MAX3748 Maxim, MAX3748 Datasheet
MAX3748
Manufacturer Part Number
MAX3748
Description
Compact 155Mbps to 3.2Gbps Limiting Amplifier
Manufacturer
Maxim
Datasheet
1.MAX3748.pdf
(11 pages)
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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
package with an exposed pad.
*Future product—contact factory for availability.
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.
Typical Operating Circuits continued at end of data sheet.
Gigabit Ethernet SFF/SFP Transceiver Modules
Fibre Channel SFF/SFP Transceiver Modules
Multirate OC-3 to OC-48-FEC SFF/SFP
Transceiver Modules
4-PIN TO HEADER
________________________________________________________________ Maxim Integrated Products
3-INPUT DIAGNOSTIC
MONITOR
DS1858
General Description
MAX3744 TIA*
3kΩ
R1
Applications
✕
3mm 16-pin QFN
C1
0.1µF
IN+
IN-
RSSI
SFP OPTICAL RECEIVER
OUTPOL
MAX3748A
MAX3748/
Compact 155Mbps to 3.2Gbps
*FUTURE PRODUCT.
TH
R
TH
GND
V
CC
o SFP Reference Design Available
o 16-Pin QFN Package with 3mm
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 8.5ps
*EP = Exposed pad.
Functional Diagram and Pin Configuration appear at end of
data sheet.
MAX3748ETE
MAX3748AETE
CAZ1 CAZ2
DISABLE
PART
0.1µF
LOS
OUT+
P-P
OUT-
SUPPLY FILTER
Deterministic Jitter (3.2Gbps)
Limiting Amplifier
Typical Operating Circuits
0.1µF
0.1µF
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
Ordering Information
4.7kΩ TO 10kΩ
50Ω
50Ω
HOST BOARD
HOST FILTER
V
PIN-
PACKAGE
16 QFN-EP*
16 QFN-EP*
V
LOS
CC
CC
SERDES
_RX
_HOST
✕
3mm Footprint
Features
PACKAGE
T1633-3
T1633-3
CODE
1
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