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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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MPXM2102AS 데이터시트(PDF) 639 Page - Motorola, Inc |
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MPXM2102AS 데이터시트(HTML) 639 Page - Motorola, Inc |
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639 / 670 page  MC145012 4–47 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 = 7.5 MΩ) No. Symbol Parameter Test Condition Clocks Min* Typ** Max* Unit 1 1/fosc Oscillator Period Free–Running Sawtooth Measured at Pin 12 1 7.0 7.9 8.6 ms 2 tLED LED Pulse Period No Local Smoke, and No Remote Smoke 4096 28.8 32.4 35.2 s 3 Remote Smoke, but No Local Smoke — Extinguished 4 Local Smoke 64 0.45 0.5 0.55 5 Pushbutton Test 64 0.45 0.5 0.55 6 tw(LED), tw(stb) LED Pulse Width and Strobe Pulse Width 1 7.0 — 8.6 ms 7 tIRED IRED Pulse Period Smoke Test 1024 7.2 8.1 8.8 s 8 tIRED IRED Pulse Period Chamber Sensitivity Test, without Local Smoke 4096 28.8 32.4 35.2 s 9 Pushbutton Test 128 0.9 1 1.1 10 tw(IRED) IRED Pulse Width Tf* 94 116 µs 11 tr IRED Rise Time — — 30 µs 12 tf IRED Fall Time — — 200 13 ton Silver and Brass Temporal Mdlti Pl Width 64 0.45 0.5 0.55 s 14 toff Modulation Pulse Width 0.45 0.5 0.55 15 toffd 192 1.35 1.52 1.65 16 tCH Silver and Brass Chirp Pulse Period Low Supply or Degraded Chamber Sensitivity 4096 28.8 32.4 35.2 s 17 twCH Silver and Brass Chirp Pulse Width 1 7.0 7.9 8.6 ms 18 tRR Rising Edge on I/O to Smoke Alarm Response Time Remote Smoke, No Local Smoke — — 2 ! — s 19 tstb Strobe Out Pulse Period Smoke Test 1024 7.2 8.1 8.8 s 20 Chamber Sensitivity Test, without Local Smoke 4096 28.8 32.4 35.2 21 Low Supply Test, without Local Smoke 4096 28.8 32.4 35.2 22 Pushbutton Test — — 1 — * 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. The timing shown should accomodate the NFPA 72, ANSI S3.41, and ISO 8201 audible emergency evacuation signals. ** Typicals are not guaranteed. ! Time is typical — depends on what point in cycle signal is applied. Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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