MIL-M-38510-505 Microcircuits, Digital, Bipolar Programmable Logic, Monolithic SiliconThis specification covers the detail requirements for monolithic silicon, bipolar, programmable logic microcircuits which employ titanium tungsten resistors as the fusible link or programming element. Two product assurance classes B and S and a choice of case outlines and lead finishes are provided and are reflected in the complete part or identifying number PIN. For this product, the requirements of MIL-M-38510 have been superseded by MIL-PRF-38535, see 6.4.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-38510/505C

4.6.3       First verification pass for all fuse locations.

4.6.3.1   Circuits A and B.

a.    Raise VCC  to 4.5 volts.

b.    Select input line as specified in 4.6.1.1c.

c.    Select a product line as specified in 4.6.1.1d.

d.        Pulse the clock pin and verify (with clock at VIL) that the output pins, 00 through 03 are in the correct state.

(1)   For verified output state, continue procedure. (2)   For overblown conditions, stop procedure.

(3)   For underblown condition, reject part.

e.    Repeat this procedure from 4.6.3.1b until the entire array is exercised.

4.6.3.2   Circuit C.

a.    Raise VCC  to 4.5 V.

b.    Raise PGM ENABLE pin to VIHH.

c.    Select an input line as specified in 4.6.1.2c.

d.    Select a product line as specified in 4.6.1.2d.

e.        Pulse PGM VERIFY pin and verify that the outputs 00-07 are in the correct state. (1)   For verified output condition continue the procedure.

(2)   For overblown conditions, stop procedure. (3)   For underblown condition, reject part.

f.     Repeat this procedure from 4.6.3.1c until the entire array is exercised.

4.6.4      High voltage verify for all fuse locations.

4.6.4.1   Circuits A and B.

a.    Raise VCC  to 5.5 volts.

b.    Repeat from 4.6.3.1b to 4.6.3.1d until the entire array is exercised.

Programming should be attempted at room temperature, 15°C to 30°C.  To prevent further programming, security fuses may be blown.  Raise VCC  to 6.0 volts, and raise pins 1 and 11 to VP  for 10 milliseconds to 1 second.

4.6.4.2   Circuit C.

a.    Raise VCC  to 5.5 V.

b.    Repeat procedure from 4.6.3.2c until the entire array is exercised.

Security fuse information:  The security fuse is programmed using procedure in 4.6.2.2 omitting steps 4.6.2.2e and

4.6.2.2h.

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