MIL-DTL-28803-1 Display, Optoelectronic, Segmented Readout, Backlighted, Style Ii \(Light Emitting Diodes\), Rfi Shielded, Moisture Sealed, High Impact Shock, Type, Ro1

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MIL�DTL�28803/1E

Optical:

Chromaticity: Method II in accordance with MIL�DTL�28803, color red (Y = .355 maximum, Z = .002 maximum).

Contrast ratio: 20 to 1 minimum at 110 foot-candles (1184 lux) incidental illumination.

Luminance: Luminance shall be in accordance with MIL�DTL�28803.

Physical and mechanical:

Mechanical endurance and solderability: Not applicable.

Terminal strength: The terminals shall be tested in accordance with Method 211 of MIL�STD�202, with the

following details and exceptions: Test condition A and the applied force shall be 5 pounds (2.27 Kg).

Electrical:

Circuit configuration display characteristics: See figures 5 through 7.

Conventions for truth tables. The following conventions are used in the truth tables (tables III through IX) herein:

"0"

Logic low level, represents ground potential (0.0 V dc).

"1"

Logic high level.

"X"

Logical "0" or "1".

"DPT"

Decimal point.

"EN"

Enable.

"LT"

LED test.

"BI"

Blanking input.

"Δ"

Segment lit.

Truth tables with latching: The truth tables shown are for when enable (EN) is at logic low level. Segments

energized prior to enable going to logic high level will remain lit.

Conversion logic encoders verification: The conversion logic encoders used in the fabrication of displays shall be

screened in accordance with the class B requirements of method 5004 of MIL�STD�883 and tested in accordance

with the class B requirements of method 5005 of MIL�STD�883.

Conversion logic electrical characteristics: See tables X and XI.

Environmental:

Seal (immersion): MIL�STD�810, method 512, procedure I. Following the test, there shall be no evidence of

leakage and displays shall meet the dielectric withstanding voltage requirements in accordance with

Shock: Method II (high impact) in accordance with MIL�DTL�28803.

Vibration grade 2: Displays shall be tested in accordance with Method 204, test condition A (10-500 Hz) of

Operating temperature range: �50�C to +85�C.

PIN code letters for module combinations, type, arrangement, circuit configuration, and seal: See tables XII and XIII.