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Electrical Requirements
mPGA604 Socket Design Guidelines 27
for the socket. The shoulder of the interposer is not included in the electrical modeling. If there is
any difference between them, it will be called the de-embedded correction factor. Adding the
interposer to the socket and then eliminating the contribution of the fixture creates this correction
factor because inductance is not linear.
4.4 Pin-to-Pin Capacitance
Pin-to-pin capacitance shall be measured using configuration 4, with the motherboard not connected
and only the measurements with the package mounted on the socket will be taken. Capture data at
frequency specified in Item 5 of Table 4-1.
4.5 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 four sockets. The contacts shall be randomly
chosen.
4.6 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 four sockets. The
contacts shall be randomly chosen.
4.7 Contact Current Rating
Measure and record the temperature rise when the socket is subjected to rated current of 0.8A. 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 so those 603 pins are connected in series. The
recommended Test-board is the FSETV4 Rev 1 and the recommended package is FSETV5 Rev 1.
The wiring list is shown below. Mount the thermocouple as near to contact N3 or N7 as possible.
Short the daisy chains by means of the edge fingers if possible. Sample size is one socket.
Table 4-4. Netlist for FSETV4 Rev 1 Edge Fingers
Edge Fingers
+I: A61
Jumpers
–I: A145 A85-A89 A45-A17 A135-A141
A59-A57 A129-A133 A7-A5
A87-A95 A15-A13 A139-A143
A49-A47 A131-A137 A3-A1
A101-A99 A11-A9