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MAX3270 Datasheet(Fiches technique) 1 Page - Maxim Integrated Products

Numéro de pièce MAX3270
Description  155Mbps/622Mbps Clock Recovery and Data Retiming IC with Fully Integrated Phase/Frequency Detector
Télécharger  12 Pages
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Fabricant  MAXIM [Maxim Integrated Products]
Site Internet  http://www.maxim-ic.com
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_______________General Description
The MAX3270 is a complete Clock Recovery and Data
Retiming IC for 155Mbps and 622Mbps SDH/SONET
and ATM applications. The MAX3270 meets Bellcore
and CCITT jitter tolerance specifications ensuring error-
free data recovery. Recovered clock and data are
phase aligned using a fully integrated phase-locked
loop (PLL). An output frequency monitor (FM) is includ-
ed to detect loss of PLL acquisition or a loss of input
data.
The MAX3270 has differential ECL input and output
interfaces, so it is less susceptible to noise in a high-
frequency environment. The fully integrated PLL
includes an integrated phase-frequency detector that
eliminates the need for external references.
________________________Applications
155Mbps (STM-1/OC-3)/622Mbps (STM-4/
OC-12) SDH/SONET Transmission Systems
155Mbps/622Mbps ATM/SONET Access Nodes
Add/Drop Multiplexers
Cross-Connects
____________________________Features
o Supports Both 155Mbps and 622Mbps Clock
Recovery and Data Retiming
o Fully Integrated Phase/Frequency Detector
o Capable of Switching to an External Clock
o Differential 100K ECL Data and Clock I/Os
o Output Monitor Provides Lock Detection
o No External Reference Clock Required
Pin Configuration appears at end of data sheet.
155Mbps/622Mbps Clock Recovery and
Data Retiming IC with Fully Integrated
Phase/Frequency Detector
________________________________________________________________
Maxim Integrated Products
1
MAX3270
50
50
50
50
50
450
11
+5V
3
4
41
42
13
18
20
14
17
2
19
38
39
SDIP
RCON
CRP
FILP
FILG
FILN
FM
RCOP
RDOP
RDON
26
25
31
30
2.2
µF
20
-4.5V
2.2
µF
20
28
9
8
10
6
SDIN
PHADJ
-2V
-2V
-2V
EXCS AND CRS ARE CONNECTED FOR
622Mbps OPERATION.
BYPASS SUPPLIES WITH 0.1
µF AND 0.01µF CAPACITORS.
DECOUPLE AVEE1, AVEE2, AND GVEE SUPPLY PINS.
50
50
16
15
5
7
27
29
32
-2V
+5V
24
VR
EXCS
CRS
RST
EXC
12
-4.5V
-4.5V
-4.5V
-4.5V
DIGITAL
SUPPLY
ANALOG SUPPLY
1
35
36 22 21 34
___________________________________________________Typical Operating Circuit
Call toll free 1-800-998-8800 for free samples or literature.
19-0379; Rev 0; 3/95
PART
MAX3270EMH
-40°C to +85°C
TEMP. RANGE
PIN-PACKAGE
44 MQFP
______________Ordering Information




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