NB7LQ572
VCC
VCC
VCC
VCC
LVPECL
Driver
Zo = 50 W
VT = VCC − 2.0 V
Zo = 50 W
NB7LQ572
IN
50 W
50 W
IN
CLKx
GND
GND
Figure 16. LVPECL Interface
LVDS
Driver
Zo = 50 W
VT = OPEN
Zo = 50 W
NB7LQ572
IN
50 W
50 W
IN
CLKx
GND
GND
Figure 17. LVDS Interface
VCC
VCC
VCC
VCC
CML
Driver
Zo = 50 W
VT = VCC
Zo = 50 W
NB7LQ572
IN
50 W
50 W
IN
Differential
Driver
Zo = 50 W
VT = VREFAC*
Zo = 50 W
NB7LQ572
IN
50 W
50 W
IN
GND
GND
Figure 18. Standard 50 W Load CML Interface
GND
GND
Figure 19. Capacitor−Coupled Differential
Interface (VT Connected to External VREFAC)
*VREFAC bypassed to ground with a 0.01 mF capacitor.
Q
Driver
Device
Q
ZO = 50 W
ZO = 50 W
50 W
D
Receiver
Device
D
50 W
VTT
VTT = VCC − 2.0 V
Figure 20. Typical Termination for Output Driver and Device Evaluation
(See Application Note AND8020/D − Termination of ECL Logic Devices)
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