MIL-M-38510-206 Microcircuit, Digital, 4096 Bit Schottky, Bipolar, Programmable Read-Only Memory PromThis specification covers the detail requirements for monolithic silicon, programmable read-only memory PROM microcircuits which employ thin film nichrome NiCr resistors, tungsten W or titanium tungsten TiW 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. A special test requirement is included in this specification to screen against devices which may contain excess moisture in the package materials or internal atmosphere see freeze-out test of 4.2d. For this product, the requirements of MIL-M-38510 have been superseded by MIL-PRF-38535, see 6.4.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-38510/206D

Dimension
Symbol	Inches		Millimeters		Notes
Symbol	Min	Max	Min	Max	Notes
A	.045	.085	1.14	2.16
b	.014	.017	0.36	0.43	5
c	.003	.006	0.08	0.15	5
D		.380		9.65	3
E	.340	.380	8.64	9.65
E1		.400		10.16	3
e	.050 BSC		1.27 BSC		4,6
K	.008	.015	0.20	0.38	9
L	.250	.370	6.35	9.40
Q	.010	.040	0.25	1.02	2
S2	.004		0.10		10
S1	.005		0.13		7, 8
a	30o	90o	30o	90o	11

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 (dim K) may be used to identify pin one. This tab may be located on either side as shown.

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

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

4. The basic pin spacing is .050 (1.27 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 18.

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

6. Sixteen spaces.

7. Applies to all four corners (leads number 2, 8, 11, and 17).

8. Dimension S1 may be .000 (0.00 mm) if leads number 2, 8, 11, and 17 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, 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.

10. Applies to leads number 1, 9, 10, and 18.

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

FIGURE 1. Case outline Z (18-lead, 3/8" x 3/8") - Continued.