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Photocouplers for High-Speed Communications

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.

List of the Recommended Photocouplers for High-Speed Communications

LPhotocouplers with low input current
HPhotocouplers with a maximum operating temperature (Topr) of 125°C

Clearance/Creepage
Distance
8 mm 4 or 5 mm*2 8mm 7 or 8 mm*1 7 or 8 mm*1 4 mm

Data Rate
(Typ.)
Output
Configuration

SO6L


SO6 / MFSOP6

SO8L 2ch

SDIP6
DIP8 1ch DIP8 2ch SO8 1ch SO8 2ch
~20kbps Open collector
TLP2701 TLP2301
~100kbps Open collector
TLP2703 TLP2303 TLP2403
~1 Mbps Open collector
TLP109
TLP2309
TLP719 TLP759

TLP2530

TLP2531

TLP2409
Open collector
TLP104 TLP714 TLP754 TLP2404
~5 Mbps Totempole
TLP2710 TLP2355
TLP2358
TLP2310
TLP715
TLP718
TLP2955
TLP2958
TLP2405
TLP2408

TLP2105

TLP2110

sink/source input
TLP2395
TLP2398
~20Mbps Open collector
TLP2768A TLP2362
TLP2368
TLP2768 TLP2962 TLP2662H TLP2468 TLP2168
TLP2118E
Totempole

TLP2761

TLP2770

TLP2361
TLP2366

TLP2361

TLP2261

TLP2270

TLP2766 TLP2466 TLP2161
TLP2160
sink/source input
TLP2391  
~50Mbps Totempole
TLP2767 TLP2367

*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

Product List

List of Photocouplers for High-Speed Communications
You can search the entire list of photocouplers for high-speed communications, based on characteristics.

Features of Photocouplers for High-Speed Communications

  • Extensive product lineup with a data rate ranging from 20 kbps to 50 Mbps
  • Photocouplers with sink and source logic (TLP2395/2398)
  • 3.3 V drive and low power consumption

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

img_communication_10_e
*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.

img_communication_11_e

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 L in the recommended photocoupler list.

Other Photocouplers/Photorelays

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·Before creating and producing designs and using, customers must also refer to and comply with the latest versions of all relevant TOSHIBA information and the instructions for the application that Product will be used with or for.