10 Sensing and Productivity Solutions
applications, promoting energy efficiency.
Subminiature package size (SS311PT)
allows for compact design. SS311PT is
available on tape and reel for high volume,
automated component placement, helping
to reduce manufacturing costs. Potential
applications include speed and RPM
sensing, brushless dc motor commutation,
tachometer, counter pickup, motor and
fan control, flow-rate sensing, and robotics
control.
SS340RT, SS440R Series.
Features: Unipolar magnetics: SS340RT
responds to North pole; SS440R responds
to South pole • Subminiature package size
(SS340RT) • Multiple magnetic sensitivities
(high, medium and low) • Low voltage
3 V capability • Built-in reverse polarity
protection • Thermally balanced integrated
circuit over full temperature range
Benets: Supplied in three different
magnetic sensitivities to meet wide range
of potential applications. The SS341RT and
SS441R offer the highest sensitivity, with
a typical operating point of 85 G at 25 °C
[77 °F]; the SS343RT and SS443R offer
medium sensitivity with 125 G typical at
25 °C [77 °F]; the SS349RT and SS449R
offer the lowest sensitivity, requiring 350
G typical to operate at 25 °C [77 °F]. The
SS340RT’s small size requires less PC board
space, allowing it to be used in smaller
assemblies. Its 3 V capability allows for
use in low voltage applications, promoting
energy efficiency. The SS340RT Series is
available on tape and reel (3000 units per
reel); the SS440R Series is available in a
bulk package (1000 units per bag). Potential
applications include door or lid closure
detection, speed and RPM sensing in fitness
equipment, flow rate sensing, damper or
valve position control, cylinder position
monitoring, float-based fluid level sensing
and printer head position sensing.
SS345PT, SS445P.
Features: Unipolar magnetics
• Subminiature package size (SS345PT)
• Tape and reel packaging (SS345PT)
• Small, flat TO-92-style package (SS445P)
• Simple activation from a North pole
(SS345PT) or a South pole (SS445P) • Low
voltage 2.7 V capability • Built-in pull-up
resistor
Benets: Subminiature package size
(SS345PT) uses less space on the PCB
than standard Hall-effect sensor packages
such as flat TO-92-style or SOT-89B,
allowing for use in smaller assemblies.
Tape and reel packaging (SS345PT) allows
for automated component placement,
helping to reduce manufacturing costs.
Small, flat TO-92-style package (SS445P) is
also available. 2.7 Vdc to 7 Vdc capability
allows for use in low voltage applications,
promoting energy efficiency. Built-in pull-up
resistor can easily interface with common
electronic circuits without adding external
components, helping to reduce total
system cost. Simple activation from a North
pole (SS345PT) or a South pole (SS445P).
Potential applications include speed and
RPM sensing in fitness equipment, flow
rate sensing in appliances and industrial
processes, displacement sensor in
hospital beds and medical equipment and
medication bin monitor on portable drug
carts.
SS351AT, SS451A, SS551AT.
Features: Omnipolar magnetics
• Small through-hole and surface mount
(SOT-23 and SOT-89B) packages
• Simple activation from either South pole
or North pole • Low voltage 3 V capability
• Built-in reverse polarity protection
• Thermally balanced integrated circuit
over full temperature range
Benets: Available in three package
styles: SS351AT in the subminiature
SOT-23 surface mount; the SS551AT in
the SOT-89B surface mount, and the
SS451A in the leaded, flat TO-92-style.
The SS351AT’s small size requires less
PC board space, allowing it to be used in
smaller assemblies. Its 3 Vdc capability
allows for use in low voltage applications,
promoting energy efficiency. Subminiature
package size (SS351AT) supplied on tape
and reel allows for a compact design with
automated component placement, helping
to reduce manufacturing costs. Operated
by a North pole or a South pole, these
products do not require the magnet polarity
to be identified, thus making the installation
easier and potentially reducing system
cost. Built-in reverse polarity protection
protects the device from potential damage
during installation. Thermally balanced
integrated circuit provides for stable
operation over a wide temperature range.
Potential applications include speed and
RPM (revolutions per minute) sensing in
fitness equipment, magnetic encoder for
building access, damper or valve position
control in HVAC (heating, ventilation and
air conditioning) equipment, flow rate
sensing in appliances and industrial
processes, robotic control (cylinder position
monitoring), displacement sensor in
hospital beds, and medical equipment.
SS360NT, SS360ST, SS360ST-10K,
SS460S, SS460S-T2.
Features: Fastest response time in its
class • No chopper stabilization
• High sensitivity • Latching magnetics
• Sub-miniature, SOT-23 surface mount
package (SS360NT, SS360ST, SS360ST-
10K) supplied on tape and reel • Small,
leaded, flat TO-92-style package (SS460S,
SS460St-T2) • Wide operating voltage
range of 3 Vdc to 24 Vdc • Built-in reverse
voltage • Durable design • RoHS-
compliant material
Benets: Fastest response time in its class
provides more efficiency in commutating
brushless dc motors. No chopper
stabilization results in a clean output signal.
Operates from only 30 Gauss typical, at
25°C [77 °F] and 55 Gauss maximum over
the full -40 °C to 150 °C [-40 °F to 302 °F]
temperature range, allowing for the use
of smaller, magnets or a wider air gap.
Latching magnetics make these products
well-suited for accurate speed sensing and
RPM measurement; the SS360NT is turned
ON by a North pole while the SS360ST
and SS460S are turned ON by a South
pole. Small size allows for compact design
with automated component placement, as
well as compact PC board layout. Wide
operating voltage range allows for potential
use in a wide range of applications. Built-in
reverse voltage enhances the protection
of the sensor and the circuits. Durable
design allows operation up to 150 °C
[302 °F]. Potential applications include
industrial/commercial brushless dc motor
commutation, flow rate sensing and motor
and fan control; transportation speed and
RPM sensing, tachometer, counter pickup
and convertible roof position; medical
equipment using electric motors.
