The term "1458 optocoupler" usually refers to the HCPL-1458, a high-speed, hermetically sealed optocoupler featuring a 5300 Vrms isolation voltage and 50 kV/µs common-mode transient immunity. It is often confused with the MC1458/LM1458, which is a dual operational amplifier rather than an isolator. View technical details at UTSOURCE. MC1458 - STMicroelectronics
, allowing for seamless integration into both 3.3V and 5V logic systems. Low Drive Power : Requires low forward current ( cap I sub cap F
), which reduces the power consumption of the driving circuit. Hermetic Packaging : Typically housed in an SOP-8 hermetically sealed package
, which protects internal components from moisture and contaminants in harsh environments. TTL Compatibility
: The output is compatible with standard Transistor-Transistor Logic (TTL), simplifying its use with microcontrollers and digital circuits. Performance Characteristics Typical Value / Description Propagation Delay Supply Voltage ( cap V sub cap C cap C end-sub 3.0V to 5.5V Package Type SOP-8 (Hermetically Sealed) Output Type Open Collector Typical Applications The HCPL-1458 is frequently used for Microcontroller Interfacing
to protect sensitive MCUs from high-voltage spikes. Other common uses include: Isolated Line Receivers
: For high-speed data communication across different ground planes. Motor Control
: Providing safe isolation between low-voltage control signals and high-voltage power stages like IGBTs and MOSFETs Switching Power Supplies : Used in feedback loops to maintain isolation. Manufacturer Resources For full technical details, you can refer to the official HCPL-1458 Datasheet
provided by manufacturers like Broadcom (formerly Avago/Agilent). Heisener Electronics or a specific circuit example for this component? MC1458 - STMicroelectronics
The HCPL-1458 (often referred to simply as the 1458 optocoupler) is a high-speed, hermetically sealed logic gate optocoupler primarily manufactured by Broadcom (formerly Avago). It is specifically engineered for high-reliability applications, including industrial, aerospace, and medical systems where signal integrity and electrical isolation are critical. Key Specifications and Performance
The HCPL-1458 is known for its high-speed performance and robust isolation capabilities. Below are the typical parameters found in its datasheet: 1458 optocoupler datasheet
Propagation Delay: Typically 8 ns to 35 ns (depending on specific testing conditions and sub-variants like the HCPL-1458#060), allowing for high-frequency signal transmission.
Isolation Voltage: Provides a high insulation voltage of 5000 Vrms (or 3750 Vrms for certain packages like the standard 8-pin DIP).
Common Mode Rejection (CMR): Minimum of 15,000 V/μs at 1500 V peak, ensuring the device remains immune to high-voltage transients. Supply Voltage ( VCCcap V sub cap C cap C end-sub
): Operates within a range of 3.0V to 5.5V, making it compatible with standard TTL and CMOS logic levels.
Output Type: Open-collector output, which can handle voltages up to 20V. Pin Configuration (8-Pin DIP/SO-8)
The HCPL-1458 generally follows the standard high-speed optocoupler pinout: Description 1 No internal connection 2 Input LED anode 3 Input LED cathode 4 No internal connection 5 6 VOcap V sub cap O Output voltage (Open collector) 7 No internal connection (or sometimes VEcap V sub cap E 8 VCCcap V sub cap C cap C end-sub Positive supply voltage Typical Applications
Because of its hermetic sealing and high-speed operation, the 1458 is frequently used in:
Digital Logic Isolation: Protecting microcontrollers from high-voltage transients in industrial environments.
High-Speed Communication: Isolating line receivers and data transmission systems like RS-485 or CAN bus.
Power Supply Feedback: Providing isolated feedback in switching power supplies. The term "1458 optocoupler" usually refers to the
Medical Equipment: Ensuring patient safety through high-voltage galvanic isolation. Important Distinction: HCPL-1458 vs. MC1458 Single Channel, High Speed Optocouplers Technical Data
) is a high-performance, hermetically sealed optocoupler designed for high-speed digital isolation in demanding environments. Type: High-speed logic gate optocoupler. Key Specs: Speed: Typically 10 MBd (megabaud).
Isolation Voltage: Standard models offer around 1500V to 5300Vrms isolation.
Common Mode Rejection (CMR): High immunity to noise transients (often >50 kV/µs). Supply Voltage: Wide range, often 3.0V to 5.5V.
Packaging: Commonly found in DIP-8, DIP-16, or SOP-8 packages, sometimes with hermetic sealing for military or aerospace use.
Datasheet: You can find technical specifications on distributor sites like Alldatasheet or the manufacturer’s product page. 2. Other Components with "1458"
Because "1458" is a very common part number, ensure you aren't actually looking for one of these: MC1458 Dual Op-Amp Go to product viewer dialog for this item.
: One of the most famous chips with this number. It is a dual version of the classic 741 operational amplifier, used for general-purpose analog signal processing. LTC1458 12-Bit DAC
: A quad 12-bit digital-to-analog converter from Analog Devices. Its datasheet mentions an "optocoupler interface," which might be why it appeared in your search. Quick Verification Checklist: Does your part have 8 or 16 pins? (Likely the HCPL-1458 optocoupler Is it used for analog signal gain in a circuit? (Likely the MC1458 op-amp Is it in a larger SO-28 package? (Likely the LTC1458 DAC
Which of these specific 1458 components are you building into your project? AI responses may include mistakes. Learn more MC1458 - STMicroelectronics 1458 Optocoupler Datasheet — Summary Report 2
The HCPL-1458 is a high-speed, dual-channel logic gate optocoupler often manufactured by Broadcom (formerly Avago/Agilent). It is designed for applications requiring robust electrical isolation and fast data transmission, such as industrial control and telecommunications. Key Specifications According to technical data, the HCPL-1458 features: Channels: 2 unidirectional channels. Data Rate: Up to 10 MBd (10 Mbps).
Isolation: Typically 1500 VDC or 1500 Vrms isolation voltage. Output Type: Open collector with TTL-compatible logic. Supply Voltage ( VCCcap V sub cap C cap C end-sub ): Operates within a wide range of 3.0V to 5.5V.
Package: Commonly available in a hermetically sealed 16-DIP or SOP-8 package for high-reliability environments. Review: Pros & Cons HCPL-1458 Avago - Xecor
Here is the technical content for a 1458 Optocoupler Datasheet. Since "1458" is not a standard industry part number for an optocoupler (it is typically associated with the dual operational amplifier), this datasheet assumes the 1458 refers to a general-purpose phototransistor optocoupler (similar to a 4N35 or PC817 but with a unique in-house marking). For actual use, please verify the manufacturer (e.g., Siemens, Vishay, or a Chinese brand).
This table is non-negotiable. Exceed these values, and you release the magic smoke.
| 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 |
Expert Note: If your "1458 optocoupler" has a VCEO lower than 30V, it is not suitable for motor drives. If it is higher (e.g., 70V), it is likely a high-voltage variant like the 4N36.
Subject: Identification and Technical Analysis of the "1458" Component in Optocoupler Contexts Date: October 26, 2023 Status: Identification Required
The following specifications represent the typical characteristics of the PC1458 (and similar 4-pin DIP optocouplers like the PC817, which shares a nearly identical footprint and application).