A1458 Optocoupler Datasheet [patched]
The A1458 (HCPL-A1458) is a specialized high-speed optocoupler designed to provide galvanic isolation for IGBT and Power MOSFET gate driving in industrial motor drives and power supplies. Featuring an open-collector output, it offers 35 ns propagation delay and a robust operating range of -40°C to +100°C for high-noise environments. Technical specifications can be reviewed in the datasheet from Farnell. HCPL-A1458 | In Stock - utsource
The (commonly referred to as the HCPL-1458) is a high-speed, logic-gate optocoupler designed for isolation in high-performance digital and power systems . It is primarily manufactured by brands such as Broadcom/Avago (formerly Agilent) . Key Technical Specifications
The A1458 is characterized by its high common-mode rejection and speed, making it suitable for noisy industrial environments .
Speed & Data Rate: Typically supports data rates up to 10–15 MBd .
Propagation Delay: Approximately 35–45 ns (typical), with a maximum of 8 ns for some high-speed variants .
Isolation Voltage: Rated for 3750 Vrms to 5300 Vrms depending on the specific variant and package .
Common Mode Rejection (CMR): Minimum of 15,000 V/µs (often reaching 50 kV/μs in newer models like the HCPL-1458) . Supply Voltage ( VCCcap V sub cap C cap C end-sub
): Operates between 3.0 V and 5.5 V, making it compatible with both 3.3V and 5V logic .
Output Type: Open Collector, allowing for flexible output voltage levels (up to 20V) and easy interfacing with TTL/CMOS logic . Pin Configuration (8-Pin DIP/SO-8)
While exact pinouts can vary by package style (e.g., 16-pin DIP versions also exist), the standard 8-pin configuration typically follows :
Input Side: Pins for Anode and Cathode of the internal GaAsP LED. Output Side: Pins for VCCcap V sub cap C cap C end-sub , Output ( VOcap V sub cap O ), and Ground ( GNDcap G cap N cap D Common Applications
Motor Control: High-speed gate driving for IGBTs and Power MOSFETs in industrial inverters . a1458 optocoupler datasheet
Digital Isolation: Ground loop elimination and signal isolation for TTL/CMOS high-speed logic .
Switching Power Supplies: Feedback isolation in SMPS and DC-DC converters .
Telecommunications: Used for high-speed digital interface isolation and line receivers . Substitute & Cross-Reference Parts
If the A1458 is unavailable, the following components are common functional alternatives: 6N137: A widely available 10MBd high-speed optocoupler .
HCPL-4506 / HCPL-0700: Often used as direct logic-output substitutes .
H11L1: A logic-gate optocoupler featuring a Schmitt trigger output for enhanced noise immunity .
For detailed performance curves and thermal derating, you can download the full technical data from Farnell or Alldatasheet . Single Channel, High Speed Optocouplers Technical Data
Power Transistor Isolation. Feedback Element in. Switched Mode Power. Supplies. Replaces Pulse Transformers. • Replaces Slow. HCPL-A1458 | In Stock | Utsource
H11L1 | Brief Description: Logic-gate optocoupler with Schmitt trigger output, ideal for interfacing with low logic circuits. HCPL-1458/ A1458 | In Stock - utsource
The A1458 (frequently referred to as the Go to product viewer dialog for this item.
) is a high-speed, logic-gate optocoupler designed by Broadcom (formerly Avago Technologies). It is specifically engineered for applications requiring robust galvanic isolation and high-speed signal transmission, such as industrial control systems and data communications. Core Specifications Current Transfer Ratio (CTR) CTR is the gain
The A1458 is characterized by its high-speed performance and low power requirements. Key electrical and performance specifications include: Specification Isolation Voltage 3750 Vrms to 5000 Vrms (depending on version) Data Rate Up to 15 MBd (typical) or 50 MBd (max depending on series) Propagation Delay ~20 ns to 45 ns Supply Voltage ( VCCcap V sub cap C cap C end-sub ) 4.5 V to 5.5 V Common Mode Rejection 15,000 V/μs (minimum) Output Type Open Collector Operating Temperature -40°C to +85°C or +100°C Pinout Configuration
The A1458 typically comes in an 8-pin DIP or SO-8 (SOP-8) surface-mount package. The standard 8-pin logic-gate optocoupler pinout is as follows: Pin 1: No Connection (NC) Pin 2: Anode (Input LED) Pin 3: Cathode (Input LED) Pin 4: No Connection (NC) Pin 5: Ground ( GNDcap G cap N cap D Pin 6: VOUTcap V sub cap O cap U cap T end-sub (Output Signal) Pin 7: VEcap V sub cap E (Enable Pin, sometimes used for logic control) Pin 8: VCCcap V sub cap C cap C end-sub (Supply Voltage) Key Features & Advantages
High Noise Immunity: With a minimum common-mode transient immunity of 15 kV/µs, it is highly resistant to electrical noise and voltage spikes.
Low Input Current: It operates efficiently with low input drive currents, typically around 13 mA, making it compatible with most standard logic families.
TTL Compatibility: The output logic levels are compatible with standard TTL and CMOS circuits, simplifying the interface with microcontrollers. Typical Applications
Because of its high speed and isolation rating, the A1458 is commonly found in:
Digital Isolation: Protecting sensitive microcontrollers from high-voltage transients in industrial control systems.
Power Supplies: Used in feedback loops for Switching Power Supplies (SMPS) to maintain isolation between primary and secondary stages.
Motor Drives: Isolating the control logic from high-power motor switching noise.
Communication Interfaces: Ideal for high-speed data links like RS-232, RS-485, or CAN bus isolation. Replacement and Equivalents
(often referred to by its full part number HCPL-A1458 ) is a high-speed logic gate optocoupler manufactured by Broadcom (formerly Avago/Agilent). Designed for high-performance industrial and digital logic isolation, it is frequently used to protect low-voltage microprocessors from high-voltage transients in electrically "noisy" environments. 1. Key Technical Specifications Detailed A1458 Optocoupler Datasheet Analysis To use any
The A1458 is characterized by its speed and high noise immunity. Below are the primary technical parameters found in the HCPL-1458 datasheet Maximum Data Rate , making it suitable for high-speed digital communication. Propagation Delay : Approximately (typical), ensuring fast signal response times. Isolation Voltage : Rated at (standard) or up to depending on the specific variant/package. Common Mode Rejection (CMR) : Minimum of
, which allows the device to maintain signal integrity even in environments with severe electromagnetic interference. Supply Voltage ( cap V sub cap C cap C end-sub : Operates between 4.5 V and 5.5 V , compatible with standard TTL and CMOS logic levels. Output Type Open Collector
, which provides flexibility for level-shifting applications by using an external pull-up resistor. 2. Pinout and Connection Diagram The A1458 typically comes in an 8-pin SOP or DIP
package. While you should always verify with the official diagram from Broadcom's technical data
, the standard 8-pin high-speed logic configuration is as follows: Description No Connection Anode of the input LED Cathode of the input LED No Connection Ground for the output stage cap V sub cap O Output signal (Open Collector) cap V sub cap B Base connection (often N/C in specific variants) cap V sub cap C cap C end-sub Supply Voltage (4.5V – 5.5V)
Note: A 0.1 µF bypass capacitor must be connected between pins 5 and 8 to ensure stable operation. 3. Common Applications
Because of its high speed and robust isolation, the A1458 is a staple in several critical industries: Optocouplers and Opto-Isolators - Broadcom Inc.
Current Transfer Ratio (CTR)
CTR is the gain of an optocoupler: (I_C / I_F) * 100%. The A1458 offers multiple rank options:
| Rank | CTR Min (%) | CTR Max (%) | Conditions | |------|-------------|-------------|-------------| | A | 50 | 150 | I_F = 5 mA, V_CE = 5V, Ta=25°C | | B | 80 | 240 | I_F = 5 mA, V_CE = 5V, Ta=25°C | | C | 130 | 400 | I_F = 5 mA, V_CE = 5V, Ta=25°C | | D | 200 | 600 | I_F = 5 mA, V_CE = 5V, Ta=25°C |
Selecting CTR rank: For digital logic interfaces (e.g., 5V to 3.3V), ranks A or B are sufficient. For analog applications or low I_F drive (e.g., 1 mA from a battery-powered MCU), ranks C or D provide higher sensitivity.
Detailed A1458 Optocoupler Datasheet Analysis
To use any component effectively, you must understand its absolute maximum ratings and electrical characteristics. Below is a distilation of the official a1458 optocoupler datasheet.