PCF7946AT /SO-14 NXP

Транспондер для системи захисту автомобіля

Security Transponder plus Remote Keyless Entry, HITAG2
Features •  Compatible with Security Transponder , PCF7936AS.•  Rolling Code Generator for keyless entry •  14-pin SO packageTransponder•  64/32 bit mutual authentication •  32 bit unique device identification number •  Fast authentication, 39ms •  48 bit Secret Key •  128 bit user memory (EEPROM) •  EEPROM read/write in cipher mode •  EEPROM read/write protection capability •  Excellent sensitivity in read and write modeCode Hopping Generator •  Four user buttons (15 + 1 commands) •  LED acknowledgment of transmission •  42 bit unidirectional code hopping •  48 bit Remote Secret Key •  114 bit message with run-in, device identification,function code, terminator and parity bits •  Automatic code synchronisation via transponde r•  Programmable data rate and frame repetition rate •  Clock input to support external data rate reference •  Manchester encoding •  Low tolerance on-chip RC oscillator (< ±10%) •  Battery low indication •  Single cell operation (2.0V to 3.6V) •  Low power consumption(ACTIVE: 0.3 mA, POWER DOWN: 300nA)