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MAX3874 Datasheet

  • MAX3874

  • 2.488Gbps/2.667Gbps Clock and Data Recovery with Limiting Am...

  • Maxim   Maxim

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198-2710; Rev 0; 2/03
KIT
ATION
EVALU
BLE
AVAILA
2.488Gbps/2.667Gbps Clock and
Data Recovery with Limiting Amplifier
Features
o
2.488Gbps and 2.667Gbps Input Data Rates
o
Reference Clock Not Required for Data
Acquisition
o
Exceeds ANSI, ITU, and Bellcore SONET/SDH
Jitter Specifications
o
2.7mUI
RMS
Clock Jitter Generation
o
10mV
P-P
Input Sensitivity Without Threshold
Adjust
o
0.65UI
P-P
High-Frequency Jitter Tolerance
o
鹵170mV Wide Input Threshold Adjust Range
o
Clock Holdover Capability Using Frequency-
Selectable Reference Clock
o
Serial Loopback Input Available for System
Diagnostic Testing
o
Loss-of-Lock (LOL) Indicator
o
Small 5mm
鉁?/div>
5mm 32-Pin QFN Package
General Description
The MAX3874 is a compact, dual-rate clock and data
recovery with limiting amplifier for OC-48 and OC-48
with FEC SONET/SDH applications. Without using an
external reference clock, the fully integrated 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. An additional serial input (SLBI鹵) is available for
system-loopback diagnostic testing. Alternatively, this
input can be connected to a reference clock to maintain
a valid clock output in the absence of data transitions.
The device also includes a loss-of-lock (LOL) output.
The MAX3874 contains a vertical threshold control to
compensate for optical noise due to EDFAs in DWDM
transmission systems. The recovered data and clock
outputs are CML with on-chip 50鈩?back termination on
each line. Its jitter performance exceeds all SONET/
SDH specifications. The MAX3874A is the MAX3874
with a voltage-controlled oscillator (VCO) centered at
2.0212GHz.
The MAX3874 operates from a single +3.3V supply and
typically consumes 580mW. It is available in a 5mm
鉁?/div>
5mm 32-pin QFN with exposed pad package and oper-
ates over the -40擄C to +85擄C temperature range.
MAX3874
Ordering Information
PART
MAX3874EGJ
MAX3874AEGJ**
TEMP RANGE
-40擄C to +85擄C
-40擄C to +85擄C
PIN-
PACKAGE
32 QFN-EP*
32 QFN-EP*
PKG
CODE
G3255-1
G3255-1
Applications
SONET/SDH Receivers and Regenerators
Add/Drop Multiplexers
Digital Cross-Connects
SONET/SDH Test Equipment
DWDM Transmission Systems
Access Networks
*EP
= Exposed pad.
**Contains
a VCO centered at 2.0212GHz.
Pin Configuration appears at end of data sheet.
Typical Application Circuit
+3.3V
C
FIL
0.068碌F
V
CC
FILTER
OUT+
2.488Gbps DATA
SDI-
SLBI+
GND
+3.3V
V
CTRL
V
REF
*FUTURE PRODUCT
2.488Gbps SYSTEM
LOOPBACK DATA
SIS
LREF
+3.3V
LOL
RATESET
GND
SLBI-
+3.3V
CAZ
0.1碌F
+3.3V
FIL VCC_VCO CAZ-
SDI+
SDO+
SDO-
CML
+3.3V
CAZ+ FREFSET V
CC
MAX3745*
OUT-
IN
MAX3874
SCLKO+
SCLKO-
CML
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim鈥檚 website at www.maxim-ic.com.

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