Description
The Broadcom® ACPL-K43T is a single-channel, high-temperature, high-CMR, high-speed digital optocoupler in an eight-lead miniature footprint specifically used in the automotive applications. The ACPL-K44T is a dual-channel equivalent of the ACPL-K43T. Both products are available in the stretched SO-8 package outline designed to be compatible with standard surface-mount processes.
This digital optocoupler uses an insulating layer between the light-emitting diode and an integrated photo detector to provide electrical insulation between input and output. Separate connections for the photodiode bias and output transistor collector increase the speed up to a hundred times over that of a conventional photo-transistor coupler by reducing the base-collector capacitance.
Broadcom R2Coupler™ isolation products provide with reinforced insulation and reliability that deliver safe signal isolation, which is critical in automotive and high-temperature industrial applications.

Features
 High temperature and reliability low-speed digital interface for automotive applications
 Ultra-low drive for status feedback at IF = 0.8 mA or 1.5 mA
 30 kV/μs (typ.) high common-mode rejection at VCM = 1500V
 Compact, auto-insertable stretched SO8 packages
 Qualified to AEC Q100 Grade 1 test guidelines
 Wide operating temperature range: –40°C to +125°C
 High speed: 1 MBd
 Low propagation delay: 1 μs max. at IF = 10 mA
 Worldwide safety approval:
– UL 1577 approval, 5 kVRMS/1 min.
– CSA approval
– IEC/EN/DIN EN 60747-5-5

Applications
 Automotive IPM driver for DC-DC converters and motor inverters
 Status feedback and wake-up signal isolation
 CANBus and SPI communications interface
 High-temperature digital/analog signal isolation