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We offer traditional Remote Keyless Entry (RKE), Passive Entry Passive Start (PEPS) and immobilizer car access solutions. RKE uses key fob push-button access, while PEPS enables a more advanced hands-free interaction with the vehicle. PEPS provides locking, unlocking and engine start/stop functionality over high-security channels without any manual action with the key fob. Individual key fobs can be customized for drivers, adjusting seat and mirror positions, car's infotainment settings and more. PEPS allows an autonomous and convenient way to enter and start the vehicle while maintaining a high level of safety and security. Both RKE and PEPS solutions work with immobilizer technology enhancing security and providing dead-battery fob access.

Key Features


Complete Product Offering

You can create your own dedicated designs whether you choose our low-power transmitter IC family, receiver IC family, or microcontroller family. Our broad product scope includes dedicated RF transmitters, receivers and transceivers, as well as integrated RF, LF, and AVR® microcontrollers to meet all your design needs. Our newest receivers offer even better integration and sensitivity to lower your application costs.

Highly Secure Solutions 

Our automotive safety portfolio features extremely secure PEPS solutions with a bi-directional RF link and dedicated LF wake-up channel. All our new car access products are based on the AES-128 encryption standard for maximum security.

Open Standards 

Our open source AES-128 immobilizer protocol stack eliminates the problems that prevent car manufacturers from adopting multi-vendor sourcing strategies and gives you the freedom to choose components that best fit your needs.

Car Access Products

View All Parametrics
Product Status 5K Pricing TempNo Range (deg C) Crypto Engine Operating Voltage (Vcc) Embedded µc Flash Size Packages
ATA5279C In Production $3.47 48/VQFN
ATA5291 In Production Call for pricing 48/VQFN
ATA5700 In Production Call for pricing -40 - 85 2.0 to 4.2 38/VQFN
ATA5702 In Production Call for pricing -40 - 85 2.0 to 4.2 38/VQFN
ATA5723C In Production Call for pricing -40 - 105 4.5 to 5.5 Please call for package information
ATA5724C In Production Call for pricing -40 - 105 4.5 to 5.5 Please call for package information
ATA5728C In Production Call for pricing -40 - 105 4.5 to 5.5 Please call for package information
ATA5745C In Production Call for pricing -40 - 105 2.7 to 3.3 or 4.5 to 5.5 24/VQFN
ATA5746C In Production Call for pricing -40 - 105 2.7 to 3.3 or 4.5 to 5.5 Please call for package information
ATA5749 In Production Call for pricing Please call for package information
ATA5749C In Production $1.08 10/MSOP
ATA5756 In Production Call for pricing Please call for package information
ATA5757 In Production Call for pricing Please call for package information
ATA5771C In Production Call for pricing 24/VQFN
ATA5773C In Production Call for pricing 24/VQFN
ATA5774C In Production Call for pricing 24/VQFN
ATA5780N In Production Call for pricing Yes 32/VQFN
ATA5781 In Production Call for pricing Yes 32/VQFN
ATA5781N In Production Call for pricing Yes 32/VQFN
ATA5782 In Production Call for pricing Yes 20 KByte 32/VQFN
ATA5783 In Production Call for pricing Yes Please call for package information
ATA5795C In Production Call for pricing -40 - 85 AES Yes 8 KByte Please call for package information
ATA5823 In Production Call for pricing -40 - 105 2.15 to 3.6 or 4.4 to 5.25 Please call for package information
ATA5824 In Production Call for pricing -40 - 105 2.15 to 3.6 or 4.4 to 5.25 Please call for package information
ATA5830 In Production Call for pricing Yes 6 KByte 32/VQFN
ATA5830N In Production Call for pricing Yes 6 KByte 32/VQFN
ATA5831 In Production Call for pricing Yes 20 KByte 32/VQFN
ATA5832 In Production Call for pricing Yes Please call for package information
ATA5833 In Production Call for pricing Yes 32/VQFN
ATR4251C In Production $1.43 -40 - 105 20/TSSOP, 24/VQFN
ATR4252C In Production Call for pricing -40 - 105 7-11 28/VQFN
ATR4253C In Production Call for pricing -40 - 105 16/VQFN
T5750C In Production Call for pricing -40 - 125 2.0 to 4.0 8/MSOP
T5753C In Production $1.24 8/MSOP
T5754C In Production Call for pricing 8/MSOP