OLS249, but
with a higher CTR
 High-reliability screenings are available
Description
The OLS449 is specifically designed for high reliability and space
applications that require optical isolation in radiation
environments such as gamma, neutron, and proton radiation with
a high CTR and low saturation VCE. Each optocoupler consists of
an LED and N-P-N silicon phototransistor that is electrically
isolated, but optically coupled inside a hermetic six-pin Leadless
Chip Carrier (LCC) package.
Electrical parameters are similar to the JEDEC registered 4N49
optocoupler, but with a higher CTR and better CTR degradation
characteristics due to radiation exposure.
The OLS449 is designed for a low LED operating current while
providing excellent radiation tolerance margins. The OLS449 has
100 percent high-reliability screenings available.
Figure 1. OLS449 Block Diagram
A functional block diagram of the OLS449 is shown in Figure 1.
The absolute maximum ratings of the OLS449 are provided in
Table 1. Electrical specifications are provided in Table 2.
Typical performance characteristics of the OLS449 are illustrated
in Figures 2 through 4. A typical switching test circuit is shown in
Figure 5 and package dimensions for the OLS449 are provided in
Figure 6.
Isolink, Inc. • Phone [408] 946-1968 • Fax [408] 946-1960 • [e-mail] • www.isolink.com
202470D • Isolink Proprietary Information • Products and Product Information are Subject to Change Without Notice • May 5, 2015
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