CT4504

Features 

• High speed 1Mbit/s 

• High isolation voltage between input and output 

(Viso=5000 Vrms ) 

• Guaranteed CTR performance from 0°C to 70°C 

• Wide operating temperature range of -55°C to 

100°C 

• Regulatory Approvals 

UL - UL1577 (E364000) 

VDE - EN60747-5-5(VDE0884-5) 

CQC – GB4943.1, GB8898 

IEC60065, IEC60950 

Applications 

• Line receivers 

• Telecommunication equipment 

• Feedback loop in switch-mode power supplies 

• Home appliances 

• High speed logic ground isolation 

Description 

The CT4504 series devices consist of an infrared 

emitting diode, optically coupled to a high speed 

photo detector transistor. A separate connection for 

the photodiode bias and output-transistor collector

increase the speed by several orders of magnitude 

over conventional phototransistor couplers by 

reducing the base-collector capacitance of the input 

transistor. 

The devices are packaged in an 8-pin DIP package 

and also available in gullwing (400mil) and surface

mount lead forming.