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Reset / Enable Controller - KA75330 3.3V Voltage Detector

SKU: ADA3428

$0.83 AUD, inc GST
$0.76 AUD, exc GST

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Reset / Enable Controller - KA75330 3.3V Voltage Detector
0.8328 AUD

SKU: ADA3428

$0.83 AUD, inc GST
$0.76 AUD, exc GST
In stock, with a short lead time. 149 units dispatch in 4 to 7 days (in addition to the shipping method you choose). Our timing and stock is accurate. Delivery to you by Wed, 1st of Nov with Express Post within Australia.

A voltage detector is handy for projects where you want to make sure your microcontroller doesn't run at a low voltage. For example, say you have a Feather Huzzah running on a lipoly battery every few minutes. Eventually the battery runs down, and goes below 3.3V, so the voltage to the ESP8266 core is too low, and could cause a lockup or corrupted data. Or maybe your battery is already drained and you're trying to charge it back up, but as you are trying to charge it up, the Huzzah turns on and the spike of current drains the battery immediately so it never gets through the trickle-charging stage.

This little chip is a simple solution: It monitors the voltage on one Input pin, and when that voltage goes below 3.3V, it will pull the  Output pin low. If you connect that Output pin to the Enable pin on the Feather, it will make sure that the Huzzah does not run if the battery dips too low.

The KA75330 starts running at voltages as low as 0.8V so it'll be the first thing in your circuit that starts up. This little helper can really ease power start-up issues! Works best with microcontrollers and boards that have an Enable pin that is normally pulled high to enable function, and pulled to ground to disable.

This regulator requires at least 2,2uF electrolytic capacitors on both input and output for stability, just make sure your power supply already has those (it almost certainly does)!

Technical Details

Product Dimensions: 19.0mm x 4.6mm x 3.5mm / 0.7" x 0.2" x 0.1"

Product Weight: 0.2g / 0.0oz

Documentation and Resources:

Product Comments

We deliver Australia-wide with these options:

  • $3 for Small Items (4-6 days, not tracked, only available on selected small items)
  • $6.95 for Standard Post (2-4 days, tracked)
  • $8.32 for Express Post (1-2 days, tracked)
  • Pickup - Free! Only available to customers who live in the Newcastle region (only after we email you to notify your order is ready)

International Orders - the following rates are for New Zealand and will vary for other countries:

  • $11.49 for Pack and Track (3+ days, tracked)
  • $16.50 for Express International (2-5 days, tracked)

If you order lots of gear, the postage amount might increment based on the weight of your order.

Our physical address:

Unit 18, 132 Garden Grove Parade
Adamstown
NSW, 2289
Australia

Please checkout our customer service page if you have other frequently asked questions such as "do we do purchase orders" (yes!) or "are prices GST inclusive" (yes they are!). We're here to help - get in touch with us to talk shop.