■ Features
1. High collector-emitter voltage (VCEO : 80V)
2. High isolation voltage between input and output ( Viso : 5 000V rms )
3. Current transfer ratio
   CTR : MIN. 50% at I F = 5mA, VCE = 5V
4. TTL compatible output
5. Recognized by UL, file No. E64380

■ Applications
1. Telephone systems, telegram systems
2. System appliances, measuring instruments
3. Signal transmission between circuits of different potentials and impedances