Rato RT1221/RT1222 Description: RT1221/RT1222 are remote control transmitter utilizing CMOS technology specially designed for infrared remote control applications. Maximum of 65536 customer codes are available by setting external diodes, resistors and internal MASK ROM. Using micro-processors for decoder can construct various powerful applications for remote control systems. Features: Pin Out: CMOS technology Operating voltage:1.8~3.5V Low power consumption 455KHz ceramic resonator or crystal REM with 38KHz carrier for IR medium 65536 customer codes can be selected Maximum active keys: RT1221: 32 function keys and 3 double action keys RT1222: 64 function keys and 3 double action keys Absolute Maximum Rating: Symbol Parameter VCC Supply Voltage VIN Input Voltage Pd Power Dissiption TSTR Storage Temperature TOP Operating Temperature (Temp=25℃) Rating UNIT 6.0 V -0.3∼VCC V 250 mV -40∼+125 ℃ -20∼+70 ℃ Conditions Electrical Characteristic Symbol fOSC Parameter System Frequency VCC Supply Voltage ICC Operating Current ISTB Standby Current LED Sink Current Dout Source Current IOL(LED) IOH(DOUT) Conditions 455k Ceramic resonator All Function Operations fOSC =455kHz Without Load fOSC Stop VO=0.3V VO=2.7V １ Min. Typ. 455K Max. Unit HZ 1.8 3.0 3.5 V - 200 400 UA 1.2 -2.0 0.1 2.0 -4.0 1 - UA mA mA