: High-speed, low-power logic gate optocouplers from Broadcom. 6N137 / Go to product viewer dialog for this item.
Part numbers change, and manufacturers sometimes discontinue components. For the "1458" optocoupler, you have a few avenues to explore for alternatives:
Thanks to its fast switching times, high noise rejection, and robust electrical insulation, the HCPL-1458 is widely deployed across specialized electronics:
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| Parameter | Symbol | Typical Value (4N35) | | :--- | :--- | :--- | | Forward Current (LED side) | IF | 60 mA | | Reverse Voltage (LED) | VR | 6 V | | Collector-Emitter Voltage | VCEO | 30 V | | Emitter-Collector Voltage | VECO | 7 V | | Power Dissipation (Output) | PC | 150 mW | | Operating Temperature | TOPR | -55°C to +100°C | 1458 optocoupler datasheet
If you are looking to purchase, I can help you find distributors for the HCPL-1458. If you'd like, Single Channel, High Speed Optocouplers Technical Data
The underlying magic of the HCPL-1458 lies in its split-architecture design: HCPL-1458 Avago - Xecor
Adhering to the absolute maximum ratings in the is crucial to prevent permanent damage to the device: Storage Temperature: -55°C to +125°C Operating Temperature: -40°C to +85°C Supply Voltage ( VCCcap V sub cap C cap C end-sub ): 0 to 7.0 V Input Current ( IINcap I sub cap I cap N end-sub ): Low-level currents specified for logic inputs. Output Voltage ( VOcap V sub cap O ): Max 7.0 V. Applications of the HCPL-1458 Optocoupler
Provides a high insulation voltage of 5000 Vrms (or 3750 Vrms for certain packages like the standard 8-pin DIP). For the "1458" optocoupler, you have a few
The component is primarily housed in a standard package or a hermetic DIP-8 variant for high-reliability systems. The layout minimizes cross-talk while separating the input (emitter) and output (detector) pins: Pin Number Description Pin 1 Input LED Positive Terminal Pin 2 Input LED Negative Terminal Pin 3 No Connection (internal isolation space) Pin 4 No Connection or optional photodetector base Pin 5 Ground connection for the output stage detector Pin 6 VOUTcap V sub cap O cap U cap T end-sub
By providing a comprehensive overview of the 1458 optocoupler datasheet, this article aims to help designers and engineers understand the device's features, specifications, and applications, and to provide a valuable resource for designing and developing applications that utilize this device.
Provides high immunity to noise, crucial for noisy industrial environments.
This article will break down everything you need to know about the HCPL-1458 optocoupler datasheet, interpreting its specifications, pinout, and practical applications. What is the ? Go to product viewer dialog for this item. Can’t copy the link right now
Operating the component beyond these limits can cause permanent damage to the device. These specifications are typically rated at an ambient temperature ( TAcap T sub cap A ) of 25°C unless specified otherwise. -55°C to +125°C Operating Temperature Range: -40°C to +85°C Isolation Voltage ( VISOcap V sub cap I cap S cap O end-sub ): 3750 VRMScap V sub cap R cap M cap S end-sub VRMScap V sub cap R cap M cap S end-sub (1-minute rating, depending on suffix/manufacturer) Input Diode (Per Channel) Forward Current ( IFcap I sub cap F ): 25 mA Peak Forward Current ( IF,peakcap I sub cap F comma p e a k end-sub ): 50 mA (with brief pulse width) Reverse Voltage ( VRcap V sub cap R ): 5 V Output Detector (Per Channel) Output Current ( IOcap I sub cap O ): 8 mA Supply Voltage ( VCCcap V sub cap C cap C end-sub
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit | | :--- | :---: | :--- | :---: | :---: | :---: | :---: | | | | | | | | | | Forward Voltage | $V_F$ | $I_F = 20 \text mA$ | - | 1.2 | 1.4 | V | | Reverse Current | $I_R$ | $V_R = 4 \text V$ | - | - | 10 | $\mu A$ | | Output | | | | | | | | Collector Dark Current | $I_CEO$ | $V_CE = 20 \text V$ | - | - | 100 | nA | | Transfer Characteristics | | | | | | | | Current Transfer Ratio | CTR | $I_F = 5 \text mA, V_CE=5\textV$ | 50* | - | - | % | | Saturation Voltage | $V_CE(sat)$ | $I_F = 20 \text mA, I_C=1\textmA$ | - | 0.1 | 0.2 | V | | Switching Times | | | | | | | | Rise Time | $t_r$ | $V_CC=5\textV, I_C=2\textmA$ | - | 4 | 18 | $\mu s$ | | Fall Time | $t_f$ | $R_L=100 \Omega$ | - | 3 | 18 | $\mu s$ |
In audio systems or sensor networks, two circuits might have different ground potentials. Connecting them directly burns traces. Placing an optocoupler between the sensor's ground and the microcontroller's ground breaks the loop while passing data.
: Features a minimum common-mode rejection (CMR) rating of , filtering out quick spikes in voltage.
The Current Transfer Ratio is the most critical parameter when designing with the 1458 optocoupler. It functions similarly to the DC current gain ( hFEh sub cap F cap E end-sub ) of a standard bipolar transistor.
This table is non-negotiable. Exceed these values, and you release the magic smoke.