Tiny Single Chip Passive Keyless Entry/Go Solution

Overview

The NCF29A1 is a very compact single chip solution, suited for automotive applications with combined vehicle immobilization and keyless entry/start functions. The device incorporates a Security Transponder, PKE LF interface, UHF Transmitter and RISC Controller on the same chip and requires only a few external components.

The device transponder operation is compatible with the Security Transponder family PCF7937/38/39. The Transponder circuitry does not require any battery supply and full operation is granted in case of a battery low condition. The device comes in a tiny 32 pin QFN Package demanding little board space (5 mm x 5 mm). The RISC Controller is powered by NXP's low power 16-Bit MICRO RISC KERNEL (MRK III). The device features 8 I/O ports allowing for up to eight command button inputs.

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Features

Single-chip Security Transponder and Keyless Entry solution with on-chip multi-channel UHF Transmitter (310-447 MHz, 868/915 MHz upon request)
PCF7938/39 Family compatible transponder operation
16 Bit RISC Architecture (MRK III)
Up to eigth command buttons
Low-power RISC programmable device operation
Programmable ASK/FSK modulation characteristics
EEPROM for extended data storage
High sensitive three axis (3D) LF front-end
Low power LF wake-up and data processing
Low power consumption for longlasting battery
Single Lithium cell operation, 1.8 V to 3.6 V
Highly integrated for minimum board space and low bill of materials
Highly compact HVQFN package
70% size reduction due to monolithic one-chip solution
Allows high design flexibility for car keys and any other wearables and portables
High sensitivity of the LF frontend with best-in-class stable low quiescent current
Longer Immobilizer range for more user friendly Immobilizer backup function and different placement of Immobilizer backup reader antenna
Ultra low power IC is also extending battery life by up to 40%
Usage of AES effectively hampers key cloning vehicle theft
Key Localization (within 5 cm) with the 3D LF interface using RSSI (receive signal strength indicator) over wide dynamic range

Target Applications

Passive Keyless Entry Go
Remote car management
Immobilizer

MoreLess

Features

Single-chip Security Transponder and Keyless Entry solution with on-chip multi-channel UHF Transmitter (310-447 MHz, 868/915 MHz upon request)
PCF7938/39 Family compatible transponder operation
16 Bit RISC Architecture (MRK III)
Up to eigth command buttons
Low-power RISC programmable device operation
Programmable ASK/FSK modulation characteristics
EEPROM for extended data storage
High sensitive three axis (3D) LF front-end
Low power LF wake-up and data processing
Low power consumption for longlasting battery
Single Lithium cell operation, 1.8 V to 3.6 V
Highly integrated for minimum board space and low bill of materials
Highly compact HVQFN package
70% size reduction due to monolithic one-chip solution
Allows high design flexibility for car keys and any other wearables and portables
High sensitivity of the LF frontend with best-in-class stable low quiescent current
Longer Immobilizer range for more user friendly Immobilizer backup function and different placement of Immobilizer backup reader antenna
Ultra low power IC is also extending battery life by up to 40%
Usage of AES effectively hampers key cloning vehicle theft
Key Localization (within 5 cm) with the 3D LF interface using RSSI (receive signal strength indicator) over wide dynamic range