Overview
The HCPL2731SDM is a dual-channel optocoupler produced by onsemi, designed for high-performance applications requiring electrical isolation and high-speed data transfer. This component consists of an AlGaAs LED optically coupled to a high gain split darlington photodetector. The split darlington configuration enhances the device's speed and reduces output saturation voltage compared to conventional darlington phototransistor optocouplers. The integrated emitter-base resistor in the dual-channel devices ensures superior stability over temperature variations.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Forward Voltage (VF) | 1.30 | 1.70 | 1.75 | V |
| Input Reverse Breakdown Voltage (BVR) | 5.0 | 19.0 | V | |
| Temperature Coefficient of Forward Voltage | -1.94 | mV/°C | ||
| Logic Low Supply Current (ICCL) | 0.4 | 1.5 | mA | |
| Logic High Supply Current (ICCH) | 0.05 | 10 | µA | |
| Current Transfer Ratio (CTR) | 3500 | 5000 | 11000 | % |
| Propagation Delay Time to Logic LOW (TPHL) | 3 | 25 | 120 | µs |
| Propagation Delay Time to Logic HIGH (TPLH) | 12 | 60 | 90 | µs |
| Input-Input Insulation Leakage Current | 0.005 | µA | ||
| Input-Input Resistance | 10^11 | Ω | ||
| Input-Input Capacitance | 0.03 | pF | ||
| Operating Temperature (TOPR) | -40 | 100 | °C | |
| Storage Temperature (TSTG) | -40 | 125 | °C |
Key Features
- High gain split darlington photodetector for lower output saturation voltage and higher speed operation.
- Integrated emitter-base resistor for superior stability over temperature.
- Low input current of 0.5 mA and high current transfer ratio of up to 2000%.
- Internal noise shield providing exceptional common mode rejection of 10 kV/µs.
- Compatibility with MOS, CMOS, LSTTL, and EIA RS232C interfaces.
- Output compatibility with CMOS and high fan-out TTL requirements.
- Pb-free and RoHS compliant.
- UL and VDE recognized for safety standards.
Applications
- Digital logic ground isolation.
- Telephone ring detectors.
- EIA-RS-232C line receivers.
- High common mode noise line receivers.
- Microprocessor bus isolation.
- Current loop receivers.
Q & A
- What is the HCPL2731SDM optocoupler used for? The HCPL2731SDM is used for applications requiring electrical isolation and high-speed data transfer, such as digital logic ground isolation, telephone ring detectors, and EIA-RS-232C line receivers.
- What is the typical input forward voltage of the HCPL2731SDM? The typical input forward voltage is 1.70 V.
- What is the current transfer ratio (CTR) of the HCPL2731SDM? The CTR can range from 3500% to 11000% depending on the test conditions.
- What are the operating and storage temperature ranges for the HCPL2731SDM? The operating temperature range is -40°C to 100°C, and the storage temperature range is -40°C to 125°C.
- Is the HCPL2731SDM Pb-free and RoHS compliant? Yes, the HCPL2731SDM is Pb-free and RoHS compliant.
- What safety standards does the HCPL2731SDM meet? The HCPL2731SDM meets UL and VDE safety standards.
- What is the common mode transient immunity of the HCPL2731SDM? The common mode transient immunity is up to 10 kV/µs.
- What is the maximum working insulation voltage for the HCPL2731SDM? The maximum working insulation voltage is 1414 Vpeak.
- What is the propagation delay time to logic LOW for the HCPL2731SDM? The propagation delay time to logic LOW can range from 3 µs to 120 µs depending on the test conditions.
- What is the output power dissipation per channel for the HCPL2731SDM? The output power dissipation per channel is 100 mW.
