MAX3840 Maxim, MAX3840 Datasheet

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MAX3840

Manufacturer Part Number
MAX3840
Description
The MAX3840 is a dual 2 x 2 asynchronous crosspoint switch for SDH/SONET DWDM and other high-speed data switching applications where serial data stream loop-through and protection channel switching are required
Manufacturer
Maxim
Datasheet

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The MAX3840 is a dual 2
switch for SDH/SONET DWDM and other high-speed
data switching applications where serial data stream
loop-through and protection channel switching are
required. It is ideal for OC-48 systems with forward
error correction. A high-bandwidth, fully differential sig-
nal path minimizes jitter accumulation, crosstalk, and
signal skew. Each 2
and/or multiplex up to 2.7Gbps data and 2.7GHz clock
signals. All inputs and outputs are current mode logic
(CML) compatible and easily adaptable to interface
with an AC-coupled LVPECL signal. When not used,
each CML output stage can be powered down with an
enable control to conserve power. The typical power
consumption is 460mW with all outputs enabled.
The MAX3840 is compatible with the MAX3876
2.5Gbps clock and data recovery (CDR) circuit.
The MAX3840 is available in a 32-pin exposed-pad
QFN package (5mm
from a +3.3V supply over a temperature range of -40°C
to +85°C.
19-1854; Rev 5; 9/07
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
________________________Applications
SDH/SONET and DWDM Transport Systems
Add-Drop Multiplexers
ATM Switch Cores
WDM Cross-Connects
High-Speed Backplanes
+3.3V, 2.7Gbps Dual 2 2 Crosspoint Switch
________________________________________________________________ Maxim Integrated Products
TIA AND LA
TIA AND LA
Z
MAX3866
MAX3866
O
= 50Ω TRANSMISSION LINE
General Description
2 crosspoint switch can fan out
5mm footprint) and operates
2 asynchronous crosspoint
MAX3876
MAX3876
CDR
CDR
CLOCK
CLOCK
DATA
DATA
CROSSPOINT
MAX3840
SWITCH
+Denotes a lead-free package.
Pin Configurations appear at end of data sheet.
MAX3840ETJ+
MAX3840EGJ
Single +3.3V Supply
460mW Power Consumption
2ps
7ps
Power-Down Feature for Deselected Outputs
CML Inputs/Outputs
6ps Channel-to-Channel Skew
100ps Output Edge Speed
5mm
V
CC
PART
RMS
P-P
= +3.3V
Deterministic Jitter
5mm 32 QFN or Thin QFN Package
Random Jitter
Typical Application Circuit
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
Ordering Information
MAX3869
MAX3869
DRIVER
DRIVER
LASER
LASER
PIN -
PA C K A G E
32 TQFN
32 QFN
Features
PK G
C O D E
T3255-3
G3255-1
1

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MAX3840 Summary of contents

Page 1

... The typical power consumption is 460mW with all outputs enabled. The MAX3840 is compatible with the MAX3876 2.5Gbps clock and data recovery (CDR) circuit. The MAX3840 is available in a 32-pin exposed-pad QFN package (5mm 5mm footprint) and operates from a +3.3V supply over a temperature range of -40°C to +85° ...

Page 2

... Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability ...

Page 3

Dual 2 2 Crosspoint Switch AC ELECTRICAL CHARACTERISTICS (V = +3.0V to +3.6V -40°C to +85°C. Typical values are PARAMETER SYMBOL CML Input and Output Data Rate CML Input and Output Clock ...

Page 4

Dual 2 2 Crosspoint Switch (V = +3.3V +25°C, unless otherwise noted SUPPLY CURRENT vs. TEMPERATURE 160 4 OUTPUTS ENABLED 140 3 OUTPUTS ENABLED 120 2 OUTPUTS ENABLED 100 1 OUTPUT ENABLED 80 0 ...

Page 5

Dual 2 2 Crosspoint Switch PIN NAME 1 ENB1 2 DIB1+ 3 DIB1- 4 ENB0 5 SELB0 6 DIB0+ 7 DIB0- 8 SELB1 9, 24 GND 10, 13, 16 DOB0- 12 DOB0+ ...

Page 6

... DIB1- Figure 1. Functional Block Diagram _______________ Detailed Description The block diagram in Figure 1 shows the MAX3840 architecture. The SELA_ and SELB_ pins control the rout- ing of the signals through the crosspoint switch. Each output of the crosspoint switch drives a CML output dri- ver. Each of the outputs, DOA_ and DOB_, is enabled or disabled by the respective ENA_ and ENB_ pins ...

Page 7

... V nections short. Use multiple vias where possible. Also, use controlled-impedance transmission lines to inter- face with the MAX3840 data inputs and outputs. ___________________ Interface Models Figure 3 shows the interface model for the CML inputs, and Figure 4 shows the model for CML outputs. ...

Page 8

... PACKAGE TYPE 32 QFN 32 TQFN (max) to 2.0V (max). P-P P registered trademark of Maxim Integrated Products, Inc. Pin Configurations DOB1+ 14 DOB1 MAX3840 12 DOB0+ 11 DOB0 GND THIN QFN Package Information DOCUMENT NO. 21-0091 21-0140 Revision History ...

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