(often referred to simply as the 1458 optocoupler) is a high-performance, hermetically sealed high-speed optocoupler manufactured by Broadcom (formerly Avago/Agilent). It is designed specifically for applications requiring reliable signal isolation in harsh environments, such as industrial control and medical equipment. 1. Key Specifications & Performance High-Speed Operation: Features a propagation delay of approximately 35 ns, making it suitable for fast digital logic. Wide Supply Voltage ( cap V sub cap C cap C end-sub Operates across a range of 3.0V to 5.5V , allowing flexibility for both legacy 5V systems and modern 3.3V logic. Low Input Drive: Designed with a "Low cap I sub cap F " feature, meaning it requires minimal current from a microcontroller's GPIO to trigger. Common Mode Rejection (CMR): Provides high transient immunity (up to 50 kV/μs), which protects signals from high-frequency noise. Hermetic Sealing: Packaged in a hermetically sealed SOP-8 to protect internal components from moisture and environmental contaminants. 2. Pin Configuration (SOP-8) While you should always verify with a specific manufacturer's PDF , 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 When integrating the 1458 into your circuit, pay close attention to these parameters found in the Vishay datasheet guidelines Current Transfer Ratio (CTR): Even for high-speed logic gates, ensure the input current ( cap I sub cap F ) is sufficient to drive the output stage. Open Collector Output: This device often requires an external pull-up resistor on the output pin to interface correctly with digital logic. Isolation Voltage ( cap V sub i s o end-sub Rated for up to cap V sub r m s end-sub , ensuring safety between high-voltage power stages and low-voltage control circuits. 4. Typical Applications Isolated Data Acquisition: Protecting sensitive measurement systems from noisy ground loops. Motor Control: Providing feedback loops for motor drives while isolating high-voltage power stages. Inverter Circuits: Used in renewable energy systems like solar or wind inverters. Ovaga Technologies or a list of equivalent components if the 1458 is unavailable in your region?
is most famously associated with the classic MC1458 / LM1458 Dual Operational Amplifier . 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
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 (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) 1458 optocoupler datasheet
) 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 Overview The 1458 optocoupler is a high‑speed, transistor‑output device widely used for signal isolation in digital and low‑power analog circuits. Below is a concise yet comprehensive datasheet‑style summary.
Key Electrical Characteristics | Parameter | Symbol | Typical Value | Unit | Conditions | |-----------|--------|---------------|------|------------| | Forward Current (IF) | IF | 20 | mA | IF = 20 mA , VF = 1.2 V | | Forward Voltage (VF) | VF | 1.2 | V | IF = 20 mA | | Collector‑Emitter Voltage (VCE) | VCE | 80 | V | IC = 0 mA | | Collector Current (IC) | IC | 50 | mA | VCE = 80 V | | CTR (Current Transfer Ratio) | CTR | 100 % ± 20 % | % | IF = 20 mA , VCE = 5 V | | Rise Time (tr) | tr | 3 | µs | IF = 20 mA | | Fall Time (tf) | tf | 3 | µs | IF = 20 mA | | Isolation Voltage | VISO | 5000 | Vrms | 1 min, 60 Hz | | Operating Temperature Range | TOP | –40 to +85 | °C | – | | Storage Temperature Range | TS | –55 to +150 | °C | – | (often referred to simply as the 1458 optocoupler)
Pin Configuration | Pin | Function | Description | |-----|----------|-------------| | 1 | Anode | LED anode; forward‑biased when input signal is present | | 2 | Cathode | LED cathode; completes input circuit | | 3 | Collector| Phototransistor collector; output pulled up to VCC | | 4 | Emitter | Phototransistor emitter; grounded or tied to a reference |
Typical Application Circuit * Input side V_IN ----|>|----+---- R_IN ---- GND LED | | ( ) Pull‑up resistor R_PULL (10 kΩ) to V_CC | +----> V_OUT (collector) | ( ) Emitter to GND
Operation: When V_IN exceeds VF , the LED conducts, generating infrared light that turns on the internal phototransistor. The collector voltage drops, producing a low‑level logic output at V_OUT . the LED conducts
Performance Graphs (described)
CTR vs. IF: Linear rise from ~70 % at 5 mA to ~120 % at 30 mA. Switching Waveforms: Rise/fall times both ~3 µs, suitable for up to ~100 kHz digital signals.