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Edwina Chase
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1 Distributed by: The content and copyrights of the attached material are the property of its owner.

2 Features - 3.5V to 20V DC operation voltage - Temperature compensation - Wide operating voltage range - Open-Collector pre-driver - 25mA maximum sinking output current. - Reverse Polarity Protection Applications - VCD/DVD loader, CD/DVD ROM - Cover detector - Speed measurement - Home appliances - Home safety General Description is an switched Hall-Effect IC which is for contactless switching applications. The device includes an on-chip Hall voltage generator for magnetic sensing, an amplifier that amplifies the Hall voltage, a schmitt trigger to provide switching hysteresis for noise rejection, and an open-collector output. The bandgap regulator allows a wide operating voltage range. is rated for operating temperature range from -20 C to 85 C and voltage range from 3.5V to 20V. Ordering Information X -XX X - X Single Hall-effect Switch Wafer Body Package Lead Packing Magnetic Characteristics Blank or A~Z : if necessary to specify P: SIP3 W: SOT23 L : Lead Free Blank: Normal Blank : Tube or Bulk A : Tape & Reel A or B Typical Circuit 3.5V ~20V R L ATS 137 DO Digital Output Vss This datasheet contains new product information. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sale of the product. Rev.A5 Jul 14, /7

3 Functional Block Diagrams 1 Regulator Hall plate Amp 3 2 DO Vss Pin Descriptions Top view 1 : 2 : Vss 3 : DO Name P/I/O Pin # Description P 1 Positive Power Supply Vss P 2 Ground DO O 3 Digital Output 2/7

4 Absolute Maximum Ratings ( at Ta=25 o C ) Characteristics Symbol Values Unit Supply voltage V CC 20 V Reverse Polarity Voltage V RCC -20 V Magnetic flux density B Unlimited Output OFF Voltage Vce 30 V Output on current Continuous Ic 25 ma Operating temperature Ta -20~+85 C Storage temperature Ts -65~+150 C Maximum Junction Temp. Tj 175 C Package Power SIP-3L 400 mw Pd Dissipation SOT23-3L 200 mw Electrical Characteristics (Ta=+ 25 C) Characteristic Symbol Test Conditions Min Typ Max Units Supply voltage V Output saturation voltage Vce(sat) =14V, Ic=20mA mv Output leakage current Icex Vce=14V, =14V - < ua Supply current Icc =20V, Output Open ma Output rise time tr =14V, RL=820Ω, CL=20pF us Output falling time tf =14V, RL=820Ω, CL=20pF us Test Circuit 14V DO RL RL=820 Ohm CL=20 pf CL Test Circuit 3/7

5 Magnetic Characteristics (Ta=25 o C) (1mT=10Gauss) A grade Parameter Symbol Min. Typ. Max. Unit Operate Point Bop Gauss Release point Brp Gauss Hysteresis Bhys Gauss B grade Parameter Symbol Min. Typ. Max. Unit Operate Point Bop Gauss Release point Brp Gauss Hysteresis Bhys Gauss Application Information -Operating principle is a three pins Hall Effect switch IC which can turn magnetic flux variety to digital output signal. In other words, it is an interface from magnetic system to electrical one by Hall effect. The illustrations are shown in Fig.1. Vo Turn off B hys Turn on Magnet S Marking side Vce(sat) B rp B op magnetic flux (Gauss) electrical Fig.1 Hall-effect switch Output driver is open-collector topology and maximum sink current (I sink ) is 25mA. The illustrated circuit is shown as Fig V ~20V R L ATS 137S Vss DO I sink Vo Digital Output Fig.2 Application circuit 4/7

6 Application Information (Continued) Vo will turn on(low) if the S magnetic flux larger than operation point (Bop), and turns off whenever the magnetic flux is removed and lower than release point (Brp). The related waveforms are shown in Fig.3. magnetic flux (mt) Bop S Marking side Brp Vo t Hall Effect switch Vce(sat) t Fig.3 Vo and magnetic flux variety The major applications are for contactless switching and shown as follows: - VCD/DVD loader, CD/DVD ROM: Detect if the tray is opened or closed - Cover detector (open/close): Cellular phone cover detector, Refrigerator door detector, Microwave oven door sensor etc - Home safety: instead of reed relay to detect the situation of door/window. - Due to contactless and without mechanical contact point, its reliability and life cycle are much longer than reed relay. In addition, its switching speed is much faster than mechanical devices. 5/7

7 Marking Information (1) SOT23 (2) SIP3 (Top View) XX YM X ID code A~Z: Non-Lead Free a~z: Lead Free JA: Date code Y : Year M : Month (A~L) (Top View) 137 YWW X ID code A~Z: Non-Lead Free a~z : Lead Free Date code Y : Year WW : Nth week Package Information (1)Package Type: SIP-3L 0.51mm NOM 2.10mm 1.55mm BRANDED SURFACE Active Area Depth Sensor Location Package Dimension 45º 0.38mm 0.7mm 1.57mm 1.47mm 0.41mm 0.41mm 4.17mm 4.04mm mm 45º 3.10mm 2.97mm 1.82 mm 15.50mm 13.00mm 6/7

8 Package Information (Continued) (2)Package Type: SOT23-3L D 2 ( Sensing point ) E HE 0.8mm mm e1 SEE VIEW C e c1(4x) 0.10 C 3X A2 A GAUGE PLANE SEATING PLANE b(3x) c2(4x) A1 VIEW C L L1 c Symbol Dimensions In Millimeters Dimensions In Inches Min. Nom. Max. Min. Nom. Max. A A A b C D E HE L L e e θ 0 o 5 o 10 o 0 o 5 o 10 o θ1 3 o 5 o 7 o 3 o 5 o 7 o θ2 6 o 8 o 10 o 6 o 8 o 10 o 7/7

ATS137. General Description. Features. Applications. Typical Application Circuit 3.5V ~20V ATS137 SINGLE HALL EFFECT SWITCH. V cc. Digital Output GND

ATS137. General Description. Features. Applications. Typical Application Circuit 3.5V ~20V ATS137 SINGLE HALL EFFECT SWITCH. V cc. Digital Output GND Features General Description 3.5V to 20V DC Operation Voltage Temperature Compensation Wide Operating Voltage Range Open-Collector Pre-Driver 25mA Maximum Sinking Output Current Reverse Polarity Protection