MAX3747_07 Datasheet, PDF (1/10 Pages) Maxim Integrated Products – 155Mbps to 3.2Gbps, Low-Power SFP Limiting Amplifiers

19-3297; Rev 1; 10/07
EVAALVUAAILTAIOBNLEKIT _{155Mbps to 3.2Gbps, Low-Power SFP}
Limiting Amplifiers
General Description
The MAX3747/MAX3747A/MAX3747B multirate limiting
amplifiers function as data quantizers for OC-3 through
OC-48 synchronous 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 MAX3747 output voltage level is 500mV_P-P and the
MAX3747A/MAX3747B output voltages are 800mV_P-P.
The MAX3747B has enhanced LOS operation under over-
load conditions.
The MAX3747/MAX3747A/MAX3747B limiting amplifiers
feature a programmable loss-of-signal detect (LOS)
and an optional disable function (DISABLE) that can be
combined to implement squelch.
The MAX3747/MAX3747A/MAX3747B are available in a
3mm, 10-pin µMAX® package ideal for small form-
factor receivers.
Applications
Gigabit Ethernet SFP/SFF Optical Transceiver Modules
1G/2G Fibre-Channel SFP/SFF Optical Transceiver
Modules
Multirate OC-3 to OC-48 FEC SFP/SFF Optical
Transceiver Modules
10G LX4 Transceiver Modules
Features
♦ Pin Compatible with Micrel SY88993V
♦ 155Mbps to 3.2Gbps Operation
♦ > 57dB of Gain
♦ < 10^-12 BER with 2mV_P-P Input Amplitude
♦ 18mA Supply Current
♦ Chatter-Free LOS with Programmable Threshold
♦ Output DISABLE Function
♦ PECL-Compatible Inputs
Ordering Information
PART
MAX3747EUB
MAX3747AEUB
MAX3747BEUB
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-
PACKAGE
10 µMAX
10 µMAX
10 µMAX
PKG
CODE
U10C-4
U10C-4
U10C-4
µMAX is a registered trademark of Maxim Integrated Products, Inc.
Pin Configuration appears at end of data sheet.
Typical Application Circuit
3-INPUT
DIAGNOSTIC
MONITOR
DS1859
VCC
MAX4004
MAX3745
5-PIN TO-HEADER
SFP OPTICAL RECEIVER
SUPPLY FILTER
0.1μF
0.1μF
VCC
MAX3747
MAX3747A
IN+ ^MAX3747B
IN-
0.1μF
OUT+
0.1μF
OUT-
50Ω 50Ω
VREF TH
GND LOS DISABLE
RTH1
0.1μF
RTH2
0.1μF
HOST BOARD
HOST FILTER
VCC_RX
50Ω
SERDES
50Ω
4.7kΩ TO 10kΩ
VCC_HOST
LOS
VCC ^{RTH1 + RTH2 ≥ 5kΩ}
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.