Intel 9550 CM8063101049807 Data Sheet

35

1.

1300 mVpp swing is recommended when CPU to CPU or CPU to IOH length is within 2” of PDG max trace 

length. Note that default value is 1100 mVpp.

2.

Measure AC CM noise at the TX and decimate to its spectral components. For all spectral components above 

3.2 GHz, apply the attenuation of the channel at the appropriate frequency. If the resultant AC CM at the 

receiver is met after taking out the appropriate spectral components meets the RX AC CM spec then we can 

allow the transmitter AC CM noise to pass.

TX

clk-acc-jit-N_UI-1E-7

p-p accumulated jitter out of 

transmitter over 0 <= n <= N UI 

where N=12, measured with 1E-7 

probability.

0

0.15

UI

TX

clk-acc-jit-N_UI-1E-9

p-p accumulated jitter out of 

transmitter over 0 <= n <= N UI 

where N=12, measured with 1E-9 

probability.

0

0.17

UI

T

Tx-data-clk-skew-pin

Delay of any data lane relative to 

clock lane, as measured at Tx 

output

-0.5

0.5

UI

V

Rx-diff-pp-pin

Voltage eye opening at the end of 

Tx+ channel for any data or clock 

channel measured with a 

cumulative probability of 1E-9 

(UI). 

225

1200

mV

T

Rx-diff-pp-pin

Timing eye opening at the end of 

Tx+ channel for any data or clock 

channel measured with a 

cumulative probability of 1E-9 (UI)

0.63

1

UI

T

Rx-data-clk-skew-pin

Delay of any data lane relative to 

the clock lane, as measured at the 

end of Tx+ channel. This 

parameter is a collective sum of 

effects of data clock mismatches 

in Tx and on the medium 

connecting Tx and Rx.

-1

3

UI

V

Rx-CLK

 

Forward CLK Rx input voltage 

sensitivity (differential pp)

180

mV

V

Rx-cm-dc-pin

DC common mode ranges at the 

Rx input for any data or clock 

channel

125

350

mV

V

Rx-cm-ac-pin

AC common mode ranges at the 

Rx input for any data or clock 

channel, defined as:
((V

D+

 + V

D-

/2 - V

RX-cm-dc-pin

)

-50

50

mV

2

V

Tx-diff-pp-pin

Transmitter differential swing

900

1400

mV

1

Z

TX_LOW_CM_DC

DC resistance of Tx terminations 

at half the single ended swing 

(which is usually 0.25*V

Tx-diff-pp-

pin

) bias point

37.4

50

Ω

Z

RX_LOW_CM_DC

DC resistance of Rx terminations 

at half the single ended swing 

(which is usually 0.25*V

Tx-diff-pp-

pin

) bias point

37.4

50

Ω

V

Tx-cm-dc-pin

Transmitter output DC common 

mode, defined as average of V

D+

 

and V

D-

0.23

0.27

Fraction of 

V

Tx-diff-pp-pin

4