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This device is a very low power consumption high gain single channel optocoupler. It is the equivalent single channel product of the dual channel HCPL-073A in an SO-8 footprint. Each channel can be driven with an input current as low as 40 mA and has a typical current transfer ratio of 3500%.
This high gain coupler uses an AlGaAs LED and an integrated high gain photodetector to provide an extremely high current transfer ratio between input and output. Separate pins for the photodiode and output stage results in TTL compatible saturation voltages and high speed operation. Where desired, the VCC and VO terminals may be tied together to achieve conventional Darlington operation.
This device is designed for use in CMOS, LSTTL and other low power applications. It is especially well suited for ISDN telephone interface and battery operated applications due to the low power consumption. A 700% minimum current transfer ratio is guaranteed from 0 degrees C to 70 degrees C operating temperature range at 40 mA of LED current and VCC >= 3 V.
The SO-8 does not require "through holes" in a PCB. This package occupies approximately one-third the footprint area of the standard dual-in-line package. The lead profile is designed to be compatible with standard surface mount processes.
HCPL-070A Features
• Ultra Low Input Current Capability - 40 A • Specified for 3 V Operation Typical Power Consumption: <1 mW Input Power: <50 W Output Power: <500 mW • Will Operate with VCC as Low as 1.6 V • High Current Transfer Ratio 3500% at IF = 40 A • TTL and CMOS Compatible Output • Specified AC and DC Performance over Temperature: 0°C to 70°C • Safety Approval UL Recognized - 2500 V rms for 1 Minute and 5000 V rms* for 1 minute per UL1577 CSA Approved VDE 0884 Approved with VIORM = 630 V peak (Option 060) for HCPL-4701 • 8-Pin Product Compatible with 6N138/6N139 and HCPL-2730/HCPL-2731 • Available in 8-Pin DIP and SOIC-8 Footprint • Through Hole and Surface Mount Assembly Available
HCPL-070A Typical Application
• Battery Operated Applications • ISDN Telephone Interface • Ground Isolation between Logic Families TTL, LSTTL, CMOS, HCMOS, HL-CMOS, LV-HCMOS • Low Input Current Line Receiver • EIA RS-232C Line Receiver • Telephone Ring Detector • AC Line Voltage Status Indicator - Low Input Power Dissipation • Low Power Systems Ground Isolation • Portable System I/O Interface