The IL221AT/IL222AT/IL223AT is a high current transfer ratio (CTR) optocoupler featuring a gallium arsenide infrared LED emitter and a silicon NPN photodarlington transistor detector. Designed for low input current applications, it offers high gain and a base connection for added flexibility. Its SOIC-8 surface mountable package is ideal for high-density applications and conforms to standards for surface mount devices. This optocoupler is suitable for interfacing from CMOS to LSTTL or TTL.
| Part Number | Description | Isolation Test Voltage (VRMS) | CTR (%) (min) | Forward Voltage (V) (typ) | Collector Emitter Breakdown Voltage (V) (min) | Collector Current (mA) (DC max) | Power Dissipation (mW) |
| IL221AT | Photodarlington Output, Low Input Current, High Gain, with Base Connection | 4000 | 100 | 1.0 | 30 | 50 | 90 (Input), 150 (Output) |
| IL222AT | Photodarlington Output, Low Input Current, High Gain, with Base Connection | 4000 | 200 | 1.0 | 30 | 50 | 90 (Input), 150 (Output) |
| IL223AT | Photodarlington Output, Low Input Current, High Gain, with Base Connection | 4000 | 500 | 1.0 | 30 | 50 | 90 (Input), 150 (Output) |