US5881ESE Melexis Inc, US5881ESE Datasheet - Page 8

• Manufacturer Part Number: US5881ESE
• Description: IC HALL EFFECT SW TSOT-23
• Manufacturer: Melexis Inc
• Type: Unipolar Switchr

Specifications of US5881ESE

• Sensing Range: 30mT Trip, 9.5mT Release
• Voltage - Supply: 3.5 V ~ 24 V
• Current - Supply: 5mA
• Current - Output (max): 50mA
• Output Type: Digital, Open Drain
• Features: Regulated Voltage
• Operating Temperature: -40°C ~ 85°C
• Package / Case: TO-236-3, SC-59, SOT-23-3
• Other names: US5881ESETR

Rotary Interrupt Switch
The interrupt switch can be incorporated in applications of speed or position sensing, generally of rotat-
ing objects. The Rotary Interrupt Switch, in Figure 6, uses a toothed ring to interrupt the magnetic field
reaching the Hall IC. When a solid piece of steel (ferrous vane) blocks the magnetic field, the switch turns
OFF. During the gaps, or spaces in the steel, the South magnetic pole turns ON the switch. This is the sys-
tem commonly used for automotive ignition and many industrial applications, where accurate position is
critical.
Figure 6, Rotary Interrupt Switch
Figure 6 uses a notched
interrupter on a rotating
shaft to activate the device.
Figure 6
S
N
A-10
Section 3 - Applications
3-6