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| Princeton Technology Corp. Infrared Remote Control Transmitter DESCRIPTION Tel : 886-2-29162151 Fax : 886-2-29174598 URL: http://www.princeton.com.tw PT2212 PT2212 is a remote control transmitter utilizing CMOS Technology specially designed for infrared remote control applications. PT2212 can support up to 256 command codes and is functionally compatible with TC9012. Pin assignments and application circuit are optimized for easy PCB Layout and low cost advantage. FEATURES CMOS Technology Low Power Consumption Least External Components Low Voltage Operation Double Key Operation Up to 32 Function Keys provided Up to 8 System Codes Up to 256 Command Codes High Efficiency Transmission Transmission Indication Output Pin provided APPLICATIONS Television VCR Video Disc CD Player AV Controller Audio Equipment PT2212 v1.0 Page 1 Updated June 1998 Princeton Technology Corp. Infrared Remote Control Transmitter BLOCK DIAGRAM OSCO OSCI Tel : 886-2-29162151 Fax : 886-2-29174598 URL: http://www.princeton.com.tw PT2212 DOUT LMP OSCILLATION CIRCUIT OUTPUT CIRCUIT DIVIDING CIRCUIT CARRIER GENERATING CIRCUIT CONTROL CIRCUIT VSS TIMING CIRCUIT SYSTEM CODE LATCH CIRCUIT KEY INPUT CIRCUIT VDD DATA REGISTER SEL KEY SCAN OUTPUT CIRCUIT KI0 KI1 KI2 KI3 KO0 KO1 KO2 KO3 KO4 KO5 KO6 KO7 PIN CONFIGURATION PT2212 v1.0 Page 2 Updated June 1998 Princeton Technology Corp. Infrared Remote Control Transmitter APPLICATION CIRCUIT Key Matrix 4 3 8 12 11 10 9 16 15 14 20 19 18 24 23 22 28 27 Tel : 886-2-29162151 Fax : 886-2-29174598 URL: http://www.princeton.com.tw PT2212 32 31 30 29 7 6 2 1 26 25 Wired (one place for input line) 5 13 17 21 SEL KO0 KO1 KO2 KO3 KO4 KO5 KO6 KO7 LMP PT2212 KI0 KI1 KI2 KI3 DOUT VDD NC OSC2 OSC1 VSS 455 KHz Transmission Indicator LED 1K Ohms 100pF 100pF VDD=3V Note: + KO0 to KO7 KI0 to KI3 47uF 2 Ohms IR LED n n=1 to 32 PT2212 v1.0 Page 3 Updated June 1998 |
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