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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A simple indicator LED will be fine at 5 mA. Post as a guest Name. You can edit your question and then click on the icon that looks like a schematic symbol, and it will load the schematic editor. And that supply current is also the main part of the current that feeds outputs. It would have been so simple to use a current drain driver but sadly it’s not an option. Data sheet is here: Datasheet on to your supplier and ask them to justify their datssheet.
The IC has a global limit of 70 mA. My belief is that turning on all 8 outputs at 20 ma exceeds the IC max current.
Sign up using Email and Password. My solution is to use 74hct537n channel mosfets to switch the power. You should make sure that the design actually tries to do that. Maybe you will be OK afterall, or maybe a simple part change can fix everything up.
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. This website has a built-in schematic editor. Glad to know i’m not going nuts. I have no control over end devices.
74HCTN 데이터시트(PDF) – NXP Semiconductors
You are not wrong. It’s not always LED’s but they are non inductive. I’ve been reading a lot of data sheets of late looking for chips that will work for a small project. Sign up or log in Sign up using Google. Sign up using Facebook. 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. Email Required, but never shown.
I’m hoping someone can help a noob out here. However, driving a LED at 20 mA is often unnecessary today. Home Questions Tags Users Unanswered. I should have added darasheet there are 2 LEDS being driven from each output.
74HC573; 74HCT573 Octal D-type Transparent Latch; 3-state
Q are 8 outputs and attach to equipment that requires 20 ma.