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MPXM2102AS Datasheet(PDF) 619 Page - Motorola, Inc |
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MPXM2102AS Datasheet(HTML) 619 Page - Motorola, Inc |
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619 / 670 page  MC145010 4–27 Motorola Sensor Device Data www.motorola.com/semiconductors AC ELECTRICAL CHARACTERISTICS (Reference Timing Diagram Figures 3 and 4) (TA = 25°C, VDD = 9.0 V, Component Values from Figure 5: R1 = 100.0 KΩ, C3 = 1500.0 pF, R2 = 10.0 MΩ) No. Symbol Parameter Test Condition Clocks Min Max Unit 1 1/fosc Oscillator Period* Free–Running Sawtooth Measured at Pin 12 1 9.5 11.5 ms 2 tLED LED Pulse Period No Local Smoke, and No Remote Smoke 4096 38.9 47.1 s 3 Remote Smoke, but No Local Smoke — None 4 Local Smoke or Pushbutton Test 64 0.60 0.74 5 tw(LED), tw(stb) LED Pulse Width and Strobe Pulse Width 1 9.5 11.5 ms 6 tIRED IRED Pulse Period Smoke Test 1024 9.67 11.83 s 7 Chamber Sensitivity Test, without Local Smoke 4096 38.9 47.1 8 Pushbutton Test 32 0.302 0.370 9 tw(IRED) IRED Pulse Width Tf* 94 116 µs 10 tr IRED Rise Time — — 30 µs tf IRED Fall Time — — 200 11 tmod Silver and Brass Modulation Period Local or Remote Smoke — 297 363 ms 11,12 ton/tmod Silver and Brass Duty Cycle Local or Remote Smoke — 73 77 % 13 tCH Silver and Brass Chirp Pulse Period Low Supply or Degraded Chamber Sensitivity 4096 38.9 47.1 s 14 tw(CH) Silver and Brass Chirp Pulse Width Low Supply or Degraded Chamber Sensitivity 1 9.5 11.5 ms 15 tRR Rising Edge on I/O to Smoke Alarm Response Time Remote Smoke, No Local Smoke — — 800 ms 16 tstb Strobe Out Pulse Period Smoke Test 1024 9.67 11.83 s 17 Chamber Sensitivity Test, without Local Smoke 4096 38.9 47.1 18 Low Supply Test, without Local Smoke 4096 38.9 47.1 19 Pushbutton Test — 0.302 0.370 * Oscillator period T (= Tr + Tf) is determined by the external components R1, R2, and C3 where Tr = (0.6931) R2 * C3 and Tf = (0.6931) R1 * C3. The other timing characteristics are some multiple of the oscillator timing as shown in the table. Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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