Broadcom HCPL-4200 Optocoupler, 1 Channel, DIP 8-Pin, 3.75kV

The Broadcom HCPL-4200 is a precision 1-channel optocoupler designed specifically as a current loop receiver for equipment utilising the 20mA current loop standard. It provides a reliable interface where a logic high state is signalled by 20mA of loop current (MARK) and a logic low state by minimal loop current. Optical coupling effectively isolates the signal from the current loop to the logic output, breaking problematic ground loops and delivering exceptional common mode rejection for clean signal transmission.

This device incorporates a sophisticated buffer circuit on its current loop side, providing approximately 0.8mA of hysteresis. This feature significantly enhances immunity to both common mode and differential mode electrical noise, ensuring stable operation in noisy industrial environments. The buffer also manages the LED drive current, compensating for potential light output degradation over the component's lifetime to maintain consistent performance.

A key attribute is the internal shield, which guarantees a high common mode transient immunity of 1000V/µs, protecting the signal integrity from rapid voltage spikes. The data output is fully compatible with LSTTL, TTL, and CMOS logic families, offering broad system integration flexibility. Additional protections include a safeguarded LED against excess current and a 3-state output that makes the device compatible with shared data buses.

Primary Applications

• Computers and Computer Peripherals
• Motor Drive Control Systems
• Communications and Networking Equipment

Important Handling Note

Standard static discharge (ESD) precautions must be observed during the handling and assembly of this component to prevent potential damage or performance degradation. Market conditions for this product can lead to extended lead times and fluctuating delivery dates.