The HCPL-1458 (also referred to as the A1458) is a high-speed, logic-gate optocoupler primarily manufactured by Broadcom (formerly Avago/Agilent). It is designed to provide high-speed signal isolation between a circuit's input and output, protecting sensitive low-voltage components from high-voltage transients. Key Technical Specifications
The HCPL-1458 is characterized by its high common-mode rejection and speed, making it suitable for demanding industrial environments. Typical Value Description Data Rate Maximum signal transmission speed Propagation Delay 4 µs (typical) Signal delay time from input to output Isolation Voltage 3750 Vrms to 5300 Vrms Maximum rated isolation Operating Voltage (Vcc) 4.5 V to 5.5 V Standard logic-level supply voltage Operating Temperature -40°C to +85°C Range for industrial applications Current Transfer Ratio 60% (minimum) Ratio of output current to input current Pinout Configuration
The HCPL-1458 is typically housed in an SOP-8 or DIP-8 package. While specific internal diagrams vary by variant, a standard high-speed 8-pin optocoupler often follows this general layout:
Pin 1 & 4: Usually NC (No Connection) or specific anode/cathode pins. Pin 2: Anode (Input LED). Pin 3: Cathode (Input LED). Pin 5: GND (Output side). Pin 6: Vout (Output Signal). Pin 7: NC or Enable. Pin 8: Vcc (Supply Voltage). Common Applications
Industrial Control Systems: Maintaining electrical isolation between microcontrollers and high-power industrial equipment.
Switch-Mode Power Supplies (SMPS): Used in feedback loops to safely transmit regulation signals across isolation barriers.
Motor Drive Circuits: Protecting low-voltage control systems from the high voltages used in AC or DC motor drives.
Renewable Energy: Isolation in solar inverters and wind turbine controllers. Important Note on the "1458" Part Number
In the electronics industry, "1458" is also a very common designation for the MC1458 or LM1458. However, these are Dual Operational Amplifiers, not optocouplers. If your component is an 8-pin IC used for signal amplification rather than isolation, you are likely looking for the MC1458 Datasheet. MC1458 - STMicroelectronics
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
What is an Optocoupler? Before diving into the datasheet, let's quickly cover what an optocoupler (also known as an opto-isolator) is. An optocoupler is a component that allows two isolated circuits to communicate with each other through light. It consists of an LED (light-emitting diode) and a photodetector (such as a phototransistor or photodiode) separated by a dielectric material.
1458 Optocoupler Datasheet Overview The 1458 is a specific type of optocoupler, commonly used for isolating digital signals. Here's a general outline of what you might find in its datasheet:
Key Parameters:
Electrical Characteristics:
Absolute Maximum Ratings: This section lists the maximum values that the component can withstand without being damaged:
Typical Applications: The datasheet may also provide information on typical applications, such as:
Package Information: The datasheet will usually include information on the package type, pin configuration, and dimensions.
Interpreting the Datasheet: When reading the datasheet, pay attention to the specific characteristics and ratings that are relevant to your application. Make sure to check the units and conditions for each parameter. If you're unsure about any aspect, consult the manufacturer's documentation or seek guidance from a qualified engineer.
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.
, which is not an optocoupler. However, if you are looking for an optocoupler with a similar designation, the Go to product viewer dialog for this item.
is a high-performance component manufactured by Avago Technologies (now Broadcom). HCPL-1458 High-Gain Optocoupler The
is a hermetically sealed, high-gain optocoupler designed for reliable signal isolation. It combines a GaAsP LED with an integrated high-gain photodetector to provide electrical insulation between input and output circuits. Key Specifications & Features
High Performance: Optimized for high-speed and low-voltage operations. Voltage Supply ( VCCcap V sub cap C cap C end-sub
): Features a wide supply range, allowing for flexibility in various system designs. Power Consumption: Low input current ( IFcap I sub cap F ) requirements help reduce total drive power needs.
Isolation: Provides high isolation voltage, typically around 5300 Vrms, and high common-mode transient immunity (CMR) of 50 kV/µs.
Packaging: Commonly available in a compact SOP-8 or SOIC package style. Pin Configuration (Standard SOP-8) While pinouts can vary by manufacturer, the typically follows this configuration: Input Pins: Dedicated to the LED power supply and ground. 1458 optocoupler datasheet
Output Pins: Connect to the high-gain photodetector for signal retrieval and isolation. Applications The
is frequently used in environments where noise sensitivity is high and reliable isolation is critical:
Industrial Control Systems: Used for signal switching and motor control.
Power Supplies: Found in switching power supplies and DC-DC converters.
Communications: Applied in data communication systems and automotive electronics. Note on Potential Confusion If your project involves the MC1458 Dual Op-Amp Go to product viewer dialog for this item.
, note that it is an analog component with two μA741-style amplifiers
in one package. Some modern digital-to-analog converters, like the Go to product viewer dialog for this item.
, are designed with clock inputs that allow for a direct optocoupler interface for better isolation.
with other high-speed optocouplers, or were you specifically looking for the MC1458 Op-Amp Go to product viewer dialog for this item. details? LTC1458 Datasheet and Product Info - Analog Devices
Understanding the 1458 Optocoupler Datasheet: A Comprehensive Guide
The 1458 optocoupler is a type of optoelectronic device that combines a light-emitting diode (LED) and a phototransistor to provide electrical isolation between two circuits. This device is commonly used in applications where high voltage insulation is required, such as in power supplies, motor control circuits, and industrial automation systems. In this article, we will provide an in-depth analysis of the 1458 optocoupler datasheet, covering its features, specifications, and applications.
Overview of the 1458 Optocoupler
The 1458 optocoupler is a dual-channel device that consists of two independent optocouplers in a single package. Each channel consists of an infrared LED and a phototransistor, which are optically coupled to provide electrical isolation between the input and output circuits. The device is available in a variety of packages, including DIP-8, SMD-8, and SOP-8.
Key Features of the 1458 Optocoupler
The 1458 optocoupler datasheet highlights several key features that make this device suitable for a wide range of applications. Some of the key features include:
Specifications of the 1458 Optocoupler
The 1458 optocoupler datasheet provides a detailed list of specifications that define the device's performance and characteristics. Some of the key specifications include:
Applications of the 1458 Optocoupler
The 1458 optocoupler is widely used in a variety of applications where high voltage insulation and efficient signal transfer are required. Some of the common applications include:
How to Use the 1458 Optocoupler Datasheet
The 1458 optocoupler datasheet provides a wealth of information that can be used to design and develop applications that utilize this device. Here are some tips on how to use the datasheet:
Conclusion
The 1458 optocoupler datasheet provides a comprehensive overview of the device's features, specifications, and applications. By understanding the device's performance and characteristics, designers and engineers can develop applications that utilize the 1458 optocoupler to provide high voltage insulation and efficient signal transfer. Whether you're designing a power supply, motor control circuit, or industrial automation system, the 1458 optocoupler datasheet is an essential resource that can help you get the job done.
References
Appendix
The following appendix provides additional information on the 1458 optocoupler datasheet:
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. The HCPL-1458 (also referred to as the A1458
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:
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.
Medical Equipment: Ensuring patient safety through high-voltage galvanic isolation. Important Distinction: HCPL-1458 vs. MC1458 Single Channel, High Speed Optocouplers Technical Data
The HCPL-1458 (also known as the A1458) is a high-speed, hermetically sealed logic gate optocoupler originally manufactured by Avago Technologies (now Broadcom). It is primarily used for electrical isolation in high-reliability and industrial applications. Key Features
High-Speed Performance: 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
range of 3.0V to 5.5V, allowing flexibility for different logic levels.
High Noise Immunity: Provides high common-mode transient immunity (CMR) of at least 50 kV/µs.
Superior Isolation: Rated for an isolation voltage of 5300 Vrms. Low Power Consumption: Maximum supply current ( ICCcap I sub cap C cap C end-sub
) is approximately 1.2 mA, making it suitable for power-sensitive designs.
Hermetic Packaging: Available in an 8-pin hermetically sealed package (SOP-8 or similar), protecting internal components from environmental factors. Electrical Specifications Typical/Max Value Forward Current ( IFcap I sub cap F ) 20 mA (Max) Output Current ( ICcap I sub cap C ) Operating Temperature -55°C to +100°C Propagation Delay 35 ns at 10 kHz Common Applications
Industrial Control Systems: Protecting microcontrollers from high-voltage spikes and ground loops.
Telecommunications: High-speed digital signal switching and line receivers.
Medical Equipment: Ensuring electrical isolation for patient safety in diagnostic devices.
Power Supplies: Used as a feedback element in switched-mode power supplies (SMPS). Comparison Note
Be careful not to confuse the HCPL-1458 with the LM1458 or MC1458. While they share the "1458" number, the LM1458 is a Dual Operational Amplifier and does not provide optical isolation.
If you are looking for specific pinout diagrams or price availability from distributors like Broadcom or Utsource, let me know. LM1458/LM1558 Dual Operational Amplifier datasheet (Rev. D)
is most famously associated with the classic MC1458 / LM1458 Dual Operational Amplifier Isolation Voltage : The maximum voltage that the
. However, if you are strictly looking for an optocoupler, you are likely referring to the high-speed
(often colloquially called the A1458) manufactured by Avago (now Broadcom). STMicroelectronics
Because datasheets vary wildly based on the exact component you have in hand, official documentation and highly-rated repositories for both options are listed below. 1. High-Speed Optocoupler (HCPL-1458 / A1458)
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:
High-speed propagation, low power consumption, and high common-mode transient immunity (CMR). Datasheet Archive:
You can view technical parameters and search for the exact PDF on the ALLDATASHEET HCPL-1458 Search Page 2. Dual Operational Amplifier (MC1458 / LM1458)
If your part is a classic 8-pin analog amplifier (not an optical isolator), it is a dual op-amp derived from the industry-standard mu cap A 741 STMicroelectronics MC1458 - STMicroelectronics
) 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
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).
If one mistakenly searches for "1458 optocoupler," the correct workflow is:
Assuming your "1458 optocoupler" is a standard DIP-6, here is the pinout (identical to 4N35, PC817, and most general-purpose types):
Top View (Notch facing left or up)
---- Notch ----
| 1 o o 6 |
| 2 o o 5 |
| 3 o o 4 |
------------
Typical Wiring for Logic Isolation:
The PC1458 is an optically coupled isolator consisting of a Gallium Arsenide (GaAs) infrared emitting diode (IRED) optically coupled to a silicon phototransistor detector. It is housed in a standard 4-pin DIP (Dual In-line Package).
Author: Technical Analysis Division Date: October 2023
* Input side
V_IN ----|>|----+---- R_IN ---- GND
LED |
|
( ) Pull‑up resistor R_PULL (10 kΩ) to V_CC
|
+----> V_OUT (collector)
|
( ) Emitter to GND
| Parameter | Value | |-----------|-------| | Isolation Voltage (t = 1 min) | 5000 V_RMS | | Creepage Distance (min) | 7 mm | | Clearance (min) | 7 mm | | CTI (Comparative Tracking Index) | ≥ 175 |
These values determine the optocoupler’s suitability for reinforced isolation in medical or industrial power supplies.
In the world of electronics, isolation is paramount. Whether you are designing a switched-mode power supply (SMPS), a microcontroller interface for industrial machinery, or a safety circuit for a medical device, the need to separate high-voltage domains from low-voltage logic is non-negotiable. The unsung hero of this task is the optocoupler (also known as an optoisolator).
Among the sea of component numbers, "1458" appears frequently in search queries and parts lists. However, there is a critical distinction to make immediately: The "1458" is most famously a dual operational amplifier (specifically the MC1458 or LM1458), not a standard optocoupler. This confusion is common. Therefore, this article serves two purposes:
By the end of this guide, you will know exactly how to find, read, and apply the correct datasheet for your isolation needs.