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TIL191A from TI,Texas Instruments

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TIL191A

Manufacturer: TI, TEXAS, ISOCOM

5V; 50mA high density mounting phototransistor optically coupled isolator

Partnumber Manufacturer Quantity Availability
TIL191A TI, TEXAS, ISOCOM 595 In Stock

Description and Introduction

5V; 50mA high density mounting phototransistor optically coupled isolator The part **TIL191A** is manufactured by **ISOCOM**. Below are the specifications, descriptions, and features based on the available knowledge:

### **Specifications:**  
- **Type:** Infrared Emitting Diode (IRED)  
- **Wavelength:** 940 nm (typical)  
- **Forward Voltage (Vf):** 1.5 V (typical at 50 mA)  
- **Forward Current (If):** 50 mA (continuous)  
- **Radiant Intensity:** 20 mW/sr (minimum at 50 mA)  
- **Viewing Angle:** 20° (typical)  
- **Reverse Voltage (Vr):** 3 V (maximum)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package Type:** T-1 (3mm)  

### **Descriptions:**  
- The **TIL191A** is a high-efficiency infrared emitting diode designed for applications requiring reliable IR transmission.  
- It is commonly used in remote control systems, optical switches, and sensor applications.  
- The device emits light at a peak wavelength of 940 nm, which is optimal for IR receivers.  

### **Features:**  
- High radiant intensity output.  
- Narrow viewing angle for focused emission.  
- Low forward voltage for energy efficiency.  
- Reliable performance across a wide temperature range.  
- Industry-standard T-1 (3mm) package for easy integration.  

For exact performance characteristics, refer to the official **ISOCOM datasheet** for the **TIL191A**.

Application Scenarios & Design Considerations

5V; 50mA high density mounting phototransistor optically coupled isolator

Alternative Part Number

  • LTV-817 --: Industry-standard single-channel phototransistor optocoupler with similar CTR and isolation ratings, widely available and pin-compatible in most circuits.
  • PC817 --: Very common 4-pin DIP optocoupler with comparable current transfer ratio and isolation voltage, a direct functional substitute for the TIL191A.
  • 4N35 --: General-purpose phototransistor optocoupler with 6-pin DIP package and similar isolation performance, suitable when a slightly different pinout can be accommodated.
  • 4N25 --: Industry-standard 6-pin optocoupler with phototransistor output, widely available and electrically similar to the TIL191A for general isolation use.

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