FSH4917

Features:

  FEATURES
  Micro power design
  Operation with North or South pole(omni polar)
  2.4V to 5.5V battery operation
  High sensitivity and high stability of the magnetic
switching points
  High resistance to mechanical stress
  Digital output signal
  Good RF noise immunity
  -40 to 85 operating temperature
  Programming pin for switching detection of output
  Package: SOT23-6L


Specifications

  ABSOLUTE MAXIMUM RATINGS
Caution: Stress above the listed absolute maximum rating may cause permanent damage to the device
Parameter Symbol Maximum Unit
Supply Voltage VDD 5.5 V
Supply Current IDD 2.5 mA
Output Voltage VO 5.5 V
Output Current IO 1 mA
PRG Input voltage VPRG 5.5 V
Operating Temperature Range TOP -40 to 85
Junction Temperature TJ -40 to 150
Storage Temperature TSTG -40 to 150
Magnetic Flux Density B unlimited mT
Power Dissipation PD 230 mW


Description

  GENERAL DESCRIPTION
The FSH4917 is an Integrated Hall Effect Sensor
designed specifically to meet the requirements of lowpower
devices. e.g. as an On/Off switch in Cellular
Flip-Phones, with battery operating voltages of 2.4V
5.5V.
Precise magnetic switching points and high temperature
stability of FSH4917 are achieved through the unique design of the
internal circuit.
An onboard clock scheme is used to reduce the average
operating current of the IC.
During the operate phase the IC compares the
actual magnetic field detected with the internally
compensated switching points. The output of FSH4917 is switched
at the end of each operating phase.
During the Stand-by phase the output stage is latched
and the current consumption of the FSH4917 reduced to
some µA.
The IC switching behavior of FSH4917 is Omni polar, i.e. it can be
switched on with either the North or South pole of a
magnet.
The PRG pin can be connected to VDD which holds the
output VO at a High level for B=0mT; conversely the
output VO can be inverted by connecting the PRG
pin to GND, which will hold the output VO at a Low
level for B=0mT. In this later case the presence of an
adequate magnetic field will cause the output VO to
switch to a High level (i.e. off state).