Toshiba offers photocouplers compliant with a wide range of communication standards such as low- to medium-speed RS-232 and high-speed RS-485 and those for factory networks. The isolation voltage as high as 5 kVrms enhances the safety of an end application, while the initial input current of approximately 1 mA provides an energy-efficient solution.
Photocouplers with low input current
Photocouplers with a maximum operating temperature (Topr) of 125°C
|8 mm||4 or 5 mm*2||8mm||7 or 8 mm*1||7 or 8 mm*1||4 mm|
SO6 / MFSOP6
|DIP8 1ch||DIP8 2ch||SO8 1ch||SO8 2ch|
|～1 Mbps||Open collector
*1: DIP8 and SDIP6 packages with clearance and creepage distances of 8 mm are available.
* To order photocouplers in a package with guaranteed clearance and creepage distances of 8 mm, suffix the part number with the letter F. Example: TLP754F
*2: 5 mm for SO6 package; 4 mm for MFSOP6 package
1. Extensive product lineup with a data rate ranging from 20 kbps to 50 Mbps
Toshiba offers photocouplers compliant with various communication standards ranging from RS232 to those for factory networks.
The TLP2301 and TLP2303 are ideal for medium-speed communications with a data rate from 9.6 kbps to 100 kbps such as RS232 and RS232C. These photocouplers can operate with a low input current of approximately 1 mA and are less expensive than high-speed IC-output photocouplers with a data rate exceeding 1 Mbps. Due to these characteristics, the TLP2301 and TLP2303 help reduce the cost and power consumption of various applications such as factory equipment, as well as home appliances and housing equipment, including power supplies, air conditioners and smart meters.
Major Communication Standards and Guidelines for Photocoupler Selection*3
*3: Usable photocouplers depend on actual operating conditions (frequency, ambient temperature, etc.).
2． Photocouplers with sink and source logic
Sink logic (primarily in Japan) or source logic (primarily outside of Japan) may be used for interfacing with PLCs and industrial equipment. However, the LED on the input side of a high-speed photocoupler is unidirectional. Thus, to accommodate both sink and source signals, a bridge circuit must be inserted before the LED in the photocoupler. To address this problem, Toshiba offers the TLP2395 and TLP2398 photocouplers that contain two LEDs in an antiparallel configuration. These photocouplers eliminate the need for an on-board bridge circuit and thus help reduce the board size and system costs.
3． 3.3 V drive and low power consumption
Toshiba offers many photocouplers that can operate from both 3.3 V and 5 V power supplies. Since these photocouplers can be used in mixed 3.3/5 V systems, you can use common parts across different product lines. Toshiba also offers an extensive lineup of photocouplers with a low LED current. Photocouplers that operate with an LED current of 2 mA or less are marked with in the recommended photocoupler list.