LGA 771 Socket Mechanical Design Guide
19
Electrical Requirements
4
Electrical Requirements
provides the LGA771 Socket electrical requirements.
Socket electrical requirements are measured from the socket-seating plane of the
processor to the component side of the PCB to which it is attached. All specifications
are maximum values (unless otherwise stated) for a single socket contact, but includes
effects of adjacent contacts where indicated.
§
Table 4-1.
LGA771 Socket Electrical Requirements
No
Criteria
Size
Notes
*1
Mated loop
inductance, Loop
1.17 mm:
<3.9 nH
The inductance calculated for two contacts, considering one
forward conductor and one return conductor. These values
must be satisfied at the worst-case height of the socket.
2
Mated partial mutual
inductance, L
NA
The inductance on a conductor due to any single neighboring
conductor.
3
Maximum mutual
capacitance, C
<1 pF
The capacitance between two pins/connectors.
4
Socket Average
Contact Resistance
(EOL)
≤
15.2 m
Ω
This value has to be satisfied at all times.
The specification listed is at room temperature.
The socket average resistance target is derived from average
of every chain contact resistance, with a chain contact
resistance defined as the resistance of each chain minus
resistance of shorting bars divided by number of lands in the
daisy chain.
Socket Contact Resistance:
The resistance of the socket
contact, including the interface resistance to the package land.
5
Max Chain Contact
Resistance (EOL)
≤
28 m
Ω
This value has to be satisfied at all times.
The specification listed is at room temperature.
The socket average resistance target is derived from average
of every chain contact resistance, with a chain contact
resistance defined as the resistance of each chain minus
resistance of shorting bars divided by number of lands in the
daisy chain.
Socket Contact Resistance:
The resistance of the socket
contact, including the interface resistance to the package land.
6
Bulk Resistance
Increase
≤
3 m
Ω
The bulk resistance increase per contact from 24°C to 100°C
7
Dielectric Withstand
Voltage
360 Volts
RMS
8
Insulation Resistance
800 M
Ω
Summary of Contents for LGA771
Page 1: ...Reference Number 313871 002 LGA771 Socket Mechanical Design Guide November 2006 ...
Page 6: ...6 LGA 771 Socket Mechanical Design Guide ...
Page 10: ...Assembled Component and Package Description 10 LGA 771 Socket Mechanical Design Guide ...
Page 17: ...LGA 771 Socket Mechanical Design Guide 17 Mechanical Requirements Figure 3 2 Definition of R ...
Page 18: ...Mechanical Requirements 18 LGA 771 Socket Mechanical Design Guide ...
Page 20: ...Electrical Requirements 20 LGA 771 Socket Mechanical Design Guide ...
Page 24: ...Environmental Requirements 24 LGA 771 Socket Mechanical Design Guide ...
