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Page Title:
High voltage verify for all fuse locations. |
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|  MIL-M-38510/505C
First verification pass for all fuse locations.
4.6.3
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.
Pulse the clock pin and verify (with clock at VIL) that the output pins, 00 through 03 are in the correct
d.
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, 15C to 30C. 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.
Raise VCC to 5.5 V.
a.
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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