PT2249A Remote Control Receiver IC DESCRIPTION The PT2249A Series is infra-red remote control receivers utilizing CMOS Technology. Remote Control System can be constructed together with the PT2248 remote control encoder. The PT2249A Series are packaged in 16 pins DIP (PT2249A version is also available in SOP package) and are capable of controlling 10 functions. Several options, inverting/non-inverting IR signal input and/or dependent/independent cyclic (toggle) outputs, are provided to fit different application needs. APPLICATIONS • Audio equipment remote control • Television (TV) remote control • Video Cassette Recorder (VCR) remote control 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 ) 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 BLOCK DIAGRAM Tel: 886-66296288‧Fax: 886-29174598‧ http://www.princeton.com.tw‧2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan PT2249A APPLICATION CIRCUIT V2.7 2 November 2012 PT2249A ORDER INFORMATION Valid Part Number PT2249A PT2249AHN PT2249AL PT2249A-SN Package Type 16 Pins, DIP, 300mil 16 Pins, DIP, 300mil 16 Pins, DIP, 300mil 16 Pins, SOP, 150mil Top Code PT2249A PT2249AHN PT2249AL PT2249A-SN Functions: 1. A – Advanced Version 2. N – Inversed RXIN Input 3. L – Advanced Dependent Cyclic (Toggle) Outputs 4. H – Output Format same as “L”, except that when HP1 or HP2 is active, it will clear CP1. PIN CONFIGURATION V2.7 3 November 2012 PT2249A PIN DESCRIPTION Pin Name Vss Pin No. PT2249A PT2249AL PT2249A-SN PT2249AHN 1 1 I/O Description - Negative Power Supply Receiver Input. Instruction signal with carrier wave eliminated should be inputted to this pin. Input signal may be optionally inverted before fed into internal decoding circuit. Hold Pulse. As long as proper signal is received, this output is held at “H” level. (approximately 160ms will be “0” after key is released.) Cyclic Pulse. When receiving signal is inputted, CP1/CP2 is inversed. CP1 output may be optionally governed by (dependent to) the output state of CP2. See Functional Description for details. Single Pulse. When the receiving signal is inputted, the active output will be at “H” level only for a fixed duration of time (approximately 107 msec), then it will return to “L” level. Tx/Rx Matching Code. Transmitter Code is compared with a code set at this terminals and if matched, input is accepted. RXIN 2 2 I HP1 ~ HP5 3~7 3~7 O CP1 - 9 O CP2 - 8 O SP1 ~ SP3 12 ~ 10 12 ~ 10 O SP4 9 - O SP5 8 - O CODE2 14 14 I CODE3 13 13 I OSC 15 15 I/O Vcc 16 16 - V2.7 4 OSC Input/Output. A resistor and a capacitor are in parallel connection between this terminal and Vss. Positive Power Supply November 2012 PT2249A FUNCTION DESCRIPTION OSCILLATION CIRCUIT Timing with transmitter signal and internal operating clock are all decided by this oscillator. Using CMOS Technology, the oscillator of PT2248 transmitter is constructed through a combination of a linear amplifier by connecting C and R between the oscillator terminal and Vss. Notes: 1. R=39K±5% 2. C=100pF±5% RECEIVING SIGNAL INPUT CIRCUIT The signal is received by IR receiver module and the wave is infused into the IC. The RXIN has a built-in Schmitt trigger circuit for shaping received signal waveform to eliminate rounding. PTC has made available various options to suit IR receiving module with positive or negative output. PT2249A Series with “N” Option was specially designed for IR modules with negative output. PT2249A Series without the “N” Option were specially designed for IR receiving modules with positive output. In these two options, IR signals without external inversion can be fed into the RXIN directly. V2.7 5 November 2012 PT2249A RECEIVING SIGNAL CHECK The receiving signal check is used to check 2 cycle transmitting signals sent from the transmitter to determine if it is a normal signal. First, the data is stored in the 12-bit shift register. Then, when the second data is pushed into the shift register, the data is forced out of the shift register by one bit where the first data has been stored. The “pushed out” data and the incoming data are checked to see if they match. If there is an error in the receiving signal of the 12-bit data check, the system is reset at that point. Conversely, when all receiving data are checked OK, (HP1 ~ HP6 signals) outputs are raised from “L” level to “H” level. CODE COMPARISON To prevent interference with other models: C1, C2, and C3 code bits are provided to check whether the transmitter and receiver codes match. It is only when both codes match that the internal latch strobe pulse is generated to latch the receiving data. The output is then raised from “L” level to “H” level. If both codes do not match, no latch strobe pulse is generated and the output remains at “L” level (HPs and SPs) or unchanged (CPs). The Code Bits used differ depending on the receiver. Please refer below. Rx PT2248 Code Pin T1 (C1 Code) T2 (C2 Code) T3 (C3 Code) PT2249A Diode C2 C3 Note: where C1, C2, C3 will be “1” if one diode is connected between CODE and Tn pins; n=1 to 3 in PT2248; otherwise will be set to “0”. V2.7 6 November 2012 PT2249A CODING CODE1, CODE2 and CODE3 are internally pulled up to Vcc by pull-up resistors. To encode each code bit to “1”: Open the corresponding CODE pin, or Insert a capacitor between CODE pin and Vss. To encode each Code bit to “0”: Connect the corresponding CODE pin to Vss. EXPLANATION OF OUTPUT TYPES: SP, HP AND CP Single Pulse (SP1~SP10) If there is no error in the receiving signal of the 12-bit data check, it will generate a single pulse output. V2.7 7 November 2012 PT2249A Hold Pulse (HP1~HP6) Normally, after two matched code words (12-bit per word) transmitted from PT2248 is detected, the latch strobe is generated, thereby producing a latch strobe pulse. This causes an “H” state output and this output is sustained at “H” level as long as the continuous signal received. Approximately 160ms after the key is released and the continuous signal is stopped, the output is reversed to “L” level by above the last latch strobe pulse. Please refer to the diagram Under abnormal conditions where intolerable interference of any kind would cause the receiver to receive only one matched code word during the last transmission (please refer to the diagram above), then approximately 160ms after the key is released and the hold shot output (continuous signal) is stopped, the output is reversed to “L” level. Under any condition, the HP1 ~ HP6 are able to drive simultaneously a maximum of six outputs at “H” Level by the continuous signals sent from the transmitter. These functions are most applicable for REC-PLAY, REC-PAUSE and CUE/REVIEW of the Tape Deck. V2.7 8 November 2012 PT2249A CYCLIC PULSE (CP1~CP2) When signal is received, the cyclic pulse output is reversed. This cyclic pulse is used for Power ON/OFF, MUTE, etc. The relationship between CP1 and CP2 (in the PT2249A Series) is shown in the diagram below: PT2249AL: • CP1 may not be set to “H” level when CP2 is in “H” Level. • CP1 is reset to “L” level whenever CP2 is set to “H” level. PT2249AHN: • CP1 may not be set to "H" Level when CP2 or HP1 or HP2 is in "H" Level. • CP1 is reset to "L" Level whenever CP2 or HP1 or HP2 is set to "H" Level. V2.7 9 November 2012 PT2249A CODE ALLOCATION* * NOTE: KEY NO. IS OF PT2248 Key No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 H T1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 S1 T2 0 0 0 0 0 0 1 1 1 1 1 1 0 0 0 0 0 0 S2 T3 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 PT2248 Data Bit D1 D2 D3 K1 K2 K3 1 0 0 0 1 0 0 0 1 0 0 0 0 0 0 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 0 0 0 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 0 0 0 0 0 0 D4 K4 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 1 0 0 D5 K5 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 1 0 D6 K6 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 1 Function of Instruction (PT2249A O/P) Continuous Signal Continuous Signal Continuous Signal Continuous Signal Continuous Signal Continuous Signal Single-Shot Signal Single-Shot Signal Single-Shot Signal Single-Shot Signal Single-Shot Signal Single-Shot Signal Single-Shot Signal Single-Shot Signal Single-Shot Signal Single-Shot Signal Cyclic Signal Cyclic Signal HP1 HP2 HP3 HP4 HP5 HP6 SP1 SP2 SP3 SP4 SP5 SP6 SP7 SP8 SP9 SP10 CP1 CP2 C1 ~ C3 Code Bits are available in addition to the above data bits for optional Code Selection. PT2249A are able to use Key No. 1 ~ 5 and Key No. 7 ~ 11. PT2249A/AL/AHN can use Key No. 1 ~ 5, Key No. 7 ~ 9, and Key No. 17 ~ 18. V2.7 10 November 2012 PT2249A ABSOLUTE MAXIMUM RATING (Ta=25℃) Parameter Supply voltage Input/Output voltage Power dissipation Operating temperature Storage temperature Symbol VCC VIN Pd Topr Tstg Rating 5.5 Vss-0.5 ~ Vcc+0.5 200 -40 ~ +85 -40 ~ +150 Unit V V mW ℃ ℃ Note: Exceeding the maximum rating may cause permanent damage to devices. ELECTRICAL CHARACTERISTICS (Unless otherwise specified, VCC=5V and Ta=25℃) Parameter Symbol Conditions Operating supply voltage Vcc All Function Operations Operating supply current Icc Key on without Load Oscillation frequency fosc Vcc=5 V Output “H” level IOH Vo=4V Current “L” level IOL Vo=1 V Pull-up resistor Rup Input current IIH VI=5V Input circuit threshold VI RXIN voltage Input hysterestic VHIS voltage RXIN=0V, OSC=5V PT2249AL Stand-by ISB (All Outputs floating) current PT2249AHN V2.7 11 Min. 2.3 25 -1.0 1.0 150 -1.0 Typ. 34 300 - Max. 5.0 1.0 41 450 1.0 Unit V mA KHz mA mA KΩ µA 2.0 2.5 3.0 V - 0.6 - V - - 300 300 µA November 2012 PT2249A APPLICATION NOTE 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: C1 1 1 1 1 PT2248 C2 0 0 1 1 C3 0 1 0 1 PT2249A Series C2 C3 0 0 0 1 1 0 1 1 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, C3=0.) In this way, the PT2249A Series can match the C2, C3 Code Bits of PT2248 and correctly decode the remote commands. Example, Circuit Diagram when Code Bit C2=1 and C3=0 V2.7 12 November 2012 PT2249A PACKAGE INFORMATION 16 PINS, DIP, 300MIL Symbol A A1 A2 b c e D E E1 L Min. 0.38 2.92 0.36 0.20 Typ. 3.30 2.54 BSC. 19.17 7.62 BSC. 7.87 - 18.67 7.62 2.92 Max. 5.33 4.95 0.56 0.36 19.69 8.26 3.81 Notes: 1. Refer to JEDEC MS-001 BB 2. Unit: mm V2.7 13 November 2012 PT2249A 16 PINS, SOP, 150MIL Symbol A A1 b c e D H E L θ Min. 1.35 0.08 0.31 0.16 Typ. 1.27 BSC. 9.90 BSC. 6.00 BSC. 3.90 BSC. - 0.40 0° Max. 1.77 0.28 0.51 0.26 1.27 8° Notes: 1. Refer to JEDEC MS-012 AC 2. Unit: mm V2.7 14 November 2012 PT2249A IMPORTANT NOTICE Princeton Technology Corporation (PTC) reserves the right to make corrections, modifications, enhancements, improvements, and other changes to its products and to discontinue any product without notice at any time. PTC cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a PTC product. No circuit patent licenses are implied. Princeton Technology Corp. 2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan Tel: 886-2-66296288 Fax: 886-2-29174598 http://www.princeton.com.tw V2.7 15 November 2012