Toshiba’s Latest Photocouplers are Optimised for Mid-Speed Communications with Data Rates of 20kbps ~ 100kbps

Toshiba’s TLP2301 offers transmission rates up to 20kbps, allowing it to support the low-speed 9.6kbps or 19.2kbps of RS-232 communications. The TLP2303 supports the mid-speed 115.2kbps required by RS-232C communications. Both of the new devices can be driven at a low input current of 1mA.

The TLP2301 and TLP2303 consist of a high-speed photo detector that is optically coupled to a high-output GaAlAs infrared LED. The performance of the LED guarantees rated transmission delay times, even under a low input current condition of 1mA. The TLP2301 provides a significantly improved transmission delay time compared to general-purpose transistor photocouplers by incorporating a discharging resistor for the base stored charge on the photo-detector. The TLP2303 has a light-receiving chip with a high-speed photo Darlington transistor configuration, achieving up to 800% high current transfer ratio (IC/IF) at an input current of 1.6 mA.

Both of the photocouplers are supplied in an SO6 package. Despite a maximum height of 2.3mm, minimum creepage and clearance distances are 5mm and minimum input-output isolation voltage is rated at 3.75kVrms.

The TLP2301 and TLP2303 are rated for operation at temperatures from -55°C to 125°C and -40°C to 125°C respectively.