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RTL8111

INTEGRATED GIGABIT ETHERNET CONTROLLER FOR PCI EXPRESS™ APPLICATIONS

Realtek Semiconductor 

RTL8111

Datasheet

7.7.2. Differential Receiver Parameters

Table 18. Differential Receiver Parameters

Symbol

Parameter

Min. Typical Max. Units

UI

Unit Interval

399.88

400 400.12 ps

VRX-DIFFp-p

Differential Input Peak to Peak Voltage

0.175

1.200 V

TRX-EYE

Minimum Receiver Eye Width

0.4

UI

TRX-EYE-MEDIAN-to-

Maximum time between the jitter median and maximum

0.3

UI

MAX-JITTER

deviation from the median

VRX-CM-ACp

AC Peak Common Mode Input Voltage

150 mV

RLRX-DIFF

Differential Return Loss

15

dB

RLRX-CM

Common Mode Return Loss

6

dB

ZRX-DIFF-DC

DC Differential Input Impedance

80

100

120

Ω

ZRX--DC

DC Input Impedance

40

50

60

Ω

ZRX-HIGH-IMP-DC

Powered Down DC Input Impedance

200 k

Ω

VRX-IDLE-DET-DIFFp-p Electrical Idle Detect Threshold

65

175 mV

TRX-IDLE-DET-

Unexpected Electrical Idle Enter Detect Threshold

10

ms

DIFFENTERTIME

Integration Time

LRX-SKEW

Total Skew

20

ns

Note: Refer to PCI Express Base Specification, rev.1.0a, for correct measurement environment setting of each parameter.

7.7.3. REFCLK Parameters

Table 19. REFCLK Parameters

Symbol

Parameter

100MHz Input

Units

Min

Max

Tabsmin

Trise

Tfall

h∆ Trise

∆ Tfall

Rise/Fall Matching

Absolute min. DIF CLK Period

Rise Time

Fall Time

Rise Time Variation

Fall Time Variation

9.872

ns

175

700

ps

175

700

ps

125

ps

125

ps

20

%

Vhigh

Vlow

Vcross absolute

Vcross relative

Total ∆ Vcross

Tccjitter

Duty Cycle

Voltage High (typical 0.71V)

Voltage Low (typical 0.0V)

Absolute Crossing Point Voltages

Relative Crossing Point Voltages

Total Variation of Vcross over all edges

Cycle to Cycle Jitter

660

850

mV

-150

mV

250

550

mV

Note2

Note2

V

140

mV

125

ps

45

55

%

Vovs

Maximum Voltage (Overshoot)

Vhigh_avg + 0.3

V

Vuds

Minimum Voltage (Undershoot)

-0.3

V

Vrb

Ringback Voltage

0.2

N/A

V

Note 1: Refer to PCI Express Base Specification, rev.1.0a, for correct measurement environment setting of each parameter.

Note 2: Vcross relative Min = 0.5(Vhigh_avg – 0.710) + 0.250, Vcross relative Max = 0.5(Vhigh_avg – 0.710) + 0.550. The crossing point

must meet the absolute and relative crossing point specifications simultaneously.

Note 3: The nominal single-ended swing for each clock is 0 to 0.7V with a nominal frequency of 100MHz ±300 PPM.

Note 4: The reference clocks may support spread spectrum clocking. The minimum clock period cannot be violated.

Integrated Gigabit Ethernet Controller for PCI Express 20

Track ID: JATR-1076-21 Rev. 1.2

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