MIL-M-38510-208 Microcircuit, Digital, 4096-Bit Schottky, Bipolar, Programmable Read-Only Memory Prom, Monolithic SiliconThis specification covers the detail requirements for monolithic silicon, programmable read-only memory PROM microcircuits which employ thin film nichrome NiCr resistors, titanium-tungsten TiW, or zapped vertical emitter ZVE as the fusible link or programming element. Two product assurance classes and a choice of case outlines and lead finishes are provided and are reflected in the complete part number. For this product, the requirements of MIL-M-38510 have been superseded by MIL-PRF-38535, see 6.4.

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MIL-M-38510/208F

NOTES:

1. Index area; a notch or a pin one identification mark shall be located adjacent to pin one and shall be within the shaded area shown. The manufacturer's identification shall not be used as a pin one identification mark. Alternately, a tab (dimension k) may be used to identify pin one.

2. Dimension Q shall be measured at the point of exit of the lead from the body.

3. This dimension allows for off-center lid, meniscus and glass overrun.

4. The basic pin spacing is .050 (1.25 mm) between centerlines. Each pin centerline shall be located within

±.005 (0.13 mm) of its exact longitudinal position relative to pins relative to pins 1 and 24.

5. All leads - increase maximum limit by .003 (0.08mm) measured at the center of the flat, when lead finish A

is applied.

6. Twenty-two spaces.

7. Applies to all four corners (leads number 3, 10, 15, and 22).

8. Dimension S1 may be .000 (0.00 mm) if leads number 3, 10, 15, and 22 bend toward the cavity of the package within one lead width from the point of entry of the lead, into the body or if the leads are brazed to the metallized ceramic body (see MIL-STD-1835) .

9. Optional configuration: if this configuration is used, no organic or polymeric materials shall be molded to the bottom of the package to cover the leads.

10. Optional, see note 1. If a pin one identification mark is used in addition to this tab, the minimum limit of dimension k does not apply.

11. Applies to leads number 2, 11, 14, and 23.

12. Lead configuration is optional within dimension E except dimensions b and c apply (see MIL-STD-1835).

13. Applies to lead numbers 1, 2, 11, 12, 13, 14, 23, and 24.

14. Applies to all edges.

FIGURE 1. Case outline X - Continued.