Part Number Search

Cross Reference Search

About information presented in this cross reference

The information presented in this cross reference is based on TOSHIBA's selection criteria and should be treated as a suggestion only. Please carefully review the latest versions of all relevant information on the TOSHIBA products, including without limitation data sheets and validate all operating parameters of the TOSHIBA products to ensure that the suggested TOSHIBA products are truly compatible with your design and application.
Please note that this cross reference is based on TOSHIBA's estimate of compatibility with other manufacturers' products, based on other manufacturers' published data, at the time the data was collected.
TOSHIBA is not responsible for any incorrect or incomplete information. Information is subject to change at any time without notice.

Keyword Search

Parametric Search

Stock Check & Purchase

Select Product Categories

How are the current transfer ratio (CTR), trigger LED current, and threshold input current measured?

Measurement procedure for current transfer ratio, IC/IF (CTR) - Transistor output

Refer to Toshiba Application Note “Glossary of Photocoupler and Photorelay Terms”, section 2. Measurement procedure for current transfer ratio, IC/IF(CTR) - Transistor output, section 3. Measurement procedure for threshold input current, IFHL(IFLH) - IC output, and section 4. Measurement procedure for trigger LED current, IFT.
(https://toshiba.semicon-storage.com/ap-en/semiconductor/knowledge/application-note.html)

Example: Current transfer ratio (CTR) measurement circuit
(Excerpts from Application Note "Glossary of Photocoupler and Photorelay Terms",
section 2. Measurement procedure for current transfer ratio,IC/IF(CTR)- Transistor output)

A new window will open