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Intel
®
IXF1104 4-Port Gigabit Ethernet Media Access Controller
135
Datasheet
Document Number: 278757
Revision Number: 009
Revision Date: 27-Oct-2005
7.1.1
Undershoot / Overshoot Specifications
The overshoot figures given in this section represent the maximum voltage that can be applied
without affecting the reliability of the device (see
Table 44
).
Caution:
If these limits are exceeded, damage to the device will occur.
7.1.2
RGMII Electrical Characteristics
The RGMII signals (including MDIO/MDC) are based on 2.5V CMOS interface voltages, as
defined by JEDEC EIA/JESD8-5 (see
Table 45
).
Receiver common
mode voltage range
RxCMV
–
900
1275
1650
mV
–
Receiver termination
impedance
RxZ
–
40
51
62.5
Ω
–
Signal detect level
RxSigDet
–
50
125
200
mVp-pdiff –
Table 43. SerDes Receive Characteristics
Parameter
Symbol
Normalized
Power
Drive
Settings
Min
Typ
Max
Units
Comments
Receiver differential
voltage requirement at
center of receive eye
RxDiffV
–
200
–
–
mVp-p diff –
Receiver common
mode voltage range
RxCMV
–
900
1275
1650
mV
–
Receiver termination
impedance
RxZ
–
40
51
62.5
Ω
–
Signal detect level
RxSigDet
–
50
125
200
mVp-pdiff
–
Table 42. SerDes Transmit Characteristics (Sheet 2 of 2)
Parameter
Symbol
Normalized
Power
Drive
Settings
1
Min
Typ
Max
Units
Comments
1. Refer to
Section 5.6.2.2, “Transmitter Programmable Driver-Power Levels” on page 104
.
Table 44. Undershoot / Overshoot Limits
Pin Type
Undershoot
Overshoot
2.5 V CMOS
-0.60 V
3.9 V
3.3 V LVTTL
-0.60 V
3.9 V