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Table 5.1 Physical Layer Electrical Requirements (2/3)
b) Transmitter Specifications
Units Nom Min Max Comments
Z
diffTX,
TX Pair Differential
Impedance
Ohm 85 115
Z
s-eTX,
TX Single-Ended
Impedance
Ohm 40
c) Transmitted Signal Requirements
Units Nom Min Max Comments
V
diffTX,
TX Differential
Output Voltage
mVppd 500 400 600
Differential
nominal measured
at Serial ATA
connector on
transmit side
(+/-250mV
differential@seria
l ATA connector)
t
20-80TX,
TX Rise/Fall Time
ps
(UI)
0.15
(20-80%)
0.41
(20-80%)
Rise: 20%-80% at
transmitter
Fall: 80%-20% at
transmitter
t
skewTX,
TX Differential Skew
ps 20
TJ at Connector,
Data-Data, 5UI
UI 0.355
DJ at Connector,
Data-Data, 5UI
UI 0.175
TJ at Connector,
Data-Data, 250UI
UI 0.47
DJ at Connector,
Data-Data, 250UI
UI 0.22
5-8 C141-E249