Input Receiver Characteristics

Table 12-2 on this page lists the input receiver characteristics. The receiver Eye Diagram in Figure 12-16 on page 481 illustrates some of the parameters listed in Table 12-2.

Table 12-2. Input Receiver Characteristics

Item	Max.	Min.	Units	Notes
UI	400.12	399.88	ps	Unit Interval =the bit time. 400ps nominal.
TRX-EYE		0.4	UI	Minimum eye width from which maximum jitter is derived. JT = 1 - TRX-EYE
JT	0.6		UI	Maximum jitter spec.
VRX-DIFFp-p	1200	175	mV	Peak-to-peak differential voltage sensitivity of receiver.
VRX-DIFFp	600	88	mV	Half of VRX-DIFFp-p.
VRX-IDLE-DET-DIFFp-p	175	65	mV	This is the electrical Idle detect threshold voltage. Any voltage less than 65mV peak-to-peak implies that the Link is in electrical Idle.
ZRX-DIFF-DC	120	80	Ohms	Receiver DC differential mode impedance. 100 Ohms nominal.
ZRX--DC	60	40	Ohms	Requires minimum D+ and D- line impedance during all power states.
ZRX--HIGH-IMP-DC		200k	Ohms	Requires minimum D+ and D- line impedance when the receiver terminations do not have power (e.g., in the L2 low power state, or during Fundamental Reset).
LRX-SKEW	20		ns	Lane-to-Lane skew that a receiver must be able to compensate for.