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| @Ob3/4EAeN/|--1/2q MOSDESIGN SEMICONDUCTOR CORP. EN/DECODER 2 STATES ENCODER 2 A1/2s1/2XIC GENERAL DESCRIPTION \aO-z M1EA The M1EA is a CMOS ASIC encoder. It will en-code 12 parallel data inputs and serially transmit them to the output when transmit enable (TE) depressed. These address inputs are 2 states i.e. LOW (0) or OPEN (1). FEATURES ~So E Same Rosc matched to the Decoder M1DA/FA . E 212 = 4,096 codes. E 4 cycles transmission each time. E Direct data transmit typeG (Eliminating TE and diodes). w M1EA-HG switch to VDD. APPLICATIONS ~AI E Car/home alarm system, garage control etc.. BLOCK DIAGRAM \aeoI X Oscillator Y Freq Divider Output Driver DO TE A0 Input Control A11 Control Logic unit *All specs and applications shown above subject to change without prior notice. ( HWqoIW(R)aeENN|O ,1/2qow|ae-x) 1/6 2005-03-10 @Ob3/4EAeN/|--1/2q MOSDESIGN SEMICONDUCTOR CORP. EN/DECODER 2 STATES ENCODER 2 A1/2s1/2XIC ABSOLUTE MAXIMUM RATING Parameter Supply Voltage Input Voltage Operating Temperature Storage Temperature Rating -0.3 to 12 -0.2~VDD +0.2 0 to 70 -50 to 125 M1EA (TA=25J ) Unit V V J J ELECTRICAL CHARACTERISTICS Characteristics Operating Voltage Operating Current Quiescent Current Output Drive Current Input Voltage Oscillator Frequency Sym. VDD IOP ISB IO VIH VIL Fosc Min. 2.4 w w w Typ. w 0.1 0.1 2 VDD VSS 76 Max. 12 1 0.5 w VDD VSS +0.2 w Unit V mA gA mA V KHz No load Conditions @VDS=1.2V VDD -0.2 VSS w ExternalO 30% PIN DESCRIPTION No. 1~8 9 10~13 14 15 16 17 18 Name A0~A7 VSS A8~A11 TE Y X DO VDD Description Address inputs Negative power supply Address inputs Transmit enable Oscillator output Oscillator input Data output Positive power supply A0 A1 A2 A3 A4 A5 A6 A7 VSS M1EA 1 18 VDD DO X Y TE A11 A10 A9 9 10 A8 2/6 2005-03-10 @Ob3/4EAeN/|--1/2q MOSDESIGN SEMICONDUCTOR CORP. EN/DECODER 2 STATES ENCODER 2 A1/2s1/2XIC TIMING WAVEFORM (1) B IT FORMAT 1 2 32 33 64 65 96 M1EA OSC 32 CLOCKS 64 CLOCKS "0" "OPEN" 64 CLOCKS 32 CLOCKS (2) TIMING DIAGRAM TE A0 12 BITS SYNC 1st WORD SYNC A11 A0 4th WORD A11 DO M1EA F-V curve 250 75K 82K 200 91K 100K 150 Freq (KHz) 100 120K 150K 180K 200K 220K 50 270K 360K 0 2 7 VDD ( Volt ) 12 17 3/6 2005-03-10 @Ob3/4EAeN/|--1/2q MOSDESIGN SEMICONDUCTOR CORP. EN/DECODER 2 STATES ENCODER 2 A1/2s1/2XIC OPERATING FLOWCHART M1EA Power ON Stand-by N TEB depressed? 4 words data transmitted N TEB still depressed? Y 4/6 2005-03-10 @Ob3/4EAeN/|--1/2q MOSDESIGN SEMICONDUCTOR CORP. EN/DECODER 2 STATES ENCODER 2 A1/2s1/2XIC RECONNENDED OSCILLATOR PARAMETERS Rosc (K[ ) 75 82 91 100 120 150 180 200 220 270 300 330 360 M1EA/DA/FA (KHz) 261 241 220 203 168 133 113 101 94 75 67 63 56 M1EA DATA OUTPUT M1EA (D0~D3) 0 (VSS) 1 (OPEN) M1DA/FA (D0~D3) 1 (VDD) 0 (VSS) Freq-Rosc Chart ( @Vdd=12V ) 300 250 Freq ( KHz ) 200 150 100 50 0 0 50 100 150 200 250 300 350 400 M1EA/DA/FA Rosc ( KO ) 5/6 2005-03-10 @Ob3/4EAeN/|--1/2q MOSDESIGN SEMICONDUCTOR CORP. EN/DECODER 2 STATES ENCODER 2 A1/2s1/2XIC APPLICATION DIAGRAM N|OqoI M1EA M1EA VDD A0 A1 A2 A3 A4 A5 A6 A7 VSS 9 10 TE D3 D2 D1 D0 1 18 DO X Y Rosc A4 A5 A6 A7 VSS IR / RF M1EA VDD A0 A2 A3 X Y Rosc 1 16 DO IR / RF TE D3 D2 8 9 D1 M1EA-S 1 A0 DO A1 X A2 Y A3 A4 A5 A6 A7 VSS 10 11 TE A11/D3 A10/D2 A9/D1 A8/D0 Rosc 20 VDD IR / RF 6/6 2005-03-10 |
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