SS259 반도체 회로 부품 판매점
CMOS Omnipolar High Sensitivity Micropower Hall Switch
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 SEC |
SS259
CMOS Omnipolar High Sensitivity Micropower Hall Switch
Packages
3 pin SOT23 (suffix SO)
3 pin SIP (suffix UA)
Functional Block Diagram
Features and Benefits
– Operation down to 2.5V
– Micropower consumption for battery
powered applications
– High sensitivity for direct reed switch
replacement applications
– Omnipolar, output switches with absolute
value of North or South pole from magnet
Application Examples
– Solid-state switch
– Handheld Wireless Handset Awake Switch
– Lid close sensor for battery powered devices
– Magnet proximity sensor for reed switch
replacement in low duty cycle applications
www.DataSheet.net/
General Description:
The SS259 Omnipolar Hall effect sensor IC is fabricated from mixed signal CMOS technology. It incorporates
advanced chopper-stabilization techniques to provide accurate and stable magnetic switch points.
The circuit design provides an internally controlled clocking mechanism to cycle power to the Hall element and
analog signal processing circuits. This serves to place the high current-consuming portions of the circuit into a
“Sleep” mode. Periodically the device is “Awakened” by this internal logic and the magnetic flux from the Hall
element is evaluated against the predefined thresholds. If the flux density is above or below the BOP/BRP thresholds
then the output transistor is driven to change states accordingly. While in the “Sleep” cycle the output transistor is
latched in its previous state. The design has been optimized for service in applications requiring extended operating
lifetime in battery powered systems.
The output transistor of the SS259 will be latched on (BOP) in the presence of a sufficiently strong South or North
magnetic field facing the marked side of the package. The output will be latched off (BRP) in the absence of a
magnetic field.
1 V2.10 May 1, 2012
Datasheet pdf - http://www.DataSheet4U.co.kr/
SS259
CMOS Omnipolar High Sensitivity Micropower Hall Switch
Typical Application Circuit
SEC's pole-independent sensing technique allows for operation with either a north pole or south pole magnet
orientation, enhancing the manufacturability of the device. The state-of-the-art technology provides the same output
polarity for either pole face.
It is strongly recommended that an external bypass be connected (in close proximity to the Hall sensor) between the
supply and ground of the device to reduce both external noise and noise generated by the chopper-stabilization
technique. This is especially true due to the relatively high impedance of battery supplies.
Internal Timing Circuit
Current
Iaw
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Period
Sample & Output
Latched
Iav
Isp
Awake Taw: 175μs
0
Sleep Tsl: 70ms
Time
2 V2.10 May 1, 2012
Datasheet pdf - http://www.DataSheet4U.co.kr/
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국내 전력반도체 판매점
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