SL353LT
High-Stability, Low-Power
- Brand： HONEYWELL
- Size/Package： SOT-23-3
- Parameter： 20-110Gs
- Voltage： 2.2-5.5V
- Release Point： 5-95Gs
- Operating Temp： -40℃~+85℃
- Parameters
- Brand： HONEYWELL
- Size/Package： SOT-23-3
- Parameter： 20-110Gs
- Voltage： 2.2-5.5V
- Release Point： 5-95Gs
- Operating Temp： -40℃~+85℃
The Honeywell SL353LT is a digital omnipolar Hall-effect sensor IC designed for battery-powered applications where extending operational life is critical. Built with BiCMOS technology and an ultra-low duty cycle timing circuit, it achieves an industry-leading 1.8 µA typical current consumption at 2.8V — enabling years of continuous operation from a single coin cell battery.
Unlike conventional Hall sensors that require specific magnet polarity and external pull-up resistors, the SL353LT integrates omnipolar sensing (responds to both North and South poles) and push-pull output (no external pull-up needed) in a subminiature SOT-23 package. This combination eliminates two common sources of production cost and design complexity — making the SL353LT a true 'drop-in-and-forget' solution for high-volume, space-constrained, battery-powered products.
Three Critical Design Pain Points — Solved by SL353LT
⚡ Pain Point 1: High Standby Power Consumption Shortens Battery Life
In consumer wearables, smart water meters, medical monitors, and wireless IoT sensors, the Hall sensor's standby current often dominates the power budget. Conventional solutions draw 0.3–3 mA continuously, forcing designers to use larger batteries, schedule frequent maintenance, or compromise on features.
🔧 Pain Point 2: Magnet Polarity Dependency Increases Assembly Cost & Defect Rate
Traditional Hall-effect sensors require the magnet to present a specific pole (North or South) toward the sensor. On high-volume production lines, this adds a manual verification step — workers must check magnet orientation, or expensive polarity-checking fixtures are needed. A reversed magnet means a non-functional unit, triggering rework, scrap, or field returns.
📐 Pain Point 3: Limited PCB Space & Excessive BOM Components Drive Up Cost
Space-constrained designs — TWS earbud charging cases, stylus pens, compact IoT modules, wearable medical patches — have little room for external components. Most Hall sensors with open-drain outputs require an external pull-up resistor, adding a BOM line item, a placement operation, and a potential solder defect point.
SL353 Series Comparison
| Parameter | SL353LT | SL353HT |
|---|---|---|
| Duty Cycle (Typ.) | 0.013% | 13% |
| Current Consumption (Typ.) | 1.8 µA | 0.33 mA |
| Best For | Battery-powered, always-on, low-switching-speed applications | High-speed switching where current is less constrained |
| Typical Applications | Door/window sensors, water meters, tamper detection, medical wearables | Motor commutation, RPM sensing, fast position detection |
Selection rule of thumb: If your application checks the magnet state less than a few times per second and runs on a battery → choose SL353LT. If you need to track fast-changing magnetic fields (e.g., rotating shaft with multiple pole pairs) → choose SL353HT.
Key Features
- Ultra-Low Power Consumption: 1.8 µA typ. @ 2.8V (0.013% duty cycle) — orders of magnitude lower than conventional Hall sensors
- Omnipolar Magnetic Sensing: Responds to either North or South pole — no magnet polarity identification required, simplifying installation and reducing system cost
- Push-Pull Output: No external pull-up resistor needed — reduces BOM count, saves PCB space, and minimizes total current consumption
- Wide Supply Voltage Range: 2.2 V to 5.5 V — compatible with low-voltage battery systems and standard MCU I/O levels
- BiCMOS Technology: Bipolar Complementary Metal Oxide Semiconductor process with integrated timing circuit for extreme power efficiency
- SOT-23 Subminiature Package: 2.9 × 1.6 mm surface-mount — ideal for space-constrained designs, supplied on tape and reel (3,000 units/reel)
- Typical Operate Point: ±60 Gauss at 25°C — consistent, repeatable magnetic switching
- Operating Temperature Range: -40°C to +85°C — suitable for outdoor and industrial environments
Target Applications
| Application Field | Typical Use Cases |
|---|---|
| Smart Home & IoT | Door/window open-close sensors, smart locks, tamper detection, presence/absence detection |
| Medical Devices | Wearable health monitors, infusion pump door sensors, pill dispenser lid detection, portable diagnostic tools |
| Utility & Metering | Smart water meters, gas meters, flow sensors with tamper monitoring — long-deployment, hard-to-access installations |
| Consumer Electronics | TWS earbud charging case lid detection, stylus pens, tablet cover sensors, game controller triggers |
| Industrial | Pneumatic cylinder end-of-stroke detection, limit switches, safety interlock monitoring, valve position feedback |
About Honeywell
Honeywell International Inc. is a Fortune 100 technology company and a global leader in sensing and productivity solutions. With decades of innovation in magnetic sensing technology, Honeywell's Hall-effect sensor portfolio is trusted by engineers worldwide for applications ranging from consumer electronics to aerospace. The SL353 series continues this legacy — delivering precision, reliability, and energy efficiency in a miniature footprint.
Copy product links
Long by picture save/share
Copyright By © YQM ELECTRONICS INTL LIMITED SITEMAP
Email: sales@yqmec.com
