The PS7241E-1A is an optically coupled element that combines a GaAs infrared LED on the input side with a normally-open MOS FET on the output side to realize an excellent cost performance. The small, thin package and high sensitivity of this element makes it ideal for battery-driven mobile devices, and its small offset voltage at power-on and good linearity are also make it suitable for controlling micro analog signals.
The PS7241E-1A is an optically coupled element that combines a GaAs infrared LED with a normally‑open MOSFET, offering a small, thin 4‑pin SOP package and low offset voltage. It is suited for battery‑driven mobile devices and for controlling micro‑analog signals.
The sheet lists absolute maximum ratings, recommended operating conditions, electrical characteristics, packaging details, and soldering guidelines, as well as safety and disposal information for the GaAs component.
| Breakdown Voltage (MOSFET) | 400 V |
|---|---|
| Isolation Voltage (BV) | 1500 Vrms |
| Forward Current (Diode) | 50 mA |
| Reverse Voltage | 5.0 V |
| Power Dissipation (continuous) | 50 mW |
| Continuous Load Current | 120 mA |
| Pulse Load Current | 240 mA |
| Operating Ambient Temperature | -40 to +85 °C |
| Storage Temperature | -40 to +100 °C |
| LED Operating Current | 4‑20 mA |
| LED Off Voltage | 0‑0.5 V |
| Diode Forward Voltage (IF=10mA) | 1.2‑1.4 V |
| Off‑state Leakage (Vb=400 V) | 1.0 µA |
| Output Capacitance (Vo=0V, f=1 MHz) | 18 pF |
| On‑state Resistance (Ir=10 mA) | 22‑35 Ω |
| Turn‑on Time (Ir=10 mA, Vo=5 V) | 0.5‑1.0 ms |
| Turn‑off Time (PW=2 ms) | 0.07‑0.2 ms |
| Isolation Resistance | 1.0 kΩ |
The MOSFET breakdown voltage is specified as 400 V.
The device is rated for an isolation voltage of 1500 Vrms.
Typical applications include laptop PCs, PDAs, modem cards, telephone/fax equipment, and measurement equipment.