MAX3676 Maxim, MAX3676 Datasheet
MAX3676
Manufacturer Part Number
MAX3676
Description
622Mbps / 3.3V Clock-Recovery and Data-Retiming IC with Limiting Amplifier
Manufacturer
Maxim
Datasheet
1.MAX3676.pdf
(16 pages)
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The MAX3676 is a complete clock-recovery and data-
retiming IC incorporating a limiting amplifier. It is intend-
ed for 622Mbps SDH/SONET applications and operates
from a single +3.3V supply.
The MAX3676 is designed for both section-regenerator
and terminal-receiver applications in OC12/STM-4 trans-
mission systems. Its jitter performance exceeds all
SONET/SDH specifications.
The MAX3676 has two differential input amplifiers: one
accepts positive-referenced emitter-coupled logic
(PECL) levels, while the other accepts small-signal ana-
log levels. The analog inputs access the limiting amplifi-
er stage, which provides both a received-signal-strength
indicator (RSSI) and a programmable-threshold loss-of-
power (LOP) monitor. Selecting the PECL amplifier dis-
ables the limiting amplifier, conserving power. A
loss-of-lock (LOL) monitor is also incorporated as part of
the fully integrated phase-locked loop (PLL).
________________________Applications
19-1537; Rev 0; 7/99
_____________________ General Description
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
___________________________________________________ Typical Operating Circuit
SDH/SONET Receivers and Regenerators
SDH/SONET Access Nodes
Add/Drop Multiplexers
ATM Switches
Digital Cross-Connects
PHOTO-
DIODE
100pF
________________________________________________________________ Maxim Integrated Products
Data-Retiming IC with Limiting Amplifier
FILT
INREF
IN
GND
MAX3664
COMP
+3.3V
V
OUT+
CC
OUT-
220pF
622Mbps, 3.3V Clock-Recovery and
0.01 F
Z
Z
O
O
= 50
= 50
100
+3.3V
0.01 F
0.01 F
47nF
C
C
C
IN
IN
F
0.1 F
CFILT OLC+ OLC-
DDI+
DDI-
ADI+
ADI-
V
CC
INSEL
+3.3V
C
PHADJ+ PHADJ-
33nF
OLC
____________________________Features
_________________Ordering Information
*Contact factory for availability. Dice are designed to operate
Pin Configuration appears at end of data sheet.
over a -40°C to +140°C junction temperature (T
tested and guaranteed at T
GND
MAX3676EHJ
MAX3676E/D
Single +3.3V or +5.0V Power Supply
Exceeds ITU/Bellcore SDH/SONET Regenerator
Specifications
Low Power: 237mW at +3.3V
Selectable Data Inputs, Differential PECL or
Analog
Received-Signal-Strength Indicator
Loss-of-Power and Loss-of-Lock Monitors
Differential PECL Clock and Data Outputs
No External Reference Clock Required
MAX3676
PART
RSSI
FIL+
INV
2.2 F
20k
R1
R2
FIL-
VTH LOP
SCLKO+
SCLKO-
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
SDO+
SDO-
LOL
j
= +45°C.
Z
Z
Z
Z
O
O
C
0.01 F
O
O
= 50
= 50
LOL
= 50
= 50
82
82
130
130
5mm 32 TQFP
Dice*
PIN-PACKAGE
+3.3V
+3.3V
82
82
j
) range, but are
130
130
1
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