JYM27121 High-Sensitivity Bipolar Latch Hall-Effect Switch Sensor | Wide Voltage 2.8-24V Industrial-Grade Hall Sensor Chip
JYM27121 is a 3-wire voltage-mode bipolar latch Hall-effect switch sensor designed with 0.18μm BCDMOS technology, featuring magnetic sensitivity Bop=18Gs, Brp=-18Gs. It offers wide voltage operation, high-temperature endurance, high ESD protection, and multiple built-in safeguards. Optimized for industrial motor commutation, speed detection, and position sensing, it provides stable drop-in replacement for mainstream Hall devices with superior cost-performance and reliability.
Key Product Advantages
Built on advanced 0.18μm BCDMOS process for excellent parameter consistency. Wide operating voltage range of 2.8V~24V with friendly low-voltage start-up. Typical supply current of 1.8mA for low power consumption. Integrated magnetic switch point temperature compensation ensures stable performance across full temperature range. ESD protection of ±8kV, plus over-temperature protection, reverse power protection, and output current limiting for robust industrial operation. Magnetic switching points are minimally affected by supply voltage for high detection accuracy. Available in TO-92S and SOT23-3L packages, RoHS compliant.
Key Parameter Table
| Parameter | Symbol | Typical Value | Unit |
| Operating Voltage | VCC | 2.8~24 | V |
| Supply Current | ICC | 1.8 | mA |
| Operate Point | Bop | 18 | Gs |
| Release Point | Brp | -18 | Gs |
| ESD(HBM) | VESD | ±8 | kV |
| Junction Temperature | TJ | -40~150 | ℃ |
Pin Definition
| Pin Name | TO-92S(UA) | SOT23-3L(SO) | Description |
| VCC | 1 | 1 | Power Supply 2.8~24V |
| GND | 2 | 3 | Ground |
| OUT | 3 | 2 | NMOS Open Drain, External Pull-up Resistor Required |
Internal Block Diagram
Typical Application Circuit
Typical Application Circuit 1: Recommended external pull-up resistor RL at OUT pin is 1kΩ~10kΩ, CP=10nF, CL=4.7nF. Typical Application Circuit 2: For noisy power supply environments, a 100Ω resistor in series at the power input and filter capacitors placed close to the chip improve anti-interference performance.
Package Information & Dimensional Drawing
TO-92S(UA): 1000 pcs/bag, through-hole package, suitable for manual soldering and wave soldering. SOT23-3L(SO): 3000 pcs/reel, surface-mount package, suitable for automated SMT assembly. Package dimensions in mm; both TO-92S and SOT23-3L are standard 3-pin packages compatible with mainstream PCB designs.
Ordering Information
| Part Number | Package | Packing Quantity | Junction Temp. Range |
| JYM27121UA | TO-92S | 1000 pcs/bag | -40~150℃ |
| JYM27121SO | SOT23-3L | 3000 pcs/reel | -40~150℃ |
Applications
3-Phase BLDC Motor Commutation Control. Power Tool Drive & Protection. Flow Sensor Signal Acquisition. Tachometer & Speed Detection. Proximity Detection, Linear Position Sensing, Angular Position Sensing. Industrial Solid-State Switches & Position Sensing Modules.
Compatible Replacement & Advantage Comparison
Direct drop-in replacement for mainstream bipolar latch Hall devices: A1203, AH3242, SH1881, ES1226, TLE4961, etc.
JYM27121 Advantages: Operating voltage down to 2.8V covers more low-voltage applications. Junction temperature range -40~150℃, higher than standard 125℃ devices for better high-temperature stability. Symmetrical magnetic sensitivity Bop=18Gs, Brp=-18Gs for precise latching. Integrated over-temperature, reverse polarity, and current limiting protections enhance long-term reliability. Stable domestic original supply with superior cost-performance and reliable lead times.
Keywords
JYM27121, bipolar latch Hall switch, high-sensitivity Hall sensor, 18Gs Hall chip, wide voltage Hall sensor, 2.8-24V Hall, industrial-grade Hall, BLDC motor Hall, speed detection Hall, TO-92S Hall, SOT23-3L Hall, domestic Hall chip
