3175
AND
3177
HALL-EFFECT LATCHES
These Hall-effect latches are temperature-stable and stress-resistant
sensors especially suited for electronic commutation in brushless dc
motors using multipole ring magnets. Each device includes a voltage
regulator, quadratic Hall voltage generator, temperature compensation
circuit, signal amplifier, Schmitt trigger, and an open-collector output on
a single silicon chip. The on-board regulator permits operation with
supply voltages of 4.5 volts to 18 volts. The switch output can sink
10 mA. With suitable output pull up, they can be used directly with
bipolar or MOS logic circuits.
The three package styles available provide a magnetically optimized
package for most applications. Suffix ‘LT’ is a surface-mount SOT-89/
TO-243AA package; suffixes ‘U’ and ‘UA’ feature wire leads for
through-hole mounting.
Data Sheet
27609.4A
V
X
CC
1
2
3
GROUND
OUTPUT
SUPPLY
FEATURES
I
Symmetrical Response
I
4.5 V to 18 V Operation
I
Open-Collector Output
I
Reverse Battery Protection
I
Activate With Small, Commercially Available Permanent Magnets
I
Solid-State Reliability
I
Small Size
I
Superior Temperature Stability
I
Resistant to Physical Stress
Dwg. PH-003A
Pinning is shown viewed from branded side.
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, V
CC
. . . . . . . . . . . . .
18 V
Reverse Battery Voltage, V
RCC
. . . .
-18 V
Magnetic Flux Density, B . . . .
Unlimited
Output OFF Voltage, V
OUT
. . . . . . . .
18 V
Continuous Output Current, I
OUT
.
15 mA
Operating Temperature Range,
T
A
. . . . . . . . . . . . . . .
-20
°
C to +85
°
C
Storage Temperature Range,
T
S
. . . . . . . . . . . . . . .
-65
°
C to +150
°
C
Always order by complete part number, e.g.,
UGN3175LT
.
See Magnetic Characteristics table for differences between devices.
ALLEGRO [ ALLEGRO MICROSYSTEMS ]
