Toshiba Launches Dual Polarity Input Photocoupler for Servo Motors and PLCs

Toshiba Corporation (TOKYO:6502) today announced that it has launched “TLP2391”, a high-speed photocoupler for servo motors and programmable logic controllers (PLCs) which works with both plus and minus LED currents. Mass production is scheduled to start in December.

PLC applications accept one of two different polarity inputs: sink logic input and source logic input. The “TLP2391” supports both sink and source logic by combining two LEDs in inverse parallel, eliminating the need for a bridge circuit. The product supports 10Mbps high speed communications, twice as fast as other Toshiba dual input photocouplers1 allowing use in communications interfaces in industrial applications. The IC’s 2.3mA low input current drive (@ VCC = 3.3V) and 1mA low supply current contribute to energy efficiency.

Toshiba: "TLP2391", a high-speed photocoupler for servo motors and PLCs which works with both plus and minus LED currents. (LEDinside/Toshiba)

Applications

Programmable logic controllers (PLC), servo motors, and industrial automation equipment

Key Features of New Product

Operating temperature: Topr = -40 to 125°C
Supply voltage: VCC = 2.7 to 5.5V
Supply current: ICC = 1mA

Threshold input current:

IFHL = 2.3mA (VCC = 3.3V)

IFHL = 2.5mA (VCC = 5.0V)

Propagation delay time: tpHL / tpLH = 100ns (max)
Pulse width distortion: |tpHL-tpLH| = 30ns (max)
Propagation delay skew: tpsk = 40ns (max)

Note:

[1]: Comparison with 5Mbps speed of Toshiba dual input photocouplers, “TLP2395” and “TLP2398”.

For more information about the product, please visit:

http://www.semicon.toshiba.co.jp/info/lookup.jsp?pid=TLP2391&lang=en

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