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Microchip Releases New Low-Power Vehicle Access Solution For Smart Keys
Devices Feature Open Immobilizer Protocol for Interoperability and Low Frequency Vector Techniques
for Man-in-the-Middle Counterattack Strategies
The industry’s lowest-power Passive Entry/Passive Start (PEPS) solution is now available from Microchip.
Microchip’s ATA5700 and ATA5702 are primarily intended for use in battery-powered applications such as smart keys (i.e. PEPS) 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 ultra-low power consumption, outstanding key localization accuracy and
unique built-in counter relay (“man-in-the-middle”) 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 new devices also feature excellent low frequency sensitivity, enabling convenience features
such as customized welcome lighting upon approaching the vehicle or automatic “walk-away locking” of the
vehicle - in a range up to 10 meters. The power consumption for this “always on feature” is industry leading,
tripling the battery lifetime in the highest sensitivity mode.
The devices offer the highest key localization accuracy in the market, which is critical to accurately distinguish
whether a key fob is located inside or outside the vehicle and to comply with accuracy requirements of insurance companies.
In addition, the devices contain an open-source, zero-cost license immobilizer protocol based on
AES-128 that enables interoperability, allowing large-volume customers to deploy second sourcing strategies.
“The fast-growing passive entry market is driven by an increased customer demand for convenience features - hands-free entry,
hands-free locking or even personalized welcome lighting,” said Matthias Kaestner,
vice president of Microchip’s Automotive business unit. “As these devices become more and more prevalent,
the need for enhanced security to prevent car theft is vital, and Microchip provides what our customers need.”
Both the ATA5700 and ATA5702 feature a 3D immobilizer, 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) to ensure a robust Ultra-High Frequency (UHF) link
that is highly immune to jammers and disturbers.
The company's Web site address is www.Microchip.com
[Reprinted with kind permission from Microchip - Release Date, 8th November, 2016]