IXYS
Features:
•
•
•
•
•
•
•
•
µPower Operation (15 µW typical at 25°C)
Omni polar (switches with N or S pole)
2.5 to 5.5 Volt Operation
Simple Digital Output Interfacing
CMOS Push-Pull
Ultra Low Offset Canceling Amplifiers Provide
Sensitive, Accurate, Stable Switching Points
and Immunity to Mechanical Stress
Solid State Circuitry
Operating Temperature Range: -40°C to +85°C
RoHS Compliant TSOT-23 3 Lead Package
MX887P
µPower Hall-Effect Switch
General Description
The MX887P integrated Hall-Effect switch targets
the requirements of low-power portable devices with
battery operating voltages from 2.5V to 5.5V. On-
chip power management circuitry reduces the
effective average current to just 5µA at 3.0 V
SUPPLY
.
The switch output will transition to the Ground
potential when either a north or south magnetic pole
is applied. The removal of a magnetic field will
transition the switch to the Vsupply potential.
Emulating the behavior of a traditional reed switch,
together with the advantages of high integration and
solid state reliability, makes the MX887P is an ideal
replacement in low-power portable device
applications.
Applications:
Ordering Information
Qty
Part No.
Description
MX887PHTTR TSOT-23 3L Tape & Reel 3000
•
•
•
•
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Handheld Portable Devices
White Goods
Automotive - Body Systems
Security Systems
High Reliability Reed Switch Replacement
Functional Block Diagram
Vsupply
Power Management Logic
Switch
Output
Latch
Hall
Sensor
Offset Cancellation
Output
Ground
MX887P
Drawing No. 088709
1
7/19/07
www.claremicronix.com
MX887P
Pin Description
Pin No.
1
2
3
Pin Name
V
SUPPLY
OUT
GROUND
Description
2.5 to 5.5 Volt
CMOS Push-Pull
Ground
IXYS
Circuit Description
The MX887P µPower Hall-Effect Switch consists of a Hall element, small signal amplifier, latch, and
CMOS push-pull driver. Offset cancellation rejects errors in signal stages and the influence of mechanical
stress on the Hall element. This technique together with a precision threshold generator and comparator
produce highly accurate magnetic switch points. The Hall element is activated for a small fraction of an
operating cycle, then latched in that sample state for the remainder of the period. By using this technique,
very low power consumption is achieved.
Electrical Characteristics
Over operating voltage and temperature range unless otherwise noted.
Parameter
Condition
Supply Voltage
Output Leakage Current
V
OUT
= 5.5V, B
RPN
< B < B
RPS
Output On Voltage
I
OUT
= 1mA, V
DD
= 3.0V
Awake Time
Period
Duty Cycle
Supply Current
ESD
Awake (enabled)
Asleep (disabled)
Average (Calculated)
Human Body Model
Min
2.5
Typ
<1.0
100
Max
5.5
1.0
300
90
90
0.1
2.0
8.0
15
Unit
V
µA
mV
µS
mS
%
mA
µA
µA
kV
5
2
Notes: 1. Operating and release points will vary with supply voltage.
2. B
OPX
= operating point (output turns ON); B
RPX
= release point (output turns OFF).
3. Typical Data is at T
A
= 25°C and V
SUPPLY
= 3.0V.
Magnetic Characteristics
Over operating voltage and temperature range unless otherwise noted.
Parameter
Symbol
Condition
South pole to branded side
B
OPS
Operating Points
North pole to branded side
B
OPN
South pole to branded side
B
RPS
Release Points
North pole to branded side
B
RPN
Hysteresis
B
HYS
| B
OPX
– B
RPX
|
Min
-60
6
-6
5
Typ
Max
60
Unit
G
G
G
G
G
Notes: 1. As use here, negative flux densities are defined as less than zero (algebraic convention) and -50G is less than +10G.
2. B
OPX
= operating point (output turns ON); B
RPX
= release point (output turns OFF).
3. Typical Data is at T
A
= 25°C and V
SUPPLY
= 3.0V.
MX887P
Drawing No. 088709
2
7/19/07
www.claremicronix.com
MX887P
IXYS
IXYS Corporation makes no representations or warranties with respect to the accuracy or completeness of the contents of this
publication and reserves the right to make changes to specifications and product descriptions at any time without notice. Neither
circuit patent licenses nor indemnity are expressed or implied. Except as set forth in IXYS’ Standard Terms and Conditions of Sale,
IXYS Corporation assumes no liability whatsoever, and disclaims any expressed or implied warranty, relating to its products
including, but not limited to, the implied warranty of merchantability, fitness for a particular purpose, or infringement of any
intellectual property right
.
MX887P
Drawing No. 088709
3
7/19/07
www.claremicronix.com
IXYS
IXYS Corporation
3540 Bassett Street
Santa Clara, CA 925054
Tel: 1-408-892-0700
Fax: 1-408-496-0670
e-mail:sales@ixys.net
Micronix
An
IXYS
Company
145 Columbia
Aliso Viejo, CA 92656-1490
Tel: 1-949-831-4622
Fax: 1-949-831-4628
World Wide Sales Offices
United Kingdom
IXYS Semiconductor Limited
Langley Park Way
Langley Park
Chippenham
Wiltshire SN 15 1GE - England
Tel: 44 1249 444524
Fax: 44 1249 659448
sales@ixys.co.uk
Sales Offices ASIA / PACIFIC
Asian Headquarters
IXYS
Room 1016, Chia-Hsin, Bldg II,
10F, No. 96, Sec. 2
Chung Shan North Road
Taipei, Taiwan R.O.C.
Tel: 886-2-2523-6368
Fax: 886-2-2523-6368
bradley.green@ixys.co.uk
Jhong@clare.com
SALES OFFICES AMERICAS
Eastern Region
[Eastern North America, Mexico, South America]
IXYS Corporation
Beverly, MA
Tel: 508-528-6883
Fax: 508-528-4562
wgh@ixys.net
Central Region
[Central North America]
IXYS Corporation
Greensburg, PA
Tel: 724-836-8530
Fax: 724-836-8540
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Western Region
[Western North America]
IXYS Corporation
Solana Beach, CA
Tel: 858-792-1101
slodor@ix.netcom.com
Check the IXYS Website for the local sales
office nearest you. (www.ixys.com)
SALES OFFICES EUROPE
European Headquarters
IXYS Semiconductor GMBH
Edisonstrasse 15
D- 68623 Lampertheim
Germany
Tel: 49-6206-503203
Fax: 49-6206-503286
marcom@ixys.de
http://www.claremicronix.com
IXYS cannot assume responsibility for use of any circuitry other than circuitry
entirely embodied in this IXYS product. No circuit patent licenses nor indemnity
are expressed or implied. IXYS reserves the right to change the specification and
circuitry, without notice at any time. The products described in this document are
not intended for use in medical implantation or other direct life support
applications where malfunction may result in direct physical harm, injury or death
to a person.
Specification: MX887P
©Copyright 2007, IXYS Corporation
All rights reserved. Printed in USA.
MX887P
Drawing No. 088709
4
7/19/07
www.claremicronix.com
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