Microchip Technology MCS3122-I/ST

Description
The MCS3122 is an advanced KEELOQ® technology encoder designed for Remote Keyless Entry (RKE) applications. It features a programmable 32-bit serial number, 128-bit crypt key, and 160/192-bit transmission code length. The device operates from 2.0 to 3.7V and has three switch inputs, seven functions, and one active-low LED drive. The RF section supports configurable bit rate, modulation (FSK and OOK), and data modulation (PWM and Manchester).

Features
Advanced KEELOQ® technology
Programmable 32-bit serial number and seed transmissions
AES-128 block cipher
Programmable 128-bit crypt key
160/192-bit transmission code length
32-bit unencrypted portion
128-bit encrypted, code hopping portion
32-bit authorization check (optional)
2.0 to 3.7V operation
Three switch inputs
Seven functions available
One active-low LED drive
Configurable maximum code word
Configurable bit rate
Configurable modulation (FSK and OOK)
Configurable data modulation (PWM and Manchester)
Button inputs with internal pull-up resistors

Applications
Automotive RKE systems
Automotive alarm systems
Gate and garage door openers
Home security systems
Security and safety sensors
Remote control
Remote keypad
Wireless sensors