EVALUATION KIT AVAILABLE
MAX3747A/MAX3747B
155Mbps to 3.2Gbps, Low-Power SFP
Limiting Amplifiers
General Description
Features
The MAX3747A/MAX3747B multirate limiting amplifiers
function as data quantizers for OC-3 through OC-48 syn-
chronous optical network (SONET), Fibre-Channel, and
Gigabit Ethernet optical receivers. They are pin-for-pin
compatible with the SY88993V from Micrel
Semiconductor, Inc. The amplifiers accept a wide range
of input voltages and provide constant-level, current-
mode logic (CML) output voltages with controlled edge
speeds. The MAX3747A/MAX3747B output voltages are
o Pin Compatible with Micrel SY88993V
o 155Mbps to 3.2Gbps Operation
o > 57dB of Gain
-
12
o < 10
BER with 2mV
Input Amplitude
P-P
o 18mA Supply Current
o Chatter-Free LOS with Programmable Threshold
o Output DISABLE Function
800mV . The MAX3747B has enhanced LOS operation
P-P
under overload conditions.
o PECL-Compatible Inputs
The MAX3747A/MAX3747B limiting amplifiers feature a
programmable loss-of-signal detect (LOS) and an
optional disable function (DISABLE) that can be com-
bined to implement squelch.
Ordering Information
The MAX3747A/MAX3747B are available in a 3mm, 10-
pin µMAX® package ideal for small form-
factor receivers.
PART
MAX3747AEUB+
MAX3747BEUB+
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
10 µMAX
10 µMAX
Applications
Gigabit Ethernet SFP/SFF Optical Transceiver Modules
1G/2G Fibre-Channel SFP/SFF Optical Transceiver
Modules
+Denotes a lead(Pb)-free/RoHS-compliant package.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
Multirate OC-3 to OC-48 FEC SFP/SFF Optical
Transceiver Modules
Pin Configuration appears at end of data sheet.
10G LX4 Transceiver Modules
Typical Application Circuit
SFP OPTICAL RECEIVER
HOST BOARD
3-INPUT
DIAGNOSTIC
MONITOR
SUPPLY FILTER
HOST FILTER
RX
V
CC
V
CC_
DS1859
MAX4004
V
CC
MAX3747A
MAX3747B
0.1µF
0.1µF
0.1µF
0.1µF
IN+
IN-
OUT+
OUT-
50Ω
SERDES
MAX3745
50Ω
5-PIN TO-HEADER
V
TH
GND LOS DISABLE
REF
50Ω
50Ω
4.7kΩ TO 10kΩ
V HOST
CC_
LOS
R
R
TH1
0.1µF
0.1µF
TH2
R
TH1
+ R ≥ 5kΩ
TH2
V
CC
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-0281; Rev 2; 8/12