Compact optocouplers save space safely

Devices require 40 to 50% less PCB real estate than a DIP-8 packaged alternative, while still meeting 8mm creepage and clearance requirements.

Avago Technologies has expanded of its family of high-speed dual-supply voltage digital CMOS optocouplers.

Avago's ACPL-W70L and ACPL-K73L digital CMOS stretched optocouplers operate at 3.3 and 5V at a minimum speed of 15Mbaud.

Moreover, these new optocouplers provide up to 5kV isolation voltage protection and are designed to achieve lower propagation delay (55ns maximum) and pulsewidth distortion (25ns maximum) with the additional glitch-free power-up feature.

This feature outputs low voltage logic during power loss and provides output logic that corresponds to the input voltage when the power supply recovers.

The ACPL-W70L/K73L series targets designers of power supply, industrial, consumer, and test and measurement applications.

The single-channel ACPL-W70L and two-channel ACPL-K73L come in SSO-6 and SSO-8 packages, respectively.

Each device requires 40 to 50% less PCB space than a DIP-8 packaged alternative, and meets 8mm creepage and clearance requirements.

Both can operate in a wide operating temperature range from -40 to +105C.

Moreover, the ACPL-W70L/K73L series incorporate the latest CMOS IC technology to achieve superior performance with very low power consumption.

As power scales down, the demand for lower supply voltage increases.

In the process of power supply migration, a growing number of equipment manufacturers are looking for devices that work at both 3.3 and 5V supply voltages.

In addition to supporting both 3.3 and 5V supply voltages, Avago's ACPL-W70L and ACPL-K73L are powered by low forward current of 4mA and consume very low current.

Avago's ACPL-W70L/K73L optocoupler series offers noninverting output as compared with the traditional inverting output which helps to reduce power consumption in the signal pattern with less than 50% duty cycle.

Avago's new optocouplers include high-speed LEDs and CMOS detector ICs.

Each detector incorporates an integrated photodiode, high speed transimpedance amplifier, and a voltage comparator with an output driver.

The ACPL-W70L/K73L optocouplers are ideal for digital fieldbus isolation, multiplexed data transmission, microprocessor system interface and DC/DC convertor applications.

The ACPL-W70L/K73L series meets international safety standards such as IEC/EN/DIN EN 60747-5-2, UL1577 and CSA for Reinforced Insulation.

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