MCS3142-I/ST Microchip

MCS3142 MCS3142 Dual KEELOQ Technology Encoder Data Sheet Features Overview: Typical Applications: MCS3142 is ideal for Remote Keyless Entry (RKE) SECURITY applications. These applications include: Ultimate KEELOQ Technology: Automotive RKE Systems - Programmable 32-bit serial number Automotive Alarm Systems - AES-128 block cipher Gate and Garage Door Openers - Programmable 128-bit crypt key Home Security Systems - Timekeeping based on external 32.768 kHz Security and Safety Sensors crystal Remote Control - 192-bit transmission code length: Remote Keypad - 32-bit unencrypted portion Wireless Sensors - 128-bit encrypted, hopping code portion - 32-bit authorization check Package Type: EELOQ Technology: Classic K - Programmable 28-bit serial number 20-pin TSSOP - Data based on Classic KEELOQ Technology: -KEELOQ technology 32-bit block cipher FIGURE 1: 20-PIN TSSOP - Programmable 64-bit crypt key -KEELOQ technology secure learn - Programmable 60-bit seed value - 66-bit transmission code length: VDD 1 20 VSS - 34-bit unencrypted portion SOSCI SW0 19 2 - 32-bit encrypted, hopping code portion SOSCO SW1 18 3 Operating Features: SW3 4 SW2 17 - 1.8 to 3.6V operation PGC 16 LED - Four switch inputs 5 - 15 functions available DATA OUT PGD 6 15 - Configurable button modes VSS CTRL OUT 7 14 - One active-low LED drive VDD XTAL 8 13 - Configurable minimum code word completion RF: CTRL IN 9 12 DATA IN - Configurable bit rate RFOUT VSS 10 11 - Configurable modulation, supporting FSK and OOK - Configurable data modulation, supporting PWM and Manchester Other: - Button inputs have internal pull-up resistors - LED output 2014 Microchip Technology Inc. DS40001747A-page 1 MCS3142MCS3142 TABLE 1: PIN DESCRIPTION Name 20-Pin TSSOP Input Type Output Type Description VDD 1 Power Power SOSCI 2 Analog Secondary Oscillator SOSCO 3 Analog Secondary Oscillator SW3 4 TTL Switch 3 Input PGC 5 TTL Programming Clock PGD 6 TTL TTL Programming Data 7 No Connection Tie to Vss VDD 8 Power Power CTRL IN 9 TTL Transmitter Clock RFOUT 10 RF Transmitter Output VSS 11 Power Power DATA IN 12 TTL Transmitter Data XTAL 13 Analog Transmitter Reference Oscillator CTRL OUT 14 TTL Transmitter Clock DATA OUT 15 TTL Transmitter Data 16 TTL LED Output (active-low) LED SW2 17 TTL Switch 2 Input SW1 18 TTL Switch 1 Input SW0 19 TTL Switch 0 Input VSS 20 Power Power DS40001747A-page 2 2014 Microchip Technology Inc.