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NB4N840M_07 Datasheet(PDF) 1 Page - ON Semiconductor

Part No. NB4N840M_07
Description  3.3V 3.2Gb/s Dual Differential Clock/Data 2 x 2 Crosspoint Switch with CML Output and Internal Termination
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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© Semiconductor Components Industries, LLC, 2007
March, 2007 − Rev. 3
1
Publication Order Number:
NB4N840M/D
NB4N840M
3.3V 3.2Gb/s Dual
Differential Clock/Data 2 x 2
Crosspoint Switch with
CML Output and Internal
Termination
Description
The NB4N840M is a high−bandwidth fully differential dual
2 x 2 crosspoint switch with CML inputs/outputs that is suitable for
applications such as SDH/SONET, DWDM, Gigabit Ethernet and
high speed switching. Fully differential design techniques are used to
minimize jitter accumulation, crosstalk, and signal skew, which make
this device ideal for loop−through and protection channel switching
applications.
Internally terminated differential CML inputs accept AC−coupled
LVPECL (Positive ECL) or direct coupled CML signals. By providing
internal 50
W input and output termination resistor, the need for
external components is eliminated and interface reflections are
minimized. Differential 16 mA CML outputs provide matching
internal 50
W terminations, and 400 mV output swings when
externally terminated, 50
W to VCC.
Single−ended LVCMOS/LVTTL SEL inputs control the routing of
the signals through the crosspoint switch which makes this device
configurable as 1:2 fan−out, repeater or 2 x 2 crosspoint switch. The
device is housed in a low profile 5 x 5 mm 32−pin QFN package.
Features
Plug−in compatible to the MAX3840 and SY55859L
Maximum Input Clock Frequency 2.7 GHz
Maximum Input Data Frequency 3.2 Gb/s
225 ps Typical Propagation Delay
80 ps Typical Rise and Fall Times
7 ps Channel to Channel Skew
430 mW Power Consumption
< 0.5 ps RMS Jitter
7 ps Peak−to−Peak Data Dependent Jitter
Power Saving Feature with Disabled Outputs
Operating Range: VCC = 3.0 V to 3.6 V with VEE = 0 V
CML Output Level (400 mV Peak−to−Peak Output), Differential
Output
These are Pb−Free Devices
QFN32
MN SUFFIX
CASE 488AM
See detailed ordering and shipping information on page 8 of
this data sheet.
ORDERING INFORMATION
MARKING
DIAGRAM
http://onsemi.com
32
1
NB4N
840M
ALYWG
1
A
= Assembly Location
WL
= Wafer Lot
YY
= Year
WW
= Work Week
G
= Pb−Free Package
CML
CML
CML
CML
CML
CML
CML
CML
0
1
0
1
0
1
0
1
Figure 1. Functional Block Diagram
QA0
QA0
ENA0
SELA0
QA1
QA1
ENA1
SELA1
QB0
QB0
ENB0
SELB0
QB1
QB1
ENB1
SELB1
DA0
DA0
DA1
DA1
DB0
DB0
DB1
DB1




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