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TLG344 Specifications

Detailed technical information and Application Scenarios

Product Details

PartNumberManufactorQuantityAvailability
TLG344TOSHIBA950Yes

TLG344 is a phototransistor coupler manufactured by Toshiba.

The TLG344 is a phototransistor coupler manufactured by Toshiba. Below are its key specifications, descriptions, and features:

Specifications:

  • Isolation Voltage (VISO): 5000Vrms (min)
  • Collector-Emitter Voltage (VCEO): 30V (max)
  • Emitter-Collector Voltage (VECO): 5V (max)
  • Collector Current (IC): 50mA (max)
  • Power Dissipation (Ptot): 100mW (max)
  • Current Transfer Ratio (CTR): 50% (min) at IF = 5mA, VCE = 5V
  • Operating Temperature Range: -55°C to +110°C
  • Response Time (tPLH, tPHL): 4μs (typical)

Description:

The TLG344 is a high-speed phototransistor coupler designed for signal transmission between isolated circuits. It consists of a GaAs infrared LED optically coupled to a silicon phototransistor in a compact 4-pin DIP package.

Features:

  • High isolation voltage (5000Vrms)
  • Fast response time (4μs typical)
  • High current transfer ratio (CTR ≥ 50%)
  • Compact 4-pin DIP package
  • Reliable performance across a wide temperature range (-55°C to +110°C)
  • Suitable for digital and analog signal isolation

This coupler is commonly used in power supply feedback circuits, industrial control systems, and communication interfaces requiring electrical isolation.

(Note: Always refer to the official Toshiba datasheet for the most accurate and updated specifications.)

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