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TLP571 from TOSHIBA

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TLP571

Manufacturer: TOSHIBA, TOS

Photocoupler GaAs IRed & Photo .Transistor

Partnumber Manufacturer Quantity Availability
TLP571 TOSHIBA, TOS 94 In Stock

Description and Introduction

Photocoupler GaAs IRed & Photo .Transistor The TLP571 is an optocoupler (photocoupler) manufactured by **TOSHIBA**. Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:  

### **Specifications:**  
- **Isolation Voltage:** 5000 Vrms (min)  
- **Collector-Emitter Voltage (VCEO):** 80 V (max)  
- **Emitter-Collector Voltage (VECO):** 7 V (max)  
- **Forward Current (IF):** 50 mA (max)  
- **Power Dissipation (PD):** 200 mW (max)  
- **Operating Temperature Range:** -55°C to +110°C  
- **Current Transfer Ratio (CTR):** 50% (min) at IF = 5 mA, VCE = 5 V  
- **Response Time:**  
  - Turn-on Time (ton): 3 μs (max)  
  - Turn-off Time (toff): 2 μs (max)  

### **Description:**  
The **TLP571** is a high-speed **photocoupler** with a **GaAs infrared LED** optically coupled to a **high-speed phototransistor**. It is designed for **signal isolation** in digital and analog circuits.  

### **Features:**  
- **High isolation voltage (5000 Vrms)**  
- **High-speed response (3 μs max turn-on time, 2 μs max turn-off time)**  
- **Compact 4-pin DIP package**  
- **Wide operating temperature range (-55°C to +110°C)**  
- **Compliant with safety standards (UL, cUL, VDE recognition)**  

The TLP571 is commonly used in **industrial control systems, power supply feedback circuits, and signal isolation applications**.  

(Note: Always refer to the latest **TOSHIBA datasheet** for precise technical details.)

Application Scenarios & Design Considerations

Photocoupler GaAs IRed & Photo .Transistor

Alternative Part Number

  • PC817 --: Industry-standard general-purpose optocoupler with similar CTR and isolation ratings, widely available and pin-compatible in most circuits.
  • EL817 --: Direct functional equivalent optocoupler with comparable isolation voltage and current transfer ratio, often used as a drop-in replacement.
  • LTV-817 --: Similar single-channel phototransistor optocoupler offering equivalent isolation and CTR performance at competitive cost.

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