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MCZ146012EGR2 Datasheet(PDF) 5 Page - Freescale Semiconductor, Inc |
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MCZ146012EGR2 Datasheet(HTML) 5 Page - Freescale Semiconductor, Inc |
5 / 18 page Sensors Freescale Semiconductor 5 MC146012 No. Symbol Parameter Test Condition Clocks Min(1) Typ(2) Max(1) Unit 13 tON Silver and Brass Temporal Modulation Pulse Width 64 0.45 0.5 0.55 s 14 tOFF 64 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 tW(CH) Silver and Brass Chirp Pulse Width Low Supply or Degraded Chamber Sensitivity 1.0 7.2 8.0 8.8 ms 18 tRR Rising Edge on I/O to Smoke Alarm Response Time Remote Smoke, No local smoke —— 2.0(3) —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 s 21 Low Supply Test Without Local Smoke 4096 28.8 32.4 35.2 s 22 Pushbutton Test/Speed-Up — — 1.0 — s 23 tMUTE —6.0 8.0 11 min 1. Oscillator period T (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 shown in the table. The timing shown should accommodate the NFPA72, ANSI S3.41, and ISO8201 audible emergency evacuation signals. 2. Typicals are not guaranteed. 3. Time is typical-depends on what point in cycle the signal is applied. Table 3 . AC Electrical Characteristics (Refer to Timing Diagram Figure 3 and Figure 4. TA = 25°C, VDD = 9.0 V, Component Values from Figure 5.) (continued) |
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