Custom Silicon Solutions, Inc. Newsletter
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July/August 2012
In This Issue
CSS555 Timer Calculator 


Since we have just introduced a new programmer for the CSS555/CSS555C Timer IC's, now might be a good time to review how to determine the timing components - very easily - using Excel based Timing Calculators.   


I'm sure most of you know how to do this, but these Timing Calculators make it easier and quickly provide all the information you need.


The Calculators include the "CSS555 Timer Delay Calculator" and the "CSS555 Adjustable Duty Cycle Calculator" for both the CSS555 and CSS555C ICs.  They are all available for download from our website on the Standard Product page.  

EXample of Calculator Display

The figure above is an example of an input/output page for these calculators.  The I/O format makes it very easy to configure and establish component values for the CSS555 Timers. 


I would like to encourage you to download a Calculator and try it out.  Please let us know what you think.


Note that the CSS555 Timers, the CSS55 Demo Kits and CSS555 EZ Programmer are available through our distributor JameCo Electronics. 


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 Memberships & Certifications

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Global Semiconductor Alliance

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CSS Certifications:


ISO 9001:2008 Certified

ISO 9001 


ITAR Compliant: Registration Code M24941

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Central Contractor Registered (CCR): CAGE Code 5F3G6


Qmed Qualified Supplier 

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Welcome to the July/August edition of the CSS Newsletter.  We hope you find these articles informative and helpful in your work.

Custom Silicon Solutions (CSS) provides a true Turn-Key Solution to meet your Mixed Signal ASIC needs - from Development through Production.  Our mission is to develop an ASIC that meets your requirement at the lowest possible price and with a minimum of assistance from your technical staff.  Please visit us at for more information or send an inquiry to  [email protected].

Keith Shelton

ON Semi Foundry Services   

Promotes CSS NV Register 

CSS NV Register Block Diagram 

ON Semiconductor Foundry Services is now promoting the CSS NV Register for use in their C5 Foundry processes while CSS still provides and supports this IP. The CSS NV Register is a latch based non-volatile memory circuit that is ideal for use in trimming analog circuits. The NV Register is compatible for most of the C5 processes at ON as it only requires the standard processing layers (including Poly 2).  


The great thing about the NV Register is that once programmed it will automatically come up in the programmed state when power is applied - nothing else is required. Also, since it is latched based, it draws no current in normal operation. The NV Register can easily be configured to the number of bits needed for your trimming application (7 bits will provide a setting to 1% accuracy and 10 bits will provide 0.1% setting accuracy).


At CSS we use the NV Register in most of our custom ASIC designs. The most typical applications include trimming analog circuits for higher accuracy and reconfiguring the ASIC for a variety of applications.  Other common applications include the storage of the part number, a serial number or a date code.  The applications seem to be endless.  We have found the NV Register is an essential capability in our design work.  


The NV Register is a self contained programmable non-volatile memory. It includes a built-in programming voltage generator so no additional voltages are required. It also programs with a single store operation and includes numerous serial and parallel interface options for entering data and reading out contents of the NV Register.  


Specifications for the NV Register may be downloaded from the Custom Silicon Solutions website (CSS Classic NV Register Spec.pdf). Also, if you have questions, please feel free to call (949-797-9220) or email Mike McDaid at [email protected]




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Custom Silicon Solutions, Inc.

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