Photocoupler supports transfer rates of up to 15Mbps

Posted By : Nat Bowers
Photocoupler supports transfer rates of up to 15Mbps

Combining high-speed communication with low power consumption, the TLP2361 and TLP2161 photocouplers have been introduced by Toshiba. Suitable applications for the devices include use in factory networking, high-speed digital interfacing for instrumentation and control devices, and I/O interface boards.

Operating over a temperature range from -40 to +125°C, the TLP2361 and TLP2161 utilise Toshiba's proprietary high-reliability, high-output GaAlAs infrared LEDs. Thanks to the LED's high output and reliability, a maximum low threshold input current of just 1.6mA and supply current per channel of 1.0mA are enabled. This represents a 54% reduction in low threshold input current and for supply current per channel: a reduction of 66% for TLP2361 and 60% for TLP2161 compared to conventional products, such as Toshiba’s TLP2366 and TLP2160.

As a result of this lower input current rating, the photocouplers can be driven directly by the microprocessor without a buffer. This enables lower power consumption, lower component count and reduced costs. The receiver IC characteristics are guaranteed over power voltages of 2.7-5.5V in order to accommodate the trend towards lower power voltages.

Compliant with the reinforced insulation class of various safety standards (with insulation voltage rated with a minimum of 3750Vrms), the TLP2361 is supplied in a compact SO6 package with guaranteed clearance and creepage distance of at least 5mm. With insulation voltage rated with a minimum of 2500Vrms, the TLP2161 combines two circuits into an S08 package. Reducing the mounting area by approximately 40%, compared with two TLP2361 units, this further contributes to downsizing and reducing PCB cost.

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