TSH251

Micropower CMOS Output Hall Effect Switch

1/8

Version: B14

TO-92S

TSOT-23

Description

TSH251 Hall-effect sensor is a temperature stable, stress-resistant, Low Tolerance of Sensitivity micro-power

switch. Superior high-temperature performance is made possible through a dynamic offset cancellation that

utilizes chopper-stabilization. This method reduces the offset voltage normally caused by device over molding,

temperature dependencies, and thermal stress. TSH251 is special made for low operation voltage at 1.65V, to

active the chip which is includes the following on a single silicon chip: voltage regulator, Hall voltage generator,

small-signal amplifier, chopper stabilization, Schmitt trigger, CMOS output driver. Advanced CMOS wafer

fabrication processing is used to take advantage of low-voltage requirements, component matching, very low

input-offset errors, This device requires the presence of omni-polar magnetic fields for operation.

Features

●

CMOS Hall IC Technology

●

Strong RF noise protection

●

1.65 to 3.5V for battery-powered applications

●

Omni polar, output switches with absolute value of

North or South pole from magnet

●

Operation down to 1.65V, micropower consumption

●

High Sensitivity for reed switch replacement

applications

●

Low sensitivity drift in crossing of Temp. range

●

Ultra Low power consumption at 5µA (avg.)

●

High ESD Protection, HBM > ±4KV( min )

●

Totem-pole output

Ordering Information

Part No.

Package

Packing

TSH251CT B0G

TO-92S

1kpcs / Bulk Bag

TSH251CX RFG

TSOT-23

3kpcs / 7” Reel

Note: “G” denote for Halogen Free Product

Application

●

Solid state switch, Water Meter, Floating Meter

●

Handheld Wireless Handset Awake Switch

(Flip Cell/PHS Phone/Note Book/Flip Video Set)

●

Lid close sensor for battery powered devices

●

Magnet proximity sensor for reed switch

replacement in low duty cycle applications

Characteristics

Limit

Value

Unit

Supply voltage

4.5

V

Output Voltage

4.5

V

Reverse Voltage

-0.3

V

Magnetic flux density

Unlimited

Gauss

Output current

1

mA

Operating temperature range

-40 to +85

Storage temperature range

-65 to +150

Maximum Junction Temp

150

Thermal Resistance - Junction to Ambient

TO-92S

206

TSOT-23

543

Thermal Resistance - Junction to Case

TO-92S

148

TSOT-23

410

Package Power Dissipation

TO-92S

606

mW

TSOT-23

230

Note: Exceeding the absolute maximum ratings may cause permanent damage. Exposure to absolute maximum-

rated conditions for extended periods may affect device reliability.

Pin Definition:

2. GND

3. Output

Pin Definition:

2. Output

3. GND