Low-power PEPS solution features 3D immobiliser

Article By : Microchip Technology

The ATA5700 and ATA5702 enable features such as automatic “walk-away locking” of the vehicle in a range up to 10 metres.

Microchip Technology's new passive entry/passive start (PEPS) solution, ATA5700 and ATA5702, are primarily intended for use in battery-powered applications such as smart keys and complementary car access via mobile devices, smartphones and wearables where the power consumption is one of the key requirements.

Key benefits of the new devices include low power consumption, key localisation accuracy and built-in counter relay attack protection measures. Car theft based on relay attacks of vehicles equipped with a PEPS system is becoming one of the top security concerns of automakers. The two new devices have a unique built-in Low Frequency (LF) vector calculation unit that allows customers to implement effective relay attack countermeasures at no additional cost.

The ATA5700 and ATA5702 also feature low frequency sensitivity, enabling convenience features such as customised welcome lighting upon approaching the vehicle or automatic “walk-away locking” of the vehicle–in a range up to 10 metres. The power consumption for this “always on feature” triples the battery lifetime in the highest sensitivity mode. In addition, the devices contain an open-source, zero-cost license immobiliser protocol based on AES-128 that enables interoperability, allowing large-volume customers to deploy second sourcing strategies.

Both the ATA5700 and ATA5702 feature a 3D immobiliser, 3D high-sensitivity LF receivers, digital processing unit, 128-bit crypto engine, LF vector calculation unit and a microcontroller. The ATA5702 is enhanced with a built-in RF transmitter fractional Phase-Locked Loop (PLL), ensuring Ultra-High Frequency (UHF) link that is highly immune to jammers and disturbers.

The ATA5700 and ATA5702 are in production today and available now starting at ₹199.99 ($3.00) in 10K quantities. Both devices come in the 5mm x 7mm QFN package with wettable flanks.