Tel：886-2-29162151 Fax：886-2-29174598 URL: http://www.princeton.com.tw Encoder IC PT2240B Description PT2240B is encoder utilizing CMOS Technology specially designed for remote control applications. It has 20 Address. It can support up to 4 Data Bits and is housed in 8 pin SO Package. It encodes address and data codes into a coded waveform suitable for RF modulation. The pin assignments and application circuit are optimized for easy PCB Layout and cost saving advantage. Furthermore, PT2240B’s intrinsic feature of being able to support 4 data bits considerably reduces inventory pressures. Features • • • • • • • • • • CMOS Technology Low Power Consumption Least External Components High Noise Immunity Single Resistor Oscillator Operating Voltage: 1.8~15 V 4 Data Pins 220 Address Codes Available in SO Package Reduction of Inventory Pressures Applications • • • • • Burglar Alarm System Car Security System Car/Garage Door Controller Home/Office Security System Personal Alarm System PT2240B v1.0 - 1- Mar. 2002 Tel：886-2-29162151 Fax：886-2-29174598 URL: http://www.princeton.com.tw Encoder IC PT2240B Pin Configurations VCC VSS DOUT D3 8 7 6 5 1 2 3 4 OSC D0 D1 D2 PT2240B Figure 1: PT2240B Pin Configurations PT2240B v1.0 - 2- Mar. 2002 Tel：886-2-29162151 Fax：886-2-29174598 URL: http://www.princeton.com.tw Encoder IC PT2240B Application Circuits 1.8V~15V VCC OSC VSS D0 DOUT D1 D3 D2 Rosc RF Figure 2: PT2240B (8-pin) Application Circuit Note: In order that IC protection is assured, please make sure that a diode is connected between the battery and the VDD. If the diode is not connected and the battery polarity was inverted, then the IC will fail. Rosc RF VCC OSC VSS D0 DOUT D1 D3 D2 1.8V~15V Figure 3: PT2240B Power Failure Application Circuit Order Information Valid Part Number PT2240B PT2240B v1.0 Package 8 Pins, SOP (150 mil) - 3- Mar. 2002