Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw Remote Control Encoder PT2268BLOCK DIAGRAM VCCVSSOSC1OSCOSC2TimingCircuitI1I2I3I4I5I6I7I8EncoderKey InputScanningand SamplingOutputWaveformGeneratorTx OUTC4C5C6 PT2268 V2.5 - 2 - April, 2006 For:Natertech
Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw Remote Control Encoder PT2268PIN CONFIGURATION I1I2I3I4I5I6I7I812345678PT2268161514131211109VCCOSC1OSC1TxOUTC4C5C6VSS PIN DESCRIPTION Pin Name I/O Description Pin No.Key Input Pins. I1 ~ I8 I These pins are used to connect a maximum of 8 keys. (Each pin has a 1 ~ 8 built-in pull-low resistor.) VSS - Negative Power Supply 9 Select Input Pin for Start Word C4 ~ C5 I 12 ~ 11 These pins have internal pull-low resistors. Select Input Pin for Start Word C6 I 10 This pin has an internal pull-high resistor. Transmission Output Pin. Tx OUT O This pin is an open drain (NMOS) output and is used to transmit 13 signals. The carrier frequency is 38 KHz. OSC1 I Oscillator No.1 Pin These pins are used to externally connect a 15 455 KHz Ceramic Resonator OSC2 O Oscillator No.2 Pin 14 VCC - Positive Power Supply 16 PT2268 V2.5 - 3 - April, 2006 For:Natertech
Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw Remote Control Encoder PT2268FUNCTION DESCRIPTION KEY INPUT Up to eight (8) keys can be directly connected to pins I1 ~ I8. Please refer to the diagram below. VCCI1I2I3I4I5I6I7I8PT2268 Furthermore, PT2268 has a built-in pull-low resistor of about 60K ~ 110KΩ which reduces the need for external components. OSCILLATOR An oscillation circuit can be constructed using the CMOS Inverter and Built-in Feedback Resistor, 455KHz Crystal and two 220pF capacitors. The carrier frequency is 38KHz. PT2268OSC1OSC2220pF455KHz220pF Unless any of the 8 keys (I1 ~ I8) is being operated, the oscillation is automatically stopped. Thus, power consumption is considerably reduced. PT2268 V2.5 - 4 - April, 2006 For:Natertech
Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw Remote Control Encoder PT2268TRANSMISSION WAVEFOM When any of the 8 keys (I1 ~ I8) is set to “High”, the TxOUT outputs one start word followed by 2 identical data words and a space. The code will be continuously outputted until the key is released. If for any reason, the key was released during the code transmission process, the code that is being transmitted during the key release action will still be completely outputted. Please refer to the following diagram. I1 ~ I8
TxOUT
Start1st2nd SpaceStart1st2nd SpaceWordWordWordWordWordWordStart1st2nd SpaceWordWordWord20ms80ms1 Frame=80ms Note: OSC=455KHz TRANSMISSION CODE WAVEFORM The transmission waveforms of the Start Word and the different Data Words generated when a specific input key (I1 ~ I8) is pressed are illustrated below (see also Transmission Code Pattern Section). CLKSTARTW1 W2W3W4W5W6W7W810X3XXX=0.625ms April, 2006PT2268 V2.5 - 5 - For:Natertech
Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw Remote Control Encoder PT2268TRANSMISSION CODE PATTERN The transmission code pattern of PT2268 is given in the table below. Please refer to PT2265 transmission code pattern. LSB MSB Transmission Receiver C0 C1C2C3C4C5C6 C7 Start Word 0 0 1 1 0 0 1 1 B0 B1B2B3B4B5B6 B7 Data Word W1 (I1) 0 0 1 1 1 0 1 0 0/p1 (Key pressed) W2 (I2) 0 1 0 1 1 0 0 0 0/p2 W3 (I3) 0 1 1 0 0 0 1 0 0/p3 W4 (I4) 1 0 0 1 1 1 0 0 0/p4 W5 (I5) 1 0 1 0 0 1 1 0 0/p5 W6 (I6) 1 0 1 1 0 0 0 1 0/p6 W7 (I7) 1 1 0 0 0 1 0 1 0/p7 W8 (I8) 1 1 0 1 0 0 1 0 0/p8 START WORD CUSTOM CODE The start word custom code has the following format: LSB MSB0 0 1 C3 C4 C5 C6 1 where: C3=1 (default value) =bonding option available C4=“0” when floating or connected to VSS =“1” when connected to VCC C5=“0” when floating or connected to VSS =“1” when connected to VCC C6=“0” when connected to VSS = “1” when floating or connected to VCC Note: C4 and C5 have internal pull-low resistors while C6 has an internal pull-high resistor. PT2268 V2.5 - 6 - April, 2006 For:Natertech
Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw Remote Control Encoder The start word custom code table is given below: C3=0 C3=1(default) Custom Code Custom Code C4 C5 C6 (C0 TO C7) (C0 TO C7) 0 0 0 00100001 00110001 0 0 1 00100011 00110011 0 1 0 00100101 00110101 0 1 1 00100111 00110111 1 0 0 00101001 00111001 1 0 1 00101011 00111011 1 1 0 00101101 00111101 1 1 1 00101111 00111111 PT2268OPERATION FLOWCHART Power OnStand ByNOKey Press?YESEnableOscillatorDebounceCodeCorrect?YESOne Frame Code TransmitNONOKeyReleased?YES PT2268 V2.5 - 7 - April, 2006 For:Natertech
Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw Remote Control Encoder PT2268ABSOLUTE MAXIMUM RATINGS Parameter Supply voltage Input/Output voltage Power dissipation Operating temperature Storage temperature Symbol Vcc Vin/Vout PD Topr Tstg Rating 0 ~ 6.0 Vss-0.2 ~ Vcc+0.3 500 -40 ~ +85 -65 ~ +150 Unit V V mW ℃ ℃ ELECTRICAL CHARACTERISTICS Normal Operating Condition: Ta=0℃ ~ +70℃, VCC-VSS=3V±10% Parameter Symbol Condition Min. Typ. Max. UnitOperating voltage VCC 2.2 3 5 V OSC On Operating current IOP TxOUT is floating. 500 1000 µA (See Note) I1 ~ I8=“L” Stand-by current ISB OSC Stops. 0.5 1 3 µA TxOUT is floating. VOL=2.2 V, VDD=3V8 15 Sinking current of TxOUTISINK mA VOL=1.5 V, VDD=3V4 6 VIH 0.7VCC- VCC Input voltage of I1 ~ I8 V VIL 0 - 0.3VCCInput pull-low resistor RL 30 50 80 KΩ Input pull-high resistor RH 40 90 150 KΩ OSC frequency 455 KHz Note: For pins I1~I8: Any one of the said pins is set to HIGH while the others are set to LOW. PT2268 V2.5 - 8 - April, 2006 For:Natertech
Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw Remote Control Encoder PT2268APPLICATION CIRCUIT PT2268 IR Transmitter Application Circuit +3V_Battery+47µF(see Layout Note)I1I2I3I4I5I6I7I8 Vcc220pFOSC1OSC2 TXOUT C4 C5 C6 Vss455KHz220pFRPNPIR LED2Ω Notes: 1. C3 (default value)=1. For more details, please refer to Start Word Custom Code Section. 2. Resistor (R) is the Current Limit Impedance whose value must be greater than 220Ω. Resistor (R) Recommended Value=1KΩ Layout Note: Place 47µF capacitor as near as possible to the PT2268's VSS Pin. PT2268 V2.5 - 9 - April, 2006 For:Natertech
Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw Remote Control Encoder PT2268ORDER INFORMATION Valid Part Number PT2268P8-Z PT2268Z PT2268Z-S Package Type 8 Pins, DIP, 300mil 16 Pins, DIP, 300mil 16 Pins, SOP, 300mil Top Code PT2268P8-Z PT2268Z PT2268Z-S PT2268 V2.5 - 10 - April, 2006 For:Natertech
Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw Remote Control Encoder PT2268PACKAGE INFORMATION 8 PINS, DIP, 300MIL PT2268 V2.5 - 11 - April, 2006 For:Natertech
Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw Remote Control Encoder PT2268 Symbol Min. Nom. Max. A - - 0.210 A1 0.015 - - A2 0.115 0.130 0.195 b 0.014 0.018 0.022 b1 0.014 0.018 0.020 b2 0.045 0.060 0.070 b3 0.030 0.039 0.045 c 0.008 0.010 0.014 c1 0.008 0.010 0.011 D 0.355 0.365 0.400 D1 0.005 - - E 0.300 0.310 0.325 E1 0.240 0.250 0.280 e 0.100 BSC. eA 0.300 BSC. eB - - 0.430 eC 0.000 - 0.060 L 0.115 0.130 0.150 Notes: 1. Controlling Dimension: INCHES. 2. Dimensioning and tolerancing per ANSI Y14.5M-1982. 3. Symbols are defined in the “MO Series Symbol LIST” in Section 2.2 of Publication No.95. 4. Dimensions A, A1 and L are measured with the package seated in JEDEC Seating Plane Gauge GS-3. 5. D, D1 and E1 dimension do not include mold flash or protrusions. Mold flash or protrusions shall not exceed 0.010 inch. 6. E and eA measured with the leads constrained to be perpendicular to data -C- . 7. eB and eC are measured at the lead tips with the leads unconstrained. 8. N is the number of leads (N=8). 9. Pointed or rounded lead tips are preferred to ease insertion. 10. b2 and b3 maximum dimensions do not include dambar protrusions. Dambar protrusions shall not exceed 0.010 (0.25mm). 11. Variation BA has a b3 dimension and is 1/2 lead package. 12. Distance between the leads including dambar protrusions to be 0.005 inch minimum. 13. Datum plane -H- coincident with the bottom of lead where lead exits the body. 14. Refer to JEDEC MS-001 variation BA. JEDEC is the registered trademark of JEDEC SOLID STATE TECHNOLOGY ASSOCIATION. PT2268 V2.5 - 12 - April, 2006 For:Natertech
Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw Remote Control Encoder PT226816 PINS, DIP, 300MIL PT2268 V2.5 - 13 - April, 2006 For:Natertech
Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw Remote Control Encoder PT2268 Symbol Min. Nom. Max. A 0.210 A1 0.015 A2 0.115 0.130 0.195 b 0.014 0.018 0.022 b1 0.014 0.018 0.020 b2 0.045 0.060 0.070 b3 0.030 0.039 0.045 c 0.008 0.010 0.014 c1 0.008 0.010 0.011 D 0.780 0.790 0.800 D1 0.005 E 0.300 0.310 0.325 E1 0.240 0.250 0.280 e 0.100 bsc. eA 0.300 bsc. eB 0.430 eC 0.000 0.060 L 0.115 0.130 0.150 Notes: 1. All dimensions are in INCHS. 2. Dimensioning and tolerancing per ANSI Y14.5M-1982. 3. Dimensions “A”, “A1” and “L” are measured with the package seated in JEDEC Seating Plane Gauge GS-3. 4. “D”, “D1” and “E1” dimensions do not include mold flash or protrusions. Mold flash or protrusions shall not exceed 0.010 inch. 5. “E” and “eA” measured with the leads constrained to be perpendicular to datum -c-. 6. “eB” and “eC” are measured at the lead tips with the loads unconstrained. 7. “N” is the number of terminal positions. (N=16) 8. Pointed or rounded lead tips are preferred to ease insertion. 9. “b2” and “b3” maximum dimensions are not include dambar protrusions. Dambar protrusions shall not exceed 0.010 inch (0.25 mm). 10. Distance between leads including Dambar protrusions to be 0.005 inch minimum. 11. Datum plane -H- coincident with the bottom of lead, where lead exits body. 12. Refer to JEDEC MS-001 Variation AB. JEDEC is the trademark of JEDEC SOLID STATE TECHNOLOGY ASSOCIATION. PT2268 V2.5 - 14 - April, 2006 For:Natertech
Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw Remote Control Encoder PT226816 PINS, SOP, 300MIL Symbol Min. Nom. Max. A 2.35 2.65 A1 0.10 0.30 B 0.33 0.51 C 0.23 0.32 D 10.10 10.50 E 7.40 7.60 e 1.27 bsc. H 10.00 10.65 h 0.25 0.75 L 0.40 1.27 α 0° 8° PT2268 V2.5 - 15 - April, 2006 For:Natertech
Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw Remote Control Encoder PT2268 Notes: 1. Dimensioning and tolerancing per ANSI Y14.5-1982. 2. Dimension “D” does not include mold flash, protrusions or gate burrs. Mold Flash protrusion or gate burrs shall not exceed 0.15mm (0.006 in) per side. 3. Dimension “E” does not include interlead flash or protrusions. Interlead flash or protrusions shall not exceed 0.25 mm (0.010 in) per side. 4. The chamfer on the body is optional. It is not present, a visual index feature must be located within the crosshatched area. 5. “L” is the length of the terminal for soldering to a substrate. 6. “N” is the number of terminal positions. (N=16) 7. The lead width “B” as measured 0.36 mm (0.014 in) or greater above the seating plane, shall not exceed a maximum value of 0.61 mm (0.24 in). 8. Controlling dimension: MILLIMETER. 9. Refer to JEDEC MS-013 Variation AA JEDEC is the trademark of JEDEC SOLID STATE TECHNOLOGY ASSOCIATION. PT2268 V2.5 - 16 - April, 2006 For:Natertech
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