6N138 Datasheet

Low Input Current High Gain Split Darlington Optocouplers


Features, Applications

The 6N138/9 and HCPL-2730/HCPL-2731 optocouplers consist of an AlGaAs LED optically coupled to a high gain split darlington photodetector. The split darlington configuration separating the input photodiode and the first stage gain from the output transistor permits lower output saturation voltage and higher speed operation than possible with conventional darlington phototransistor optocoupler. In the dual channel devices, HCPL-2730/HCPL2731, an integrated emitter - base resistor provides superior stability over temperature. The combination of a very low input current 0.5 mA and a high current transfer ratio of 2000% makes this family particularly useful for input interface to MOS, CMOS, LSTTL and EIA RS232C, while output compatibility is ensured to CMOS as well as high fan-out TTL requirements. An internal noise shield provides exceptional common mode rejection of 10 kV/�s. An improved package allows superior insulation permitting 480 V working voltage compared to industry standard 8 1


Low current 0.5 mA Superior CTR-2000% Superior CMR-10 kV/�s Double working voltage-480V RMS CTR guaranteed 0-70�C U.L. recognized (File # E90700) Dual Channel HCPL-2730 HCPL-2731


Digital logic ground isolation Telephone ring detector EIA-RS-232C line receiver High common mode noise line receiver �P bus isolation Current loop receiver

Parameter Storage Temperature Operating Temperature Lead Solder Temperature EMITTER DC/Average Forward Input Current

(No derating required to 85�C) Symbol TSTG TOPR TSOL Each Channel Each Channel IF (avg) IF (pk) IF (trans) Each Channel Each Channel Each Channel (6N138 and (6N139, HCPL-2731) Each Channel PD IO (avg) VEB VCC, VO PD Value +85 260 for 10 sec 18 100 Units V mW

Peak Forward Input Current (50% duty cycle, 1 ms P.W.) Peak Transient Input Current (!"1 �s P.W., 300 pps) Reverse Input Voltage Input Power Dissipation DETECTOR Average Output Current Emitter-Base Reverse Voltage Supply Voltage, Output Voltage Output power dissipation

Parameter EMITTER Input Forward Voltage Input Reverse Breakdown Voltage

Test Conditions TA =25�C) Each Channel (IF = 1.6 mA) (TA = 10 �A) Each Channel (IF = 1.6 mA) Symbol VF BVR (#VF/#TA) Device All 6N139 IOH HCPL-2730 6N138 ICCL HCPL-2730 6N138 ICCH 20 5.0 Min Typ** 1.30 Max Unit V mV/�C �A

(IF = 0 mA, VO = VCC 18 V) Each Channel (IF = 0 mA, VO = VCC 7 V) Each Channel (IF = 1.6 mA, VO = Open) (VCC = 1.6 mA, VCC VO2 = Open, VCC 7 V) (IF = 0 mA, VO = Open)

Parameter COUPLED Current transfer ratio (Notes 1,2)

(TA to 70�C Unless otherwise specified) Test Conditions Symbol Device 6N139 HCPL-2731 CTR HCPL-2731 6N139 VOL 6N138 HCPL-2730 Min 500 300 Typ** V 0.4 Max Unit %

(IF = 0.5 mA, 0.4 V, VCC 4.5 V) Each Channel (IF = 1.6 mA, 0.4 V, VCC 4.5 V) Each Channel (IF = 1.6 mA, 0.4 V, VCC 4.5 V) Each Channel (IF = 0.5 mA, = 2 mA, VCC 4.5 V) (IF = 1.6 mA, = 8 mA, VCC 4.5 V) Each Channel

Logic low output voltage (IF = 5 mA, = 15 mA, VCC 4.5 V) output voltage (Note 2) Each Channel (IF = 12 mA, = 24 mA, VCC 4.5 V) Each Channel (IF = 1.6 mA, = 4.8 mA, VCC 4.5 V) Each Channel All typicals = 25�C



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Manufacturer information


Fairchild has a rich history as a pioneer in the semiconductor industry and that pioneering spirit endures today. In an era where diversity can dilute focus and hamper innovation, we specialize in the development and manufacturing of a complete portfolio of low- to high-power solutions for the mobile, industrial, cloud, automotive, lighting, and computing industries. Fairchild is one of the most reliable partners in the industry, offering the shortest time from concept to silicon, expert FAEs for customer support, and a flexible, multi-source supply chain. Our vision is clear – anticipate the power efficiencies demanded by tomorrow’s electronic products and deliver an amazing design experience

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