The applications are broad and varied, although one of the most popular is in programmable logic controllers (PLCs), essential for automating modern factories.
 
To function correctly, photocouplers require that input signals have a minimum rise time to avoid unwanted switching at the output. The four new photocouplers (TLP2362B, TLP2368B, TLP2762B, TLP2768B) comply with IEC 61131-2 (Type 1) and provide hysteresis for the input lead current threshold as well as for the power supply circuit, making them suitable for use in high-EMC noise environments.
 
By providing this hysteresis within the device, it is ensured that the output will maintain its "high" or "low" state without additional switching. The integrated hysteresis eliminates the need for external circuitry (such as Schmitt triggers) and reduces complexity and cost.
 
The most demanding applications, such as PLCs, require photocouplers with data transmission speeds exceeding the typical levels of a few Kbps. The four new photocouplers incorporate a high-gain, high-speed amplifier, enabling the TLP2362B and TLP2762B to support 10 Mbps and the TLP2368B and TLP2768B to support 20 Mbps. This allows for faster communication in end applications.
 
All devices can supply an output current (Io) of 25 mA and tolerate input rise and fall times of up to 60 seconds. Operation is unaffected as long as the supply voltage (VCC) is restored within 60 seconds.
 
The TLP2368B and TLP2768B achieve a propagation delay of less than 60 ns. The TLP2362B and TLP2368B are housed in a 5-pin SO6 package measuring 3.7 mm x 7.0 mm x 2.3 mm with an insulation voltage (BVs) exceeding 3750 Vrms. The TLP2762B and TLP2768B are housed in an SO6L package (3.84 mm x 10.0 mm x 2.3 mm) and have an insulation voltage (BVs) exceeding 5000 Vrms.
 
All four new photocouplers are capable of operating at ambient temperatures up to 125°C and as low as -40°C, ensuring that end applications, such as PLCs, can operate reliably under all conditions.