TLP551 is a high-speed light receiving device suitable for interfaces of electronic computers, measuring instruments, control devices, etc. It can be used for noise reduction in system equipment and measuring instruments, as well as signal transmission between circuits with different potentials.
The TLP551 is a GaAs optocoupler with a high‑output infrared LED on the input side and a PN photodiode with an amplification transistor on the output side. It is suited for high‑speed pulse data transmission in computers, measurement equipment, and control devices, and can be made TTL‑compatible by adding a resistor.
The document includes pin‑out diagrams, internal circuit schematics, and detailed electrical, switching, and isolation characteristics, along with handling guidelines and safety notices for the device. This manual is written in Japanese.
| Isolation voltage (minimum) | 2500 Vrms |
|---|---|
| Pulse response time (high-to-low) | 0.5 µs |
| Pulse response time (low-to-high) | 0.6 ns |
| Forward current (IF) maximum | 25 mA |
The TLP551 has a minimum isolation voltage of 2500 Vrms.
The high‑to‑low transition time is 0.5 µs and the low‑to‑high transition time is 0.6 ns.