603 Pin Socket Design Guidelines

4. Calculate

sandwich

L .

5. For each socket unit, calculate

sandwich

assemblysocketsocket

LLL −=

It means

sandwich

L will be subtracted from each

assemblysocket

L and the result will be

compared with spec value for each individual socket unit.

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 interposer 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 4 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 4 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 an interposer so those 370 pins are connected in series. The

recommended Test-board is the FSETV4 Rev 1 and the recommended interposer is FSETV5 Rev 1.

The wiring list is shown below. Mount the thermocouple as near to contact N3 or N 7 as possible.

Short the daisy chains by means of the edge fingers if possible. Sample size is one socket.

Table 4.7.1 Net list 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