The primary manufacturer is Broadcom Inc. , which acquired Avago Technologies. Avago itself had previously acquired the optocoupler business from Agilent Technologies and Hewlett-Packard (HP). Therefore, you will often see these parts branded as Broadcom, Avago, Agilent, or HP in the market.
| Parameter | Value | |-----------|-------| | Isolation Voltage (t = 1 min) | 5000 V_RMS | | Creepage Distance (min) | 7 mm | | Clearance (min) | 7 mm | | CTI (Comparative Tracking Index) | ≥ 175 |
Sends voltage feedback from the low-voltage output side back to the high-voltage PWM controller on the primary side while keeping the two stages isolated.
Design a physical "keep-out" zone or slot in the PCB substrate directly beneath the IC package between the input and output pins. Do not run any signal or power traces through this buffer zone. Bypass Capacitors: Place a ceramic bypass capacitor between Pin 8 ( VCCcap V sub cap C cap C end-sub ) and Pin 5 ( GNDcap G cap N cap D
Features. • 15 kV/µs Minimum Common. Mode Transient Immunity at. VCM = 1500 V (4503/0453). • High Speed: 1 Mb/s. • TTL Compatible. HCPL-1458 Avago - Xecor 1458 optocoupler datasheet
CTR=(ICIF)×100%CTR equals open paren the fraction with numerator cap I sub cap C and denominator cap I sub cap F end-fraction close paren cross 100 %
VF (from datasheet)=1.25 Vcap V sub cap F space open paren from datasheet close paren equals 1.25 V IF=10 mA=0.01 Acap I sub cap F equals 10 mA equals 0.01 A Using Ohm’s Law:
is frequently used in environments where noise sensitivity is high and reliable isolation is critical:
If you are currently designing or troubleshooting a circuit using the 1458 optocoupler, let me know: The and output voltage levels of your system. The primary manufacturer is Broadcom Inc
The unique hermetic sealing and high-gain characteristics of the HCPL-1458 make it suitable for specialized environments:
Offers exceptionally high common-mode transient immunity, with a minimum of 50 kV/μs, allowing reliable operation in noisy electrical environments. Isolation Voltage: Features a high isolation voltage of VISOcap V sub cap I cap S cap O end-sub Vrmscap V sub r m s end-sub , ensuring robust safety and galvanic isolation.
Online distributor websites (like Mouser, DigiKey) have parametric search tools that allow you to filter by these specifications to find a suitable alternative.
Datasheets for the HCPL-1458 typically highlight its ability to operate at high speeds with minimal power requirements. Therefore, you will often see these parts branded
If the HCPL-1458 or A1458 is unavailable due to its specialized, legacy, or obsolete status, engineers often cross-reference it with alternative high-speed 8-pin optocouplers:
This technical guide unpacks the device's architectural framework, core electrical parameters, and primary layout constraints. 1. Device Architecture & Functional Block Diagram
You can view technical parameters and search for the exact PDF on the ALLDATASHEET HCPL-1458 Search Page 2. Dual Operational Amplifier (MC1458 / LM1458)
: Connect to the high-gain photodetector for signal retrieval and isolation. Applications The
The 1458 is a dual-channel or specialized high-density optocoupler (also known as an optoisolator). It integrates light-emitting diodes (LEDs) optically coupled to photodetectors within a single package.