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Product Detailed Parameters
- Description：6PIN DARLINGTON OUTPUT, SINGLE,
- Series：-
- Mfr：Isocom Components 2004 LTD
- Package：Tube
- Number of Channels：-
- Voltage - Isolation：-
- Current Transfer Ratio (Min)：-
- Current Transfer Ratio (Max)：-
- Turn On / Turn Off Time (Typ)：-
- Rise / Fall Time (Typ)：-
- Input Type：-
- Output Type：-
- Voltage - Output (Max)：-
- Current - Output / Channel：-
- Voltage - Forward (Vf) (Typ)：-
- Current - DC Forward (If) (Max)：-
- Vce Saturation (Max)：-
- Operating Temperature：-
- Mounting Type：-
- Package / Case：-
- Supplier Device Package：-
- Grade：-
- Qualification：-
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Overview
The 4N29SM is a general-purpose, single-channel photodarlington optocoupler manufactured by Isocom Components 2004 LTD. It features a six-pin DIP package and utilizes an infrared LED coupled to a Darlington transistor output for high sensitivity. The device provides electrical isolation with a rated voltage of 5300Vrms. Key electrical parameters include a maximum forward voltage of 1.65V, a typical rise time of 2µs, and a typical fall time of 11µs. It supports a maximum input current of 60mA and offers a current transfer ratio ranging from 40% to 80%.
Feature Summary
- High sensitivity to low input drive currents due to the Darlington output configuration
- Provides robust electrical isolation between input and output circuits
- Designed for general-purpose signal transmission applications
Applications
- General-purpose signal isolation in electronic circuits
- Interface between microprocessors and peripheral devices
- Switching applications requiring high input-output isolation
Procurement Notes
Verify that the specific part number matches the required Darlington output configuration and six-pin package style. Confirm that the isolation voltage rating of 5300Vrms meets the safety requirements of the target application. Ensure compatibility with the specified operating temperature range and input current limits before procurement.
Selection Notes
Select this component when high gain and sensitivity are required for driving loads with low input currents. The Darlington structure makes it suitable for applications where standard phototransistor outputs may lack sufficient amplification. Consider the slower switching speeds inherent to Darlington pairs compared to standard transistors when designing timing-critical circuits.
Part Context
This component belongs to the family of general-purpose photodarlington optocouplers. It shares functional similarities with other industry-standard parts like the 4N29, offering a cost-effective solution for basic isolation needs. The SM suffix typically indicates a surface-mount or specific packaging variant within the manufacturer's lineup.
Replacement Considerations
Direct substitutes include the standard 4N29 series components. Verify pinout compatibility and ensure the replacement maintains the required 5300Vrms isolation rating and Darlington output characteristics.
