MAX3747 Datasheet, PDF (1/10 Pages) Maxim Integrated Products – 155Mbps to 3.2Gbps, Low-Power SFP Limiting Amplifiers

19-3297; Rev 0; 5/04
155Mbps to 3.2Gbps, Low-Power SFP
Limiting Amplifiers
General Description
The MAX3747/MAX3747A 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 MAX3747 output voltage level is 500mVp-p
and the MAX3747A output voltage is 800mVp-p.
The MAX3747/MAX3747A limiting amplifiers feature a
programmable loss-of-signal detect (LOS) and an
optional disable function (DISABLE). Output disable can
be used to implement squelch.
The MAX3747/MAX3747A 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 for the MAX3747 and MAX3747A
♦ <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
TEMP RANGE ^PIN-
PACKAGE
PKG
CODE
MAX3747EUB -40°C to +85°C 10 µMAX
MAX3747AEUB -40°C to +85°C 10 µMAX
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
IN+ MAX3747A
IN-
0.1µF
OUT+
0.1µF
OUT-
50Ω 50Ω
VREF
TH
GND LOS DISABLE
R1
HOST BOARD
HOST FILTER
VCC_RX
50Ω
SERDES
50Ω
4.7kΩ TO 10kΩ
VCC_HOST
LOS
0.1µF
R2
0.1µF
R1 + R2 ≥ 5kΩ
VCC
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.