CTD501 User Manual
Digital Switch
Demo Board
Relevant Products:
CT512 Integrated Digital Switch
26 mm
Relevant Documents:
CT512 Datasheet
AN109: Smart Lock
AN112: Reed Switch Replacement
20 mm
Introduc on
This document provides general informa on about the design and func onality of the Crocus demonstra on board
for detec on of a magne c field. The small arrow illustrated next to the CT512 device denotes the north pole polari-
ty conven on. Enclosed with the CTD501 demo board is a magnet for switching the CT512 and status LED.
Func onality
The CTD501 is ba ery operated and remains con nuously powered. In the presence of a low or no magne c field or
north pole polarity, the CT512 output remains HIGH and the LED remains turned off. When the CT512 detects a
south pole magne c field greater than the opera ng switch point, Bop, the output switches LOW and the LED is turns
on.
Output Behavior versus Magne c Field:
Characteris c
South Pole
Null or weak magne c field
North Pole
Condi ons
B > Bop
B < Brp
B > Bop
CT512 Output
Low
High
High
LED
ON
OFF
OFF
2016 Crocus Technology
Doc#: CTD501 - User Manual Note Rev 0.1
Page 1
CTD501 User Manual
Digital Switch
Demo Board
Disclaimer: The contents of this document are provided in connec on with products of Crocus Technology (Crocus). CROCUS
TECHNOLOGY MAKES NO REPRESENTATIONS OR WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH RESPECT TO THE ACCURA-
CY OR COMPLETENESS OF THE CONTENTS HEREIN, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE AND RESERVES THE RIGHT TO MAKE CHANGES TO THE SPECIFI-
CATIONS AND PRODUCT DESCRIPTIONS AT ANY TIME WITHOUT NOTICE. Crocus reserves the right to discon nue or make chang-
es to its products at any me without no ce. Crocus’s products have not been designed, tested, or manufactured for use and
should not be used in applica ons where the failure, malfunc on or inaccuracy of the Products carries a risk of death or serious
bodily injury or damage to tangible property, including, but not limited to, life support systems, nuclear facili es, military, aircra
naviga on or communica on, emergency systems, harsh environments, or other applica ons with a similar degree of poten al
hazard.
ATTRIBUTION
© 2015 Crocus Technology, Inc. and Crocus Technology SA. All rights reserved. Crocus Technology, Blossoming Future, MLU, and
combina ons thereof are trademarks of Crocus Technology, Inc. and Crocus Technology SA.
2016 Crocus Technology
Doc#: CTD501 - User Manual Note Rev 0.1
Page 3