Datasheet

UNISONIC TECHNOLOGIES CO., LTD
UHE4913
CMOS IC
LOW POWER HALL EFFECT
SWITCH

DESCRIPTION
UHE4913 is a low-power integrated Hall switch designed to
sense the applied magnetic flux density and give a digital output,
which indicates the present condition of the magnitude sensed.
It is mainly designed for battery-powered system and
hand-held equipment, such as cellular flip-phones and PDA’s, in
which power consumption is one major concern. The typical power
consumption of UHE4913 is down to 10μW in 2.7V supply.
The output will be at the “High” level when no magnetic field is
applied. When the applied magnetic flux density is stronger than
the switching threshold, the output would be at the “Low” level.

FEATURES
* Micropower Operation
* 2.4V to 5.5V Battery Operation
* Switching for both poles of magnet
* Offset Canceling Technology
* Superior Temperature Stability
* Extremely Low Switch-Point Drift
* Insensitive to Physical Stress

ORDERING INFORMATION
Ordering Number
UHE4913G-AE3-R
Note: Pin Assignment: O: Output
I: VDD

Package
SOT-23
Pin Assignment
1
2
3
O
I
G
Packing
Tape Reel
G: GND
MARKING
3
UEMG
2
1
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QW-R502-608.C
UHE4913
CMOS IC

PIN CONFIGURATION

PIN DESCRIPTION
PIN NAME
PIN TYPE
VOUT
O
Digital Output
VDD
I
Power Supply
GND
G
Ground
Note: O=Output, I=Power Supply, G=Ground

PIN DESCRIPTION
BLOCK DIAGRAM
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Logic Control
AMP
Offset cancelling
UNISONIC TECHNOLOGIES CO., LTD
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QW-R502-608.C
UHE4913

CMOS IC
ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
RATINGS
UNIT
Supply Voltage
VDD
5.5
V
Supply current
IQ
-1 ~ +2.5
mA
Magnetic Flux Density
B
Unlimited
mT
Junction Temperature
TJ
150
°C
Operation Temperature
TOPR
-40 ~ +85
°C
Storage Temperature
TSTG
-40 ~ +150
°C
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.

RECOMMENDED OPERATING CONDITIONS (TA=25°C)
PARAMETER
Supply Voltage
Output Voltage
Ambient Temperature

CONDITIONS
Operating
MIN
2.4
-0.3
-40
TYP
2.7
2.7
25
MAX
5.5
5.5
85
UNIT
V
V
°C
MIN
TYP
0.1
0.01
1.1
2.5
3
50
130
0.04
0.5
0.1
MAX
UNIT
V
μA
mA
μA
μA
μs
ms
%
μs
μs
ELECTRICAL CHARACTERISTICS (TA=25°C)
PARAMETER
Output Saturation Voltage
Output Leakage Current
Supply Current
Operating Time
Standby Time
Duty Cycle
Output Rise Time
Output Fall Time

SYMBOL
VDD
VOUT
TA
SYMBOL
VSAT
IOFF
IDD(EN)
IDD(DIS)
IDD(AVG)
TOP
TSD
D.C.
tR
tF
CONDITIONS
VDD=2.7V
VDD=2.7V
VDD=2.7V
RL=2.7KΩ,CL=10PF
RL=2.7KΩ,CL=10PF
20
1
1
MAGNETIC CHARACTERISTICS ( TA=25°C,VDD=2.7V)
PARAMETER
Operation Points
Release Points
Hysteresis
SYMBOL
|BOP|
|BRP|
|BOP–BRP|
MIN
20
12
2
UNISONIC TECHNOLOGIES CO., LTD
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TYP
35
27
8
MAX
50
42
16
UNIT
Gauss
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UHE4913

TYPICAL APPLICATION CIRCUIT

MAGNETIC FLUX
CMOS IC
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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