Keep in mind that the specific details may vary depending on the manufacturer and the particular variant of the 1458 optocoupler. Always consult the datasheet from the manufacturer you're using for the most accurate information.
Minimize the trace length between the bypass capacitor and the VCCcap V sub cap C cap C end-sub GNDcap G cap N cap D pins of the optocoupler to ensure maximum noise immunity.
) to stabilize the high-speed output stage and filter out transient high-frequency rail noise. Functional Architecture and Operation
is most famously associated with the classic MC1458 / LM1458 Dual Operational Amplifier
: Supports data rates with a maximum propagation delay ( ) of 8 ns . Wide Power Supply Range : Operates on a VCCcap V sub cap C cap C end-sub
The component designation "1458" presents a significant ambiguity in electronics engineering, as it is historically associated with the LM1458 dual operational amplifier rather than any optocoupler. This paper first resolves this nomenclature conflict, then establishes a generalized methodology for interpreting optocoupler datasheets. Using the widely recognized 4N35 optocoupler as a representative case study, we analyze key parameters including Current Transfer Ratio (CTR), isolation voltage, rise time, and forward voltage. The paper concludes with a decision matrix for selecting optocouplers in common applications such as microcontroller isolation and solid-state relay driving.
These parameters represent the predictable performance metrics of the 1458 optocoupler under specific operational windows. Input Characteristics Typical 1.25 V, Maximum 1.65 V ( Reverse Current ( IRcap I sub cap R ): Typical 0.1 µA, Maximum 10 µA ( Junction Capacitance ( CJcap C sub cap J ): Typical 25 pF ( Output Characteristics Collector-Emitter Dark Current ( ICEOcap I sub cap C cap E cap O end-sub ): Typical 1.0 nA, Maximum 100 nA ( Collector-Emitter Breakdown Voltage ( BVCEOcap B cap V sub cap C cap E cap O end-sub ): Minimum 50 V ( Emitter-Collector Breakdown Voltage ( BVECOcap B cap V sub cap E cap C cap O end-sub ): Minimum 7.0 V ( Transfer Characteristics
If your part is an 8-pin SOIC or DIP high-speed logic gate optocoupler, this is the component you need. Manufacturer: Avago Technologies / Broadcom Key Features:
This family of optocouplers boasts several features that make them a preferred choice for designers:
| Feature | Description / Typical Value | Key Benefit | | :--- | :--- | :--- | | | Data rates up to 15 Mbit/s; typical t PHL /t PLH propagation delays are often as low as 8 ns . | Enables fast and reliable digital communication, suitable for high-speed data transmission. | | High Isolation Voltage | Ranges from 3,750 V rms up to 5,300 V rms , providing robust galvanic isolation. | Protects low-voltage control circuitry from high-voltage hazards and transients. | | TTL Compatibility | Logic output is fully compatible with Transistor-Transistor Logic (TTL) levels. | Allows for direct interfacing with standard digital logic families without extra level-shifting components. | | High Current Transfer Ratio (CTR) | For the HCPL-1458-500E , the CTR is > 500% at an input current (I F ) of 5 mA. | A high CTR means the output can be driven strongly with a very small input current, improving efficiency. | | High Common-Mode Transient Immunity (CMTI) | Minimum of 15 kV/µs for basic models; advanced models achieve up to 75 kV/µs . | Provides excellent immunity to electrical noise, ensuring stable performance in harsh industrial environments. | | Wide Operating Temperature | Typically from -40°C to +100°C , with some variants extending to -55°C to +100°C. | Guarantees reliable operation in demanding applications ranging from automotive to industrial. | | Dual-Channel Option | Some variants, like the HCNW1458, integrate two independent optocoupler channels in a single package. | Saves valuable board space and reduces component count for more compact designs. |
While exact specifications can vary between sub-models, the "1458" family is renowned for a common set of high-performance features. This table summarizes the key attributes you can expect:
, high-speed logic gate optocouplers like the 1458 typically follow this standard 8-pin layout: Input Side: Pins for the Anode and Cathode of the internal GaAsP LED. Output Side: cap V sub cap C cap C end-sub , Ground, and the Open Collector output. 3. Essential Design Considerations
resistor ensures reliable saturation while drawing minimal current. 2. Switch-Mode Power Supply (SMPS) Feedback Loop
Features a remarkably low propagation delay—typically around 35 ns at 10 kHz —enabling high-frequency data rates and precise signal timing.
Connect a current-limiting resistor to the (Pin 1) to set the correct input current from your microcontroller. Connect the Cathode (Pin 2) to your input ground. Connect VCCcap V sub cap C cap C end-sub
1458 Optocoupler Datasheet //free\\ Jun 2026
Keep in mind that the specific details may vary depending on the manufacturer and the particular variant of the 1458 optocoupler. Always consult the datasheet from the manufacturer you're using for the most accurate information.
Minimize the trace length between the bypass capacitor and the VCCcap V sub cap C cap C end-sub GNDcap G cap N cap D pins of the optocoupler to ensure maximum noise immunity.
) to stabilize the high-speed output stage and filter out transient high-frequency rail noise. Functional Architecture and Operation
is most famously associated with the classic MC1458 / LM1458 Dual Operational Amplifier 1458 optocoupler datasheet
: Supports data rates with a maximum propagation delay ( ) of 8 ns . Wide Power Supply Range : Operates on a VCCcap V sub cap C cap C end-sub
The component designation "1458" presents a significant ambiguity in electronics engineering, as it is historically associated with the LM1458 dual operational amplifier rather than any optocoupler. This paper first resolves this nomenclature conflict, then establishes a generalized methodology for interpreting optocoupler datasheets. Using the widely recognized 4N35 optocoupler as a representative case study, we analyze key parameters including Current Transfer Ratio (CTR), isolation voltage, rise time, and forward voltage. The paper concludes with a decision matrix for selecting optocouplers in common applications such as microcontroller isolation and solid-state relay driving.
These parameters represent the predictable performance metrics of the 1458 optocoupler under specific operational windows. Input Characteristics Typical 1.25 V, Maximum 1.65 V ( Reverse Current ( IRcap I sub cap R ): Typical 0.1 µA, Maximum 10 µA ( Junction Capacitance ( CJcap C sub cap J ): Typical 25 pF ( Output Characteristics Collector-Emitter Dark Current ( ICEOcap I sub cap C cap E cap O end-sub ): Typical 1.0 nA, Maximum 100 nA ( Collector-Emitter Breakdown Voltage ( BVCEOcap B cap V sub cap C cap E cap O end-sub ): Minimum 50 V ( Emitter-Collector Breakdown Voltage ( BVECOcap B cap V sub cap E cap C cap O end-sub ): Minimum 7.0 V ( Transfer Characteristics Keep in mind that the specific details may
If your part is an 8-pin SOIC or DIP high-speed logic gate optocoupler, this is the component you need. Manufacturer: Avago Technologies / Broadcom Key Features:
This family of optocouplers boasts several features that make them a preferred choice for designers:
| Feature | Description / Typical Value | Key Benefit | | :--- | :--- | :--- | | | Data rates up to 15 Mbit/s; typical t PHL /t PLH propagation delays are often as low as 8 ns . | Enables fast and reliable digital communication, suitable for high-speed data transmission. | | High Isolation Voltage | Ranges from 3,750 V rms up to 5,300 V rms , providing robust galvanic isolation. | Protects low-voltage control circuitry from high-voltage hazards and transients. | | TTL Compatibility | Logic output is fully compatible with Transistor-Transistor Logic (TTL) levels. | Allows for direct interfacing with standard digital logic families without extra level-shifting components. | | High Current Transfer Ratio (CTR) | For the HCPL-1458-500E , the CTR is > 500% at an input current (I F ) of 5 mA. | A high CTR means the output can be driven strongly with a very small input current, improving efficiency. | | High Common-Mode Transient Immunity (CMTI) | Minimum of 15 kV/µs for basic models; advanced models achieve up to 75 kV/µs . | Provides excellent immunity to electrical noise, ensuring stable performance in harsh industrial environments. | | Wide Operating Temperature | Typically from -40°C to +100°C , with some variants extending to -55°C to +100°C. | Guarantees reliable operation in demanding applications ranging from automotive to industrial. | | Dual-Channel Option | Some variants, like the HCNW1458, integrate two independent optocoupler channels in a single package. | Saves valuable board space and reduces component count for more compact designs. | ) to stabilize the high-speed output stage and
While exact specifications can vary between sub-models, the "1458" family is renowned for a common set of high-performance features. This table summarizes the key attributes you can expect:
, high-speed logic gate optocouplers like the 1458 typically follow this standard 8-pin layout: Input Side: Pins for the Anode and Cathode of the internal GaAsP LED. Output Side: cap V sub cap C cap C end-sub , Ground, and the Open Collector output. 3. Essential Design Considerations
resistor ensures reliable saturation while drawing minimal current. 2. Switch-Mode Power Supply (SMPS) Feedback Loop
Features a remarkably low propagation delay—typically around 35 ns at 10 kHz —enabling high-frequency data rates and precise signal timing.
Connect a current-limiting resistor to the (Pin 1) to set the correct input current from your microcontroller. Connect the Cathode (Pin 2) to your input ground. Connect VCCcap V sub cap C cap C end-sub
