RT1540

Rato RT1540 DESCRIPTION RT1540 is a one time programmable Encoder Utilizing CMOS technology process. RT1540 has a maximum of 20 bits providing up to 1 million codes. It can reduce code collision and unauthorized code scanning possibilities. FEATURES 1. CMOS technology. 2. Low stand by current < 1μA. 3. Wide range of Operating Voltage: Vcc = 1.8V ~ 13V. 4. Up to 4 data pins. 5. Total 1048576 address codes. 6. Single Resistor Oscillator. APPLICATIONS 1. Car and Motorcycle Security system. 2. Wireless Door Bell. 3. Home Security System. PIN OUT PIN DESCRIPTION A081015-V1.0 1 Rato RT1540 Symbol VCC GND TXD K0 K1 K2 K3 OSCI DESCRIPTION Positive power supply. Ground. Transmission data output pin. Data input with pull-low R. Active High. Data input with pull-low R. Active High. Data input with pull-low R. Active High. Data input with pull-low R. Active High. Single resistor oscillator pin. Connected R to VCC. PIN I/O 1— 2— 3O 4I 5I 6I 7I 8I FUNCTIONAL DESCRIPTION When data pin (K0~K3) set to “1”, RT1540 will transmit serial data waveform from C0~C19 to D0~D3 by radio frequency (RF) modulation. This can be use in most of the remote control application. Data Transmission Code Frame A code frame period is depended on data pin active period. When data pin is active the code word transmit continuously until data pin inactive. Format is as follow: A081015-V1.0 2 Rato RT1540 CODE Word Code word consists of full set of serial data format. The combination is as follow: Sync. ...