H11L1 Schmitt Trigger Output Optocoupler IC DIP 6 Package
The H11L1 is a high-performance optocoupler featuring an infrared LED input and a Schmitt-trigger logic output. Unlike standard phototransistor optocouplers, the H11L1 has an integrated high-gain amplifier and Schmitt trigger, providing clean digital output signals, excellent noise immunity, and the ability to handle slow or noisy input signals.
Its Schmitt-trigger action ensures fast switching, hysteresis, and clean transitions — ideal for digital interfacing and pulse shaping.
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Features:-
- High isolation 5000 VRMS
- DC input with Schmitt Trigger output
- 1MHz(NRZ) data rate
- RoHS compliance
- REACH compliance
- Temperature range – 55 °C to 100 °C
- Regulatory Approvals
- UL – UL1577 (E364000)
- VDE – EN60747-5-5(VDE0884-5)
- CQC – GB4943.1, GB8898
- IEC60065, IEC60950
Specification:-
| Symbol | Parameter | Value | Unit |
| VISO | Isolation voltage | 5000 | V |
| TOPR | Operating temperature | -55 ~ +100 | °C |
| IF | Forward current | 60 | mA |
| PD | Power dissipation | 100 | mW |
| F(TRANS) | Peak transient current (?1?s P.W,300pps) | 1 | A |
| VR | Reverse Voltage | 6 | V |
| Vo | Output Voltage | 0 to 16 | V |
| TSTG | Storage temperature range | – 55 to + 150 | °C |
| TSOL | Lead Solder Temperature | 260 for 10 sec | °C |
| Vcc | Supply Voltage | 3 to 16 | V |
| Io | Output Current | 50 | mA |
Advantages
- Converts noisy or slow analog signals into clean digital signals
- Does not require pull-up resistors (digital output)
- Excellent for microcontroller and logic interfacing
- Works better than transistor optocouplers for digital signal edges
- High noise immunity due to Schmitt trigger
- Great for isolating PWM, logic, and pulse signals
Applications
- Digital signal isolation
- Pulse shaping and clean-up for noisy inputs
- Isolated PWM signal transfer
- Microcontroller input protection
- Isolated logic-level interface (TTL/CMOS)
- Zero-crossing detection
- Switch-mode power supplies
- Industrial automation
- Motor control systems
- Frequency and pulse measurement circuits
- Optically isolated communication lines
*Product image for illustration purposes only, actual product may vary.









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