MIL-PRF-19500/467A
6.2 Acquisition requirements. Acquisition documents should specify the following:
a. Title, number, and date of this specification.
b. Packaging requirements (see 5.1).
c. Lead finish (see 3.4.1).
d. Product assurance level and type designator.
6.3 Qualification. With respect to products requiring qualification, awards will be made only for products which
are, at the time of award of contract, qualified for inclusion in Qualified Manufacturers List (QML-19500) whether or
not such products have actually been so listed by that date. The attention of the contractors is called to these
requirements, and manufacturers are urged to arrange to have the products that they propose to offer to the Federal
Government tested for qualification in order that they may be eligible to be awarded contracts or orders for the
products covered by this specification. Information pertaining to qualification of products may be obtained from
Defense Supply Center, Columbus, ATTN: DSCC/VQE, P.O. Box 3990, Columbus, OH 43218-3990 or e-mail
6.4 Applications. These light emitting diodes are primarily intended for use as visible indicators (ON or OFF) of
status. The modulation rate capability can be high enough to accommodate video signals. Diodes may be operated
in either direct current or pulsed mode depending upon current availability. Pulsed operation is desirable as a
means of linear control of average intensity or of improving the average efficiency (ratio of average intensity to
average current).
6.5 Operating considerations. Under normal ambient light conditions (300 to 1,000 lux), a typical forward current
of 6 mA is required to produce an adequate on-state luminous intensity. This current level is directly compatible with
TTL devices, and only simple buffering is needed when operating from LSTTL, LTTL, CMOS. No consideration of
inrush current or keep-alive voltage is necessary.
6.6 Reliability considerations. There is a correlation between LED luminous intensity degradation and operating
current levels. To lengthen the useful life of this device, drive current should be held to a minimum consistent with
use conditions: Luminous intensity would have to change by more than 50 percent before becoming apparent to the
causal observer.
* 6.7 Changes from previous issue. The margins of this specification are marked with asterisks to indicate where
changes from the previous issue were made. This was done as a convenience only and the Government assumes
no liability whatsoever for any inaccuracies in these notations. Bidders and contractors are cautioned to evaluate the
requirements of this document based on the entire content irrespective of the marginal notations and relationship to
the last previous issue.
Custodians:
Preparing activity:
Army - CR
DLA - CC
Air Force - 11
DLA - CC
(Project 5961-2008-026)
* NOTE: The activities listed above were interested in this document as of the date of this document. Since
organizations and responsibilities can change, you should verify the currency of the information above using the
ASSIST Online database at https://assist.daps.dla.mil .
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