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Our Passive Entry Pass Start (PEPS) system enables hands-free interaction with the vehicle. It allows the driver to lock or unlock the vehicle doors and to start or stop the vehicle engine without performing any manual action either with the key fob or a mechanical key. Individual key fobs can be customized for drivers, adjusting seat and mirror positions automatically and setting the car's infotainment system settings. Although the key fob can include a conventional Remote Keyless Entry (RKE) button, PEPS allows a more natural and convenient way to enter and start the vehicle while maintaining a high level of safety and security.

In a bi-directional PEPS system, the key fob and the vehicle module both contain transceivers that communicate wirelessly to detect each other. The module in the vehicle continually sends out encoded messages and it responds when the key fob is in range. If the encrypted messages are correct, they identify the vehicle and key fob to each other and the door opens, allowing the car to start. A traditional uni-directional RKE PEPS can also be implemented with our solutions.

 

Solutions


Microcontroller (MCU) + Immobilizer + 3D LF Receiver


The ATA5700/ATA5702 is a highly integrated, ultra-low power car access controller for PEPS and RKE applications, featuring an embedded AVR® 8-bit microcontroller in a single QFN 38 package. The device includes a highly sensitive 3D Low Frequency (LF) receiver, an immobilizer front end, and an Ultra-High Frequency (UHF) Amplitude Shift Keying (ASK)/Frequency Shift Keying (FSK) Radio Frequency (RF) transmitter. It combines ultra-low power LF technology with outstanding RF performance.

  • ATA5700 – 3D LF receiver, immobilizer and UHF transmitter

LF Driver


The ATA5291 is an LF antenna driver device for PEPS systems. It can drive up to eight low-frequency antennas (coils) to provide a wake-up and initialization channel to the key fob. Each driver is programmable up to a peak current of 1A (independent of battery voltage) and adjustable in 18 steps.

  • ATA5291 – LF antenna driver device for PEPS systems

RF Transceiver


The ATA5833 is a highly integrated, low-power UHF ASK/FSK RF transceiver with an integrated AVR® microcontroller, an RF front end and a digital baseband. The product is designed for the ISM frequency bands in the ranges of 310 MHz to 318 MHz, 418 MHz to 477 MHz and 836 MHz to 956 MHz. The external part count is kept to a minimum due to the very high level of integration in this device. It combines outstanding RF performance with highly sophisticated baseband signal processing to easily implement robust wireless communication.

  • ATA5833 – UHF ASK/FSK transceiver

Microcontrollers and Digital Signal Controllers


We offer the broadest portfolio of automotive-grade 8-, 16- and 32-bit microcontrollers (MCUs) and Digital Signal Controllers (DSCs) in the industry. With Core Independent Peripherals and multiple connectivity and package options to choose from, you will surely find a device that meets your embedded control system’s needs.

  • PIC18F26K83 – 28-pin, low-power, high-performance MCU with CAN technology
  • dsPIC33EV128GM102 – 16-bit, 5V DSC with PWM, SENT, CAN, op amps and advanced analog features
  • dsPIC33CK256MP502 – 16-bit high-performance DSC with integrated analog, CAN FD and functional safety features
  • PIC32MZ1024EFF144 – 32-bit MCU with FPU, audio and graphics interfaces, Hi-Speed USB, Ethernet and advanced analog

CAN Transceivers


Our CAN transceivers includes CAN 2.0, CAN Flexible Data-Rate (CAN FD), and CAN Partial Networking (CAN PN) transceivers and support the newest CAN standards, ISO 11898 2/5/6, ISO 11898-2:2016 and SAE J2962-2. Features include various wake-up functionalities and exceptional EMC performance even without a common-mode choke. We also offer the industry’s first AEC-Q100 Grade-0 (150°C) qualified CAN transceiver family.

  • ATA6562 – High-speed CAN FD transceiver with standby and silent mode and WUP
  • MCP2561FD – High-speed CAN FD transceiver with standby mode and SPLIT pin
  • ATA6570 – High-speed CAN FD transceiver with Partial Networking

Voltage Regulators


Our basic power management solutions include several automotive-grade linear and switched voltage regulators. Linear regulators feature low dropout voltages, ultra-low quiescent currents, wide input voltage ranges, load dump and reverse batter protection. Switching regulators support buck, boost, buck-boost and SEPIC designs from 100 mA to 12A output currents.

  • MAQ5280 – High-performance, low-dropout regulator, 25 mA, 120V, Adjustable Vout from 1.215 to 5V.
  • MCP1790 – 30V, 70 mA, load dump protected linear voltage regulator
  • MCP1755 – 300 mA, 16V, high-performance LDO

Development Tools