LTV-845S-TA

Transistor, Photovoltaic Output Optoisolators Overview

The LTV-845S-TA is a four-channel surface-mount optocoupler manufactured by Lite-On Inc. It features photodarlington outputs and utilizes a 16-pin SOP (PDIP-style) package. The device provides an isolation voltage of 5000 Vrms, ensuring robust electrical separation between input and output circuits. Key electrical parameters include a maximum forward current of 50 mA and a typical forward voltage of 1.4 V. The collector-emitter saturation voltage is specified at a maximum of 1 V, with a maximum collector current of 80 mA. Current transfer ratios range from a minimum of 600% to a maximum of 7500%. Typical rise and fall times are documented as 60 µs and 53 µs respectively in some datasheets, while other sources cite higher values up to 300 µs for rise time.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• Four independent channels integrated into a single compact surface-mount package for space-efficient designs.
• High current transfer ratio capability allows for direct interfacing with digital logic inputs without additional amplification.
• Photodarlington output structure provides high gain and sensitivity for low-level signal detection.
• Strong insulation performance with 5000 Vrms isolation rating suitable for industrial safety standards.

Transistor, Photovoltaic Output Optoisolators Applications

• Industrial control systems requiring multi-channel signal isolation
• Data communication interfaces for noise immunity
• Power supply feedback loops for voltage regulation
• Microcontroller input/output expansion via isolated channels

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify the specific suffix 'TA' against the manufacturer's official documentation to confirm tape-and-reel packaging specifications and binning requirements. Ensure that the requested component matches the exact pinout and thermal characteristics defined in the latest datasheet revision. Cross-reference the part number with authorized distributors to avoid counterfeit components. Confirm compliance with RoHS directives if required for the target market. Check for any recent design changes or obsolescence notices from Lite-On Inc.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component when multiple isolated channels are needed in a small footprint. The photodarlington output is ideal for applications requiring high gain but slower switching speeds compared to transistor outputs. Consider the 5000 Vrms isolation rating for safety-critical applications. Evaluate the current transfer ratio variations to ensure sufficient margin for logic level triggering. Compare rise/fall times against system speed requirements to avoid signal distortion.

Transistor, Photovoltaic Output Optoisolators Part Context

The LTV-845S-TA belongs to Lite-On's LTV series of optocouplers, which are widely used in industrial and consumer electronics. This specific model is part of a family offering various channel counts and output types. The 'SMD' designation indicates its suitability for automated surface-mount assembly processes. It complements through-hole variants like the LTV-845, providing similar electrical performance in a more compact form factor.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

Public confirmed substitute part numbers: None identified in provided source material.