User guide

The following table lists the characteristics generally associated with some logic
families. All values are nominal.
Table 18
Logic Family V
high
[V] V
low
[V] Ampl. [mV] Term. [V]
ECL - 0.95 - 1.7 750 - 2
SCFL 0 - 0.9 900 0
LVPECL + 2.35 + 1.6 750 + 1.3
LVDS + 1.425 + 1.075 350 + 1.250
CML 0 - 0.4 400 0
Terms:
•
ECL
Emitter Coupled Logic
•
SCFL
Source Coupled FET Logic
•
LVPECL
Low Voltage Positive Emitter Coupled Logic (PECL Lite)
•
LVDS
Low Voltage Differential Signaling
•
CML
Current Mode Logic
Why Incorrect Terminations Could Damage Your Device
Choosing wrong terminations may cause your device to output voltage levels that
are not as expected. It may also cause excessive current or current flow in the
wrong direction, which can damage your device.
Setting up the Pattern Generator 4
Agilent J-BERT N4903B High-Performance Serial BERT 129