Intel Pentium 4 Processor 478-Pin Socket (mPGA478) Design Guidelines

Intel® Pentium® 4 Processor 478-Pin Socket (mPGA478)
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4.8. Dielectric Withstand Voltage
No disruptive discharge or leakage greater than 0.5 mA is allowed when subjected to 360 V RMS. The
sockets shall be tested according to EIA-364, Test Procedure 20A, Method 1. The sockets shall be tested
unmounted and unmated. Barometric pressure shall be equivalent to Sea Level. The sample size is 25
contact-to-contact pairs on each of 4 sockets. The contacts shall be randomly chosen.
4.9. Insulation Resistance
The Insulation Resistance shall be greater than 800 M Ohm when subjected to 500 V DC. The sockets shall
be tested according to EIA-364, Test Procedure 21. The sockets shall be tested unmated and unmounted.
The sample size is 25 contact-to-contact pairs on each of 4 sockets. The contacts shall be randomly chosen.
4.10. Contact Current Rating
Trise < 45°C when the socket is subjected to rated current of 1.0A. The sockets shall be tested according to
EIA-364, Test Procedure 70A, Test Method 1. The sockets shall be mounted on a test board and mated with
a package and 200 pins must be chained together. Tambient = 45
°C. Contact temp must be less than 90°C.