R
Electrical Requirements
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.
4.4Pin-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.
4.5Dielectric 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.
4.6Insulation 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.
4.7Contact 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 | |
mPGA604 Socket Design Guidelines | 27 |