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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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. Hi, basic schematic added. Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policydatwsheet that your continued use of the website is subject to these policies.

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

By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. You are not wrong. You should make sure that the 7hct573n actually tries to do that. A simple indicator LED will be fine at 5 mA. The IC has a global limit of 70 mA. Nik Middleton 6 5. My belief is that turning on all 8 outputs at 20 ma exceeds the IC max current. Sign up using Email and Password.


It’s not always LED’s but they are non inductive. The load is between the IC and ground source current? Get on to your supplier and ask them to justify their thoughts. Datashret up using Facebook.


You can edit your question and then click on the icon that looks like a schematic symbol, and it will load the schematic editor. Post as a guest Name. And that supply current is also the main part of the current that datashet outputs. Email Required, but never shown.

My solution is to use P channel mosfets to switch the power. Data sheet is here: This website has a built-in schematic editor. I should have added that there are 2 LEDS being driven from each output. Q are 8 outputs and attach to equipment that requires 20 ma. I’ve been reading a lot of data sheets of late looking for chips that will work for a small project.

However, driving a LED at 20 mA is often unnecessary today. I’m hoping someone can help a 74hct573nn out here. I have no control over end devices. Sign up or log in Sign up using Google. By clicking “Post Your Answer”, you acknowledge that you have read our updated 74hcg573n of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies.


Would really appreciate some input. Home Questions Tags Users Unanswered. There is a ready made solution and the supplier insists it will be OK but having read the data sheet I don’t think it will. Glad to know i’m not going 74hcy573n. I’m loosing some voltage 4. It would have been so simple to use a current drain driver but sadly it’s not an option.

Adtasheet understanding is that is has a max of 35 mA per pin, but a total of 70 mA for the IC. Maybe you will be OK afterall, or maybe a simple part change can fix everything up.