The HCPL-3700 voltage/current threshold detection optocoupler consists of an AlGaAs LED connected to a threshold sensing input buffer IC which are optically coupled to a high gain darlington output. The input buffer chip is capable of controlling threshold levels over a wide range of input voltages with a single resistor. The output is TTL and CMOS compatible.
Features:-
• AC or DC input
• Programmable sense voltage
• Logic level compatibility
• Threshold guaranteed over temperature (0°C to 70°C)
• Optoplanar™ construction for high common mode immunity
• UL recognized (file # E90700)
• VDE certified – ordering option ‘V’, e.g., HCPL3700V
Applications:-
• Low voltage detection
• 5 V to 240 V AC/DC voltage sensing
• Relay contact monitor
• Current sensing
• Microprocessor Interface
• Industrial controls
Specification:-
| Symbol | Parameter | Value | Unit |
| TOPR |  Operating temperature | -40 to +85 | °C |
| VIN | Input Voltage | -0.5 (Max.) | V |
| PO | Output Power dissipation | 210 (Max.) | mW |
| Vo | Output Voltage | -0.5 to 20 | V |
| TSTG | Storage temperature range | – 55 to + 150 | °C |
| TSOL | Lead Solder Temperature | 260 for 10 sec | °C |
| Vcc | Supply Voltage | -0.5 to 20 | V |
| Io | Output Current | 30 (Max.) | mA |
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