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FOD2743AT
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Product Detailed Parameters
- Description：OPTOISOLATOR 5KV 1CH TRANS 8-DIP
- Series：-
- Mfr：Fairchild Semiconductor
- Package：Tube
- Number of Channels：1
- Voltage - Isolation：5000Vrms
- Current Transfer Ratio (Min)：50% @ 1mA
- Current Transfer Ratio (Max)：100% @ 1mA
- Turn On / Turn Off Time (Typ)：-
- Rise / Fall Time (Typ)：-
- Input Type：DC
- Output Type：Transistor
- Voltage - Output (Max)：70V
- Current - Output / Channel：50mA
- Voltage - Forward (Vf) (Typ)：1.07V
- Current - DC Forward (If) (Max)：-
- Vce Saturation (Max)：400mV
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Through Hole
- Package / Case：8-DIP (0.400", 10.16mm)
- Supplier Device Package：8-DIP
- Grade：-
- Qualification：-
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Overview
The FOD2743AT is a single-channel transistor output optocoupler manufactured by Fairchild Semiconductor. It features an infrared LED coupled to a phototransistor for electrical isolation. The device provides a minimum current transfer ratio of 50% at 1 mA and supports a maximum collector-emitter voltage of 70 V. It operates within a temperature range of -25 °C to 85 °C and offers an insulation voltage of 5000 Vrms. The component is housed in an 8-pin DIP package with a lead spacing of 0.4 inches.
Feature Summary
- Provides high-voltage electrical isolation between input and output circuits
- Designed specifically for coupling error amplifiers in feedback loops
- Features a standard transistor output configuration for signal transmission
Applications
- Error amplifier coupling in switching power supplies
- Feedback loop isolation in motor control systems
- Signal transmission across isolated ground planes
Procurement Notes
Verify the manufacturer origin, as Fairchild Semiconductor's semiconductor division was acquired by onsemi. Confirm that the specific part number corresponds to the original Fairchild production run rather than the subsequent onsemi manufacturing line. Ensure compliance with RoHS directives if required by the target application specifications.
Selection Notes
Select this component when a low current transfer ratio (50%) is sufficient for the error amplifier circuit design. Compare against the FOD2741 series if a higher gain (100%) is required for the same application. Ensure the DIP-8 package dimensions align with the printed circuit board layout constraints.
Part Context
This device belongs to the FOD274x family of optocouplers designed for precision analog signal isolation. It shares functional similarities with other models in the series but differs in current transfer ratio specifications. The AT suffix typically denotes the tube packaging format for through-hole DIP components.
Replacement Considerations
The FOD2741AT is a related model offering a higher current transfer ratio of 100%. Verify pinout compatibility before substitution. Note that onsemi may produce equivalent variants under updated part numbering schemes.
