A1458 Optocoupler Datasheet [updated]

Exceeding any of these values will permanently damage the A1458.

The (also commonly referred to by its full part number HCPL-1458 or HCNW1458 ) is a high-speed, high-performance optocoupler primarily used for logic gate isolation and power transistor driving. Known for its exceptional speed and high common-mode rejection, it is a staple in industrial environments where electrical noise can interfere with sensitive control signals. 1. Key Features and Specifications

: A high-speed optocoupler with a Totem Pole (TSR) output, often used for memory testing. A1458 Optocoupler Datasheet

For linear feedback in power supplies, choose a narrow CTR range (e.g., B rank) to minimize loop gain variation. For digital isolation, any rank works as long as you account for the minimum CTR at end-of-life (which typically degrades 20-30% over 10 years).

(formerly Avago Technologies). It is designed for high-performance signal isolation in demanding industrial and automotive environments where rapid switching and robust noise immunity are critical. Key Specifications & Features Exceeding any of these values will permanently damage

| Pin Number | Name | Description | |------------|-------------|--------------------------------------------------| | 1 | Anode (A) | Positive terminal of the internal infrared LED. | | 2 | Cathode (C) | Negative terminal of the internal infrared LED. | | 3 | Emitter (E) | Emitter terminal of the phototransistor. | | 4 | Collector (C)| Collector terminal of the phototransistor. |

| Parameter | Symbol | Value | Unit | |-----------|--------|-------|------| | Forward Current (LED) | IF | 50 | mA | | Peak Forward Current (1 µs pulse) | IFP | 1 | A | | Reverse Voltage (LED) | VR | 6 | V | | Collector-Emitter Voltage | VCEO | 35 | V | | Emitter-Collector Voltage | VECO | 6 | V | | Collector Current | IC | 50 | mA | | Isolation Voltage | VISO | 5000 | Vrms | | Operating Temperature | TOPR | -55 to +110 | °C | | Current Transfer Ratio (CTR) | CTR | 50–600 (depending on grade) | % | For digital isolation, any rank works as long

: Battery management and onboard chargers requiring high reliability. Switching Power Supplies : Feedback loops and control circuit isolation. Design Considerations Package Type : Typically available in

ANODE |1 4| COLLECTOR CATHODE|2 3| EMITTER ‾‾‾‾