MAX3675 Datasheet, PDF (1/16 Pages) Maxim Integrated Products – 622Mbps, Low-Power, 3.3V Clock-Recovery and Data-Retiming IC with Limiting Amplifier

19-1258; Rev 2; 11/98
EVALUAATVIOANILKAIBTLMEANUAL
622Mbps, Low-Power, 3.3V Clock-Recovery
and Data-Retiming IC with Limiting Amplifier
_____________________General Description
The MAX3675 is a complete clock-recovery and data-
retiming IC incorporating a limiting amplifier. It is
intended for 622Mbps SDH/SONET applications and
operates from a single +3.3V supply.
The MAX3675 has two differential input amplifiers: one
accepts PECL levels, while the other accepts small-sig-
nal analog levels. The analog inputs access the limiting
amplifier stage, which provides both a received-signal-
strength indicator (RSSI) and a programmable-threshold
loss-of-power (LOP) monitor. Selecting the PECL amplifier
disables the limiting amplifier, conserving power. A loss-
of-lock (LOL) monitor is also incorporated as part of the
fully integrated PLL.
____________________________Features
o Single +3.3V or +5.0V Power Supply
o Complies with ANSI, ITU, and Bellcore
SDH/SONET Specifications
o Low Power: 215mW at +3.3V
o Selectable Data Inputs, Differential PECL or
Analog
o Received-Signal-Strength Indicator (RSSI)
o Loss-of-Power and Loss-of-Lock Monitors
o Differential PECL Clock and Data Outputs
o No External Reference Clock Required
________________________Applications _________________Ordering Information
SDH/SONET Transmission Systems
SDH/SONET Access Nodes
PART
MAX3675ECJ
TEMP. RANGE
-40°C to +85°C
PIN-PACKAGE
32 TQFP
Add/Drop Multiplexers
ATM Switches
Digital Cross-Connects
MAX3675EHJ
-40°C to +85°C 5mm 32 TQFP
MAX3675E/D
-40°C to +85°C Dice*
*Contact factory for availability. Dice are designed to operate
from -40°C to +85°C, but are tested and guaranteed only at
Tj = +45°C.
Pin Configuration appears at end of data sheet.
___________________________________________________ Typical Operating Circuit
100pF
PHOTO-
DIODE
+3.3V
+3.3V
C_LOL
0.01µF
52.3Ω
1% ^2.2µF
0.01µF
V_CC
FILT
MAX3664
INREF
OUT+
IN
OUT-
Z_O = 50Ω
100Ω
Z_O = 50Ω
GND COMP
220pF
+3.3V
0.1µF
INSEL LOL PHADJ+ PHADJ- FIL+
DDI+
DDI-
C_IN
0.01µF
ADI+
MAX3675
FIL-
SDO+
SDO-
ADI-
C_IN
0.01µF
V_CC
SCLKO+
SCLKO-
CFILT OLC+ OLC- GND RSSI INV
VTH LOP
C_F
47nF
C_OLC
33nF
R2
R1
100k
+3.3V
130Ω
Z_O = 50Ω
Z_O = 50Ω
82Ω
130Ω
82Ω
+3.3V
130Ω
Z_O = 50Ω
Z_O = 50Ω
82Ω
130Ω
82Ω
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