afbr-79q4ekz Avago Technologies, afbr-79q4ekz Datasheet - Page 6

• Manufacturer Part Number: afbr-79q4ekz
• Description: 40 Gigabit Ethernet 40gbase-sr4 Qsfp+ Pluggable, Parallel Fiber-optics Module
• Manufacturer: Avago Technologies

Transmitter Electrical Characteristics
The following characteristics are defined over the Recommended Operating Conditions unless otherwise noted. Typical
values are for Tc = 40°C, Vcc = 3.3 V
*
Note:
1. LOS Hysteresis is defined as 20*Log(LOS De-assert Level / LOS Assert Level).
2. The single ended input voltage tolerance is the allowable range of the instantaneous input signals
Figure 3. Electrical Eye Mask Coordinates at Hit ratio 5 x 10
6
Parameter
LOS Assert Threshold: Tx Data Input
Differential Peak-to-Peak Voltage
Swing
LOS Hysteresis
Parameter
(From Table 86A-2 of IEEE 802.3ba)
Single ended input voltage
tolerance
AC common mode input voltage
tolerance
Differential input return loss
Differential to common-mode
input return loss
J2 Jitter tolerance
J9 Jitter tolerance
Data Dependent Pulse Width
Shrinkage (DDPWS) tolerance
Eye Mask Coordinates:
Y1, Y2
X1, X2
See Figure 6 for Test Point definitions.
-Y1
-Y2
Y2
Y1
0
0
[2]
X1
X2
Time (UI)
1-X2
Symbol
'Vdi pp los
Test Point*
TP1a
TP1a
TP1
TP1
TP1a
TP1a
TP1a
TP1a
1-X1
-5
hits per sample
86A.4.1.1
See IEEE
802.3ba
1
0.17
0.29
0.07
Min
Min
-0.3
0.5
50
15
10
SPECIFICATION VALUES
0.11, 0.31
95, 350
Typ
Typ
Max
Max
4
4
mVpp
Units
Units
mV
mV
dB
dB
dB
UI
UI
UI
UI
V
Notes
1
Notes/Conditions
Referred to TP1 signal
common
RMS
10 MHz to 11.1 GHz
10 MHz to 11.1 GHz
Defined in IEEE 802.3ba spec
Defined in IEEE 802.3ba spec
Hit Ratio = 5x10
-5