74HC/HCT Octal D-type transparent latch;. 3-state. For a complete data sheet, please also download: • The IC06 74HC/HCT/HCU/HCMOS. The 74HC; 74HCT is a high-speed Si-gate CMOS device and is pin The 74HC; 74HCT has octal D-type transparent latches featuring separate. 74HCTN 74HC/HCT; Octal D-type Transparent Latch; 3-state;; Package: SOT (DIP20), Details, datasheet, quote on part number: 74HCTN.

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My solution is to use P channel mosfets to switch the power. By using our site, you acknowledge that you have read and understand our 774hct573n PolicyPrivacy Policyand our Terms of Service. However, driving a LED at 20 mA is often unnecessary today.

Sign up or log in Sign up using Google. As is stated in the below table the output max current is 35mA for each output, being the nominal current 20mA, enough to control a LED in every output.

This website has a built-in schematic editor. It would have been so simple to datasheef a current drain driver but sadly it’s not an option.


My belief is that turning on all 8 outputs at 20 ma exceeds the IC max current. Nik Middleton 6 5.

Get on to your supplier and ask them to justify their thoughts. Maybe you will be OK afterall, or maybe ratasheet simple part change can fix everything up. The IC has a global limit of 70 mA. By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued dztasheet of the website is subject to these policies.

74HC573; 74HCT573 Octal D-type Transparent Latch; 3-state

I should have added that there are 2 LEDS being driven datasheer each output. Sign up using Email and Password. Glad to know i’m not going nuts. It’s not always LED’s but they are non fatasheet. Post as a guest Name. The load is between the IC and ground source current? My understanding is that is has a dqtasheet of 35 mA per pin, but a total of 70 mA for the IC. I have no control over end devices. And that supply current is also the main part of the current that feeds outputs.

Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to 47hct573n policies. Hi, basic schematic added. I’ve been reading a lot of data sheets of late looking for chips that will work for a small project. Q are 8 outputs and attach to equipment that requires 20 ma. I’m loosing some voltage 4.


Data sheet is here: You should make sure that the design actually tries to do that.

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Would really appreciate some input. You are not wrong. Datasehet hoping someone can help a noob out here. A simple indicator LED will be fine at 5 mA. You can edit your question and then click on the icon that looks like a schematic symbol, and it will load the schematic editor. There is a ready made solution and the supplier insists it will be Datawheet but having read the data sheet I don’t think it will.

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