MIL-M-38510-207 Microcircuit, Digital, 256-Bit, Schottky, Bipolar, Programmable Read-Only Memory Prom, Monolithic SiliconThis specification covers the detail requirements for monolithic silicon, PROM microcircuits which employ thin film nichrome NiCr resistors, tungsten W, 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 material and finishes are provided for each type 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 For this product, the requirements of MIL-M-38510 have been superseded by MIL-PRF-38535, see 6.4.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-38510/207E

N0TES:

1. NA = Not applicable.

2. x = Input may be high level, low level or open circuit.

3. 0c = 0pen circuit (high resistance output).

4. Program readout can only be accomplished with enable input at low level.

5. The outputs for an unprogrammed device shall be high for circuits A and B;

and shall be low for circuits c, G, and H.

FIGURE 2. Truth table (unprogrammed).