Fairchild ON Semiconductor FSA642 User manual

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© 2009 Fairchild Semiconductor Corporation 1 FSA642 FEB • Rev. 0.0.1
FSA642 — Evaluation Board User Guide
1. Introduction
This user guide is for the FSA642 evaluation board and is intended to complement the FSA642
datasheet. Technical or application-specific questions not addressed in this guide should be
directed to Fairchild’s technical support team. Please contact your Fairchild representative, visit
our website at www.fairchildsemi.com, or contact us at [e-mail].
This evaluation board is used to evaluate the high-speed performance of Fairchild’s differential
3PDT MIPI switch. SMA connectors are used for maintaining signal integrity of input and output
signals. The board is designed to pass differential clock or data signals without the use of on-
board loads or terminations. Clock and data trace pairs are designed for 100Ωdifferential
impedance. For lab evaluation, a standard 50Ωpulse/data generator can supply signals into the
inputs and 50Ωterminated, high-bandwidth oscilloscope sampling heads can be used to
terminate the outputs.
Figure 1. Evaluation Board with Component Locations Labeled
Configuration of the device is simplified by on-board switches to enable/disable the device and
to control the output select manually. Signal trace layout follows the UMLP package pad layout,
with clock/data inputs at the left and multiplexed outputs at top, right and bottom.
CLK
D1
D2
CLKB
CLKA
D1A
D2A
D1B
D2B
Control Switches
(SW1, SW2)
Power Supply
Connectors

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© 2009 Fairchild Semiconductor Corporation 2 FSA642 FEB • Rev. 0.0.1
2. Getting Started
To begin using this evaluation board, perform the following steps:
1. Configure the on-board control pin switches in the desired state (see Table 1).
2. Connect signal cables or 50-Ωterminated scope cables to SMA connectors.
3. Apply power to the board at the power supply connectors.
Note: Per the datasheet, the recommended VCC operation range is 2.65V to 4.3V.
4. Enable input signals.
3. Control Pin Configuration
This FSA642 evaluation board has two mechanical SPDT switches located at the bottom left
corner. These configure the output enable (/OE) and output switch selection (SEL) functions of
the FSA642. Table 1 lists the position of the mechanical switches and the corresponding
functional states for the control inputs.
Table 1. Control Pin Configurations
SW1
(/OE) SW2 (SEL) FSA642 Switch Function
n/a Inputs disconnected from outputs
CLK, D1, D2 differential pairs connected to CLKA, D1A, D2A
CLK, D1, D2 differential pairs connected to CLKB, D1B, D2B

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© 2009 Fairchild Semiconductor Corporation 3 FSA642 FEB • Rev. 0.0.1
Figure 1. Application Board Schematic

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© 2009 Fairchild Semiconductor Corporation 4 FSA642 FEB • Rev. 0.0.1
WARNING AND DISCLAIMER
Replace components on the Evaluation Board only with those parts shown on the parts list (or Bill of Materials) in the Users’ Guide. Contact an authorized Fairchild
representative with any questions.
The Evaluation board (or kit) is for demonstration purposes only and neither the Board nor this User’s Guide constitute a sales contract or create any kind of
warranty, whether express or implied, as to the applications or products involved. Fairchild warrantees that its products meet Fairchild’s published specifications, but
does not guarantee that its products work in any specific application. Fairchild reserves the right to make changes without notice to any products described herein to
improve reliability, function, or design. Either the applicable sales contract signed by Fairchild and Buyer or, if no contract exists, Fairchild’s standard Terms and
Conditions on the back of Fairchild invoices, govern the terms of sale of the products described herein.
DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE
RELIABILITY, FUNCTION, OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT
OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.
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As used herein:
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intended for surgical implant into the body, or (b) support or sustain life, or
(c) whose failure to perform when properly used in accordance with
instructions for use provided in the labeling, can be reasonably expected to
result in significant injury to the user.
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whose failure to perform can be reasonably expected to cause the failure of
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Counterfeiting of semiconductor parts is a growing problem in the industry. All manufacturers of semiconductor products are experiencing counterfeiting of their
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Revision History
Date Reason for Change Revision #
04/02/10 Initial Draft (S.Barden) A0.0

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1
ON Semiconductor and are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries.
ON Semiconductor owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of ON Semiconductor’s product/patent
coverage may be accessed at www.onsemi.com/site/pdf/Patent−Marking.pdf. ON Semiconductor reserves the right to make changes without further notice to any products herein.
ON Semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does ON Semiconductor assume any liability
arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.
Buyer is responsible for its products and applications using ON Semiconductor products, including compliance with all laws, regulations and safety requirements or standards,
regardless of any support or applications information provided by ON Semiconductor. “Typical” parameters which may be provided in ON Semiconductor data sheets and/or
specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer
application by customer’s technical experts. ON Semiconductor does not convey any license under its patent rights nor the rights of others. ON Semiconductor products are not
designed, intended, or authorized for use as a critical component in life support systems or any FDA Class 3 medical devices or medical devices with a same or similar classification
in a foreign jurisdiction or any devices intended for implantation in the human body. Should Buyer purchase or use ON Semiconductor products for any such unintended or unauthorized
application, Buyer shall indemnify and hold ON Semiconductor and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and
expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such
claim alleges that ON Semiconductor was negligent regarding the design or manufacture of the part. ON Semiconductor is an Equal Opportunity/Affirmative Action Employer. This
literature is subject to all applicable copyright laws and is not for resale in any manner.
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