74S Datasheet, 74S PDF, 74S Data sheet, 74S manual, 74S pdf, 74S, datenblatt, Electronics 74S, alldatasheet, free, datasheet. CONNECTION DIAGRAM. PINOUT A. /74S V54LS/74LS BIT RANDOM ACCESS MEMORY. (With 3-State Outputs). 16Vcc a. 74S Datasheet, 74S PDF, Bit Bipolar Scratch Pad Memory.

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Using open collector as regular 5v output Ask Question. Unless you’re doing level shifting, OC outputs aren’t used to drive other logic inputs.

Post a schematic of what you currently have. There is a C-E voltage drop as well. Email Required, but never shown.

Datasheet Page , pdf datasheet & application note

Sign up or log in Sign up using Google. What would be the correct way to set it up? Typical open collector led setup would be: U2-U5, are they buffers?

If you measure the output pin voltage compared to ground, when the output pin should be Low open-collector activewhat do you get? What voltage level activates the buffers?

That means the output IS pulling the line low at 15mA through the resistor to boot. Sign up using Email and Password. Another consideration is the max current of the 74HC04 chip which is 50mA total and datashheet the LED resistors missing this can be a big problem. Sign up using Facebook.


74S189 Datasheet دیتاشیت PDF دانلود

I’m trying to use the following IC: Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of service 74s19, privacy policy and cookie policyand that your continued use of the website is subject to these policies. The resistors that are in the input of the 74H04 will not play any part in limiting the LED current.

Post as a guest Name. Home Questions Tags Users Unanswered. Did you write to the data register?

74S182N, 74S189, 74S191

And what part number? So, using this setup if I would like to drive another IC how would I connect it, I really have a hard time undertanding this Ok, but I don’t have much of choice because thats the only RAM that I have, I know that the 74S is not open collector, but I don’t have access to it at the moment.

The datasheets list that max would be 0. Thanks for the comment anyways. Also, the output is inverted because according to the datasheet the output is 74s89 data’s complement. Open collectors outputs are usually used as low side switches by connecting the emitter to the ground and then feed the ground side of load from the collector.


By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. You are essentially creating two paths two ground, which are both variable and not perfect. What the open collector can do when used that way is to either sink current provide ground to the load when ON or leave the output floating high resistance across the transistor when off, the pullup resistor can force a HIGH state while in that high resistance mode.

By clicking “Post Your Answer”, you dxtasheet that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies. Tristian 1 9.