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The A3141, A3142, A3143, and A3144 have been phased out of production as of October 31, 2005, and has been replaced by the A1101, A1102, A1103, and A1104 next-generation continuous-time unipolar switches.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

  Complete Part Numbers

Part Number	Package Type	Temperature	Comments
A3141ELT	3-lead SOT	-40 °C to  85 °C	discontinued
A3141ELTTR	3-lead SOT	-40 °C to  85 °C	discontinued
A3141EUA	3-pin SIP	-40 °C to  85 °C	discontinued
A3141LLT	3-lead SOT	-40 °C to  150 °C	discontinued
A3141LLTTR	3-lead SOT	-40 °C to  150 °C	discontinued
A3141LUA	3-pin SIP	-40 °C to  150 °C	discontinued
A3142ELT	3-lead SOT	-40 °C to  85 °C	discontinued
A3142ELTTR	3-lead SOT	-40 °C to  85 °C	discontinued
A3142EUA	3-pin SIP	-40 °C to  85 °C	discontinued
A3142LLT	3-lead SOT	-40 °C to  150 °C	discontinued
A3142LLTTR	3-lead SOT	-40 °C to  150 °C	discontinued
A3142LUA	3-pin SIP	-40 °C to  150 °C	discontinued
A3143ELT	3-lead SOT	-40 °C to  85 °C	discontinued
A3143ELTTR	3-lead SOT	-40 °C to  85 °C	discontinued
A3143EUA	3-pin SIP	-40 °C to  85 °C	discontinued
A3143LLT	3-lead SOT	-40 °C to  150 °C	discontinued
A3143LLTTR	3-lead SOT	-40 °C to  150 °C	discontinued
A3143LUA	3-pin SIP	-40 °C to  150 °C	discontinued
A3144ELT	3-lead SOT	-40 °C to  85 °C	discontinued
A3144ELTTR	3-lead SOT	-40 °C to  85 °C	discontinued
A3144EUA	3-pin SIP	-40 °C to  85 °C	discontinued
A3144LLT	3-lead SOT	-40 °C to  150 °C	discontinued
A3144LLTTR	3-lead SOT	-40 °C to  150 °C	discontinued
A3144LUA	3-pin SIP	-40 °C to  150 °C	discontinued

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