3054
MULTIPLEXED
TWO-WIRE
HALL-EFFECT SENSOR ICs
3054
MULTIPLEXED TWO-WIRE
HALL-EFFECT SENSOR ICs
The A3054KU and A3054SU Hall-effect sensors are digital mag-
netic sensing ICs capable of communicating over a two-wire power/
signal bus. Using a sequential addressing scheme, the device re-
sponds to a signal on the bus and returns the diagnostic status of the
IC, as well as the status of each monitored external magnetic field.
As many as 30 sensors can function on the same two-wire bus. This
IC is ideal for multiple sensor applications where minimizing the wiring
harness size is desirable or essential.
Each device consists of high-resolution bipolar Hall-effect switch-
ing circuitry, the output of which drives high-density CMOS logic
stages. The logic stages decode the address pulse and enable a
response at the appropriate address. The combination of magnetic-
field or switch-status sensing, low-noise amplification of the Hall-
transducer output, and high-density decoding and control logic is made
possible by the development of a new sensor DABiC™ (digital analog
bipolar CMOS) fabrication technology. The A3054SU is an improved
replacement for the original UGN3055U.
These unique magnetic sensing ICs are available in two tempera-
ture ranges; the A3054SU operates within specifications between
-20°C and +85°C, while the A3054KU is rated for operation between
-40°C and +125°C. Alternative magnetic and temperature specifica-
tions are available on special order. Both versions are supplied in
0.060" (1.54 mm) thick, three-pin plastic SIPs. Each device is clearly
marked with a two-digit device address (XX).
Data Sheet
27680.1
LOGIC
1
2
GROUND
BUS
Dwg. PH-005
Pinning is shown viewed from branded side.
SWITCH IN
ABSOLUTE MAXIMUM RATINGS
at T
A
= +25
°
C
Supply Voltage, V
BUS
. . . . . . . . . . . . . .
18 V
Magnetic Flux Density, B . . . . . . .
Unlimited
Operating Temperature Range, T
A
A3054KU . . . . . . . . . . .
-40
°
C to +125
°
C
A3054SU . . . . . . . . . . . .
-20
°
C to +85
°
C
Storage Temperature Range,
T
S
. . . . . . . . . . . . . . . . .
-55
°
C to +150
°
C
Package Power Dissipation,
P
D
. . . . . . . . . . . . . . . . . . . . . . .
635 mW
X
3
FEATURES
s
s
s
s
s
s
s
Complete Multiplexed Hall-Effect ICs with
Simple Sequential Addressing Protocol
Allows Power and Communication Over a
Two-Wire Bus (Supply/Signal and Ground)
Up to 30 Hall-Effect Sensors Can Share a Bus
Sensor Diagnostic Capabilities
Magnetic-Field or Switch-Status Sensing
Low Power of DABiC Technology Favors
Battery-Powered and Mobile Applications
Ideal for Automotive, Consumer, and Industrial Applications
Always order by complete part number:
Part Number
A3054KU-XX
A3054SU-XX
Operating Temperature Range
-40°C to +125°C
-20°C to +85°C
where XX = address (01, 02, … 29, 30).
ALLEGRO [ ALLEGRO MICROSYSTEMS ]
