Featuring an AES-128 immobilizer protocol stack, a 125 kHz LF receiver/transmitter, and a 32-bit unique device identification number, the 8-bit ATA5790N MCU targets passive entry and passive start car keys. The ultra-low power chip has the LF immobilizer function and a 3D LF receiver in a 5 x 7 mm package.
The IC provides 16 Kbytes of flash and a 2 Kbyte EEPROM. Within the 16 K flash, 14 Kbytes are available for the application software, while 2 kbytes are available for the immobilizer function. The MCU operates from -40 to 85C and takes just 50 μA with 125 kHz Sys_Clk, 70 μA in idle with 1 MHz Sys_Clk, and 0.8μA in power-down. (From $1.80 ea/10,000 – samples available now.)
by Jim Harrison
Atmel, USA , San Jose , CA
Sales 408-441-0311
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