Datasheet

MAX3747A/MAX3747B
155Mbps to 3.2Gbps, Low-Power SFP
Limiting Amplifiers
4
Maxim Integrated
MAX3747A
MAX3747B
V
CC
I
CC
(SUPPLY
CURRENT)
I
OUT
(CML OUTPUT
CURRENT)
50
I
50I
Figure 1. Power-Supply Current Measurement
6dB
1dB
0V
V
IN
TIME
SIGNAL_ON
SIGNAL_OFF
MAXIMUM DEASSERT LEVEL FOR A GIVEN V
TH
MINIMUM ASSERT LEVEL FOR A GIVEN V
TH
MAXIMUM POWER-DETECT WINDOW
Figure 2A. LOS Deassert Threshold—Set 1dB Below Receiver
Sensitivity
6dB
0V
V
IN
TIME
SIGNAL_ON = 1.2V
P-P
(OVERLOAD)
SIGNAL_OFF
MAXIMUM DEASSERT LEVEL FOR A GIVEN R
TH1
/R
TH2
RATIO
MINIMUM ASSERT LEVEL FOR A GIVEN R
TH1
/R
TH2
RATIO
MAXIMUM POWER-DETECT WINDOW
Figure 2B. LOS Deassert Threshold—Operating at Input
Overload