Intel Xeon L7445 AD80583JH046003 Data Sheet

36

Intel® Xeon® Processor 7400 Series Datasheet

1.

Unless otherwise noted, all specifications in this table apply to all processor frequencies.

2.

The tolerances for this specification have been stated generically to enable system designer to calculate the minimum values 

across the range of V

TT

.

3.

GTLREF_DATA_MID, GTLREF_DATA_END, GTLREF_ADD_MID, and GTLREF_ADD_END is generated from V

TT

 on the baseboard 

by a voltage divider of 1% resistors. The minimum and maximum specifications account for this resistor tolerance. Refer to 

the appropriate platform design guidelines for implementation details. The V

TT

 referred to in these specifications is the 

instantaneous V

TT

4.

R

TT

 is the on-die termination resistance measured at V

OL

 of the AGTL+ output driver. Measured at 0.33*V

TT

. R

TT

 is connected 

to V

TT

 on die.

5.

COMP resistance must be provided on the system board with +/- 1% resistors. See the applicable platform design guide for 

implementation details

1.

Unless otherwise noted, all specifications in this table apply to all processor frequencies.

2.

Crossing Voltage is defined as the instantaneous voltage value when the rising edge of BCLK0 is equal to the falling edge of 

BCLK1.

3.

V

Havg

 is the statistical average of the V

H

 measured by the oscilloscope.

4.

Overshoot is defined as the absolute value of the maximum voltage.

5.

Undershoot is defined as the absolute value of the minimum voltage.

6.

Ringback Margin is defined as the absolute voltage difference between the maximum Rising Edge Ringback and the maximum 

Falling Edge Ringback.

7.

Threshold Region is defined as a region entered around the crossing point voltage in which the differential receiver switches. 

It includes input threshold hysteresis.

8.

The crossing point must meet the absolute and relative crossing point specifications simultaneously.

9.

V

Havg

 can be measured directly using “Vtop” on Agilent* and “High” on Tektronix* oscilloscopes.

10. For VIN between 0 V and VH, 

11. VCROSS is defined as the total variation of all crossing voltages as defined in note 3.

GTLREF_DATA_MID
GTLREF_DATA_END

Data Bus Reference 

Voltage

0.98 * 0.67 * V

TT

0.67 * V

TT

1.02 * 0.67 * V

TT

V

2,  3

GTLREF_ADD_MID
GTLREF_ADD_END

Address Bus 

Reference Voltage

0.98 * 0.67 * V

TT

0.67 * V

TT

1.02 * 0.67 * V

TT

V

2,  3

R

TT

Termination 

Resistance (pull up)

45

50

55

Ω

4

COMP

COMP Resistance

49.4

49.9

50.4

Ω

5

V

L

Input Low Voltage

-0.150

0.0

.15

V

V

H

Input High Voltage

0.660

0.710

0.850

V

V

CROSS(abs)

Absolute Crossing 

Point

0.250

0.350

0.550

V

2,8

V

CROSS(rel)

Relative Crossing 

Point

0.250 + 

0.5 * (V

Havg

 - 0.700)

N/A

0.550 + 

0.5 * (V

Havg

 - 0.700)

V

3,8,9,11

Δ V

CROSS

Range of Crossing 

Points

N/A

N/A

0.140

V

V

OS

Overshoot

N/A

N/A

V

H

 + 0.300

V

4

V

US

Undershoot

-0.300

N/A

N/A

V

5

V

RBM

Ringback Margin

0.200

N/A

N/A

V

6

V

TR

Threshold Region

V

CROSS

 - 0.100

N/A

V

CROSS

 + 0.100

V

7

I

LI

Input Leakage 

Current

N/A

N/A

+/- 100

μA

10