As a safety precaution, these analog sensors are packaged in the Tape & Reel (TR). For the protection of the analog sensors, they are packaged in 20-TSSOP (0.173, 4.40mm Width) packages. For the proper operation of this sensor, there are 20 pins. DC circuits should operate with a maximum voltage of 5.5V. However, the minimum voltage that this magnetic switch can supply in the DC circuit is 3V. When the analog sensors are operating, they would provide 5.5V voltage. This device has 20 pins.