Description

The HCPL-4218 is an electronic component model categorized as an IC chip. It is designed to function as a receiver in equipment that utilizes the 20 mA Current Loop signaling system. In this system, a logic high state is indicated by transmitting 20 mA of loop current (MARK), while a logic low state is represented by allowing only a few milliamperes of loop current (SPACE). The HCPL-4218 is an optical coupler that ensures reliable signal transmission and reception.

Specifications and Features

- Data output compatible with LSTTL, TTL, and CMOS

- Data rate of 20 K Baud at a line length of 1400 meters

- Guaranteed On and Off thresholds

- LED is protected from excess current

- Input threshold hysteresis

- Three-state output compatible with data buses

- Internal shield for high Common Mode Rejection

- Safety approvals: UL recognized - 3750 V rms for 1 minute, CSA approved

- Optically coupled 20 mA current loop transmitter, HCPL-4100, also available

Application Scenarios

- Isolated 20 mA current loop receiver

- Suitable for computer peripherals

- Ideal for industrial control equipment

- Suitable for data communications equipment

Comparison

- Data output compatibility with various systems

- Guaranteed thresholds for reliable operation

- Protection of LED from excess current

- Internal shield for high Common Mode Rejection

- No specific disadvantages have been identified for this model.