NASA Office of Logic Design

A scientific study of the problems of digital engineering for space flight systems,
with a view to their practical solution.

Analysis and Diagnostics

RT54SX72SU  Unprogrammed Antifuse Heavy Ion Test, UMC Die, 0.25 µm
BNL, April, 2004

I_CCA Static Currents (mA)

	Zero Filled	One Filled
S/N LAN7001	81.7	81.9
S/N LAN7002	1.2	1.2
S/N LAN7003	34.4	34.6

Other related tests:

• The devices were filled with Checkerboard and Checkerboard* patterns.  No change of current was observed.

• S/N LAN7001 and S/N LAN7003 was power cycled 10 times each in an attempt to randomize the contents.  No change of current was observed.

• S/N LAN7001 and S/N LAN7003 were first filled with zeros and then backfilled with 1's while single stepping the clock.  At each clock step, the static supply currents were monitored and did not change over the course of the test.

Functional Testing

• No functional failures were detected during irradiation.

• No functional failures were detected at V_CCA (max) = 2.75VDC.

• No functional failures were detected at V_CCA = 1.7VDC.

Rupture Runs - Antifuse Ruptures (number and magnitudes) Added

• Biases for these runs = 5.5V/2.75V

• All runs with checkerboard pattern

• Number of ruptures and current magnitudes are subjective so these numbers should be considered close approximations.

 

Frequency of Rupture by I_CCA

 

BNL Run	DUT	Ion	Tilt Deg	Roll Deg	Fluence Ions/cm2	Clock Freq	# of Ruptures	Rupture Currents (mA)	Strip Chart
879	LAN7003	I-127	55	0	1.00E+07	10M	5	4,6,6,8,10	7003i5.jpg
880	LAN7003	I-127	0	0	1.00E+07	10M	2	4,4	7003i6.jpg
883	LAN7002	I-127	0	0	1.00E+07	0.5M
884	LAN7002	I-127	0	0	1.00E+07	0.5M
885	LAN7002	I-127	0	0	1.00E+07	10M
886	LAN7002	I-127	55	0	1.00E+07	10M
889	LAN7001	I-127	0	0	1.00E+07	10M
890	LAN7001	I-127	55	0	1.00E+07	10M	4	5,8,10,14	7001i4.jpg
891	LAN7001	I-127	55	0	1.00E+07	0.5M	4	6,6,7,8	7001i5.jpg
892	LAN7001	I-127	0	0	1.00E+07	0.5M
893	LAN7001	I-127	55	0	1.00E+07	0.5M	1	5	7001i7.jpg
894	LAN7001	I-127	55	0	1.00E+07	0.5M	4	4,5,6,7	7001i8.jpg
895	LAN7001	I-127	0	0	1.00E+07	0.5M
896	LAN7001	Br-81	55	0	1.00E+07	0.5M
897	LAN7001	Br-81	55	0	1.00E+07	10M
898	LAN7001	Br-81	0	0	1.00E+07	10M
899	LAN7003	Br-81	55	0	1.00E+07	10M
900	LAN7003	Br-81	0	0	1.00E+07	10M
Total							19

S/N LAN7003
	Left Side		Right Side
Magnification	.bmp	.jpg	.jpg	.bmp
Low
Medium
High

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