Low-power photocoupler supports transfer rates up to 15Mbps

January 24, 2014 // By Graham Prophet
For factory networking, high-speed digital interfacing for instrumentation and control devices, and for I/O interface boards, Toshiba has two new optocouplers/photocouplers in SO6 and SO8 packages.

Using Toshiba's own high-reliability, high-output GaAlAs (MQW) infrared light-emitting diodes, operation is guaranteed from -40°C to 125°C. The LED's high output and reliability enables low threshold input current of 1.6mA (max.), a reduction of 54% compared with equivalent products such as Toshiba’s TLP2366 and TLP2160. Supply current per channel is reduced to 1.0 mA per channel, a reduction of 66% for TLP2361 and 60% for TLP2161 compared to conventional products.

The lower input current rating means that the photocouplers can be driven directly by a microprocessor/microcontroller without requiring a buffer, which contributes to lower power consumption, lower component count and reduced costs. In order to accommodate the trend towards lower power voltages, the receiver IC characteristics are guaranteed over a power voltage range from 2.7 to 5.5V.

TLP2361 comes in an SO6 package with guaranteed clearance and creepage distance of min. 5mm, and with an insulation voltage of 3750 Vrms. This is compliant with the reinforced insulation class of various safety standards.

TLP2161 combines two circuits into an S08 package, reducing mounting area by approximately 40%, compared with two TLP2361 units. Its insulation voltage is rated to a minimum of 2500 Vrms.

Toshiba Electronics Europe; www.toshiba-components.com