PT2249A PTC | Alldatasheet

Document overview

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Technical content

Features

! CMOS Technology ! Low Power Consumption ! Very High Noise Immunity ! Able to output parallel multiple keying signals sent from the transmitter (PT2249A is able to output up to 5 functions simultaneously while PT2250A is able to output up to 6 functions simultaneously) ! Outputs for single pulse, hold pulse and cyclic pulse are provided ! A single terminal type oscillator by means of RC is provided ! Code Detection Circuit prevents interference from various types of machines and apparatus ! Digital Filtering and Code Checking prevent interference from light sources such as PL Lamp without sacrificing the receiving sensitivity

Applications

! Audio Equipment Remote Control ! Television (TV) Remote Control ! Video Cassette Recorder (VCR) Remote Control

Princeton Technology Corp. Tel: 886-2-29162151 Fax: 886-2-29174598 URL: http://www.princeton.com.tw Infrared Remote Control Receiver PT2249A / PT2250A Series PT2249A/50A v 2.3 Page 2 Revised Dec. 1999 Pin Configurations V RXIN HP1 HP2 HP3 HP4 HP5 SP5 SS V OSC CODE2 CODE3 SP1 SP2 SP3 SP4 CC PT2249A V RXIN HP1 HP2 HP3 HP4 HP5 CP2 SS V OSC CODE2 CODE3 SP1 SP2 SP3 CP1 CC PT2249AI / PT2249AIN PT2249AL / PT2249ALN PT2249AH / PT2249AHN (16 PDIP 300 mil) (16 PDIP 300 mil) V RXIN HP1 HP2 HP3 HP4 HP5 HP6 CP2 CP1 SP10 SP9 SS V OSC CODE1 CODE2 SP1 SP2 SP3 SP4 SP5 SP6 SP7 SP8 CC PT2250A /PT2250AN PT2250AL / PT2250ALN (24 PDIP 600 mil) A N I L H Advanced Version Inversed RXIN Input Independent Cyclic (Toggle) Outputs Advanced Dependent Cyclic (Toggle) Outputs) Output Format same as "L", except that when HP1 or H P2 is active, it will clear CP1.

Princeton Technology Corp. Tel: 886-2-29162151 Fax: 886-2-29174598 URL: http://www.princeton.com.tw Infrared Remote Control Receiver PT2249A / PT2250A Series PT2249A/50A v 2.3 Page 3 Revised Dec. 1999 Application Circuit PT2249A CONTROL SIGNAL OUTPUTCONTROL SIGNAL OUTPUT Vcc 1000pF RX INPUT 39K PT2250A CONTROL SIGNAL OUTPUT CONTROL SIGNAL OUTPUT RX INPUT Vcc 1000pF 39K

Princeton Technology Corp. Tel: 886-2-29162151 Fax: 886-2-29174598 URL: http://www.princeton.com.tw Infrared Remote Control Receiver PT2249A / PT2250A Series PT2249A/50A v 2.3 Page 4 Revised Dec. 1999 Application Note: 1. Combination of PT2248/PT2249A Series Code Bits a) PT2249A Series Code Bit C1 is internally pulled high and thereby set at a default value of “1”. Thus, PT2248 Code Bit C1 must be set at “1”. b) PT2249A Series Code Bits C2 and C3 may be programmed as follows: 1) “0”, “0” (This combination is not available with TC9149.) 2) “0”, “1” 3) “1”, “0” 4) “1”, “1” c) To set Code Bit to “1” on PT2248, diodes must be connected to Code Terminal from the T1 ~ T3 terminals. d) To set Code Bit to “0” on PT2248, the terminals must be kept floating, except C1 - add one diode. e) The Code Bits Combinations of PT2248 and PT2249A Series are shown below: PT2248 PT2249A Series C1 C2 C3 C2 C3 1 0 000 1 0 101 1 1 010 1 1 111 f) Example : (Refer to Example 1 diagram) The following example shows the case when PT2248 Code Bits C1 = 1, C2 = 1, and C3 = 0. The CODE2 Pin of the PT2249A Series is programmed in floating state and CODE3 pin is connected to Vss (C2 = 1,

Princeton Technology Corp. Tel: 886-2-29162151 Fax: 886-2-29174598 URL: http://www.princeton.com.tw Infrared Remote Control Receiver PT2249A / PT2250A Series PT2249A/50A v 2.3 Page 5 Revised Dec. 1999 C3 = 0. ) In this way, the PT2249A Series can match the C2, C3 Code Bits of PT2248 and correctly decode the remote commands. CODE T3 T2 T1 K6 PT2248 C3=0 C2=1 C1=1 CODE3 CODE2 OSC Vcc PT2249A Series C3=0 C2=1 Example 1 Circuit Diagram when Code Bit C2 = 1 and C3 = 0 2. Combination of PT2248/PT2250A Series Code Bits a) PT2250A Series Code Bit C3 is internally pulled high and thereby set at a default value of “1”. Thus, PT2248 Code Bit C3 must be set at “1”. b) PT2250A Series Code Bits C2 and C3 may be programmed as follows: 1) “0”, “0” (This combination is not available with TC9150.) 2) “0”, “1” 3) “1”, “0” 4) “1”, “1” c) To set Code Bit to “1” on PT2248, diodes must be connected to Code Terminal from the T1 ~ T3 terminals. d) To set Code Bit to “0” on PT2248, the terminals must be kept floating.

Princeton Technology Corp. Tel: 886-2-29162151 Fax: 886-2-29174598 URL: http://www.princeton.com.tw Infrared Remote Control Receiver PT2249A / PT2250A Series PT2249A/50A v 2.3 Page 6 Revised Dec. 1999 e) The Code Bits Combinations of PT2248 and PT2250A Series are shown below: PT2248 PT2250A Series C1 C2 C3 C1 C2 001 0 0 011 0 1 101 1 0 111 1 1 f) Example : (Refer to Example 2 diagram) The following example shows the case when PT2248 Code Bits C1 = 0, C2 = 0, and C3 = 1. The CODE1 and CODE2 pins of the PT2250A Series are connected to the Vss (C1=0 and C2=0). In this way, the PT2250A or any of its series matches the C1 and C2 Code Bits of PT2248; thus, the remote commands are correctly decoded. CODE T3 T2 T1 K6 C1=0 C2=0 PT2248 CODE1 CODE2 OSC Vcc PT2250A Series +5V C1=0 C2=0 Example 2 Circuit Diagram when Code Bit C1= 0 and C2 = 0