EL8178AIW-T7A

Product Overview

• Category: Optocoupler
• Use: Signal isolation and voltage level shifting in electronic circuits
• Characteristics:
  • High-speed response
  • Wide operating temperature range
  • Low power consumption
  • Compact package size
• Package: SOP-4
• Essence: Optoelectronic device for signal transmission and isolation
• Packaging/Quantity: Tape and reel, 3000 units per reel

Specifications

• Isolation Voltage: 3750 Vrms
• Forward Current: 50 mA
• Collector-Emitter Voltage: 80 V
• Operating Temperature Range: -40°C to +110°C
• Rise/Fall Time: 18 µs (typical)
• Propagation Delay: 80 ns (typical)

Pin Configuration

The EL8178AIW-T7A optocoupler has the following pin configuration:

____ 1 | | 2 | | 3 |______| 4

1. Anode (A)
2. Cathode (K)
3. Emitter (E)
4. Collector (C)

Functional Features

• Provides electrical isolation between input and output circuits
• Transmits signals using light waves
• Allows voltage level shifting between different parts of a circuit
• Fast response time enables high-speed data transmission
• Suitable for use in noisy environments due to its noise immunity

Advantages

• High-speed response allows for efficient signal transmission
• Wide operating temperature range makes it suitable for various applications
• Low power consumption helps conserve energy
• Compact package size saves space on PCBs
• Excellent noise immunity ensures reliable operation in noisy environments

Disadvantages

• Limited maximum collector-emitter voltage may restrict certain applications
• Requires careful handling during assembly due to its small size

Working Principles

The EL8178AIW-T7A optocoupler consists of an infrared LED (input) and a phototransistor (output) enclosed in a single package. When a current is applied to the LED, it emits infrared light. This light is then detected by the phototransistor, which generates a corresponding electrical signal. The input and output circuits are electrically isolated, allowing for signal transmission without direct electrical connection.

Detailed Application Field Plans

The EL8178AIW-T7A optocoupler finds applications in various fields, including:

1. Industrial automation: Signal isolation in control systems, motor drives, and power supplies.
2. Telecommunications: Voltage level shifting in communication interfaces, such as RS-232 and RS-485.
3. Medical equipment: Isolation of sensitive circuits from high-voltage components.
4. Automotive electronics: Signal isolation in automotive control modules and battery management systems.
5. Consumer electronics: Voltage level shifting and noise immunity in audio/video equipment.

Alternative Models

Other optocouplers that can be used as alternatives to the EL8178AIW-T7A include:

1. PC817: Standard optocoupler with similar specifications and package size.
2. HCPL-4506: High-speed optocoupler with higher isolation voltage and wider temperature range.
3. TLP521-4: Low-power optocoupler with compact package and lower forward current rating.

These alternative models offer similar functionality and can be chosen based on specific application requirements.

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