PS2503-1

Overview

The PS2503-1 is a low input current, high-speed switching multi-photocoupler series component manufactured by CEL. It consists of a Gallium Arsenide (GaAs) light-emitting diode optically coupled to an NPN silicon phototransistor. The device provides electrical isolation with a maximum output voltage of 40V and a continuous output current capability of 30mA per channel. It features a high common-mode transient immunity and supports a collector-emitter voltage of up to 40V. The part is available in 4-pin DIP or SMT packages.

Feature Summary

• Contains a GaAs LED and NPN silicon phototransistor for optical isolation
• Designed for low input current operation to reduce power consumption
• Offers high-speed switching capabilities for signal transmission
• Provides robust electrical isolation between input and output circuits

Applications

• Data acquisition systems requiring signal isolation
• Analog-to-digital converter interface circuits
• General-purpose digital signal transmission
• Microprocessor system I/O isolation

Procurement Notes

Verify the specific ordering suffix to confirm package type and tape/reel specifications, as variations exist for DIP and SMT formats. Confirm lifecycle status, as some listings indicate obsolete status for certain variants. Ensure compliance with RoHS requirements if applicable to your design constraints. Cross-reference the manufacturer's latest datasheet for any updates on recommended operating conditions.

Selection Notes

Select this component when low input drive current and high-speed response are required for isolated signal paths. Consider the 40V output voltage limit and 30mA current capacity against load requirements. Evaluate the need for GaAs LED technology for improved speed compared to standard infrared LEDs. Verify package compatibility with PCB layout constraints before finalizing the selection.

Part Context

The PS2503-1 belongs to a family of multi-photocouplers from CEL, often associated with NEC technology origins. It is distinct from higher-channel variants like the PS2503-2. The component serves as a fundamental building block for galvanic isolation in mixed-signal environments, bridging low-voltage logic circuits with higher-voltage domains safely.

Replacement Considerations

Direct substitutes may include other single-channel phototransistor optocouplers with similar CTR and isolation ratings. Check for equivalents from manufacturers offering comparable GaAs LED and NPN transistor configurations. Ensure replacement parts match the 40V Vceo and 30mA Iout specifications to maintain circuit performance integrity.