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NB4N840MMNEVB
Evaluation Board User's
Manual for NB4N840M
Description
The NB4N840M Evaluation Board was designed to
provide a flexible and convenient platform to quickly
evaluate, characterize and verify the performance and
operation of the NB4N840M dual 2 x 2 Crosspoint Switch.
This user's manual provides detailed information on the
board's contents, layout and use. The manual should be used
in conjunction with the NB4N840M data sheet which
contains full technical details on device specifications and
operation.
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
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
© Semiconductor Components Industries, LLC, 2012
February, 2012 − Rev. 2
channel
switching
Figure 1. NB4N840M Evaluation Board
1
http://onsemi.com
EVAL BOARD USER'S MANUAL
applications. Each 2 x 2 crosspoint switch can fan−out
and/or multiplex up to 3.2 Gb/s data and 2.7 GHz clock
signals.
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 V
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.
.
CC
Publication Order Number:
EVBUM2078/D

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Summary of Contents for ON Semiconductor NB4N840MMNEVB

  • Page 1 NB4N840MMNEVB Evaluation Board User's Manual for NB4N840M http://onsemi.com EVAL BOARD USER’S MANUAL Description The NB4N840M Evaluation Board was designed to applications. Each 2 x 2 crosspoint switch can fan−out provide a flexible and convenient platform to quickly and/or multiplex up to 3.2 Gb/s data and 2.7 GHz clock evaluate, characterize and verify the performance and signals.
  • Page 2: Output Signals

    NB4N840MMNEVB Board Features Power Supply • Fully assembled evaluation board • Accommodates the electrical characterization of the +3.3 V NB4N840M in the QFN32 package − • Equal length input and output data lines to minimize skew • Selectable jumpers •...
  • Page 3 NB4N840MMNEVB (J13) DA0 (J12) (J14) DA0 (J11) ENA0 (JP7) SELA0 (JP6) (J10) (J15) DA1 (J9) (J16) DA1 ENA1 (JP8) SELA1 (JP5) (J3) DB0 (J6) (J4) DB0 (J5) ENB0 (JP3) SELB0 (JP2) (J8) (J1) DB1 (J7) (J2) DB1 ENB1 (JP4) SELB1 (JP1) Figure 3.
  • Page 4 NB4N840MMNEVB 4.7 mH 33 mF 2.2 mF 0.1 mF 0.1 mF 0.1 mF 0.1 mF 0.1 mF 0.1 mF 0.1 mF 0.1 mF 0.1 mF 1 kW 1 kW 1 kW 1 kW 0.1 mF 0.1 mF 0.1 mF ENB1 0.1 mF...
  • Page 5 NB4N840MMNEVB Table 5. BILL OF MATERIALS Manufacturer Part No. (Notes 1, 2) Ref. Number Description Manufacturer R1 – R8 Multicomp MC0402WGF1001TCE−TR 1 kW ±1%, 0402, Resistors R9 – R12 100 W ±1%, 0402, Resistors Multicomp MC0402WGF1000TCE−TR 33 mF ±10%, size “D”, Tantalum Capacitor...
  • Page 6 NB4N840MMNEVB Figure 6. NB4N840MMN Evaluation Board Top (Component) Layer Figure 7. Ground Layer http://onsemi.com...
  • Page 7 NB4N840MMNEVB Figure 8. Power Layer Figure 9. Bottom Layer http://onsemi.com...
  • Page 8 onsemi, , and other names, marks, and brands are registered and/or common law trademarks of Semiconductor Components Industries, LLC dba “onsemi” or its affiliates and/or subsidiaries in the United States and/or other countries. onsemi owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of onsemi’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent−Marking.pdf.
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