A1242ELHLT-I1-T Allegro Microsystems Inc, A1242ELHLT-I1-T Datasheet

IC LATCH HALL EFFECT SOT23W

A1242ELHLT-I1-T

Manufacturer Part Number
A1242ELHLT-I1-T
Description
IC LATCH HALL EFFECT SOT23W
Manufacturer
Allegro Microsystems Inc
Type
Unipolar Switchr
Datasheet

Specifications of A1242ELHLT-I1-T

Package / Case
SOT-23W
Sensing Range
80G Trip, -80G Release
Voltage - Supply
3.5 V ~ 24 V
Current - Supply
6.9mA
Output Type
Digital, Open Drain
Features
Regulated Voltage
Operating Temperature
-40°C ~ 85°C
Peak Reflow Compatible (260 C)
Yes
Termination Type
SMD
Supply Voltage Max
24V
No. Of Pins
3
Hall Effect Type
Latching
Supply Voltage Min
3.5V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Current - Output (max)
-
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
Allegro MicroSystems, Inc. reserves the right to make, from time to time, revisions to the anticipated product life cycle plan
for a product to accommodate changes in production capabilities, alternative product availabilities, or market demand. The
information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, Inc. assumes no respon-
sibility for its use; nor for any infringements of patents or other rights of third parties which may result from its use.
Date of status change: January 31, 2011
For existing customer transition, and for new customers or new appli-
cations, contact Allegro Sales.
These parts are in production but have been determined to be
NOT FOR NEW DESIGN. This classification indicates that sale of
this device is currently restricted to existing customer applications.
The device should not be purchased for new design applications
because obsolescence in the near future is probable. Samples are no
longer available.
Recommended Substitutions:
NOTE: For detailed information on purchasing options, contact your
local Allegro field applications engineer or sales representative.
Two-Wire Chopper-Stabilized Hall Effect Latch
Not for New Design
A1242

Related parts for A1242ELHLT-I1-T

A1242ELHLT-I1-T Summary of contents

Page 1

Two-Wire Chopper-Stabilized Hall Effect Latch These parts are in production but have been determined to be NOT FOR NEW DESIGN. This classification indicates that sale of this device is currently restricted to existing customer applications. The device should not be ...

Page 2

Two-Wire Chopper-Stabilized Hall Effect Latch Features and Benefits ▪ Chopper stabilization ▫ Superior temperature stability ▫ Extremely low switchpoint drift ▫ Insensitive to physical stress ▪ Reverse battery protection ▪ Solid-state reliability ▪ Small size ▪ Robust EMC capability ▪ ...

Page 3

... Suffix ‘L-’ devices are rated for operation over a temperature range of –40°C to +150°C; suffix ‘E-’ devices are rated for operation over a temperature range of –40°C to +85°C. Two A1242 package styles Selection Guide Part Number Packaging* A1242ELHLT-I1-T 7-in. reel, 3000 pieces/reel A1242ELHLT-I2-T A1242EUA-I1-T Bulk, 500 pieces/bag A1242LLHLT-I1-T 7-in ...

Page 4

A1242 ELECTRICAL CHARACTERISTICS Characteristic Electrical Characteristics 2 3 Supply Voltage Supply Current 4 Output Slew Rate Chopping Frequency Power-On Time 5 Power-On State Supply Zener Clamp Voltage 6 Supply Zener Current Reverse Battery Current 7 Magnetic Characteristics Operate Point Release ...

Page 5

A1242 THERMAL CHARACTERISTICS may require derating at maximum conditions, see application information Characteristic Package Thermal Resistance *Additional information available on the Allegro Web site ...

Page 6

A1242 Supply Current (Low) versus Ambient Temperature (1242- I1) 7.0 6.8 6.6 6.4 6.2 6.0 5.8 5.6 5.4 5.2 5.0 - (°C) A Supply Current (Low) versus Ambient Temperature (1242- I2) 5.0 4.5 4.0 3.5 3.0 2.5 ...

Page 7

A1242 Operate Point versus Ambient Temperature - (°C) A Release Point versus Ambient Temperature -5 -20 -35 -50 -65 -80 - (°C) A Hysteresis versus Ambient Temperature 110 ...

Page 8

A1242 Operation The output the A1242 switches to the high current state CC when a magnetic field perpendicular to the Hall element exceeds the operate point threshold Note that the device latches, OP that is, ...

Page 9

A1242 Chopper Stabilization Technique When using Hall-effect technology, a limiting factor for switchpoint accuracy is the small signal voltage developed across the Hall element. This voltage is disproportionally small relative to the offset that can be produced at the output ...

Page 10

A1242 Power Derating The device must be operated below the maximum junction temperature of the device Under certain combinations of J(max) peak conditions, reliable operation may require derating sup- plied power or improving the heat dissipation properties of ...

Page 11

A1242 +0.12 2.98 –0.08 3 +0.10 2.90 –0. 10° REF 0.95 BSC For Reference Only; not for tooling use (reference dwg. 802840) Dimensions in millimeters Dimensions exclusive of mold flash, gate burrs, and dambar protrusions Exact case and ...

Page 12

A1242 4.09 45° +0.08 3.02 –0.05 2.16 MAX 0.51 REF 1 15.75 ±0.51 +0.05 0.43 –0.07 Copyright ©2005-2010, Allegro MicroSystems, Inc. Allegro MicroSystems, Inc. reserves the right to make, from time to time, such de par tures from the detail ...

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