MIL-M-38510-209 Microcircuit, Digital, 8192-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, zapped vertical emitter, tungsten W, titanium tungsten TiW, or platinum silicide as the fusible link or programming element. Two product assurance class and a choice of case outlines and lead 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 For this product, the requirements of MIL-M-38510 have been superseded by MIL-PRF-38535, see 6.4.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-38510/209H

4.8.1     Programming procedure for circuit B, device types 01, 02, and 08.  The waveforms on figure 5B, (device types 01, 02, and 08), the programming characteristics in table IVB (device types 01, 02, and 08), and the following procedures shall apply for programming the device:

a.  Connect the device in the electrical configuration for programming.

b.  Apply VIH to  CE 1 and the binary address of the PROM word to be programmed.  Raise VCC to VCCP. c.   After a tD delay, apply only one VOP to the output to be programmed high.

Apply VOP to one output at a time.

d.  After a tD delay, a pulse  CE 1 to a VIL level for a duration of tP.

e.  After a tP and tD delay, remove VOP from the programmed output.

f.   Other bits in the same word may be programmed sequentially while the VCC input is at the VCCP level by applying VOP pulses to each output to be programmed and pulsing  CE 1 to the VIL level, allowing for proper delays between VOP and  CE 1.

g.  Repeat 4.8.1b through 4.8.1e for all other bits to be programmed.

h.  To verify programming, lower VCCP to VCC.  Connect a 10 kn resistor between each output and VCC.

Apply VIL to  CE 1 input.  The programmed outputs should remain in the high state and the unprogrammed outputs should go to the low level.

i.    For classes S and B devices, if any bit does not verify as programmed, it shall be considered a programming reject.

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