felto Posted January 22, 2005 Report Share Posted January 22, 2005 Does anyone know what this chip is?I am trying to find the schematics of it butcannot find anything on it.It looks like a 555 timer with 8 pins to it.But it doesnt say anything like that.Does anyone know a website or a databook that they may have and can look up the schematicsfor me. Here is the number TA75393APRemember it looks exactly like the 555 timerwith 8 pins to it.Thanks for your help Quote Link to comment Share on other sites More sharing options...
MP Posted January 22, 2005 Report Share Posted January 22, 2005 Dual Bipolar Comparator. Cross reference says it is close or the same as:TA75393 - NJM2903 LM293LM393 LM293LM393 LM293/ALM393/A LM293/ALM393/A LM393 LM293/ALM393/A MB47393 BA10393 LA6393 KIA393 - LM393 The most common equivalent is the LM393. Here is the pin out.MP Quote Link to comment Share on other sites More sharing options...
felto Posted January 23, 2005 Author Report Share Posted January 23, 2005 Thanks MP for that info.Where did you find that infoI went to embeddedlinks.com (chipdir)and couldnt find anything there.Is there another website that you knowabout?Thanks again Quote Link to comment Share on other sites More sharing options...
audioguru Posted January 23, 2005 Report Share Posted January 23, 2005 Hi Felto,There are lots of links on Google. Most of them list the TA75393 with the LM393 in their title. Quote Link to comment Share on other sites More sharing options...
hotwaterwizard Posted January 23, 2005 Report Share Posted January 23, 2005 Here is the Datasheet.TA75393.pdf Quote Link to comment Share on other sites More sharing options...
audioguru Posted January 23, 2005 Report Share Posted January 23, 2005 Thanks John,I should have looked at the details, they are not the same.Toshiba added an extra output transistor to their TA75393 copy of National's LM393, resulting in a guaranteed output sink current minimum of 65mA, compared to the LM393's minimum of only 6mA.Therefore the TA75393 has a supply current maximum of 8mA, compared to the LM393's maximum of only 1.0mA.A circuit requiring the high drive current from a TA75393 certainly won't work with an LM393 unless you add your own output transistor (and base current feed for it) and switch the input polarities around. ;D Quote Link to comment Share on other sites More sharing options...
felto Posted January 23, 2005 Author Report Share Posted January 23, 2005 So if I wanted to order the TA75393AP chipwhere would I get it? Quote Link to comment Share on other sites More sharing options...
audioguru Posted January 23, 2005 Report Share Posted January 23, 2005 Toshiba probably has a website. Have you looked for it? Quote Link to comment Share on other sites More sharing options...
MP Posted January 23, 2005 Report Share Posted January 23, 2005 felto and others:Here are some links from a site that primarily is geared toward arcade devices. They have some pretty good general info, though....Component Marking Codes:http://www.ionpool.net/arcade/tech/component_markings/component_codes.htmlLots of IC data includes pin outs and logic tables (forgive the name of the page):http://www.ionpool.net/arcade/giicm/GIICM.htmlA pretty good cross ref, but short: http://www.ionpool.net/arcade/tech/Linear_Cross_Reference.htmlMemory Cross reference: http://www.ionpool.net/arcade/tech/memory_cross.htmlRCA transistor Cross reference:http://www.ionpool.net/arcade/tech/rca_transistors/rca-diode-transistor.htmlSemiconductor cross reference: http://www.ionpool.net/arcade/tech/semi_cross.htmlStatic Ram cross: http://www.ionpool.net/arcade/tech/staticram.htmlTransistor database. More of a description. Not really a cross:http://www.ionpool.net/arcade/tech/transistor_database.txtMotorola Uniwatt transistor cross:http://www.ionpool.net/arcade/tech/uniwatt.htmlPerhaps we can add these to our links on the site.MP Quote Link to comment Share on other sites More sharing options...
mixos Posted January 23, 2005 Report Share Posted January 23, 2005 Nice links MP :)Added here: http://www.electronics-lab.com/links/?c=136in parent category and subcategories. Quote Link to comment Share on other sites More sharing options...
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