Photocouplers can be used in isolated bus drivers

Toshiba has launched two high-speed photocouplers that are said to be ideal for applications such as isolated bus drivers, high-speed line receivers and microprocessor system interfaces.

The six-pin SDIP (shrink DIP) TLP715 and TLP718 photocouplers deliver isolated switching in accordance with international safety standards, in packages that are half the size of eight-pin DIP alternatives with the same performance.

Offering maximum switching speeds of 250ns, the TLP715 and TLP718 provide buffer (non-inverter) and inverter logic outputs, respectively.

Both couplers have minimum isolation ratings of 5,000Vrms, despite compact physical dimensions of 6.8 x 4.58 x 3.65mm.

This allows designers to meet the reinforced insulation class requirements of international safety standards.

An internal Faraday shield provides a guaranteed common-mode transient immunity of +/-10kV/us.

Featuring totem-pole outputs, the TLP715 and TLP718 can provide either source and sink driving.

Both devices will operate with an input of between 4.5 and 20V, while maximum input current is 3mA.

The couplers are based around a GaAlAs infrared LED that is optically coupled to a high-gain, high-speed photodetector.

International certifications include UL1577, c-UL, TUV and VDE.

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