MAX3875A Datasheet, PDF (1/8 Pages) Maxim Integrated Products – 2.5Gbps, Low-Power, +3.3V Clock Recovery and Data Retiming IC

19-2362; Rev 1; 3/02
2.5Gbps, Low-Power, +3.3V
Clock Recovery and Data Retiming IC
General Description
The MAX3875A is a compact, low-power clock recov-
ery and data retiming IC for 2.488Gbps SDH/SONET
applications. The fully integrated phase-locked loop
recovers a synchronous clock signal from the serial
NRZ data input, which is retimed by the recovered
clock. Differential PECL-compatible outputs are provid-
ed for both clock and data signals, and an additional
2.488Gbps serial input is available for system loopback
diagnostic testing. The device also includes a TTL-
compatible loss-of-lock (LOL) monitor.
The MAX3875A is designed for both section-regenerator
and terminal-receiver applications in OC-48/STM-16
transmission systems. Its jitter performance exceeds all
of the SONET/SDH specifications.
This device operates from a single +3.3V to +5.0V supply
over a -40°C to +85°C temperature range. The typical
power consumption is only 400mW with a +3.3V supply. It is
available in a 32-pin TQFP package, as well as in die form.
Applications
SDH/SONET Receivers and Regenerators
Add/Drop Multiplexers
Digital Cross-Connects
2.488Gbps ATM Receiver
Digital Video Transmission
SDH/SONET Test Equipment
Features
o Exceeds ANSI, ITU, and Bellcore SONET/SDH
Regenerator Specifications
o 400mW Power Dissipation (at +3.3V)
o Clock Jitter Generation: 0.003UI_RMS
o Single +3.3V or +5V Power Supply
o Fully Integrated Clock Recovery and Data Retiming
o Additional High-Speed Input Facilitates System
Loopback Diagnostic Testing
o Tolerates >2000 Consecutive Identical Digits
o Loss-of-Lock Indicator
o Differential PECL-Compatible Data and Clock
Outputs
Ordering Information
PART
MAX3875AEHJ
MAX3875AE/D
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
32 TQFP
Dice*
* Dice are designed to operate over this range, but are tested
and guaranteed at T_A = +25°C only. Contact factory for
availability.
Pin Configuration appears at end of data sheet.
Typical Application Circuit
+3.3V
PHOTO-
DIODE
V_CC
0.01µF
0.01µF
MAX3866 OUT+
IN
PRE/POSTAMPLIFIER
LOP
OUT-
TTL
+3.3V
TTL
V_CC PHADJ+ PHADJ- LOL
SDO+
SDI+
SDO-
SDI- ^MAX3875A
SLBI-
SLBI+
SIS FIL+
SCLKO+
SCLKO-
FIL-
+3.3V
130Ω 130Ω
+3.3V
82Ω 82Ω ^+3.3V
MAX3885
130Ω 130Ω
1:16
DESERIALIZER
82Ω 82Ω
SYSTEM
LOOPBACK
TTL
1µF
________________________________________________________________ Maxim Integrated Products 1
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