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Avago Technologies has announced two miniature voltage/current-threshold-detection optocouplers for use in a range of industrial-control applications.

The ACPL-K370/K376 optocouplers are designed to detect AC/DC sources and convert the voltage to a logic interface across an optical coupling barrier to provide safe isolation in the electronically noisy environments found in industrial applications.

These voltage/current-sensing optocouplers are suitable for use in applications such as limit-switch sensors, low-voltage detectors, relay-contact monitors, relay-coil-voltage monitors and current sensors.

The ACPL-K370/K376 series utilises threshold-sensing input-buffer ICs that permit control of threshold levels over a range of input voltages up to 1,140V peak with a single external resistor.

Some of the benefits provided by the optocoupler series include a smaller stretched SO-8 (SSO-8) package that meets 8mm clearance and creepage requirements, and requires 30 per cent less printed-circuit-board space compared to dual-inline packages (DIP-8).

The input buffer of these optocouplers offers hysteresis for extra noise and switching immunity, a diode bridge for use with AC input signals and internal clamping diodes to protect the buffer and LED from a range of over-voltage and over-current transients.

With the addition of the ACPL-K370/K376 series, Avago can offer another SSO-8 package option in addition to existing DIP packages to provide customers with more optocoupler options for higher-voltage industrial applications.

The ACPL-K376 is a low-current version of the ACPL-K370.

To obtain lower-current operation, the ACPL-K376 uses a high-efficiency aluminum-gallium-arsenide LED, which provides higher light output at lower drive currents.

Avago Technologies

Avago Technologies is a leading supplier of analogue interface components for communications, industrial and consumer applications. By leveraging its core competencies in III-V compound and silicon semiconductor design and processing, the company provides an extensive range of analog, mixed signal and optoelectronics components and subsystems to approximately 40,000 end customers.

Backed by strong customer service support, the company's products serve four diverse end markets: industrial and automotive electronics, wired infrastructure, wireless communications, and consumer and computer peripherals. Avago has a global employee presence and heritage of technical innovation dating back 40 years to its Hewlett-Packard roots. Information about Avago is available on its website.

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