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MAX3748 Datasheet(PDF) 1 Page - Maxim Integrated Products

Part No. MAX3748
Description  Compact 155Mbps to 3.2Gbps Limiting Amplifier
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Maker  MAXIM [Maxim Integrated Products]
Homepage  http://www.maxim-ic.com
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MAX3748 Datasheet(HTML) 1 Page - Maxim Integrated Products

 
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General Description
The MAX3748/MAX3748A multirate limiting amplifier func-
tions as a data quantizer for SONET, Fibre Channel, and
Gigabit Ethernet optical receivers. The amplifier accepts
a wide range of input voltages and provides constant-
level current-mode logic (CML) output voltages with con-
trolled edge speeds.
A received-signal-strength indicator (RSSI) is available
when the MAX3748/MAX3748A is combined with the
MAX3744 SFP transimpedance amplifier (TIA). A receiver
consisting of the MAX3744* and the MAX3748/
MAX3748A can provide up to 19dB RSSI dynamic range.
Additional features include a programmable loss-of-signal
(LOS) detect, an optional disable function (DISABLE),
and an output signal polarity reversal (OUTPOL). Output
disable can be used to implement squelch.
The combination of the MAX3748/MAX3748A and the
MAX3744 allows for the implementation of all the small-
form-factor SFF-8472 digital diagnostic specifications
using a standard 4-pin TO-46 header. The MAX3748/
MAX3748A is packaged in a 3mm 3mm 16-pin QFN
package with an exposed pad.
*Future product—contact factory for availability.
Applications
Gigabit Ethernet SFF/SFP Transceiver Modules
Fibre Channel SFF/SFP Transceiver Modules
Multirate OC-3 to OC-48-FEC SFF/SFP
Transceiver Modules
Features
o SFP Reference Design Available
o 16-Pin QFN Package with 3mm 3mm Footprint
o Single +3.3V Supply Voltage
o 86ps Rise and Fall Time
o Loss of Signal with Programmable Threshold
o RSSI Interface (with MAX3744 TIA)
o Output Disable
o Polarity Select
o 8.5psP-P Deterministic Jitter (3.2Gbps)
Compact 155Mbps to 3.2Gbps
Limiting Amplifier
________________________________________________________________ Maxim Integrated Products
1
Ordering Information
MAX3748/
MAX3748A
MAX3744 TIA*
DS1858
3-INPUT DIAGNOSTIC
MONITOR
R1
3k
C1
0.1
µF
IN+
IN-
RSSI
TH
DISABLE
LOS
0.1
µF
OUTPOL
CAZ1
CAZ2
VCC
GND
4.7k
Ω TO 10kΩ
LOS
VCC_HOST
OUT+
50
0.1
µF
OUT-
50
0.1
µF
SERDES
RTH
SUPPLY FILTER
HOST FILTER
VCC_RX
4-PIN TO HEADER
HOST BOARD
SFP OPTICAL RECEIVER
*FUTURE PRODUCT.
Typical Operating Circuits
19-2717; Rev 1; 7/03
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.
EVALUATION
KIT
AVAILABLE
PART
TEMP RANGE
PIN-
PACKAGE
PACKAGE
CODE
MAX3748ETE
-40°C to +85°C
16 QFN-EP*
T1633-3
MAX3748AETE
-40°C to +85°C
16 QFN-EP*
T1633-3
*EP = Exposed pad.
Functional Diagram and Pin Configuration appear at end of
data sheet.
Typical Operating Circuits continued at end of data sheet.


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