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MAX3873A Datasheet(PDF) 1 Page - Maxim Integrated Products

Part No. MAX3873A
Description  Low-Power, Compact 2.5Gbps/2.7Gbps Clock-Recovery and Data-Retiming IC
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Maker  MAXIM [Maxim Integrated Products]
Homepage  http://www.maxim-ic.com
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MAX3873A Datasheet(HTML) 1 Page - Maxim Integrated Products

 
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General Description
The MAX3873A is a compact, low-power 2.488Gbps/
2.67Gbps clock-recovery and data-retiming IC for
SDH/SONET applications. The phase-locked loop (PLL)
recovers a synchronous clock signal from the serial
NRZ data input. The input data is then retimed by this
recovered clock, providing a clean data output. The
MAX3873A meets all SDH/SONET jitter specifications,
does not require an external reference clock to aid in
frequency acquisition, and provides excellent tolerance
to both deterministic and sinusoidal jitter. The
MAX3873A provides a PLL loss-of-lock (
LOL) output to
indicate whether the CDR is in lock. The recovered data
and clock outputs are CML with on-chip 50Ω back termi-
nations on each line. The clock output can be powered
down if not used.
The MAX3873A is implemented in Maxim’s second-
generation SiGe process and consumes only 260mW at
3.3V supply (output clock disabled, low output swing). The
device is available in a 4mm x 4mm 20-pin QFN
exposed-pad package and operates from -40°C to +85°C.
Applications
Switch Matrix Backplanes
SDH/SONET Receivers and Regenerators
Add/Drop Multiplexers
Digital Cross-Connects
SDH/SONET Test Equipment
DWDM Transmission Systems
Features
♦ Fully Integrated Clock Recovery and Data
Retiming
♦ Power Dissipation: 260mW with +3.3V Supply
♦ Clock Jitter Generation: 5mUIRMS
♦ Exceeds ANSI, ITU, and Bellcore SDH/SONET
Jitter Specifications
♦ Differential Input Range: 50mVP-P to 1.6VP-P
♦ Single +3.3V Power Supply
♦ PLL Fast Track (FASTRACK) Mode Available
♦ Clock Output Can Be Disabled
♦ Input Data Rate: 2.488Gbps or 2.67Gbps
♦ Selectable Output Amplitude
♦ Tolerates 2000 Consecutive Identical Digits
♦ Loss-of-Lock Indicator
♦ Differential CML Data and Clock Outputs
♦ Operating Temperature Range: -40°C to +85°C
Low-Power, Compact 2.5Gbps/2.7Gbps
Clock-Recovery and Data-Retiming IC
________________________________________________________________ Maxim Integrated Products
1
19-2577; Rev 1; 5/03
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.
Ordering Information
Typical Application Circuit appears at end of data sheet.
11
12
13
14
15
**NOTE: THE EXPOSED PAD MUST BE
SOLDERED TO THE SUPPLY GROUND.
SCLKO-
SCLKO+
VCC_BUF
SDO-
SDO+
5
4
3
2
1
VCC
SDI-
SDI+
VCC
RATESET
MAX3873A
QFN**
TOP VIEW
Pin Configuration
PART
TEMP RANGE
PIN-
PACKAGE
PKG
CODE
MAX3873AEGP
-40°C to +85°C
20 QFN
(4mm x 4mm)
G2044


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