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PDF MAX3840 Data sheet ( Hoja de datos )
| Número de pieza | MAX3840 | |
| Descripción | +3.3V / 2.7Gbps Dual 2 . 2 Crosspoint Switch | |
| Fabricantes | Maxim Integrated | |
| Logotipo |  |
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19-1854; Rev 1; 11/01
+3.3V, 2.7Gbps Dual 2 ✕ 2 Crosspoint Switch
General Description
The MAX3840 is a dual 2 ✕ 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. 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 ✕ 2 crosspoint switch can fan out
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 ✕ 5mm footprint) and operates
from a +3.3V supply over a temperature range of -40°C
to +85°C.
________________________Applications
SDH/SONET and DWDM Transport Systems
Add-Drop Multiplexers
ATM Switch Cores
WDM Cross-Connects
High-Speed Backplanes
Features
o Single +3.3V Supply
o 460mW Power Consumption
o 2psRMS Random Jitter
o 7psP-P Deterministic Jitter
o Power-Down Feature for Deselected Outputs
o CML Inputs/Outputs
o 6ps Channel-to-Channel Skew
o 100ps Output Edge Speed
o 5mm ✕ 5mm 32 QFN Package
PART
MAX3840EGJ
Ordering Information
TEMP RANGE PIN-PACKAGE
-40°C TO +85°C 32 QFN
Pin Configuration appears at end of data sheet.
Typical Application Circuit
MAX3866
TIA AND LA
MAX3876
CDR
MAX3866
TIA AND LA
MAX3876
CDR
ZO = 50Ω TRANSMISSION LINE
DATA
VCC = +3.3V
CLOCK
DATA
CLOCK
MAX3840
CROSSPOINT
SWITCH
MAX3869
LASER
DRIVER
MAX3869
LASER
DRIVER
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1 page  
+3.3V, 2.7Gbps Dual 2 ✕ 2 Crosspoint Switch
PIN
1
2
3
4
5
6
7
8
9, 24
10, 13, 16, 17,
20, 23
11
12
14
15
18
19
21
22
25
26
27
28
29
30
31
32
EP
NAME
ENB1
DIB1+
DIB1-
ENB0
SELB0
DIB0+
DIB0-
SELB1
GND
VCC
DOB0-
DOB0+
DOB1-
DOB1+
DOA1-
DOA1+
DOA0-
DOA0+
SELA1
DIA0+
DIA0-
SELA0
ENA0
DIA1+
DIA1-
ENA1
Exposed Pad
Pin Description
FUNCTION
Channel B1 Output Enable, TTL Input. A TTL low input powers down B1 output stage.
Channel B1 Positive Signal Input, CML
Channel B1 Negative Signal Input, CML
Channel B0 Output Enable, TTL Input. A TTL low input powers down B0 output stage.
Channel B0 Output Select, TTL Input. See Table 1.
Channel B0 Positive Signal Input, CML
Channel B0 Negative Signal Input, CML
Channel B1 Output Select, TTL Input. See Table 1.
Supply Ground
Positive Supply
Channel B0 Negative Output, CML
Channel B0 Positive Output, CML
Channel B1 Negative Output, CML
Channel B1 Positive Output, CML
Channel A1 Negative Output, CML
Channel A1 Positive Output, CML
Channel A0 Negative Output, CML
Channel A0 Positive Output, CML
Channel A1 Output Select, TTL Input. See Table 1.
Channel A0 Positive Signal Input, CML
Channel A0 Negative Signal Input, CML
Channel A0 Output Select, TTL Input. See Table 1.
Channel A0 Output Enable, TTL Input. A TTL low input powers down A0 output stage.
Channel A1 Positive Signal Input, CML
Channel A1 Negative Signal Input, CML
Channel A1 Output Enable, TTL Input. A TTL low input powers down A1 output stage.
Ground. The exposed pad must be soldered to the circuit board ground for proper
electrical and thermal operation.
_______________________________________________________________________________________ 5
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet MAX3840.PDF ] | |
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