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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鈩?(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擄C and +85擄C, while the A3054KU is rated for operation between

-40擄C and +125擄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

擄

C

Supply Voltage, V

BUS

. . . . . . . . . . . . . .

18 V

Magnetic Flux Density, B . . . . . . .

Unlimited

Operating Temperature Range, T

A

A3054KU . . . . . . . . . . .

-40

擄

C to +125

擄

C

A3054SU . . . . . . . . . . . .

-20

擄

C to +85

擄

C

Storage Temperature Range,

T

S

. . . . . . . . . . . . . . . . .

-55

擄

C to +150

擄

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擄C to +125擄C

-20擄C to +85擄C

where XX = address (01, 02, 鈥?29, 30).

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