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You know us as a leader, whether you’ve known us as MICRO
SWITCH™ or Honeywell Sensing and and Productivity Solutions
(S&PS). In 1968, we revolutionized the industry with the first solid-
state keyboard combining Hall-effect sensing and associated
electronics in a single circuit. Today, the Honeywell S&PS
family of magnetic position sensors includes digital and analog
Hall-effect position, magnetoresistive digital, Hall-effect vane,
gear-tooth, and Hall-effect basic switches and magnets. These
high-speed, extended life sensors are often directly compatible
FEATURES
LOW POWER HALL-EFFECT
SENSOR ICS - DIGITAL
SL353 Series.
Features: Energy efficient • Push-pull
output • Non-chopper stabilized design
• Omnipolar magnetics • Thermally
balanced integrated circuit • Subminiature
package size • Simple activation from a
North pole or a South pole • Tape and reel
packaging
Benets: Supply voltage as low as 2.2
Vdc, combined with very low average
current of 1.8 μA typ., reduces power
consumption, provides extended battery
life, and promotes energy efficiency.
Push-pull output does not require external
pull-up resistor, simplifying interface
with common electrical circuits and
potentially reducing PC board space and
costs to the customer. Does not utilize
chopper stabilization, eliminating the
noise generated by products using this
technique, meaning that customers do not
need filters to compensate for the noise.
Omnipolar capability with high and low duty
cycle options allows for use in a variety
of potential applications with low power
requirements and/or battery operation.
Magnetic Sensors
Line Guide
continued on page 10
Thermally balanced integrated circuit
provides for stable operation over a wide
temperature range, of -40° to 85 °C
[-40° to 185 °F]. SOT-23 subminiature
package requires less PCB space, allowing
for use in smaller assemblies. North pole
or South pole operation does not require
the magnet polarity to be identified, making
installation easier and potentially reducing
system costs. Supplied on tape and reel
which allows for a compact design with
automated component placement, helping
to reduce manufacturing costs. Potential
applications include motion control, lid
closure detection, presence-absence,
metering, and displacement sensing on
battery-operated, mobile equipment such
as computer notebooks, scanners, hand-
held industrial computers, instrumentation
and appliances.
HALL-EFFECT SENSOR ICS -
DIGITAL
SS30AT, SS40A, SS50AT.
Features: Bipolar magnetics • Sinking
output • High output current capability
• High speed capability • Reverse polarity
protection • Small through-hole and
surface mount (SOT-23 and SOT-89B)
packages • Tape and reel available
Benets: Integrated circuitry provides
enhanced temperature stability in a robust
design. Thermally balanced integrated
circuit over full temperature range. Built-in
regulator provides stable operation over
supply voltage range. Open-collector
sinking output voltage easily interfaces with
wide variety of electronic circuits. Internal
circuitry prevents sensor damage in case
supply voltage polarity is accidentally
reversed. Potential applications include
speed and RPM sensing, brushless dc
motor commutation, motor and fan control,
magnetic encoding, disc speed, tape
rotation, and flow-rate sensing.
SS311PT, SS411P.
Features: Bipolar magnetics • Enhanced
sensitivity • Built-in pull-up resistor • Low
voltage: 2.7 Vdc to 7 Vdc • Subminiature
package size (SS311PT) • Through-hole
and surface-mount (SOT-23 and SOT-89B)
packages • Cost effective
Benets: Enhanced sensitivity often allows
for use of smaller, less expensive magnets.
Built-in pull-up resistor easily interfaces with
common electronic circuits without adding
external components, helping to reduce
total system cost. 2.7 Vdc to 7 Vdc supply
voltage range allows use in low voltage
with other electronic circuits, responding to the presence or
the interruption of a magnetic field by producing a proportional
output. Gear-tooth and other packaged Hall-effect speed and
direction sensors sense movements of a ferrous metal target.
Digital and analog “sensor-only” devices are operated by a
permanent magnet or electromagnet, while actuation mode
depends on the type of magnets used. A vane passing through a
gap or a magnet mounted on a plastic plunger operates integral
magnet position sensors.
