Microchip SY89645L Handleiding


Lees hieronder de đź“– handleiding in het Nederlandse voor Microchip SY89645L (8 pagina's) in de categorie Niet gecategoriseerd. Deze handleiding was nuttig voor 17 personen en werd door 2 gebruikers gemiddeld met 4.5 sterren beoordeeld

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Precision Low Skew, 1-to-4 LVCMOS/LVTTL-
to-LVDS Fanout Buffer
SY89645L Evaluation Board
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
September 2006
M9999-091906-A
hbwhelp@micrel.com or (408) 955-1690
General Description
The SY89645L evaluation board is designed for
convenient setup and quick evaluation of the SY89645L
fanout buffer. The board is optimized to interface directly
to a 50Ω oscilloscope.
For quick and convenient evaluation of this part, the
board is AC-coupled. For applications that require a DC-
coupled configuration, step-by-step instructions for
modifying the board are included.
Features
• +3.3V power supply for the SY89645L
• AC-coupled configuration
• I/O interface includes on-board termination
• Fully assembled and tested
• Can be reconfigured for DC-coupled operation
Related Documentation
• SY89645L Precision Low Skew, 1-to-4
LVCMOS/LVTTL-to-LVDS Fanout Buffer Datasheet
_________________________________________________________________________________________________________
Evaluation Board
Micrel, Inc. SY89645L Evaluation Board
September 2006
2 M9999-091906-A
hbwhelp@micrel.com or (408) 955-1690
Evaluation Board Description
The default configuration for the SY89645L board is AC-
coupled. The choice between AC- and DC-coupled
configurations offers the user flexibility for specific
applications.
AC-Coupled Evaluation Board
The SY89645L default configuration is set up for AC-
coupled operation. In the AC-coupled configuration, the
output voltage offset is automatically adjusted to
interface directly with a 50Ω (to GND) scope.
For quick evaluation of the SY89645L, connect V
CC
to
3.3V and V
EE
and GND to 0V.
DC-Coupled Evaluation Board
The SY89645L evaluation board can be reconfigured for
DC-coupled operation. This can be accomplished by
modifying the board to use two power supplies into a
“split-supply configuration.” In order to correctly interface
LVDS to a 50Ω (to ground) scope, V
CC
must be V
OCM
above the GND level. Therefore, a 3.3V supply will be
split into +1.2V and -2.1V to ensure proper V
CC
to V
EE
voltage difference.
Output Disable
The SY89645L provides a disable output function.
When CLK_EN is pulled HIGH, the output buffer is
disabled. Output Q switches to a LOW state and /Q
output switches to a HIGH state.
Micrel, Inc. SY89645L Evaluation Board
September 2006
3 M9999-091906-A
hbwhelp@micrel.com or (408) 955-1690
Evaluation Board
Note: R1 and R2 terminate trace at SMA pad.
SY89645L AC-Coupled Evaluation Board
I/O Power Supply V
CC
GND V
EE
DC-Coupled Input/AC-Coupled Output 3.3V 3.3V 0V 0V
Table 1. Quick Start SY89645L AC-Coupled Evaluation Board Power Supply Connections.


Product specificaties

Merk: Microchip
Categorie: Niet gecategoriseerd
Model: SY89645L

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