Hewlett-Packard HCPL-4200
The HCPL-4200 optocoupler is designed to operate as a receiver in equipment using the 20 mA Current Loop.FEATURES
● Data Output Compatible with LSTTL, TTL and CMOS● 20 K Baud Data Rate at 1400 Metres Line Length
● Guaranteed Performance over Temperature (0°C to 70°C)
● 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 Approval UL Recognized -2500 V rms, for 1 Minute CSA Approved
● Optically Coupled 20 mA Current Loop Transmitter, HCPL-4100, Also Available
DESCRIPTION
20 mA current loop systems conventionally signal a logic high state by transmitting 20 mA of loop current (MARK), and signal a logic low state by allowing no more than a few milliamperes of loop current (SPACE). Optical coupling of the signal from the 20 mA current loop