This document describes the features and characteristics of the high-density mounting phototransistor optically coupled isolators produced by ISOCOM COMPONENTS LTD, including high current transfer ratio, high isolation voltage, and high BVCEO. The product is suitable for computer terminals, industrial system controllers, measuring instruments, and signal transmission between systems of different potentials and impedances.
The TLP521, TLP521‑2 and TLP521‑4 are high‑density, dual‑in‑line optically coupled isolators that combine an infrared LED with an NPN photo‑transistor. They are offered in through‑hole, surface‑mount and tape‑and‑reel packages and are suited for computer terminals, industrial controllers and measuring instruments.
The document lists absolute maximum ratings, electrical characteristics and performance curves, including storage and operating temperature ranges, forward voltage, collector‑emitter breakdown voltage, current transfer ratio and power dissipation limits.
| Storage Temperature Range | -55 °C to +125 °C |
|---|---|
| Operating Temperature Range | -30 °C to +100 °C |
| Input Forward Voltage (Vf) | 1.0 V min – 1.15 V typ – 1.3 V max |
| Collector‑Emitter Breakdown Voltage (BVce) | 55 V |
| Total Power Dissipation | 200 mW |
The devices can be stored from –55 °C up to +125 °C.
The collector‑emitter breakdown voltage is 55 V.