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

Intel® Pentium® 4 Processor 478-Pin Socket (mPGA478)
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4. Electrical Requirements
In order to meet the performance requirements, the socket must meet the following electrical requirements
listed in Table 4-1 – Electrical Requirements. These parameters are determined to be a unique function of
the socket geometry and material property and correctly define the socket electrical characteristics. The
definitions for these are given in Table 4-2, and the details for the measurement procedure to achieve these
values are listed in the following sections.
4.1. Electrical Requirements
Table 4-1. Electrical Requirements
Item Parameter Limit Note
1. Mated loop inductance, Lloop <3.3nH
2. Maximum mutual capacitance, C ≤ 1.1 pF Refer to Section 4.2 – Definitions
Final mated connection resistance for Kovar pin
daisy chain Package Test Vehicle (average of
minimum 40 pin/connector mated connections)
≤ 25 mΩ 3.
Final mated connection resistance for Cu alloy pin
daisy chain Package Test Vehicle (average of
minimum 40 pin/connector mated connections)
≤ 17 mΩ
4. Socket minimum current rating @ 1.0A Read and
Record
Testing shall be measured per EIA
364, Test Procedure 70, Method 1.
5. Pin-to-Pin/Connector-to-Connector insulation
resistance (min)
> 800 MΩ Insulation resistance shall be a
minimum requirement of 800MΩ as
measured per EIA 364, Test
Procedure 21
6. Measurement frequency for Pin-to-Pin/Connector-
to-Connector capacitance.
400 MHz
7. Measurement frequency(s) for Pin-to-
Pin/Connector-to-Connector inductance.
1GHz