SS345PT/SS445P DESCRIPTION The 2.7 Vdc to 7 Vdc supply voltage range allows this device The SS345PT/SS445P sensors are small, versatile digital Hall- to be used in low voltage applications. The SS345PT’s very effect devices that are operated by the magnetic field from a small size requires less PCB (printed circuit board) space, permanent magnet or an electromagnet, designed to respond allowing it to be used in smaller assemblies. to a single North pole (SS345PT) or South pole (SS445P). These sensors are available in two package styles: the These unipolar sensors are designed to meet the requirements SS345PT in the subminiature SOT-23 surface mount package; of a wide range of potential applications. The internal pull-up the SS445P is available in the leaded, flat TO-92-style resistor often eliminates the need for external components, package. further helping to reduce the system cost. These economical unipolar sensors are well suited for simple, high-volume, cost- The SS345PT is available on tape and reel (3000 units per reel); the SS445P is available in a bulk package (1000 units sensitive position and motion sensing applications. per bag). FEATURES POTENTIAL APPLICATIONS Subminiature package size (SS345PT) uses less space on Commercial: the PCB than standard Hall-effect sensor packages such as Door or lid closure detection in appliances TO-92 or SOT-89, allowing for use in smaller assemblies Speed and RPM sensing in fitness equipment Tape and reel packaging (SS345PT) allows for automated Flow rate sensing in appliances and water softeners component placement, helping to reduce manufacturing Damper or valve position control in HVAC equipment costs Printer head position sensing Small, flat TO-92-style package (SS445P) is also available Industrial Simple activation from a North pole (SS345PT) or a South Flow rate sensing in industrial processes pole (SS445P) makes these products suitable in a variety Robotic control (cylinder position monitoring) of potential applications such as motion control, lid closure Float-based fluid level sensing detection, and displacement sensing Medical Built-in pull-up resistor can easily interface with common Displacement sensor in hospital beds and medical electronic circuits without adding external components, equipment helping to reduce total system cost Medication bin monitor on portable drug carts RoHS-compliant materials meet Directive 2002/95/EC

SS345PT/SS445P Table 1. SS345PT/SS445P Specifications (At 2.7 to 7 Vdc supply, 4 mA load, T = -40 ºC to 150 ºC [-40 ºF to 302 ºF] A Characteristic Condition Minimum Typical Maximum Unit Supply voltage -40 °C to 150 °C [-40 °F to 302 °F] 2.7 5.0 7.0 Vdc Supply current G < 25 , Vs = 5 V, 25 °C [77°F] – 5.5 – mA -40 °C to 150 °C [-40 °F to 302 °F] – – 14 Output current – – – 4.0 mA Vsat G > 260 – – 0.4 Vdc Output leakage current G < 25 – – 10 µA Output rise time – – 1.5 25 °C [77 °F] µs Output fall time – – 1.5 Thermal resistance: SS345PT – – 303 – °C/W SS445P – 233 – Operate -40 °C to 150 °C [-40 °F to 302 °F] 55 180 280 G Release -40 °C to 150 °C [-40 °F to 302 °F] 25 105 240 G Differential -40 °C to 150 °C [-40 °F to 302 °F] 10 75 140 G Operating temperature – -40 [-40] – 150 [302] °C [°F] Storage temperature – -55 [-67] – 165 [329] °C [°F] NOTICE The magnetic field strength required to cause the switch to change state (operate and release) will be as specified in the magnetic characteristics. To test the switch against the specified magnetic characteristics, the switch must be placed in a uniform magnetic field. Table 2. SS345PT/SS445P Absolute Maximum Ratings1 Characteristic Minimum Typical Maximum Unit Supply voltage -0.5 – 7.0 V Applied output voltage -0.5 – 7.0 V Output current – – 8.0 mA Magnetic flux – – no limit G Note 1: Absolute maximum ratings are the extreme limits that the device will withstand without damage to the device. However, the electrical and mechanical characteristics are not guaranteed as the maximum limits (above recommended operating conditions) are approached, nor will the device necessarily operate at absolute maximum ratings. Figure 1. SS345PT/SS445P Current Sinking Output Block Figure 2. Typical SS345PT/SS445P Magnetic Diagram Performance vs Temperature 2 www.honeywell.com/sensing

Figure 3. SS345PT Mounting/Tape and Reel Dimensions (for reference only. mm/[in]) 2,90 [0.114] [00.0,5200] . 3: GROUND (–) 2,80 [0.110] 1,60 [0.063] 1: VCC (+) 2: OUTPUT 0,95 [0.037 1,90 [0.075] S N 1,45 [0.057] 0,60 [0.024] Figure 4. SS445P Mounting Dimensions (for reference only. mm/[in]) Honeywell Sensing and Control 3

Order Guide Catalog Listing Description SS345PT Unipolar, Hall-effect digital position sensor with built-in pull-up resistor, SOT-23 package, tape and reel packaging (3000 units per reel) SS445P Unipolar, Hall-effect digital position sensor with built-in pull-up resistor, flat TO-92 package, bulk packaging (1000 units per bag) WARNING WARNING PERSONAL INJURY MISUSE OF DOCUMENTATION DO NOT USE these products as safety or emergency stop The information presented in this product sheet is for devices or in any other application where failure of the reference only. DO NOT USE this document as a product could result in personal injury. product installation guide. Failure to comply with these instructions could result Complete installation, operation, and maintenance in death or serious injury. information is provided in the instructions supplied with each product. Failure to comply with these instructions could result WARRANTY/REMEDY in death or serious injury. Honeywell warrants goods of its manufacture as being free of defective materials and faulty workmanship. Honeywell’s standard product warranty applies unless agreed to otherwise SALES AND SERVICE by Honeywell in writing; please refer to your order Honeywell serves its customers through a worldwide network acknowledgement or consult your local sales office for specific of sales offices, representatives and distributors. For warranty details. If warranted goods are returned to Honeywell application assistance, current specifications, pricing or name during the period of coverage, Honeywell will repair or replace, of the nearest Authorized Distributor, contact your local sales at its option, without charge those items it finds defective. The office or: foregoing is buyer’s sole remedy and is in lieu of all other warranties, expressed or implied, including those of E-mail: info.sc@honeywell.com merchantability and fitness for a particular purpose. In no event shall Honeywell be liable for consequential, special, Internet: www.honeywell.com/sensing or indirect damages. Phone and Fax: While we provide application assistance personally, through Asia Pacific +65 6355-2828 our literature and the Honeywell web site, it is up to the +65 6445-3033 Fax customer to determine the suitability of the product in the Europe +44 (0) 1698 481481 application. +44 (0) 1698 481676 Fax Latin America +1-305-805-8188 Specifications may change without notice. The information we +1-305-883-8257 Fax supply is believed to be accurate and reliable as of this USA/Canada +1-800-537-6945 printing. However, we assume no responsibility for its use. +1-815-235-6847 +1-815-235-6545 Fax Sensing and Control Honeywell 1985 Douglas Drive North Golden Valley, MN 55422 005921-2-EN November 2011 www.honeywell.com/sensing © 2011 Honeywell International Inc. All rights reserved.

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