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ComLink™ Series
CY2LL843
Document #: 38-07066 Rev. OBS
Page 9 of 13
Notes:
6.
All input pulses are supplied by a frequency generator with the following characteristics: tR and tF £ 1 nS; pulse rep. rate = 50 MppS; pulse width = 10 ± 0.2 nS.
7.
RL = 50 Ohm.
8.
CL includes instrumentation and fixture capacitance within 6 mm of the DUT.
9.
VOC measurement requires equipment with a 3 dB bandwidth of at least 300 MHz.
10. RL = 50 Ohm ±1%.
11. Point to Point: RL = 50 Ohm ±1% CL 3 pF.
A
B
R
Pulse
Generator
Y
Z
10 pF
DE
D
CL = 10pF
RL
0.0V
1
tR
tF
VI(A)
VI(B)
1.4V
1.0V
Figure 11. Test Circuit and Voltage Definitions
for the Differential Output Signal[[6],[7],[8]]
Y
Z
10 pF
DE
D
CL = 10pF
RL
A
B
R
Pulse
Generator
Voc (ss)
VDD
Voc (pp)
VI(A)
VI(B)
1.4V
1.0V
Figure 12. Test Circuit and Voltage Definitions for the
Driver Common-Mode Output Voltage[[6],[7],[8],[9]]
Y
Z
10 pF
10 pF
RL & RC
DE
A
B
R
Pulse
Generator
D
1.4 V
1.4 V
1.0 V
0V D iffe r en tial
1.2 V C M
1.2 V C M
VIA
V0Y
V0Z
T PL H
T PH L
1.0 V
VIB
0 V D iffe r e n tia l
0 V D iffe r e n tia l
80%
20%
V0 Y - V0 Z
tR
tF
Figure 13. Differential Receiver to Driver Propagation
Delay and Driver Transition Time[[6],[10],[11]]
Y
Z
CL =10 pF
DE
A
B
R
1.0 V or
1.2V
D
1.2V
TPZH
TPLZ
TPZH
1.2V
1.2V
1.0V
1.4V
1.25V
1.15V
2.0V
1.4V
V0Y or V0Z
V0Y or V0Z
DE
1.2V
0.8V
Figure 14. Test Circuit & Voltage Definitions for the Driver
Common-Mode Output Voltage[[6],[10]]
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