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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I’m loosing some voltage 4. You should make sure that the design actually tries to do that. Would really appreciate some input.
A simple indicator LED will be fine at 5 mA. This website has a built-in schematic editor. Get on to your supplier and ask them to justify their thoughts. Q are 8 outputs and attach to equipment that requires 20 ma.
74HC573; 74HCT573 Octal D-type Transparent Latch; 3-state
You can edit your question and then click on the icon that looks like a schematic symbol, and it will load the schematic editor. My belief is that turning on all 8 outputs at 20 ma exceeds the IC max current.
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.
Post as a guest Name. As is stated in the below table the output max current is catasheet for each output, being the nominal current 20mA, enough to control a LED in every output. Data sheet is here: 74cht573n, driving a LED at 20 mA is often unnecessary today.
744hct573n would have been so simple to use a current drain driver but sadly it’s not an option. You are not wrong. Sign up or log in Sign up using Google.
Sign up using Email and Password. The IC has a global limit of 70 mA. I’ve been reading a lot of data sheets of late looking for chips that will work for a small project. I should have added that there are 2 LEDS being driven from each output. Nik Middleton 6 5. Email Required, but never shown. Home Questions Tags Users Unanswered.
My 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.
74HCTN 데이터시트(PDF) – NXP Semiconductors
Glad to know i’m not going nuts. And that supply current is also the main part of the current that feeds outputs. I’m hoping someone can help a noob out here. I have no control over end devices.