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Melexis Technologies NV US2881LSE-AAA-000-RE
- Part No.:
- US2881LSE-AAA-000-RE
- Manufacturer:
- Melexis Technologies NV
- Category:
- Switches (Solid State)
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
US2881LSE-AAA-000-RE.pdf
- Description:
- MAGNETIC SWITCH LATCH TSOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:45,362
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Product details
Overview
US2881LSE-AAA-000-RE from Melexis is a bipolar Hall-effect switch in TSOT-23L package, designed for high-sensitivity magnetic detection with ±4.5 mT operating/release points, 3.5–24 V supply range, and open-drain output. It enables solid-state switching in BLDC motor commutation, angular position sensing, and automotive proximity detection under harsh thermal conditions (−40°C to +150°C).
For engineers reviewing the US2881LSE-AAA-000-RE datasheet, pinout, applications, or equivalent options, key selection criteria include bipolar latching behavior, chopper-stabilized offset cancellation, RoHS-compliant TSOT-23L packaging, and validated performance across automotive temperature ranges.
Technical Context
The US2881LSE-AAA-000-RE integrates a Hall sensor, chopper-stabilized amplifier, Schmitt trigger, and open-drain driver in mixed-signal CMOS. Its dynamic offset cancellation enables stable operation with weak magnets or large air gaps, while symmetric BOP/BRP (±0.5–±4.5 mT) supports true bipolar latching behavior.
This device operates as a magnetic memory: output retains state after field removal, with hysteresis (1.5–6 mT) preventing oscillation near thresholds. It supports both three-wire and two-wire configurations, and its 2.6 mA typical supply current at 25°C enables low-power embedded sensing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.5 V to 24 V - supports direct connection to automotive battery rails and industrial 24 V systems without external regulation. |
| Operating Temperature | −40°C to +150°C - qualified for under-hood automotive use and high-temp industrial environments. |
| Magnetic BOP / BRP | ±0.5 mT to ±4.5 mT (typ) - enables reliable switching with low-strength magnets or >1 mm air gaps. |
| Output Type | Open-drain - allows flexible pull-up to any logic voltage (e.g., 3.3 V or 5 V) and wired-OR interfacing. |
| Supply Current | 2.6 mA (typ) at 25°C - reduces system power budget in always-on sensing applications. |
| Output Saturation Voltage | 0.5 V max at 20 mA - ensures clean low-state signaling into standard logic inputs or MOSFET gates. |
| Hysteresis | 1.5–6 mT - prevents chatter during slow or noisy magnetic transitions, critical for speed and position accuracy. |
Pinout & Package
US2881LSE-AAA-000-RE uses the TSOT-23L (Melexis package code "SE") - a thin, RoHS-compliant surface-mount package with 0.95 mm height and 2.9 mm × 1.6 mm footprint. Sensitive spot located 0.275 mm below top surface, centered between pins 1 and 2.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD | Supply input - accepts 3.5–24 V; requires local 100 nF bypass capacitor to GND for noise immunity. |
| 2 | OUT | Open-drain output - sinks up to 50 mA; requires external pull-up resistor for logic-level signaling. |
| 3 | GND | Ground reference - must be low-impedance return path; shared with bypass capacitor and pull-up resistor. |
Key Features
| Feature | Design Value |
|---|---|
| Bipolar latching operation | Outputs retain state after magnetic field removal - enables non-volatile position memory without microcontroller polling. |
| Chopper-stabilized amplifier | Eliminates inherent Hall sensor offset drift - ensures stable BOP/BRP over temperature and lifetime, reducing calibration overhead. |
| Wide supply range (3.5–24 V) | Direct compatibility with 12 V automotive systems and 24 V industrial PLCs - eliminates need for external LDO or DC-DC converter. |
| RoHS-compliant TSOT-23L | 0.95 mm profile enables compact PCB layouts in space-constrained modules like motor control boards and brake sensors. |
| Low 2.6 mA supply current | Extends battery life in portable tools and enables thermally constrained designs - junction temp rise limited to <10°C at 25°C ambient. |
Applications
| BLDC Motor Commutation | Automotive Wheel Speed Sensing |
|---|---|
|
Use Scenario: Detect rotor magnet polarity to sequence phase currents in 3-phase brushless DC motors. IC Role / Device Role / Timing Role: Bipolar latching Hall switch providing precise, jitter-free commutation edges synchronized to magnet passage. Use Value: Enables efficient, sensor-based motor control with <1° electrical angle timing resolution and immunity to EMI in motor drive environments. |
Use Scenario: Monitor toothed wheel rotation on ABS or traction control systems. IC Role / Device Role / Timing Role: Magnetic proximity detector generating clean digital pulses per wheel tooth for speed and direction calculation. Use Value: Delivers consistent pulse timing across −40°C to +150°C with no false triggers from vibration or thermal drift. |
| Angular Position Detection | Industrial Proximity Switch |
|
Use Scenario: Measure rotational angle of shaft-mounted diametrically magnetized ring magnets. IC Role / Device Role / Timing Role: High-sensitivity bipolar switch detecting north/south pole transitions to infer absolute angular position via counting. Use Value: Supports sub-degree resolution with standard ferrite magnets and >0.8 mm air gap - eliminates need for expensive multi-pole encoders. |
Use Scenario: Replace mechanical limit switches in CNC machines, packaging equipment, and valve position feedback. IC Role / Device Role / Timing Role: Solid-state proximity detector triggering on ferrous target approach without physical contact. Use Value: Achieves >10M cycle reliability, immune to dust/moisture, and operates reliably with 24 V industrial supplies and noisy ground returns. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bipolar Hall switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Allegro A1120EUA-T | Wider BOP/BRP spread (±5.5 mT), higher 5.5 mA supply current, TO-92 only - no TSOT option. | Limited to through-hole assembly; less suitable for high-density motor control PCBs requiring surface mount. | Choose when legacy TO-92 layout exists and higher magnetic sensitivity margin is required. |
| Diodes Inc. AH9223G-GU-AB | Unipolar operation only (south-pole active), 3.3–26 V supply, 3.5 mA typical IDD - lacks bipolar latching. | Cannot retain state after field removal; unsuitable for angular position memory or latch-based commutation. | Choose only for simple presence detection where unipolar response suffices and cost is primary constraint. |
Compared with A1120EUA-T and AH9223G-GU-AB, US2881LSE-AAA-000-RE uniquely combines TSOT-23L surface-mount compatibility, true bipolar latching, and automotive-grade temperature range - enabling compact, robust, and memory-capable magnetic sensing in next-gen motor and vehicle systems.
Availability
US2881LSE-AAA-000-RE is available at Aetrix Electronics and suitable for automotive wheel speed sensing, BLDC motor commutation, angular position detection, and industrial proximity switching requiring stable component supply across extended temperature and voltage ranges.
Supply support for US2881LSE-AAA-000-RE includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Melexis is a Belgian semiconductor company specializing in intelligent sensors and driver ICs for automotive, industrial, and consumer markets, with IATF 16949 and ISO 14001 certification.
The US2881LSE-AAA-000-RE belongs to Melexis' high-sensitivity bipolar Hall switch product line, engineered specifically for robust, low-power magnetic position and speed sensing in demanding automotive and industrial environments.
FAQ
What is the operating temperature range of the US2881LSE-AAA-000-RE?
The US2881LSE-AAA-000-RE is rated for −40°C to +150°C continuous operation, matching the "L" temperature suffix in its part number. This specification is validated per Melexis datasheet revision 017 (March 2025) and qualifies the device for under-hood automotive applications such as engine camshaft or transmission speed sensing where ambient temperatures exceed 125°C.
Does the US2881LSE-AAA-000-RE support latching behavior, and how does it differ from unipolar Hall switches?
Yes, the US2881LSE-AAA-000-RE exhibits true bipolar latching behavior: its output remains in the last state after magnetic field removal, toggling only upon detection of opposite-polarity fields. Unlike unipolar switches (e.g., AH9223G-GU-AB), which reset to high impedance when the field vanishes, US2881LSE-AAA-000-RE maintains magnetic memory - essential for angular position tracking and commutation sequencing without continuous polling.
What package type does the US2881LSE-AAA-000-RE use, and what are its key mechanical dimensions?
The US2881LSE-AAA-000-RE uses the TSOT-23L (Thin Small Outline Transistor, 3-lead) package - Melexis package code "SE". Its footprint measures 2.9 mm × 1.6 mm with 0.95 mm maximum height. Pin 1 (VDD) and pin 2 (OUT) are spaced 0.95 mm apart; the sensitive Hall element lies 0.275 mm below the top surface, centered between these pins per datasheet section 16.1.2.
Can the US2881LSE-AAA-000-RE operate directly from a 24 V industrial supply without external regulation?
Yes, the US2881LSE-AAA-000-RE supports 3.5 V to 24 V supply voltage per its absolute maximum rating (28 V) and electrical specifications. At 24 V, typical supply current remains 2.6 mA, and output saturation voltage stays ≤0.5 V at 20 mA sink - confirming full functionality across the entire 24 V rail without external regulators or Zener clamps, provided a 100 nF bypass capacitor is placed at the VDD pin.
What is the magnetic sensitivity specification of the US2881LSE-AAA-000-RE, and how is it defined?
The US2881LSE-AAA-000-RE has a typical operating point (BOP) of ±4.5 mT and release point (BRP) of ∓4.5 mT at 25°C, with guaranteed minimums of ±0.5 mT. These values define the magnetic flux density at which the output switches ON/OFF when applied to the branded side of the package. Sensitivity is confirmed across temperature (−40°C to +150°C) and supply voltage (3.5–24 V), enabling reliable detection with low-strength magnets or large air gaps.
US2881LSE-AAA-000-RE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Melexis Technologies NV
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Latch
- Technology:
- Hall Effect
- Polarization:
- South Pole
- Sensing Range:
- 4.5mT Trip, -4.5mT Release
- Test Condition:
- 25°C
- Voltage - Supply:
- 3.5V ~ 24V
- Current - Supply (Max):
- 5mA
- Current - Output (Max):
- 50mA
- Output Type:
- Open Drain
- Features:
- -
- Operating Temperature:
- -40°C ~ 150°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-3
US2881LSE-AAA-000-RE FAQ
1.How can I place an order for US2881LSE-AAA-000-RE through Aetrix?
Please submit a Request for Quotation (RFQ) for US2881LSE-AAA-000-RE on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for US2881LSE-AAA-000-RE reliable?
The price and inventory of US2881LSE-AAA-000-RE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for US2881LSE-AAA-000-RE is usually 5 days.
3.What payment methods are accepted for US2881LSE-AAA-000-RE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for US2881LSE-AAA-000-RE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for US2881LSE-AAA-000-RE?
US2881LSE-AAA-000-RE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your US2881LSE-AAA-000-RE order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for US2881LSE-AAA-000-RE?
For technical support, including US2881LSE-AAA-000-RE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your US2881LSE-AAA-000-RE requirements.
6.How does Aetrix verify that US2881LSE-AAA-000-RE is sourced from the original manufacturer or authorized distributors?
All US2881LSE-AAA-000-RE products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that US2881LSE-AAA-000-RE meets industry standards.
7.What is the process for return or replacement of US2881LSE-AAA-000-RE?
All US2881LSE-AAA-000-RE units undergo pre-shipment inspection (PSI). If there is an issue with US2881LSE-AAA-000-RE, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The US2881LSE-AAA-000-RE part is unused and in its original packaging.
Return procedure for US2881LSE-AAA-000-RE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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