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M02046-15
3.3/5V Limiting Amplifier for Applications from 100 Mbps to 1.25 Gbps
Rev V4
Applications
• 1.06 Gbps Fibre Channel
• 1.25 Gbps Ethernet
• 1.25 Gbps SDH/SONET
• SDH/SONET 155 Mbps Transceivers
• FTTx and Media Converters
• Fast Ethernet Receivers
• FDDI 125 Mbps Receivers
• ESCON Receivers
Features
• Pin compatible with the MC2046-2
• Operates with a 3.3V or 5V supply
• 2.8 mV typical input sensitivity at 1.25 Gbps
• Programmable input-signal level detect
• On-chip DC offset cancellation circuit
• CMOS and PECL Signal Detect output variants
• Output Jam Function
• Low power (< 200 mW (M02046-15) at 3.3V including PECL load)
The M02046 is a highly integrated high-gain limiting amplifier that can be used with the same board layout and foot-
print as the MC2046-2 (refer to 02046-APP-004-X where X is the revision which will change if the application note is
revised). Featuring PECL outputs, the M02046 is intended for use in applications from 100 Mbps to 1.25 Gbps. Full
output swing is achieved even at minimum input sensitivity. The M02046 can operate with a 3.3V or 5V supply.
Included in the M02046 is a programmable signal-level detector, allowing the user to set thresholds at which the
logic outputs are enabled. The signal detect function has typically 2 dB (optical) of hysteresis which prevents chatter
at low input levels. A squelch function, which turns off the output when no signal is present, is provided by externally
connecting the LOS Status output to the JAM input.
The M02046-15 has a CMOS Status output and the M02046-25 has a PECL Status output. Both versions have a
CMOS LOS output.
Other available solutions: M02040-15 3.3/5V Limiting Amplifier for Applications to 2.125 Gbps (PECL outputs)
M02050-15 3.3/5V Limiting Amplifier for Applications to 2.5 Gbps (PECL outputs)
M02049-15 3.3/5V Limiting Amplifier for Applications to 4.3 Gbps (CML outputs)
M02043-15 3.3/5V Limiting Amplifier for Applications to 4.3 Gbps (CML outputs)
Typical Applications Diagram
12.1 kΩ
+3.3 V
Photodiode
AC-Coupled
to TIA
DINP
MT02I0A16
MON
DINN
VTT
IREF
Biasing
Limiting
Amplifier
Jam optional
Output
Buffer
PECLP
PECLN
Clock Data
Recovery
Unit
Offset cancel
Level
Detect
Comparator
Threshold
Setting
Circuit
Regulator
ST
LOS
AC or DC Coupled
(as described in
Applications Information)
STSET
R ST
VCC3 VCC
1
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice.
Visit www.macom.com for additional data sheets and product information.
For further information and support please visit:
http://www.macom.com/support

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M02046-15
3.3/5V Limiting Amplifier for Applications from 100 Mbps to 1.25 Gbps
Rev V4
Ordering Information
Part Number
Package
M02046-15*
CMOS Status Output (CMOS LOS Output) in QSOP16 package
M02046-25*
PECL Status Output (CMOS LOS Output) in QSOP16 package
M02046-15EVM
Evaluation board with M02046-15 (CMOS Status Output)
M02046-25EVM
Evaluation board with M02046-25 (PECL Status Output)
* The letter “G” designator after the part number indicates that the device is RoHS-compliant.
Operating Temperature
–40 °C to 85 °C
–40 °C to 85 °C
–40 °C to 85 °C
–40 °C to 85 °C
Revision History
Revision
Level
V4
G (V3)
Final
Final
F (V2)
Final
E (V1)
Final
D Preliminary
Date
May 2015
October 2007
July 2005
June 2005
April 2005
Description
Updated logos and page layout. No content changes.
Updated front page description to make it clear the part supports data rates down to 100 Mbps.
Update Section 4.1.3 describing input ac-coupling capacitor selection.
Correct Jam connection in block diagram and typical applications figures. Correct IREF figure
(reference current generation).
In the DC specifications, update RINDIFF and added note 4. In the ac specifi-cations update VLOS and
DJ. Updated RST values and the typical LOS curve (Figure 4-2 - Figure 4-4). Added typical hysteresis
curve (Figure 4-5).
Corrected the ASIC revision number in this table. Update the Absolute Maximum specification for
I(LOS) and I(STCMOS). Add the following DC specification: IOL_CMOS.
2
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice.
Visit www.macom.com for additional data sheets and product information.
For further information and support please visit:
http://www.macom.com/support

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M02046-15
3.3/5V Limiting Amplifier for Applications from 100 Mbps to 1.25 Gbps
Rev V4
Typical Eye Diagram
10 mVPP differential input
1.25 Gbps
160 mV/div
140 ps/div
Pin Configuration
STSET
VCC3
GND
DINP
DINN
NC
VCC3
JAM
1
2
3
4
5
6
7
8
M02046-x5
Date Code
16 I REF
15 NC
14 VCC
13 PECLP
12 PECLN
11 GND
10 ST
9 LOS
Note: x is either a 1 or 2 as explained in the order-
ing information above
3
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice.
Visit www.macom.com for additional data sheets and product information.
For further information and support please visit:
http://www.macom.com/support