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High-Performance Power ICs and Hall-Effect Sensors
Related Links:
Datasheets:
3141 thru 3144: Sensitive Hall-Effect Switches, High-Temperature (PDF)
Selection Guides:
Hall-Effect Sensors,
Unipolar Hall-Effect Digital Switches
Technical Publications:
A110x Family Provides Advanced Drop-In Replacements for A314x and A312x Devices (PDF),
Hall Sensor High-Voltage Testing
Press Releases:
A1101/02/03/04/06: Allegro MicroSystems, Inc. Replaces Unipolar Switch Family for Improved Performace and Additional Packaging Options,
Hall-Effect Switch Circuits for High-Temperature Operation
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A3141, A3142, A3143, A3144
Sensitive Hall-Effect Switches, High-Temperature
The A3141, A3142, A3143, and A3144 have been phased out of production as of October 31, 2005, and has been replaced by the A1101, A1102, A1103, and A1104 next-generation continuous-time unipolar switches.
For samples and information on the replacement part, please refer to the A110x family.
Replacement Device Characteristics Table
| Device | A110x Characteristics | ||||||
|---|---|---|---|---|---|---|---|
| BOP | BRP | Hys | |||||
| Legacy | Replacement | Min | Max | Min | Max | Min | Max |
| A3141 | A1101 | 30 | 175 | 10 | 145 | 20 | 80 |
| A3142 | A1102 | 115 | 245 | 60 | 190 | 30 | 80 |
| A3143 | A1103 | 205 | 355 | 150 | 300 | 30 | 80 |
| A3144 | A1104 | 35 | 450 | 25 | 430 | 20 | - |
| A3121 | A1106 | 260 | 430 | 160 | 330 | 70 | 140 |
Features
- Superior Temp. Stability for Automotive or Industrial Applications
- 4.5 V to 24 V Operation ... Needs Only An Unregulated Supply
- Open-Collector 25 mA Output ... Compatible with Digital Logic
- Reverse Battery Protection
- Activate with Small, Commercially Available Permanent Magnets
- Solid-State Reliability
- Small Size
- Resistant to Physical Stress
Description
These Hall-effect switches are monolithic integrated circuits with tighter magnetic specifications, designed to operate continuously over extended temperatures to +150°C, and are more stable with both temperature and supply voltage changes. The unipolar switching characteristic makes these devices ideal for use with a simple bar or rod magnet. The four basic devices (3141, 3142, 3143, and 3144) are identical except for magnetic switch points.
Each device includes a voltage regulator for operation with supply voltages of 4.5 to 24 volts, reverse-battery protection diode, quadratic Hall-voltage generator, temperature compensation circuitry, small- signal amplifier, Schmitt trigger, and an open-collector output to sink up to 25 mA. With suitable output pull up, they can be used with bipolar or CMOS logic circuits. The A3141- and A3142- are improved replacements for the UGN/UGS3140-; the A3144- is the improved replacement for the UGN/UGS3120-.
Functional Block Diagram
| Part Number | Package Type | RoHS Compliant |
Part Composition/ RoHS Data |
Temperature | Comments | Samples | Distributor Stock |
|---|---|---|---|---|---|---|---|
| A3141ELT | 3-lead SOT | No | view data | -40 °C to 85 °C | discontinued | samples not available | |
| A3141ELTTR | 3-lead SOT | No | view data | -40 °C to 85 °C | discontinued | samples not available | |
| A3141EUA | 3-pin SIP | No | view data | -40 °C to 85 °C | discontinued | samples not available | |
| A3141LLT | 3-lead SOT | No | view data | -40 °C to 150 °C | discontinued | samples not available | |
| A3141LLTTR | 3-lead SOT | No | view data | -40 °C to 150 °C | discontinued | samples not available | |
| A3141LUA | 3-pin SIP | No | view data | -40 °C to 150 °C | discontinued | samples not available | |
| A3142ELT | 3-lead SOT | No | view data | -40 °C to 85 °C | discontinued | samples not available | |
| A3142ELTTR | 3-lead SOT | No | view data | -40 °C to 85 °C | discontinued | samples not available | |
| A3142EUA | 3-pin SIP | No | view data | -40 °C to 85 °C | discontinued | samples not available | |
| A3142LLT | 3-lead SOT | No | view data | -40 °C to 150 °C | discontinued | samples not available | |
| A3142LLTTR | 3-lead SOT | No | view data | -40 °C to 150 °C | discontinued | samples not available | |
| A3142LUA | 3-pin SIP | No | view data | -40 °C to 150 °C | discontinued | samples not available | |
| A3143ELT | 3-lead SOT | No | view data | -40 °C to 85 °C | discontinued | samples not available | |
| A3143ELTTR | 3-lead SOT | No | view data | -40 °C to 85 °C | discontinued | samples not available | |
| A3143EUA | 3-pin SIP | No | view data | -40 °C to 85 °C | discontinued | samples not available | |
| A3143LLT | 3-lead SOT | No | view data | -40 °C to 150 °C | discontinued | samples not available | |
| A3143LLTTR | 3-lead SOT | No | view data | -40 °C to 150 °C | discontinued | samples not available | |
| A3143LUA | 3-pin SIP | No | view data | -40 °C to 150 °C | discontinued | samples not available | |
| A3144ELT | 3-lead SOT | No | view data | -40 °C to 85 °C | discontinued | samples not available | |
| A3144ELTTR | 3-lead SOT | No | view data | -40 °C to 85 °C | discontinued | samples not available | |
| A3144EUA | 3-pin SIP | No | view data | -40 °C to 85 °C | discontinued | samples not available | |
| A3144LLT | 3-lead SOT | No | view data | -40 °C to 150 °C | discontinued | samples not available | |
| A3144LLTTR | 3-lead SOT | No | view data | -40 °C to 150 °C | discontinued | samples not available | |
| A3144LUA | 3-pin SIP | No | view data | -40 °C to 150 °C | discontinued | samples not available |
Allegro's products are not to be used in life support devices or systems, if a failure of an Allegro product can reasonably be expected to cause the failure of that life support device or system, or to affect the safety or effectiveness of that device or system.