September 2006
rev 0.2
PCS2P5T915A
Differential AC Timing Waveforms
1/fo
tw
tw
VIH
A
A
VTHI
VIL
VIH
VTHI
VIL
tPLH
tPHL
Qn
Qn
VOH
VOX
VOL
tSK(O)
tSK(O)
Qm
Qm
VOH
VOX
VOL
HSTL and eHSTL Output Propagation and Skew Waveforms
1/fo
tw
tw
VIH
A
A
VTHI
VIL
VIH
VTHI
VIL
tPLH
tPHL
VOH
VTHO
Qn
Qn
VOL
comp tPHL
comp tPLH
VOH
VTHO
VOL
tSK(O)
tSK(O)
VOH
Qm
VTHO
VOL
tSK(O)
tSK(O)
VOH
Qm
VTHO
VOL
1.8V or 2.5V LVTTL Output Propagation and Skew Waveforms
Notes: 1. For the HSTL and eHSTL outputs, tPHL and tPLH are measured from the input passing through VTHI or input pair crossing to the crossing point of each
Qn and Qn.
2. For 1.8V and 2.5V LVTTL outputs, tPHL and tPLH are measured from the input passing through VTHI or input pair crossing to the slower of Qn or Qn
passing through VTHO
.
3. Pulse skew is calculated using the following expression:
SK(P) = | tPHL - tPLH
t
|
where tPHL and tPLH are measured on the controlled edges of any one output from the rising and falling edges of a single pulse. Note that the tPHL and
tPLH shown above are not valid measurements for this calculation because they are not taken from the same pulse.
Low Voltage (2.5V) High Accuracy 1:5 Clock Fan-Out Buffer
15 of 23
Notice: The information in this document is subject to change without notice.
PULSECORE [ PulseCore Semiconductor ]
