PT2240B P Encoder IC D DESCR IPTION N PT T2240B is encoder e utiliz zing CMOS Technology spe ecially design ned for remo ote control ap pplications. It hass 220 Addresss. It can suppo ort up to 4 Data Bits and is housed in 8 pin SOP package e. It encodes address and datta codes into o a coded waveform w suittable for RF mo odulation. Th he pin assig gnments and d application circcuit are optim mized for eas sy PCB Layo out and cost savving advanta age. Furtherm more, PT2240 0B’s intrinsic fea ature of being able to o support 4 data bits con nsiderably red duces invento ory pressuress. FE EATUR RES • • • • • • • • • • CMOS techn nology Low power consumption c Least extern nal componen nts High noise im mmunity Single resisttor oscillator Operating vo oltage: 1.8~15V 4 Data pins 220 address codes Available in SOP package o inventory prressures Reduction of A APPLIC CATION NS • • • • • Burglar ala arm system Car securitty system Car/Garage e door contro oller Home/Officce security sy ystem Personal alarm a system B BLOCK K DIAGRAM Te el: 886-662962 288‧Fax: 886-29174598‧ htttp://www.princceton.com.tw‧2F, 233-1, Bao ociao Road, Sin ndian, Taipei 23 3145, Taiwan P PT2240B A APPLIC CATION N CIRC CUIT 8 PINS POWER FAILURE F E CIRCU UIT Warning: Be cautious to o use this circuit which will cause the IC shuttdown or evven damaged. V1.3 2 June, 2011 P PT2240B O ORDER R INFORMATION Va alid Part Num mber PT2240B-S S Packa age Type 8 Pins, SOP, 150mil Top Cod de PT2240B B-S P PIN CO ONFIGU URATIO ON P PIN DES SCRIP PTION V1.3 Pin Name V VDD V VSS I/O - DOUT O D0, D1 1, D2, D3 O OSC I I Des scription Positive pow wer supply Negative pow wer supply Data output pin p Normal=”Low w” Data pin Oscillator pin n 3 Pin n No. 1 2 3 7, 6, 5, 4 8 June, 2011 P PT2240B FUNCTION DESCRIIPTION N PT T2240B encod des the address code and data d set at D0 0 ~ D3 and A0 0 ~ A19 into a special wave eform and outtputs it to the DO OUT. This wavveform is fed to the RF mo odulator for tra ansmission. C CODE BIT TS A Code C Bit is the basic comp ponent of the encoded e wavveform, and ca an be classified as either an a (Address/D Data) Bit or a SY YNC (Synchro onous) Bit. AD DDRESS//DATA BIIT WAVEFORM An Address/Datta Bit can be designated d ass either Bit “0”” or “1” if it is in n High or Low w State respecctively. One bit waveform con nsists of one pulse cycle and each pulse e cycle has 12 28 oscillating time periods. For further details, d please refer to the dia agram below: here the oscillating time period, α=1/f and (f is the osscillation frequ uency) wh As you can see in the diagram above, Bit “0” consist off a “High“ Pulse for 32α (w where α=oscilllating time pe eriod) then anges to “LOW W” Pulse forr 96α. Likewisse, for Bit “1”, the “High” Pu ulse for 96α iss followed by “Low” Pulse for 32α. cha SY YNCHRO ONOUS (S SYNC.) BIIT WAVEF FORM The Synchronou us Bit Wavefo orm is 8 bits lo ong with 1/32 2 bit width pulse. Please re efer to the diagram below: V1.3 4 June, 2011 PT2240B CODE WORD A group of Code Bits is called a Code Word. A Code Word consists of 20 Address/4 Data Bits followed by one Sync Bit. Please refer to the diagram below: …… A0 A1 A2 A3 A16 A17 A18 A19 D3 D2 D1 D0 Sync. bit SINGLE RESISTOR OSCILLATOR The built-in oscillator circuit of PT2240B allows a precision oscillator to be constructed by connecting an external resistor (Rosc) to the OSC Pin. The typical oscillator frequency with various resistor values for PT2240B is given below: V1.3 5 June, 2011 PT2240B ABSOLUTE MAXIMUM RATINGS Parameter Operating voltage Symbol VDD Input voltage VIN Operating temperature Storage temperature Topr Tstg Condition VDD=12V All outputs not connected VDD=12V Rating -0.3 ~ 15 Unit V VSS-0.3 ~ VDD+0.3 V -40 ~ +85 -65 ~ +150 ℃ ℃ DC ELECTRICAL CHARACTERISTICS (Unless otherwise specified, Ta=25℃, VDD=12V) Parameter Symbol Condition Operating voltage VDD OSC connected to “Low” Stand-by current ISB other pins floating Operating current IOP Connect one data pin to “high” VDD=12V, VOH=5V DOUT output current IOH VDD=9V, VOH=4.5V VDD=3V, VOH=1.5V V1.3 6 Min. 1.8 Typ. 12 Max. 15 Unit V - - 1 μA -* 25 12 1.2 30 15 1.4 5 - mA mA June, 2011 PT2240B PACKAGE INFORMATION 8 PINS, SOP, 150MIL Symbol Notes: 1. Refer to JEDEC MS-012AA 2. All dimensions are in millimeter V1.3 A A1 A2 b c D E E1 e L L1 θ Millimeter Nom. 1.60 0.15 1.40 4.90 6.00 3.90 1.27BSC 0.60 1.04REF - Min. 1.35 0.10 1.25 0.33 0.17 4.80 5.80 3.80 0.40 0° 7 Max. 1.75 0.25 1.65 0.51 0.25 5.00 6.20 4.00 1.27 8° June, 2011 PT2240B 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 V1.3 8 June, 2011