PS8821-1, -2 are optically coupled isolators containing a GaAlAs LED on the input side and a PIN photodiode and high-speed amplifier transistor on the output side on one chip. They feature a 40% reduction in mounting area, low power consumption, high isolation voltage, and high-speed response.
The NEC PS8821‑1 and PS8821‑2 are high‑speed optically coupled isolators that integrate a GaAlAs LED, a PIN photodiode and a high‑speed amplifier transistor on a single chip. They are designed for high‑density applications such as Power over Ethernet, computer peripherals and relay replacements.
The document provides package dimensions, marking conventions, ordering numbers for various tape and reel formats, absolute maximum ratings, recommended operating conditions, detailed electrical characteristics, typical performance graphs, usage cautions and safety/disposal guidelines.
| Isolation Voltage (BV) | 2.5 kV RMS |
|---|---|
| Supply Voltage (Vcc) | 3.0 V min – 3.6 V max (typical 3.3 V) |
| Forward Current (IF) | 16 mA typical, 20 mA max |
| Output Current (Io) | 8.0 mA per channel |
| Power Dissipation (Diode) | 45 mW per channel |
| Power Dissipation (Transistor) | 100 mW per channel |
| Operating Temperature Range | -55 °C to +100 °C |
The recommended supply voltage is 3.3 V, with an acceptable range of 3.0 V to 3.6 V.
The optocoupler provides an isolation voltage of 2.5 kV RMS.